BEGIN:VCALENDAR VERSION:2.0 PRODID:-//Dutch Petrophysical Society - ECPv6.15.13.1//NONSGML v1.0//EN CALSCALE:GREGORIAN METHOD:PUBLISH X-ORIGINAL-URL:https://www.dps-nl.org/wordpress X-WR-CALDESC:Events for Dutch Petrophysical Society REFRESH-INTERVAL;VALUE=DURATION:PT1H X-Robots-Tag:noindex X-PUBLISHED-TTL:PT1H BEGIN:VTIMEZONE TZID:Europe/Amsterdam BEGIN:DAYLIGHT TZOFFSETFROM:+0100 TZOFFSETTO:+0200 TZNAME:CEST DTSTART:20150329T010000 END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:+0200 TZOFFSETTO:+0100 TZNAME:CET DTSTART:20151025T010000 END:STANDARD BEGIN:DAYLIGHT TZOFFSETFROM:+0100 TZOFFSETTO:+0200 TZNAME:CEST DTSTART:20160327T010000 END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:+0200 TZOFFSETTO:+0100 TZNAME:CET DTSTART:20161030T010000 END:STANDARD BEGIN:DAYLIGHT TZOFFSETFROM:+0100 TZOFFSETTO:+0200 TZNAME:CEST DTSTART:20170326T010000 END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:+0200 TZOFFSETTO:+0100 TZNAME:CET DTSTART:20171029T010000 END:STANDARD BEGIN:DAYLIGHT TZOFFSETFROM:+0100 TZOFFSETTO:+0200 TZNAME:CEST DTSTART:20180325T010000 END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:+0200 TZOFFSETTO:+0100 TZNAME:CET DTSTART:20181028T010000 END:STANDARD BEGIN:DAYLIGHT TZOFFSETFROM:+0100 TZOFFSETTO:+0200 TZNAME:CEST DTSTART:20190331T010000 END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:+0200 TZOFFSETTO:+0100 TZNAME:CET DTSTART:20191027T010000 END:STANDARD BEGIN:DAYLIGHT TZOFFSETFROM:+0100 TZOFFSETTO:+0200 TZNAME:CEST DTSTART:20200329T010000 END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:+0200 TZOFFSETTO:+0100 TZNAME:CET DTSTART:20201025T010000 END:STANDARD BEGIN:DAYLIGHT TZOFFSETFROM:+0100 TZOFFSETTO:+0200 TZNAME:CEST DTSTART:20210328T010000 END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:+0200 TZOFFSETTO:+0100 TZNAME:CET DTSTART:20211031T010000 END:STANDARD BEGIN:DAYLIGHT TZOFFSETFROM:+0100 TZOFFSETTO:+0200 TZNAME:CEST DTSTART:20220327T010000 END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:+0200 TZOFFSETTO:+0100 TZNAME:CET DTSTART:20221030T010000 END:STANDARD BEGIN:DAYLIGHT TZOFFSETFROM:+0100 TZOFFSETTO:+0200 TZNAME:CEST DTSTART:20230326T010000 END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:+0200 TZOFFSETTO:+0100 TZNAME:CET DTSTART:20231029T010000 END:STANDARD BEGIN:DAYLIGHT TZOFFSETFROM:+0100 TZOFFSETTO:+0200 TZNAME:CEST DTSTART:20240331T010000 END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:+0200 TZOFFSETTO:+0100 TZNAME:CET DTSTART:20241027T010000 END:STANDARD BEGIN:DAYLIGHT TZOFFSETFROM:+0100 TZOFFSETTO:+0200 TZNAME:CEST DTSTART:20250330T010000 END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:+0200 TZOFFSETTO:+0100 TZNAME:CET DTSTART:20251026T010000 END:STANDARD BEGIN:DAYLIGHT TZOFFSETFROM:+0100 TZOFFSETTO:+0200 TZNAME:CEST DTSTART:20260329T010000 END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:+0200 TZOFFSETTO:+0100 TZNAME:CET DTSTART:20261025T010000 END:STANDARD END:VTIMEZONE BEGIN:VTIMEZONE TZID:Europe/Paris BEGIN:DAYLIGHT TZOFFSETFROM:+0100 TZOFFSETTO:+0200 TZNAME:CEST DTSTART:20170326T010000 END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:+0200 TZOFFSETTO:+0100 TZNAME:CET DTSTART:20171029T010000 END:STANDARD BEGIN:DAYLIGHT TZOFFSETFROM:+0100 TZOFFSETTO:+0200 TZNAME:CEST DTSTART:20180325T010000 END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:+0200 TZOFFSETTO:+0100 TZNAME:CET DTSTART:20181028T010000 END:STANDARD BEGIN:DAYLIGHT TZOFFSETFROM:+0100 TZOFFSETTO:+0200 TZNAME:CEST DTSTART:20190331T010000 END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:+0200 TZOFFSETTO:+0100 TZNAME:CET DTSTART:20191027T010000 END:STANDARD END:VTIMEZONE BEGIN:VTIMEZONE TZID:Europe/Helsinki BEGIN:DAYLIGHT TZOFFSETFROM:+0200 TZOFFSETTO:+0300 TZNAME:EEST DTSTART:20160327T010000 END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:+0300 TZOFFSETTO:+0200 TZNAME:EET DTSTART:20161030T010000 END:STANDARD BEGIN:DAYLIGHT TZOFFSETFROM:+0200 TZOFFSETTO:+0300 TZNAME:EEST DTSTART:20170326T010000 END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:+0300 TZOFFSETTO:+0200 TZNAME:EET DTSTART:20171029T010000 END:STANDARD BEGIN:DAYLIGHT TZOFFSETFROM:+0200 TZOFFSETTO:+0300 TZNAME:EEST DTSTART:20180325T010000 END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:+0300 TZOFFSETTO:+0200 TZNAME:EET DTSTART:20181028T010000 END:STANDARD END:VTIMEZONE BEGIN:VEVENT DTSTART;TZID=Europe/Amsterdam:20250605T153000 DTEND;TZID=Europe/Amsterdam:20250605T173000 DTSTAMP:20260517T073741 CREATED:20250529T091541Z LAST-MODIFIED:20250529T091541Z UID:792-1749137400-1749144600@www.dps-nl.org SUMMARY:DPS June Meeting DESCRIPTION:Dear DPS Member\,\nThe next DPS meeting is on June 5th (Thursday)\nWe meet at our usual venue at Kivi Den Haag (Prinsessegracht 23\, 2514 AP Den Haag)\nPre-meeting coffee is served at 15:30h and talk commence at 16:00h.\nSocial hour will follow after the talks\nAttendance is free of charge. \nThe meeting will feature two speakers with following topics: \n A New Approach of In Situ Flow Diagnostic using Ultra Compact Instruments: applications to oil & gas and geothermal \n by Virginie Schoepf (Openfield Technology) \n Obtaining Remaining Oil Saturation For The Johan Sverdrup Field From a Variety of Logging Data\nby Brice Fortier (Equinor) & SPWLA Distinguished Lecturer \nMore details will follow soon! \nLooking forward to seeing you there\nDPS Board URL:https://www.dps-nl.org/wordpress/event/dps-june-meeting/ LOCATION:KIVI\, Prinsessegracht 23\, Den Haag \, 2514 AP ORGANIZER;CN="Dutch Petrophysical Society":MAILTO:info@dps-nl.org END:VEVENT BEGIN:VEVENT DTSTART;TZID=Europe/Amsterdam:20241212T160000 DTEND;TZID=Europe/Amsterdam:20241212T173000 DTSTAMP:20260517T073741 CREATED:20241027T201410Z LAST-MODIFIED:20241210T122322Z UID:774-1734019200-1734024600@www.dps-nl.org SUMMARY:December 2024 Meeting and Christmas Social DESCRIPTION:We will be holding the traditional December meeting and Christmas social on Thursday 12th December 2024 at our usual venue Kivi in Den Haag. \nGeo-Hazard Monitoring and Modelling\nDoors will open for registration at 15:30 with the meeting commencing at 16:00. \nAfter the meeting we will have our traditional Christmas social with a delicious and extensive buffet at KIVI. \nAttendance is free of charge for DPS members \nWe host two speakers sharing their expertise on the topic:\nHan Claringbould (Geothermal Consultancy Sproule) and Peter A. Fokker (TNO) \nTalk 1:\nA Pragmatic Approach to Monitoring Induced Seismicity and Subsidence at Geothermal Operations\nSpeaker: Han Claringbould\, Team lead\, Geothermal Consultancy Sproule\, Voorburg\, The Netherlands \nAbstract:\nGeohazards such as induced seismicity and subsidence are commonly\, and often wrongly\, associated with geothermal operations. Due to the vastly different types of geothermal plays and variable local geologic conditions\, the public perception of risk related to a geothermal system is regularly misinterpreted. The public’s perception of subsurface or mining activities can put a geothermal project’s social license to operate at risk but may not fully account for the conditions that have the greatest impact on geohazards such as geothermal reservoir characteristics (e.g.\, matrix permeable sands\, fractured carbonates\, or enhanced/engineered fracture networks) or local geological setting (e.g.\, tectonically active region\, presence of faults). \nIn the Netherlands\, geothermal heat from sand matrix permeable reservoirs has been produced for over a decade. During this time\, no geohazards have been associated with geothermal operations producing from sandstone aquifers. One exception was induced micro-seismicity associated with a geothermal project – now closed – operating from a fractured carbonate reservoir. Public perception of geothermal operation has been negatively influenced by activity involving onshore wells and limited seismicity resulting from depleted gas reservoirs in the northern part of the Netherlands. This has led to very conservative regulations for all subsurface mining activities\, including geothermal operations. Currently all potential geothermal projects must evaluate the geohazard risk according to a rigid guideline to obtain necessary permits. Furthermore\, many projects have to abide by a strict seismic risk protocol that includes a traffic light hazard quantification system to mitigate risk. \nGeothermal operators can bring in specialists to set up systems such as local seismic networks to monitor geohazard risk. However\, the expense and sensitivity of these services are commonly disproportionate to the actual risk presented by the project. To reduce both the cost of installing a high- resolution monitoring system\, and the subsequent operating costs\, we have developed a pragmatic solution to monitoring geohazards using publicly available data. Seismic activity is monitored from the national seismic monitoring network (KNMI); subsidence is measured using Interferometric Synthetic Aperture Radar (InSar) data from the ESA Sentinel-A satellite. \nPotential geohazards are characterized using Python-based data processing and visualization scripts. These geohazard monitoring tools provide geothermal operators with a cost-efficient solution that aligns with responsible geohazard management. This internationally scalable monitoring approach is currently being deployed at twelve geothermal systems across the Netherlands\, providing project operators with effective and transparent geohazard management for government regulators and the public. \nSpeaker Bio:\nHan Claringbould is Team Lead\, Geothermal Consultancy and Senior Geoscientist at Sproule. He has expert understanding of low-medium enthalpy geothermal systems\, geo-hazard risk assessment and management\, and upper-crustal geology. Through his current role\, Han: leads Sproule’s geothermal consultancy services\, providing tailored strategic and technical advice along the full lifecycle of geothermal assets; conducts technical and economic due diligence of (prospective) geothermal developments; and performs monitoring and analyses of seismic activity and subsidence around geothermal sites.\nAs a seasoned project manager at Sproule\, Han leads and oversees multi-disciplinary projects involving the exploration\, realization\, and exploitation of geothermal operations in the Netherlands as well as abroad (North and South America\, and Europe). He has a deep understanding of the Dutch subsurface geology and geothermal reservoir characteristics of the typical\, deep\, matrix-permeable sedimentary systems. Moreover\, Han is one of the leading experts in geohazards management for geothermal operations in the Netherlands. He developed a seismic monitoring tool that is currently active at the majority of the operating geothermal assets in the Netherlands\, has written Seismic Risk Management Plans for many geothermal operations\, and\, as part of the Geothermie Nederland subsurface working group\, develops the guidelines for safe and responsible geohazard management for geothermal.\nPrior to Sproule\, Han has gained over a decade of experience in exploration and upper-crustal stress and strain development analyses from E&P companies and leading research institutions globally. This includes research into fault characterization and stress evolution at the Earthquake Research Institute of The University of Tokyo\, and sedimentation and tectonics at Lamont-Doherty Earth Observatory of Columbia University in New York. He has a B.Sc. Earth Sciences from Utrecht University\, a M.Sc.\nGeology from Colorado School of Mines\, and obtained a Ph.D. Geology from Imperial College London studying upper-crustal stress and strain evolution. \nTalk 2:\nSRIMA: a fast tool for the assessment of potential induced seismicity and fracturing\nSpeaker: Peter A. Fokker\, Reservoir Geomechanicist \,TNO\, Utrecht\, The Netherlands \nAbstract:\nThe safe and effective deployment of geothermal energy and storage of carbon dioxide requires an assessment of potential induced seismicity and fracturing through the seal above the reservoir. To aid such assessment we have built the SRIMA tool (Seal and Reservoir Integrity through Mechanical Analysis) and we have made it available online. The tool can be used in the Standard extended Seismic Hazard Analysis\, which is part of the seismic hazard and risk assessment for geothermal projects in the Netherlands. SRIMA is a fast semi-analytical tool that provides a scenario-based analysis of pressure and temperature changes around an injection well\, the resulting stress changes on nearby faults\, reactivated fault area\, the maximum credible earthquake magnitude\, the resulting PGV distribution and an estimate of damage. SRIMA also computes the potential for development of tensile fracture in the seal and base. SRIMA has been designed to give first-order estimates of these results. All calculations can be performed in a stochastic framework\, which allows the assessment of failure probabilities. In this presentation\, the physics incorporated in the tool will be briefly presented\, and the application will be demonstrated with examples. \nSpeaker Bio:\nPeter Fokker is senior scientist in the Reservoir Geomechanics group in TNO\, and a guest researcher at Utrecht University and Politecnico di Torino (Italy). His research interests are related to the sustainable use of the subsurface in the field of geomechanics and reservoir engineering\, with a key link to geology and remote sensing. He has worked extensively on coupled models and inverse modelling. Applications include subsidence and seismicity induced by hydrocarbon production\, underground storage\, and geothermal energy. He holds MSc and PhD degrees in physics from Utrecht University. \nLooking forward to seeing you there\nDPS Board \nYou can sign up below\, or send a mail to info@dps-nl.org with your name and affiliation. \n  URL:https://www.dps-nl.org/wordpress/event/december-2024-meeting-and-christmas-social/ LOCATION:KIVI\, Prinsessegracht 23\, Den Haag \, 2514 AP ORGANIZER;CN="Dutch Petrophysical Society":MAILTO:info@dps-nl.org END:VEVENT BEGIN:VEVENT DTSTART;TZID=Europe/Amsterdam:20230601T153000 DTEND;TZID=Europe/Amsterdam:20230601T170000 DTSTAMP:20260517T073741 CREATED:20230526T154521Z LAST-MODIFIED:20230526T154521Z UID:762-1685633400-1685638800@www.dps-nl.org SUMMARY:DPS June 2023 Meeting - Value of Data for Decision Making DESCRIPTION:The DPS June meeting will be happening on Thursday 1st June at out usual venue KIVI in Den Haag. Door will open for pre-meeting coffees at 15:30\, and the meeting commences at 16:00.  Note that as for the previous meeting we will be holding the meeting in the ‘Molkamer’ on the first floor rather than our previous venue the Grote Zaal. \nJean-Paul Koninx from DecisionQraft will be presenting a talk on The Value of Data for Decision Making. The talk abstract and speaker bio is below. \nAfter the meeting there will be our usual social with drinks at a local cafe. \nAs always\, thanks to the generosity of our sponsors\, attendance is free for members of the DPS. \nAbstract: We make many decisions\, all the time\, consciously and unconsciously. Some are easy\, while others keep us up at night. If only we knew the outcomes … But we don’t. Uncertainty is what makes it hard to make some decisions\, and the fear of poor outcomes. \nWhen you simply assign a bad outcome to “bad luck”\, you are not doing yourself a favour. You give away your agency for decision making and the opportunity to learn. \nEveryone can learn what it takes to make a better-quality decision\, every time. We can’t predict future with certainty. But we can increase the odds for better outcomes by crafting better quality decisions. To get more of what we value\, with more transparency\, and less stress. \nLearn more about crafting quality decisions in this 1-hour introduction. \nAbout the speaker:  \nJean-Paul Koninx left Shell in January 2023\, after almost 30 years in a variety of subsurface and Front-End development related roles\, in The Netherlands\, Venezuela\, Australia\, Oman\, Norway\, and – until the spring of 2022 – Russia. Making decisions under uncertainty has been the red thread during this time\, and he was closely involved in Shell’s Organisational Decision Quality efforts over the past 5 years. \nIn January 2023 he started DecisionQraft (www.DecisionQraft.com)\, dedicated to help crafting quality decisions\, combining the science of decision analysis with the art of dealing with people. URL:https://www.dps-nl.org/wordpress/event/dps-june-2023-meeting-value-of-data-for-decision-making/ LOCATION:KIVI\, Prinsessegracht 23\, Den Haag \, 2514 AP ORGANIZER;CN="Dutch Petrophysical Society":MAILTO:info@dps-nl.org END:VEVENT BEGIN:VEVENT DTSTART;TZID=Europe/Amsterdam:20230309T153000 DTEND;TZID=Europe/Amsterdam:20230309T170000 DTSTAMP:20260517T073741 CREATED:20230227T144321Z LAST-MODIFIED:20230306T103015Z UID:751-1678375800-1678381200@www.dps-nl.org SUMMARY:March 2023 Meeting DESCRIPTION:The next Dutch Petrophysical Society meeting will be held on Thursday 9th March 2023 with the topic “Geothermal – The SCAN Project”. \nThe meeting will be held at our usual venue KIVI in Den Haag (Prinsessengracht 23\, 2514 AP Den Haag) with doors opening for pre-meeting coffees at 15:30\, and the meeting commencing at 16:00.  Note that as for the previous meeting we will be holding the meeting in the ‘Molkamer’ on the first floor rather than our previous venue the Grote zaal. \nYou can register for the meeting below. \nWe have one talk “De-risking Dutch Geothermal Plays by Acquiring Subsurface Data – The SCAN Borehole Data-Acquisition Strategy” presented by Adriaan Janszen\, Geoscientist\, EBN BV. which will be followed by a discussion. \nAfter the meeting there will be our usual social with drinks at a local cafe. \nAs always\, thanks to the generosity of our sponsors\, attendance is free for members of the DPS. \n\nDe-risking Dutch Geothermal Plays by Acquiring Subsurface Data – The SCAN Borehole Data-Acquisition Strategy.\n\nSpeaker: Adriaan Janszen\, Geoscientist\, EBN BV.\n\nAbstract:\nIn 2017 EBN and TNO-AGE embarked on a geothermal exploration program (SCAN: ‘Seismische Campagne Aardwarmte Nederland’) to better define the geothermal prospectivity by reducing subsurface uncertainties through data acquisition. This program is government-funded through the Dutch Ministry of Economic Affairs and Climate and focused on acquiring regional 2D seismic data; reprocessing of existing 2D seismic data; and drilling of 7-10 data-acquisition boreholes (anticipated to be drilled between 2023 and 2025). \nThe SCAN boreholes will be drilled with the sole purpose of collecting subsurface data to de-risk relevant geothermal plays in areas in which previously limited data was available. The aim is for the boreholes to become key reference points representative of the Dutch subsurface domains and geothermal plays. Extensive acquisition of high-quality data is therefore essential. \nA dedicated data-acquisition program was conceived to define what data should be acquired across different intervals. A well-thought-out data-acquisition strategy for the whole SCAN drilling campaign provides clarity during the design and tendering phase. It will be clear for internal and external parties what data to expect and ensures that data acquired in the SCAN wells can easily be compared and correlated. A generic data acquisition program that applies to all SCAN wells is also desirable for simplicity and allows for early-stage operational planning and cost-efficiency. \nThe resulting SCAN data-acquisition program is very comprehensive. For each borehole it consists of open-hole logging\, coring\, well testing\, formation fluid sampling\, formation-stress tests\, temperature measurements\, Vertical Seismic Profiles and mudlogging. All the resulting data will be made public\, free of charge\, on the SCAN website and the Dutch subsurface portal (NLOG) following drilling. \nIn this talk we will present the rationale and process of building the SCAN data-acquisition strategy and show examples of how this was applied to the first borehole that the project intends to drill later this year. \nSpeaker Bio:\nAdriaan Janszen is a geoscientist working at EBN on maturation of the SCAN data-acquisition boreholes. Before joining EBN he worked as an exploration geologist at ExxonMobil on new ventures throughout the European continent. Adriaan has a PhD degree from Delft University of Technology where he researched the reservoir quality and distribution of glaciogenic reservoirs. URL:https://www.dps-nl.org/wordpress/event/march-2023-meeting/ LOCATION:KIVI\, Prinsessegracht 23\, Den Haag \, 2514 AP ORGANIZER;CN="Dutch Petrophysical Society":MAILTO:info@dps-nl.org END:VEVENT BEGIN:VEVENT DTSTART;TZID=Europe/Amsterdam:20221208T160000 DTEND;TZID=Europe/Amsterdam:20221208T180000 DTSTAMP:20260517T073741 CREATED:20221124T090331Z LAST-MODIFIED:20221124T090331Z UID:734-1670515200-1670522400@www.dps-nl.org SUMMARY:DPS December 2022 Meeting - Electromagnetic Methods for Formation Saturation Determination DESCRIPTION:On Thursday 8th December 2022 we will be holding our December meeting with the topic “Electromagnetic Methods for Formation Saturation Determination”. \nThe meeting will be held at our usual venue KIVI in Den Haag (Prinsessengracht 23\, 2514 AP Den Haag) with doors opening for pre-meeting coffees at 15:30\, and the meeting commencing at 16:00.  Note we will be holding the meeting in the ‘Molkamer’ on the first floor rather than our usual venue the Grote zaal. \nYou can register for the meeting using the usual DPS email\, or via the form below. \nWe will have two presenters: Geoff Page\, Europe Region/Global Petrophysics Advisor\, Baker Hughes and Scott J. Jacobsen\, Vice President Interpretation Development\, NoHiddenPay\, LLC\, who will share their expertise in two talks. Abstracts and presenter biographies are below. \nAfter the meeting there will be our traditional pre-Christmas social with drinks at a local cafe. \nAs always\, thanks to the generosity of our sponsors\, attendance is free for members of the DPS. \nLooking forward to seeing you at the meeting\, \nThe Dutch Petrophysical Society Board \n\nTalk 1\nTitle: Converting Resistivity to Saturation: The Development of Saturation Equations – “Which one should I use?” \nSpeaker: Geoffrey C. Page\, Europe Region/Global Petrophysics Advisor\, Baker Hughes. \nAbstract:\nQuantitative water saturation analysis was introduced by Archie in 1942\, and since then has been refined by many people\, resulting in a wide variety of equations\, all based on detailed lab work. However; today core is expensive\, it is very easy to pick an equation from a list of computer options\, press a button\, and get a result that we like – but do we know the equation origins and is it applicable to the reservoir we are working on? \nIs resistivity even the best method today?? \nSpeaker Bio:\nGeoff(rey) Page is Baker Hughes Europe Region/Global Petrophysics Advisor based in Aberdeen. He began logging in France with “Dresser Atlas” (Now Baker Hughes) in 1980\, and was one of the first members of the “International MWD Society” (Now merged into SPWLA) in the late 1980’s\, and was President of the Aberdeen Chapter of SPWLA in 1988. For over 30 years Geoff has spent many weeks a year teaching Logs/Petrophysics to engineers\, customers\, and for several Msc courses at Aberdeen University and has introduced the topic to over 1500 people over the years. In 2019 he was awarded the SPWLA distinguished Technical achievement award at the Annual conference. \nTalk 2\nTitle: The Petrophysics of Dielectric Permittivity at LWD Frequencies: Observations in a High-Permeability Sandstone Reservoir in the North Sea \nSpeaker: Scott J. Jacobsen\, Vice President Interpretation Development\, NoHiddenPay\, LLC \nAbstract:\nLogging While Drilling (LWD) resistivity tools use electromagnetic propagation-resistivity measurements in formation evaluation to determine the water saturation of rocks. These measurements provide phase shift (PS) and attenuation (AT) from the signal ratio between a pair of receivers. As electromagnetic measurements in the frequency range from mid-100-kHz to low-MHz\, they depend on both the dielectric permittivity and the electric conductivity of the surrounding medium. Traditionally\, PS and AT have been independently converted to apparent resistivities where the dielectric permittivity was considered small enough to be replaced by a conductivity-based estimate. \nThis assumption of small dielectric permittivity proved to be not always valid. In some rock types with fairly high clay content and especially in some hydrocarbon-rich shales the relative dielectric permittivity could become large. In all formations however\, dielectric permittivity shows a strong frequency dependence\, which is called “dispersion”. An efficient and accurate inversion of any common type of axisymmetric LWD propagation resistivity tool has been recently developed and implemented to provide formation permittivity dispersion in this LWD frequency band. This allows petrophysical exploitation of these new\, mid-frequency\, formation properties. \nWireline dielectric tools\, which typically operate in the high-100-MHz to low-GHz frequency range provide formation permittivity dispersion that is used to derive salinity-independent\, water-filled porosity and formation resistivity factor in clean carbonates. We make use of a recently published wideband dielectric property model\, and focusing on the new\, LWD mid-frequency formation properties\, we investigate the validity of deriving the same salinity-independent\, water-filled porosity in shaly sands in a North Sea reservoir using 2 MHz formation permittivity at radial distances which far exceed the shallow investigation volume of the GHz measurements of just a few inches. \nWe also share observations of LWD band permittivity dispersion as it relates to characteristic dispersion provided by concurrent wireline low-frequency (26 kHz) induction tool and high-frequency dielectric tool permittivity and conductivity data in both conventional and unconventional types of reservoirs. We assert that wideband formation permittivity dispersion may be approximated by LWD band permittivity dispersion for practical operational and drilling efficiency\, and will potentially open up a whole new set of opportunities for more petrophysical insight into controls on well productivity. \nSpeaker Bio:\nScott J. Jacobsen is currently Vice President of Interpretation Development with NoHiddenPay LLC\, in Houston. His primary focus is on resistivity and EM technology log modeling and interpretation\, and subsequent application to well productivity. Prior to this\, he spent 10 years as a Technical Expert –Petrophysics at Southwestern Energy\, working with both exploration and then asset development teams in most U.S. unconventional plays\, from Niobrara to Marcellus. He began his career with Schlumberger as a field engineer in 1975 and held many application development positions in the US\, North Sea\, and the Middle East\, including Manager of Interpretation Development for North America. He retired from Schlumberger as a Petrophysics Advisor and as Petrophysics Domain Champion for the U.S. Scott is a member of SPWLA and SPE. He was co-author of an SPWLA Best Symposium Paper award in 1987 and was an SPWLA Distinguished Speaker in 1991 and in 2006. He has a BS in Electronics Technology from Northern Ill. U. and a BS in Electrical Engineering from the U. of Notre Dame. URL:https://www.dps-nl.org/wordpress/event/dps-december-2022-meeting-electromagnetic-methods-for-formation-saturation-determination/ LOCATION:KIVI\, Prinsessegracht 23\, Den Haag \, 2514 AP ORGANIZER;CN="Dutch Petrophysical Society":MAILTO:info@dps-nl.org END:VEVENT BEGIN:VEVENT DTSTART;TZID=Europe/Amsterdam:20220908T153000 DTEND;TZID=Europe/Amsterdam:20220908T173000 DTSTAMP:20260517T073741 CREATED:20220830T144249Z LAST-MODIFIED:20220830T144249Z UID:729-1662651000-1662658200@www.dps-nl.org SUMMARY:September 2022 Meeting - Formation Testing DESCRIPTION:The next DPS meeting will be on Thursday 8th September 2022 with the topic “Formation Testing”. \nThe meeting will be held at our usual venue KIVI in Den Haag (Prinsessengracht 23\, 2514 AP Den Haag) with doors opening for pre-meeting coffees at 15:30\, and the meeting commencing at 16:00. \nYou can register for the meeting below or by emailing info@dps-nl.org with your details and affiliation. \nWe will have two presenters: Thomas Pfeiffer\, Senior Staff Petrophysicist\, Fluid Evaluation and Sampling Technology Team\, Shell and Mirano Spalburg\, Retired (formerly of Shell)\, who will share their expertise in two talks. Abstracts and presenter bios are below. \nAfter the meeting there will be our usual social with drinks at a local cafe. \nAs always\, thanks to the generosity of our sponsors\, attendance is free for members of the DPS. \nLooking forward to seeing you there\, \nThe Dutch Petrophysical Society Board \n\nTalk 1: Integrating Fluid Data for Optimum Decision Quality \nThomas Pfeiffer\, Senior Staff Petrophysicist\, Fluid Evaluation and Sampling Technology Team\, Shell \nAbstract:\nIntegration of formation testing and fluid data needs to be viewed in the subsurface context to arrive at the most probable and consistent answer about fluid grading and reservoir architecture. \nWe discuss how predrill information and advanced mud gas data help to plan pretest acquisition and gradient interpretation and how they guide sample acquisition. Sample data quality control identifies outliers and bad data. An instance of advanced sample analysis illustrates how the data can be used beyond its original purpose to further understanding of subsurface complexity. A discussion of acceptable contamination levels and special aspects when sampling water leads to interpretation techniques that identify the most consistent scenario. \nSpeaker Bio: \nThomas Pfeiffer is currently a senior staff Petrophysicist in Shell’s Fluid Evaluation and Sampling Technology Team based in The Hague. \nHe holds Master of Science degrees in Petroleum Engineering from Texas A&M University and in Electrical Engineering from the Technical University of Munich\, Germany.\nPrior to joining Shell\, Thomas has worked for 18 years at Schlumberger in various roles including Wireline Field Engineer\, MDT specialist Engineer\, Field Service Manager and Principal Reservoir Domain Champion. \nThomas has over 20 years’ experience in designing\, executing and interpreting Wireline Formation Testing. In his position with Shell\, he collaborates with all major wireline service companies and laboratory vendors. \n\nTalk 2: Bayesian Formation Pressure Analysis \nMirano Spalburg\, Retired \nAbstract:\nFormation pressure gradient analysis usually relies on the application of least squares linear regression to the measured data over the water\, the oil\, and the gas bearing sections\, separately. Fluid density values are inferred from the slope of the regression lines. Free fluid level depths are inferred from the intercept positions\nbetween the regression lines. Fluid density and free fluid level uncertainty may then be estimated using the slope and intercept uncertainty of the individual regression lines. However\, this uncertainty analysis is cumbersome and does not provide a flexible statistical means to include prior knowledge on fluid density values and free fluid levels. To improve the situation\, a new method\, based on least squares linear- spline regression is presented. The method uses\, as a pressure versus depth model\, a single linear spline. A linear spline consists out of multiple linear line sections\nconnected at knots. The line sections represent pressure versus depth gradients per fluid section. The knots represent free fluid level positions. Disadvantage of this method is that mathematics does not (seem to) supply an analytical solution for fitting a linear spline to formation pressure data. Therefore\, numerical methods are\napplied that rely on generating a very large number of possible spline solutions\, calculating the least squares fit value for each spline to the measured data\, and summarizing the result as statistical distributions of free fluid levels depths and\nformation fluid density values. These numerical methods enable a Bayesian interpretation\, whereby each spline is given a prior probability that\, together with its least squares fit result\, yields a posterior probability. The analysis results are the\nposterior probability distributions. In practice\, many millions spline solutions are required to generate results with sufficient granularity and statistical resolution. Generating and analyzing that many splines takes less than a few seconds and that allows this new method to be applied interactively to formation pressure data\nanalysis. In addition to the method’s principles\, application to a few field cases will be presented. \nSpeaker Bio:\nMirano Spalburg is retired. He enjoyed working for Shell as a petrophysical assurer\, a studies and operational petrophysicist\, and as a researcher\, over a 30+ years period. Research topics included dielectrics and resistivity interpretation\, resolution enhancement of resistivity tools\, modeling of logging while drilling tools\, and the application of Bayesian belief networks to value of information cases. Operational and studies work included postings to the United Kingdom and Canada. Petrophysical assurance was focused on the worldwide work of studies teams in the Netherlands. He has a PhD in Mathematics and Physics and an almost lifelong affection for Bayesian methods. URL:https://www.dps-nl.org/wordpress/event/september-2022-meeting-formation-testing/ LOCATION:KIVI\, Prinsessegracht 23\, Den Haag \, 2514 AP ORGANIZER;CN="Dutch Petrophysical Society":MAILTO:info@dps-nl.org END:VEVENT BEGIN:VEVENT DTSTART;TZID=Europe/Amsterdam:20220310T153000 DTEND;TZID=Europe/Amsterdam:20220310T190000 DTSTAMP:20260517T073741 CREATED:20220218T103945Z LAST-MODIFIED:20220218T103945Z UID:700-1646926200-1646938800@www.dps-nl.org SUMMARY:March 2022 Meeting - The Future of Petrophysics DESCRIPTION:To keep you up to date\, we are busy planning the next meeting of the DPS which will be held on Thursday 10th March 2022. \nAs the Dutch COVID restrictions are being relaxed\, we are planning to hold the meeting in person for the first time in over two years. And for this we are planning something special – we will be conducting a panel discussion “The Future of Petrophysics” that was unfortunately postponed from December 2021. The panel will comprise representatives from industry\, academia\, young professionals\, and government to discuss the future of petrophysics and how it can contribute to the changes in the energy landscape. \nIf you are interested to sit on the panel\, or have suggestions for discussion topics please contact us to let us know by email at info@dps-nl.org. \nThe meeting will be held at our usual venue KIVI in Den Haag (Prinsessengracht 23\, 2514 AP Den Haag) with doors opening for pre-meeting coffees at 15:30\, and the meeting commencing at 16:00. After the meeting there will be our usual social with drinks – we’re expecting that everyone will be looking forward to catching up after the long period of isolation! \nFor the meeting\, we will be following all appropriate COVID protocols as required by the Dutch Government and KIVI. \nYou can express your interest in attending below\, or you register by contacting us ay info@dps-nl.org. \nAs always\, thanks to the generosity of our sponsors\, attendance is free for members of the DPS. \nHope to see you at the meeting\, \nThe Dutch Petrophysical Society Board URL:https://www.dps-nl.org/wordpress/event/march-2022-meeting-the-future-of-petrophysics/ LOCATION:KIVI\, Prinsessegracht 23\, Den Haag \, 2514 AP ORGANIZER;CN="Dutch Petrophysical Society":MAILTO:info@dps-nl.org END:VEVENT BEGIN:VEVENT DTSTART;TZID=Europe/Amsterdam:20211202T153000 DTEND;TZID=Europe/Amsterdam:20211202T173000 DTSTAMP:20260517T073741 CREATED:20211126T074859Z LAST-MODIFIED:20211129T073124Z UID:693-1638459000-1638466200@www.dps-nl.org SUMMARY:December 2021 Meeting - Subsurface Evaluation for Nuclear Waste Storage DESCRIPTION:The December DPS meeting be going ahead online on Thursday 2nd December\, with the subject of “Subsurface Evaluation for Nuclear Waste Storage”. \nWe have two presenters\, Rodney Garrard from NAGRA and Emilie Peyret from Schlumberger who will be presenting their work on a recent nuclear waste storage project. You can find abstracts and presenter biographies below. We wish to thank both Rodney and Emilie for offering to present at very short notice. \nThe virtual doors open at 15:30 with the meeting commencing at 16:00 NL time. The meeting will again be be conducted using GoToMeeting facilitated by the SPWLA. You can register at the following link: https://attendee.gotowebinar.com/register/4202707694403099406 \nAs always\, thanks to the generosity of our sponsors\, attendance is free for members of the DPS. \n\nWireline Logging and Microhydraulic Fracturing at NAGRA \n\n\n\n\nDr. Rodney Garrard\,\nProject Manager Logging and Testing\, Nagra \nEmilie Peyret\nReservoir Domain Champion\, Schlumberger \nNagra’s waste management concept foresees the deep geological disposal of radioactive waste in the clay-rich\, mid-Jurassic\, Opalinus Clay. The safe disposal of radioactive waste requires an accurate characterization of the mineralogy and fluids and structural geological setting in the host rock and its confining units. Wireline logging was an integral component of the extensive data acquisition program and represented a critical input to the overall assessment of the sites by providing direct input on mineral content and especially the clay content and type (i.e. splitting the clays into several end-members such as kaolinite\, smectite\, illite and chlorites) and to measure the pore volume and provide direct input on the mechanical properties\, stresses and identification of possible fractures and faults and serving as a well-tie to acquired seismic data. As part of the data acquisition program\, a strong focus has also been made on wireline-conveyed micro-hydraulic fracturing as one of key measurements for a robust understanding of the stresses with protocols developed to maximize the success rate and coverage in a diverse lithological column. \n\n\nAbout the Presenters \n\n Rodney Garrard is a geologist with over 18 years’ international experience in the oil and gas industry. Past duties include mudlogging\, LWD/MWD for Schlumberger\, Halliburton and Wellsite and Operations Geology for Chevron\, Wintershall and VNG (Neptune Energy)\, Det Norsk\, and Tullow Energy. Since 2018 he has been working as Project Manager for Nagra’s geological disposal assessment project. \n \nEmilie Peyret is a Reservoir Domain Champion with Schlumberger based in Bucharest\, Romania\, with experience in wireline formation testing. She has worked in Kuwait\, Mexico\, Central and West Africa\, and Europe. She started her career as a wireline field engineer before moving on to interpretation as a borehole reservoir engineer and then a domain champion. She holds an M.Sc. degree in petroleum geosciences and reservoir engineering from ENSG\, France. URL:https://www.dps-nl.org/wordpress/event/december-2021-meeting-subsurface-evaluation-for-nuclear-waste-storage/ LOCATION:Online Meeting ORGANIZER;CN="Dutch Petrophysical Society":MAILTO:info@dps-nl.org END:VEVENT BEGIN:VEVENT DTSTART;TZID=Europe/Amsterdam:20210909T153000 DTEND;TZID=Europe/Amsterdam:20210909T170000 DTSTAMP:20260517T073741 CREATED:20210908T144351Z LAST-MODIFIED:20210908T144351Z UID:690-1631201400-1631206800@www.dps-nl.org SUMMARY:Geothermal Energy – Drilling and Petrophysical Challenges DESCRIPTION:The next meeting of the Dutch Petrophysical Society will be held online on Thursday 9th September. \nThe theme of the meeting is Geothermal Energy – Drilling and Petrophysical Challenges and features two presentations. Abstracts and presenter biographies are detailed below. The virtual doors open at 15:30 with the meeting commencing at 16:00. \nBecause of the continuing COVID situation in the Netherlands\, the meeting will again be be conducted using GoToMeeting facilitated by the SPWLA. You can register at the following link: https://register.gotowebinar.com/register/116465086253088524 \nAs always\, thanks to the generosity of our sponsors\, attendance is free for members of the DPS. \nFinally\, for our next meeting in December\, we’re hoping that the COVID situation continues to stabilise. and depending on the outcome of the government press conference on 20th September\, we’re hopeful that we will be able to hold this in person\, followed by our traditional Christmas social. For the meeting we’re planning something special – a panel discussion on ‘The Future of Petrophysics’. More details on this to follow at the September meeeting. \nOf course\, If you no longer wish to receive emails from us\, please follow the link at the end of the message to remove yourself from the DPS mailing list. \nHope to see you at the meeting\, \nThe Dutch Petrophysical Society Board \n\nTalk 1 Upper Rotliegend Schlochteren Geothermal Exploitation. \nArjen Bok\, MWD Coordinator at Inco Drilling. \nAbstract \nDrilling\, Well-Design and Engineering solutions such as BHA design are often the best solution to challenging formation properties. Slight changes to the designs can usually have big results in steerability and well-bore integrity\, which in turn can result in faster drilling. \nMWD Telemetry optimization is also performed to ensure that data transfer will result in smooth Real-Time formation evaluation logs for improved efficiency. \nThis presentation will cover challenges encountered and modifications made while drilling two on-shore Geothermal projects in the West Netherlands Basin and the Central Netherlands Basin. Key points will be\, Well-Design and Engineering\, formation behavior while drilling\, lessons learned and the increase in performance after implementation. \nBiographical Details of the Speaker \nArjen Bok joined Inco Drilling in September 2018 and has been MWD Coordinator since September 2019. He previously worked at Scientific Drilling and has over 10 years operational experience in the oil\, gas and geothermal industries. \n\nTalk 2 Making “Geothermal Anywhere” a Reality: Addressing Technology Gaps and Needs. \nEric van Oort\, Professor of Petroleum Engineering and J.J. King Chair in Engineering\, University of Texas at Austin. \nAbstract \nGeothermal drilling and well construction has traditionally been restricted to areas with very high geothermal gradients (in the range of 50-100 oC/km) as encountered in areas with active volcanism\, along plate boundaries\, etc. Wells have typically not exceeded 5 km TVD\, and have been drilled with rather conventional drilling technologies. \nRecently\, however\, the idea of “Geothermal Anywhere” has attracted a lot of attention. This idea\, which can be pursued with both Engineered/Enhanced Geothermal Systems (EGS) and Closed Loop Geothermal Systems (CLGS\, also referred to as AGS)\, aims to drill functional geothermal wells anywhere on Earth\, where geothermal gradients average ~30 oC/km. This will require drilling deeper\, i.e. 7-10 km TVD\, and getting more reservoir access and exposure by drilling high deviation tangents and horizontal lateral sections at depth in rocks with very high compressive strengths (e.g. basalt\, gabbro and granite with 25\,000 – 50\,000 psi UCS). The significant associated challenge is then to drill cost-effectively in such a hard/abrasive rock environment at ultra/extreme HPHT conditions (temperatures in excess of 200 oC\, possibly going up to – and beyond – the critical point of water). \nThis presentation will outline where we are today in terms of meeting this challenge\, and how geothermal drilling can benefit from recent oil and gas drilling advances as well as some new insights. In addition\, it will touch upon the remaining gaps and needs that will need to be addressed in the areas of directional drilling tools and dynamics\, geomechanics and completions\, fluids and cementing\, MWD/LWD sensors and telemetry\, casing and their connections\, cost estimating\, and capitalizing on machine learning (ML) and artificial intelligence (AI). It will be shown that an integrated technology development approach will be necessary to effectively address these areas and make “Geothermal Anywhere” a reality in future. \nBiographical Details of the Speaker \nDr. Eric van Oort became Professor in Petroleum Engineering and J.J. King Chair in Engineering at the University of Texas at Austin in 2012\, after a 20-year industry career with Shell Oil Company. He holds a PhD degree in Chemical Physics from the University of Amsterdam. He has (co-)authored more than 200 technical papers\, holds 15 patents\, is a former SPE Distinguished Lecturer\, a SPE Distinguished Member\, and the 2017 winner of the prestigious international SPE Drilling Engineering Award. At UT Austin\, he directs drilling-related R&D in two industry consortia (RAPID and CODA) with over 25 industry company sponsors\, covering drilling automation & control\, sensor design\, big data analytics\, complex well construction challenges\, and well abandonment & decommissioning. Recently\, he has become involved in deep closed-loop geothermal drilling through UT’s new GEO initiative\, for which he is the technical lead. In addition\, he is the co-founder of 3 start-up companies\, including SPYDR Automation dedicated to drilling automation\, and is the CEO of his own consulting company\, EVO Energy Consulting. URL:https://www.dps-nl.org/wordpress/event/geothermal-energy-drilling-and-petrophysical-challenges/ LOCATION:Online Meeting END:VEVENT BEGIN:VEVENT DTSTART;TZID=Europe/Amsterdam:20210304T160000 DTEND;TZID=Europe/Amsterdam:20210304T173000 DTSTAMP:20260517T073741 CREATED:20210217T153642Z LAST-MODIFIED:20210217T153642Z UID:657-1614873600-1614879000@www.dps-nl.org SUMMARY:March 2021 DPS Meeting DESCRIPTION:The next meeting of the Dutch Petrophysical Society will be held online on Thursday 4th March\, The meeting will be conducted using GoToMeeting facilitated by the SPWLA. \nThe theme of the meeting is: \nBayesian Methods in Petrophysics \nWith two talks: \nTalk 1 – Petrophysical Evaluation of Thinly Laminated Depositional Sequences using Statistical Matching Procedures\nJoachin Ambia\, 3D UTAPWeLS Development Team\, University of Texas at Austin. \nTalk 2 Application of Probability Pruning by Filtering in Petrophysics. Is It Artificially Intelligent?\nMirano Spalburg\, Consultant. \nAbstracts for the talks are below. \nA link to register via SPWLA will be posted shortly. Alternatively register your interest below by entering your name and email. \nWe will also be announcing the candidates for the DPS board elections. All positions are up for election\, and interested members of the DPS are invited to express their interest by email to info@dps-nl.org. \nPositions up for election and current incumbents are listed below: \n\nPresident – Iulian Hulea (Shell)\nSecretary – Danijela Krizanic (Independent)\nVP Technology – Chris Harris (Independent)\nVP Communications and Publications – Tom Bradley (Baker Hughes)\nTreasurer – Paul Mast (SODM)\nYP Representatives – Abdul Hamid (EBN)\, Jan-Bart Brinks (Schlumberger)\nBoard members X3 – Marisa Sitta (Wintershall)\, Simon Smith (Halliburton)\, Igor Kim (Shell)\, Tracey Flynn\, Tarek El-Taraboulsi (Schlumberger)\, Morgane Bizeray (Baker Hughes)\n\nApplications close on 3rd March 2021 so that candidates can be announced in the Marh meeting. The election will be conducted online in May with the new board being announced at the AGM in June. Note that to be a DPS board member\, you have to be a full member of the SPWLA. \n\nTalk 1 – Petrophysical Evaluation of Thinly Laminated Depositional Sequences using Statistical Matching Procedures\nJoachin Ambia\, 3D UTAPWeLS Development Team\, University of Texas at Austin. \nAbstract \nConventional petrophysical evaluation techniques are unreliable to assess individual bed properties in laminated depositional sequences with beds thinner than the vertical resolution of standard logging tools. The main cause of this limitation is that well logs average formation properties across multiple interbedded intervals. Commonly used solutions are limited to shaly sandstone models to account for either presence of grain-coating clay in sandstones or laminated shale-sandstone systems. Other solutions rely on volumetric techniques which require subjective interpretation of shale and total porosity concentrations. Likewise\, it is usually assumed that both sandstone and shale properties remain constant within siliciclastic reservoirs\, which is not always the case in heterolithic bedding or in laminated sequences with strong diagenetic alterations. \nTo address this technical challenge\, we introduce an inversion workflow that reproduces measurements via analogues of thinly laminated reservoirs. We use a Markov-Chain Monte Carlo inversion algorithm to generate independent realizations of each petrophysical property. All petrophysical properties are combined to estimate probability histograms rather than reducing them to a single value for each petrophysical property. \nThe method is applied to a deep water heterolithic clastic sequence of grain-coating clay sandstones where bed thickness varies from 3 to 4 inches. In addition to conventional well logs\, high-resolution borehole images are used to detect bed boundaries. The statistical method is used to estimate total porosity\, water saturation\, and permeability based on the earth-model-derived properties. Finally\, net-to-gross and hydrocarbon pore volume are estimated using the calculated statistical properties. \nCompared to conventional interpretation procedures\, the formation evaluation method described here enables the incorporation of non-constant matrix and shale properties in the sandstone-shale laminated sequence\, and estimates individual layer properties and their uncertainties\, thereby reducing subjectivity in the interpretation of static and dynamic petrophysical properties of heterolithic clastic sedimentary sequences. \nBiographical Details of the Speaker \nJoaquin Ambia is currently the software development lead for the Formation Evaluation Joint Industry Research Consortium at the University of Texas at Austin. He holds a BS degree from the Instituto Tecnológico de Estudios Superiores de Monterrey in Mexico and a PhD in physics from the University of Houston. \nTalk 2 Application of Probability Pruning by Filtering in Petrophysics. Is It Artificially Intelligent?\nMirano Spalburg\, Consultant. \nAbstract \nLog evaluations to estimate formation properties such as porosity and saturation are often deterministic\, the uncertainty being estimated with a partial derivatives scheme or a Monte Carlo scheme around the calculated property values. Almost inevitably the results exhibit high sensitivity to evaluation parameters such as grain and fluid density and failure to acquire data for one of the logging tools used in the evaluation scheme can cause considerable concern. Uncertainty is usually only estimated in the neighbourhood of the calculated formation properties. In Bayesian uncertainty reduction\, by contrast\, a range of possible formation properties is defined by a (team of) specialists and subsequently reduced by one or more logging measurements. Procedures used to implement this\, such as inversion through Markov Chain Monte Carlo sampling\, are typically computationally intensive\, but the full uncertainty in the results is captured. \nThe subject of this presentation is an alternative Bayesian method in which all relevant uncertainties in formation properties\, and their importance for the result of the evaluation\, are defined at the outset and used to generate a large set of synthetic formations together with the responses of various logging tools to these synthetic formations. This synthetic data can be used to generate histograms and cross-plots to validate that the uncertainties defined at the outset have been correctly incorporated. The data set is then reduced\, or “pruned” by using the results of available logging measurements\, together with prescribed uncertainties in these measurements. The Bayesian inference is thus reduced to a filtering operation using measured tool data to select elements from a large data set with all relevant and possible combinations of formation properties and associated logging tool responses. \nThe method has been extensively tested and applied to logging data from UK and NL clastic environments and some of the results\, and lessons learned during the evaluations\, are shared in this presentation. It is less computationally intensive than the MCMC method referred to above and has been cast in the form of a Javascript module\, which can be run on a year 2020 mid-range home/game PC\, or even on a high-end smartphone. The method appears to require only moderate expert guidance and may indicate it is a step towards petrophysical artificial intelligence. \nBiographical Details of the Speaker \nMirano Spalburg is retired. He enjoyed working for Shell as a petrophysics assurer\, a studies and operational petrophysicist and as a researcher over a 30+ years period. He has a PhD in Mathematics and Physics and an almost lifelong affection for Bayesian methods. URL:https://www.dps-nl.org/wordpress/event/march-2021-dps-meeting/ LOCATION:Online Meeting ORGANIZER;CN="Dutch Petrophysical Society":MAILTO:info@dps-nl.org END:VEVENT BEGIN:VEVENT DTSTART;TZID=Europe/Amsterdam:20201203T150000 DTEND;TZID=Europe/Amsterdam:20201203T170000 DTSTAMP:20260517T073741 CREATED:20201123T074303Z LAST-MODIFIED:20201130T150906Z UID:623-1607007600-1607014800@www.dps-nl.org SUMMARY:DPS December 2020 Meeting DESCRIPTION:Dear Fellow Members of the DPS\, \nThe next meeting of the Dutch Petrophysical Society will be held on Thursday 3rd December. Though the format remains virtual\, using GoToMeeting facilitated by the SPWLA\, we will resume our normal practice of having two presentations. The virtual doors open at 15:00 with the meeting commencing at 15:30. \nThe theme of the meeting is Petrophysical Applications of NMR \nDetails of the talks are below. To register your attendance\, please click the GoToMeeting registration link below: \nhttps://attendee.gotowebinar.com/register/8224606871684384268 \nTalk 1 Investigation of Physical Properties of Hydrocarbons in Unconventional Mudstones using Two-Dimensional NMR Relaxometry. Harry Xie\, Corelab \nAbstract \nUnderstanding of organic matter properties is crucial in characterization of unconventional plays. It is always a challenge for petrophysicists to differentiate and quantify mobile and immobile hydrocarbons in unconventional mudstones. High frequency (22MHz) NMR for unconventional rock core analysis has gained industry acceptance for its high efficiency and high sensitivity to measure very small volumes of fluids and solid hydrocarbons in tight rocks. Previous work has revealed that one-dimensional (1D) NMR T2 method is insufficient to study organic matters in fresh core samples due to overlapping T2 signals from both hydrocarbons and water. Co-existence of structurally bound water and solid hydrocarbons in shales leads to short T2’s in microseconds range\, and further complicates the situation. \nIn this work\, we present the first detailed analysis method using the two-dimensional (2D) NMR T1-T2 mapping techniques to study physical properties of hydrocarbons in various shale rocks. Combined NMR pulse sequences were used to acquire signals from solids and liquids that contain hydrogen. The 2D T1-T2maps were further processed by removing the map regions which are from water to obtain 1D T2 distributions for hydrocarbons only. Measurements on mudstone core samples at various temperatures\, from 22 °C to 90 °C\, show that the relaxation time T2’s of hydrocarbon components increase with temperature due to molecular mobility increasing but at different rates\, implying that hydrocarbons present in different environments (e.g.\, organic and inorganic pores) within these tight core samples are undergoing different thermal dynamics processes. T2 of each hydrocarbon component as a function of temperature were analyzed to calculate the activation energy (Ea) based on the Arrhenius equation for molecular kinetics\, and producibility is then estimated accordingly. \nThis NMR method provides petrophysicists with a powerful way to study hydrocarbons that are confined in organic matter such as bitumen and kerogen to understand the mechanism of enhanced oil recovery (EOR) in unconventional reservoirs. Furthermore\, results from such NMR relaxometry analysis and multiple-heating rate pyrolysis indicate that the combined techniques are very promising for investigating producible estimates from the free/adsorbed hydrocarbons present in source-reservoir intervals. Such an alternative approach leads to an analytical protocol for the determination of NMR cut-offs to quantify mobile and immobile hydrocarbons. \nBiographical Details of the Speaker \nZonghai Harry Xie is NMR Senior Advisor at Core Laboratories. He received his PhD in Physics from the University of Kent at Canterbury\, UK\, in 1994 and worked as a research fellow for both the University of Surrey and the University of Kent on an industrial project to build an on-line NMR system for quality control purposes. Dr. Xie has spent several years working as Product Specialist to develop and support laboratory NMR products (MARAN product line) at Resonance Instruments Ltd. He has also spent time at Bruker as Senior Applications Scientist in the Time Domain NMR division\, Technical Director of the Time Domain products for Asia Pacific\, and General Manager of Bruker Optics China. Dr. Xie has been focusing on developing new NMR techniques for unconventional mudstones since he joined Core Lab in November 2012. He was an SPWLA distinguished speaker for 2019-2020. \nTalk 2 Wireline NMR Combined with Azimuthal Logs Define Flow Capacity and Homogeneity within a High-Angle Geothermal Well. Chiara Cavalleri\, Schlumberger \nAbstract \nForthcoming \nBiographical Details of the Speaker \nChiara Cavalleri is an EH Petrophysics Domain Champion with Schlumberger\, having spent 15 years working for the company and its subsidiaries at various locations in Europe and Africa. Prior to that she worked as a project coordinator and environmental engineer for Foster Wheeler. She holds a PhD in environmental engineering from the University of Pavia. URL:https://www.dps-nl.org/wordpress/event/dps-december-2020-meeting/ LOCATION:Online Meeting ORGANIZER;CN="Dutch Petrophysical Society":MAILTO:info@dps-nl.org END:VEVENT BEGIN:VEVENT DTSTART;TZID=Europe/Amsterdam:20200924T153000 DTEND;TZID=Europe/Amsterdam:20200924T170000 DTSTAMP:20260517T073741 CREATED:20200907T141449Z LAST-MODIFIED:20200909T120208Z UID:612-1600961400-1600966800@www.dps-nl.org SUMMARY:DPS September 2020 Meeting DESCRIPTION:The next meeting of the Dutch Petrophysical Society will be held on Thursday 24th September. The virtual doors open at 15:30 with the talk commencing at 16:00. \nVirginie Schoepf from Openfield Technology will present a talk on Flow Regime Diagnostic in Producers and Injectors using Ultrasonic Doppler Sensors \nAs COVID-19 is still with us\, as before we’ll be meeting virtually using GoToMeeting. Please register for the meeting here. The link to join the meeting will be sent via email to all registered attendees shortly before the meeting \nHope to see you on Thursday 24th September. \nAbstract \nStandard and newer generation spinners operating in low velocity environments are often limited to detect small entries if their thresholds are greater than fluid movement. Conversely\, fluid viscosity\, density and even more significantly possible contamination of spinner jewel bearings with solid particles (paraffin\, sand) may as well impede the rotation of the propellers’ blades. Furthermore\, harsh logging conditions can also lead to loss of propellers. In these situations\, an alternative measurement to diagnose flow regimes and inform about in situ fluid velocities is required. \nA novel flow diagnostic measurement based on Doppler physics has been developed. The measurement does not require direct contact between the borehole fluid and the sensing element\, inhomogeneities inside the fluid being detected by multiple ultrasonic transducers. The sensor operates from very low to high velocity flow but is dependable on the presence of inhomogeneities (fluid bubbles\, solid particles\, turbulences..). The ultrasonic Doppler sensors can be mounted on the axis of a compact array tool string or independently from each other for instance as an array of sensors with use of elongated probe design. The very short tool string will typically carry auxiliary measurements (Pressure\, Temperature\, Holdup\, MML(CCL)\, Tool Orientation and Deviation\, Spinner). \nAfter a brief presentation of the sensor technology and physics\, applications of Doppler physics from lab experiments and in situ well data alongside production logging sensors illustrate how that alternative measurement can complement the flow diagnostic and make it more accurate. We will show how recent progress in spectrum recording has led to improving the extraction of Doppler measurements as well as our understanding of in situ flow conditions. Limits as well as benefits of the measurements will be discussed. \nBiography \nVirginie Schoepf is a senior petrophysicist in Openfield Technology and is a member of the SPE. Virginie started her career with Schlumberger as a development engineer in France and later moved to a log analyst role in production petrophysics. She held the position of petrophysicist at Neptune Energy and BP. She holds an MS degree in geophysics from Ecole de Physique du Globe de Strasbourg. URL:https://www.dps-nl.org/wordpress/event/dps-september-2020-meeting/ LOCATION:Online Meeting ORGANIZER;CN="Dutch Petrophysical Society":MAILTO:info@dps-nl.org END:VEVENT BEGIN:VEVENT DTSTART;TZID=Europe/Amsterdam:20200604T160000 DTEND;TZID=Europe/Amsterdam:20200604T190000 DTSTAMP:20260517T073741 CREATED:20191014T154712Z LAST-MODIFIED:20200604T065553Z UID:485-1591286400-1591297200@www.dps-nl.org SUMMARY:DPS June 2020 Meeting and AGM DESCRIPTION:We will be holding the DPS June meeting and AGM on Thursday 4th June 2020. Because of the current restrictions we’ll be holding this as an online virtual meeting: The link will be sent to all registered attendees close to the date. \nDoors open at 15:30 with the talks beginning at 16:00. Followed by a virtual social hour\, though you’ll have to supply your own refreshments this time! \nSPWLA Distinguished Lecturer Bo Gong will be presenting her talk: \n“Estimating Net Sand From Borehole Images in Laminated Deepwater Reservoirs With A Neural Network”. \nThe talk abstract and Bo’s biography is below. \nTo join the meeting\, register here . Once registered you will be sent a direct link to join. As always attendance is free for DPS members. \nHope to see you on 4th June. \nAbstract: \nDeepwater reservoirs often consist of highly laminated sand-shale sequences\, where the formation layers are too thin to be resolved by conventional logging tools. To better estimate net sand and hydrocarbon volume in place\, one may need to leverage the high resolutions offered by borehole image logs. Traditionally\, explicit sand counting in thin beds has been done by applying a user-specified cutoff on a 1D resistivity curve extracted from electrical borehole images. These workflows require multiple preprocessing steps and log calibration\, and the results are often highly sensitive to the cutoff selection\, especially in high-salinity environments. \nThis paper presents a new method that estimates sand fractions directly from electrical borehole images without extracting an image resistivity curve or applying any preselected cutoffs. The processing is based on an artificial neural network\, which takes the 2D borehole image array as input\, and predicts sand fractions with the measurements from all button electrodes. A cumulative sand count can be computed after processing the borehole image logs along an entire well by summing up the estimated net sands. The neural network is trained and tested on a large dataset from wells in a deepwater reservoir with various degrees of laminations\, and validated with sand fractions identified from core photos. Upon testing\, a good match has been observed between the prediction and the target output. The results were also compared against another sand-counting method based on texture analysis\, and showed advantages of yielding unbiased estimations and a lower margin of error. \nBio: \nBo Gong is a research petrophysicist with Chevron ETC. She received her Ph.D. degree in Electrical Engineering from the University of Houston in 2014. Her research interests include borehole imaging technologies\, image processing\, and interpretation techniques\, and electromagnetic logging tool modeling. URL:https://www.dps-nl.org/wordpress/event/20200604/ LOCATION:Online Meeting ORGANIZER;CN="Dutch Petrophysical Society":MAILTO:info@dps-nl.org END:VEVENT BEGIN:VEVENT DTSTART;TZID=Europe/Amsterdam:20200305T160000 DTEND;TZID=Europe/Amsterdam:20200305T190000 DTSTAMP:20260517T073741 CREATED:20191014T154639Z LAST-MODIFIED:20200213T212852Z UID:483-1583424000-1583434800@www.dps-nl.org SUMMARY:March 5th DPS Meeting - Petrophysics\, Digitalization & Machine Learning DESCRIPTION:We will be holding the DPS March meeting at KIVI on Thursday 5th March 2020. Doors open at 15:30 with the talks beginning at 16:00. Followed by drinks at one of our usual haunts. \nThe topic of the meeting is ‘Petrophysics\, Digitalization & Machine Learning’ with two talks from Daria Lazareva from CGG GeoSoftware and Stefano Pruno from Stratum Reservoir. The abstracts are below. \nTo register\, either register using the link below\, or send a mail to info@dps-nl.org with your details. As always attendance is free for DPS members. \nHope to see you on 5th March \nMachine Learning for Better Wells. Daria Lazareva\, Technical Advisor – Petrophysicist at CGG GeoSoftware. \nAs data becomes more and more abundant\, machine learning is rapidly becoming a\nstandard technology in the oil and gas industry\, driving more effective methods and introducing tools and theories for discovering\, modelling and extracting patterns and relationships embedded in large datasets. Reservoir properties can be determined faster and more accurately and using a new generation of analytics and prediction techniques from machine learning.\n \nToday\, machine learning can address complex petrophysical and reservoir engineering challenges by automating mundane routine tasks such as modelling missing log curves and use data clustering for facies classification essential for seismic reservoir characterization or automatically identifying and flagging poor-quality log curves in a project. \nThis presentation focuses on machine learning for petrophysical data. Its potential to improve understanding of wells\, reservoir and producing fields is virtually unlimited\, and to some extent\, it all begins with well log data. We show some of the available workflows for Unsupervised Facies classification and Automated Log editing. For data clustering\, we use environmentally corrected\, normalized and depth-shifted data to ensure valid interpretation results. We also discuss leveraging machine learning for synthetic log generation using deep machine learning. \nThe Quest for Big Data – A New Frontier for Machine Learning Application: The Norwegian Cuttings Digitalization Project. Stefano Pruno\, Stratum Reservoir Regional Technical Advisor for Core Analysis. \n In the new digital era where the quest for Big Data has become paramount\, the Norwegian oil industry and academic community has decided to spearhead the approach to Machine Learning challenges. \nThis DPS short talk will present the Norwegian Released Wells cuttings digitalization project and be mainly focused on the objectives\, advantages and limitations related to this specific program. \nThis is a bold initiative in a collective research and development effort to create one unbiased database to train and develop specific artificial neural networks and algorithms.\nWill the controversial cooperation between human and artificial intelligence be a success in the future scientific re-evolution…? I guess we will all see as the near future\, for now\, is still uncertain. URL:https://www.dps-nl.org/wordpress/event/20200305/ LOCATION:KIVI\, Prinsessegracht 23\, Den Haag \, 2514 AP ORGANIZER;CN="Dutch Petrophysical Society":MAILTO:info@dps-nl.org END:VEVENT BEGIN:VEVENT DTSTART;TZID=Europe/Paris:20181206T153000 DTEND;TZID=Europe/Paris:20181206T173000 DTSTAMP:20260517T073741 CREATED:20181002T120630Z LAST-MODIFIED:20181214T141555Z UID:394-1544110200-1544117400@www.dps-nl.org SUMMARY:LWD Cement Evaluation and Depth Measurement Uncertainty. December 6 2018. DESCRIPTION:Date & Time: December 6\, 15:30-19:00 CET (click to add to calendar)\nVenue: KIVI Prinsessegracht 23\, 2514 AP Den Haag (click for map)\nPlease Click to email with RSVP to info@dps-nl.org 1 day before event latest. \nPDF for printing \nAgenda\nCement Evaluation with LWD Sonic: methodology description and comparison to conventional cement evaluation. (click for PDF)\n \nMarcelo Cecena\, Schlumberger \nHistorically\, LWD Sonic has struggled to provide quantitative cement evaluation due to the interference between casing and LWD collar signals. However\, recent developments in tool design provide significant attenuation to collar signals\, lowering the interference effect and allowing the reliable use of casing signal to quantify cement bond. The methodology presented uses a summation model approach to analyze the attenuation of the casing and tool collar signal along an array of receivers from an LWD sonic tool\, to extend the quantitative cement evaluation to the full range of bond index applicable in all types of casing and cements (Pistre et al.\, 2015). The results are compared to Wireline CBL to demonstrate the potential and limitations as an alternative to conventional cement evaluation. \n  \nAlong-hole Depth Measurement And Reducing Uncertainty. (click for PDF)\n \nHarald Bolt\, ICT \nAlong-hole depth has remained a measurement disciple that most recognize as being important and necessary to get right. But it is invariably taken for granted\, unless it is “wrong”. But few actually know what “right” means. And fewer understand where the responsibility for the success of the measurement lies. The along-hole depth presentation includes defining this responsibility\, as well as a discussion of the measurement process\, the correction methodology and the numerics\, and how these can affect uncertainty of measurement results. The Way-point correction model will be explained\, applicable to both wireline and drill pipe depth determination\, and an example with be presented where the use of Driller’s Way-point Depth (patent applied) arrived at quantified uncertainty for drill pipe derived formation depths. \n  \n\nAs usual all have an opportunity to socialise with fellow petrophysical professionals over drinks and snacks @ Café 2005\, Denneweg\, Den Haag \nDoors will open for registration and coffee at 3:30 pm and the talks will commence at 4:00 pm. The social hour will begin at 6:00pm. URL:https://www.dps-nl.org/wordpress/event/topic-lwd-upcoming-december-6th-2018-meeting/ LOCATION:KIVI\, Prinsessegracht 23\, Den Haag \, 2514 AP ORGANIZER;CN="Dutch Petrophysical Society":MAILTO:info@dps-nl.org END:VEVENT BEGIN:VEVENT DTSTART;TZID=Europe/Paris:20180920T153000 DTEND;TZID=Europe/Paris:20180920T190000 DTSTAMP:20260517T073741 CREATED:20180905T120807Z LAST-MODIFIED:20180921T093615Z UID:351-1537457400-1537470000@www.dps-nl.org SUMMARY:DPS presents: QI and Geomechanics DESCRIPTION:Date & Time: September 20\, 15:30-19:00 CET (click to add to calendar)\nVenue: KIVI Prinsessegracht 23\, 2514 AP Den Haag (click for map)\nPlease Click to email with RSVP to info@dps-nl.org before 19th Sep 2018 \nPDF for printing \nAgenda\nSponsored by: \n \nOpening by President Iulian (click for PDF) \nQuantitative Interpretation of Sonic Compressional and Shear Logs for Gas Saturation in Medium Porosity Sandstone (click for PDF) \nMaciej Kozlowski\, Halliburton \nGassmann equations (Gassmann\, 1951) are used to calculate seismic velocity changes that result from variations in reservoir fluid saturation. These equations became predominant in the analysis of a direct hydrocarbon indication from seismic data through their use in analyzing the compressional to shear velocity ratio\, Vp/Vs. This Vp/Vs ratio is used in many industry analyses\, such as the amplitude variation with offset (AVO) analysis developed by Castagna et al. (1993). Multiple authors have since published a variety of Vp/Vs seismic interpretation techniques that use empirical relationships with Vp\, Vs\, and porosity terms. Unfortunately\, however\, there is a gap in the use of Vp/Vs relationships in petrophysical interpretation. \nRock-physics Anisotropy and its Applications in Geomechanics (click for PDF)\nSergey Vorobiev\, Wintershall\, Germany \nRecent years more and more complex wells have been drilled\, quite often through depleted formations. NPT due to losses or stuck events can have significant impact on the project economics. Comprehensive geomechanical model can highlight potential hazards and allow to take early actions to mitigate issues. \nElasticity and particularly its anisotropy is a vital part of the comprehensive geomechanics model. As it will be shown\, it has dramatic impact on the horizontal stresses profiles. Presentation demonstrates anisotropic elasticity modeling process. \nThe suggested workflow exploits Reuss\, Upper and Lower Hashin-Shtrikman bounds for various cases of dispersed clay modeling. Each of the bounds corresponds to specific dispersed clay textures\, like clay cementation\, pore filling etc. These textures are classified and tied to the corresponding bounds.The rock anisotropy is modeled by Backus averaging of shaly sands with dispersed clay as a first component and laminated clay as a second component. The degree of anisotropy is controlled by the volume of laminated clay and its elastic moduli. The model is calibrated through several rock-physics cross-plots. The most optimal way is to calibrate model with measured velocities in vertical and horizontal wells. Other options like Stoneley wave driven horizontal shear velocity\, calibration with core etc. and its pitfalls will be discussed as well. Typically\, the strain response of the rock and the associated velocity changes is measured in pore depletion experiments. The velocity is determined by analyzing the first arrival of a transmitted ultrasonic wave. The relation between velocity changes and strain is generally well explored and understood. We propose a method for the monitoring of the deformation using the diffuse field\, that is to say\, focusing on the coda wave of the transmitted ultrasonic wave. Cross correlation analysis of the coda part returns higher order of information associated with inelastic changed in the medium. The applications are diverse and range from civil engineering\, to seismology and reservoir monitoring. \n\nAs usual all have an opportunity to socialise with fellow petrophysical professionals over drinks and snacks. \nDoors will open for registration and coffee at 3:30 pm and the talks will commence at 4:00 pm. The social hour will begin at 5:30pm. URL:https://www.dps-nl.org/wordpress/event/dps-presents-qi-and-geomechanics/ LOCATION:KIVI\, Prinsessegracht 23\, Den Haag \, 2514 AP ORGANIZER;CN="Dutch Petrophysical Society":MAILTO:info@dps-nl.org END:VEVENT BEGIN:VEVENT DTSTART;TZID=Europe/Amsterdam:20180628T153000 DTEND;TZID=Europe/Amsterdam:20180628T190000 DTSTAMP:20260517T073741 CREATED:20180608T114007Z LAST-MODIFIED:20180918T084331Z UID:318-1530199800-1530212400@www.dps-nl.org SUMMARY:Rock Physics - 28-June-2018 DESCRIPTION:Date & Time: June 28\, 15:30-19:00 CET (click to add to calendar)\nVenue: KIVI Prinsessegracht 23\, 2514 AP Den Haag (click for map)\nPlease Click to email with RSVP to info@dps-nl.org before 27th June 2018 \nPDF for printing \nAgenda\nAcoustic signature of deformation in the lab\nDr. Aletta (Nikoletta) Filippidou\, Shell\, The Netherlands \nTypically\, the strain response of the rock and the associated velocity changes is measured in pore depletion experiments. The velocity is determined by analyzing the first arrival of a transmitted ultrasonic wave. The relation between velocity changes and strain is generally well explored and understood. We propose a method for the monitoring of the deformation using the diffuse field\, that is to say\, focusing on the coda wave of the transmitted ultrasonic wave. Cross correlation analysis of the coda part returns higher order of information associated with inelastic changed in the medium. The applications are diverse and range from civil engineering\, to seismology and reservoir monitoring. \nBiography\nDr. Aletta (Nikoletta) Filippidou is a geologist\, turned geophysicist\, turned petrophysicist\, turned geomechanicist; she basically abuses rocks\, that’s it. She did her MSc jointy in the University of Athens and NTNU in Trondheim\, and then a PhD in Geophysics at TUDelft. During her PhD she designed\, acquired\, processed and interpreted 3D seismic experiments of a Jurassic siliciclastic sequence in Northern France and a Miocene carbonate prograding reef in Mallorca using high-resolution high-frequency portable seismic sources. Her PhD thesis was ultimately on multi-scale transmission measurements\, focusing on scattering and attenuation of seismic waves. She works for Shell since 2006\, and focused on carbonate reservoirs\, mostly in the Middle East for 10 years. The last two years she works for the Earthquake Study Team for NAM largely as a research coordinator and project manager\, but also squeezing some time for own research within the Rock and Fluids Lab at Shell and TUDelft. \n  \nRock Physics Integration: from Petrophysics to Simulation\nDr. Reza Saberi\, CGG\, The Netherlands\n \nThe science of rock physics creates a bridge between elastic properties (e.g. Vs/Vp\, seismic\, elastic moduli etc.) and reservoir (e.g. porosity\, saturation\, pressure etc.) and architecture (e.g. laminations\, fractures etc.) properties. It also should allow for a reliable prediction and perturbation of seismic response with changes in reservoir conditions. An appropriate rock physics model should be consistent with the available well and core data\, and surface and borehole seismic as well as production and reservoir engineering figures. This requires that rock physics act as an integrating tool between different disciplines. This talk review rock physics applications in different subsurface disciplines like Petrophysics\, Geophysics\, Geomechanics and Reservoir engineering. \nBiography\nReza has been with CGG since 2011 and has more than 15 years of experience working in the oil and gas industry. He first started as a mining exploration engineer in Iran and then moved to the oil and gas industry as a geoscientist\, geophysicist and rock physicist. He has been working with NIOC\, Shell\, Fugro-Robertson\, Fugro-Jason and CGG in different roles in Iran\, Norway and Netherlands. His most recent role is as Rock Physics Product Development Manager where he leads a team that develops different rock physics modules within the CGG GeoSoftware portfolio. He is also involved with different rock physics R&D projects in CGG and gives worldwide training on rock physics and its practical link with other subsurface disciplines. Reza holds a M.Sc. in Petroleum Geosciences\, NTNU\, Trondheim\, Norway and a Ph.D. in Reservoir Geophysics and Rock Physics from the University of Bergen\, Bergen\, Norway. \n  \n\nAs usual all have an opportunity to socialise with fellow petrophysical professionals over drinks and snacks. \nDoors will open for registration and coffee at 3:30 pm and the talks will commence at 4:00 pm. The social hour will begin at 5:30pm at Cafe 2005 (Denneweg 7F\, 2514 CB Den Haag). URL:https://www.dps-nl.org/wordpress/event/rock-physics-28-june-2018/ LOCATION:KIVI\, Prinsessegracht 23\, Den Haag \, 2514 AP ORGANIZER;CN="Dutch Petrophysical Society":MAILTO:info@dps-nl.org END:VEVENT BEGIN:VEVENT DTSTART;TZID=Europe/Amsterdam:20180308T153000 DTEND;TZID=Europe/Amsterdam:20180308T190000 DTSTAMP:20260517T073741 CREATED:20180212T165853Z LAST-MODIFIED:20180918T084936Z UID:293-1520523000-1520535600@www.dps-nl.org SUMMARY:March 8\, Geothermal Petrophysics DESCRIPTION:Date & Time: March 8\, 15:30-19:00 CET\,  KIVI Den Haag \nClick to RSVP. \nPDF for printing \nFree entrance as usual. \nLaboratory research efforts on geothermal engineering at TU Delft \nRichard Bakker\, TU Delft\, The Netherlands \nResponding to an increased demand for clean\, green\, carbon-neutral energy\, the Dutch ministry of economic affairs signed a “Green Deal”\, aimed to extract geothermal heat at depths below 4000 m which brings with it some new geotechnical challenges.  A number of examples of current laboratory research at TU Delft will be shown including a deep porous sandstone and fractured reservoirs. In addition\, research on Radial Jet Drilling (RJD) is presented. This technique is likely to provide better control on enhanced flow paths in geothermal settings. It requires less fluids compared to conventional hydraulic stimulation techniques\, thereby reducing the risk of induced seismicity . \n  \nDr. Richard Bakker is an experimental rock mechanics specialist working at the TU Delft rock mechanics laboratory within the Geothermal Engineering group of Prof. David Bruhn. He works as a Post-doc within the EC funded Horizon2020 project ‘SURE’\, which focusses on Radial Jet Drilling (see: http://www.sure-h2020.eu/). He did his MSc at Utrecht university in Geology and Geophysics and wrote a thesis about paleomagnetism and uplift rates of the island of Timor\, SE Asia. His PhD was at ETH Zürich in the Structural Geology group\, where he worked on the mechanical properties of rocks in volcanic settings using a high pressure and temperature deformation apparatus (Paterson apparatus\, max 1200 ˚C\, 500 MPa). His thesis focused primarily on basalts and carbonates found in the basement of Mt. Etna. \n  \n  \nPetrophysics in geothermal exploration in The Netherlands \nBart van Kempen\, TNO\, The Netherlands \nReservoir evaluation plays a major role in the exploration of geothermal reservoirs. The chance of success of a hydrocarbon prospect is dependent on the water saturation\, while the most critical parameter in geothermal exploration is the transmissivity. In conventional reservoirs the net thickness is usually relatively easy to determine and the uncertainty will often be quite narrow. Reservoir permeability on the other side is one of the properties hardest to predict. Part of our work at TNO-AGE concerns calculating the expected geothermal power at various scales (national to local). As permeability and net reservoir thickness are the most critical factors in these calculations\, we combine and compare all available data to improve estimates and reduce uncertainty. Multiple data sources and scales implies a certain complexity which will be highlighted and discussed in this presentation.  \nBart has a background in geology\, core analysis and petrophysics with well over 5 years experience. He  is currently working for TNO-AGE\, the advisory group for the Ministry of Economic Affairs and Climate (MEA) as cluster leader Geothermal energy. His technical work comprises geoscience work on geothermal related issues in support of compiling evaluation reports and advises to the MEA pertaining to: licence applications\, financial support measures and policy support. His specialisation is\, reservoir characterization of geothermal aquifers. Therefore\, his work focuses on petrophysics\,  well testing interpretation and production evaluation. URL:https://www.dps-nl.org/wordpress/event/march-8-geothermal-petrophysics/ LOCATION:KIVI\, Prinsessegracht 23\, Den Haag \, 2514 AP ORGANIZER;CN="Dutch Petrophysical Society":MAILTO:info@dps-nl.org END:VEVENT BEGIN:VEVENT DTSTART;TZID=Europe/Amsterdam:20171207T153000 DTEND;TZID=Europe/Amsterdam:20171207T190000 DTSTAMP:20260517T073741 CREATED:20171106T101936Z LAST-MODIFIED:20171205T142129Z UID:247-1512660600-1512673200@www.dps-nl.org SUMMARY:Pre-Abandonment Logging and Well Integrity\, 7th Dec 2017 DESCRIPTION:Highlight: Social hour (or longer 🙂 ) starting at 17:30 will be at Le Café Hathor\, Maliestraat 22. Which is only 5 min walk from KIVI and it is open bar till we run out of money. \n \nFree entrance generously sponsored by Shell \n \n\n‘The Sound of Silence’ : Innovative Approach to Confirm Barriers Using Spectral Noise logging  \nby Gulfiia Ishmukhametova\, NAM \nAbstract\nAfter initial plug and abandonment activities in one reservoir\, measurements showed pressure build up in the annuli. Spectral noise\, high precision temperature and production logging were performed to determine the cause of sustained annulus pressure and the location of leaks. The data acquisition was performed both under shut-in and pressure bleed-off conditions and both log responses were compared to identify changes in noise patterns. The noise from specific events such as channeling or reservoir activity was detected\, so the abandonment program could remediate these issues successfully.\nApplication of spectral noise logging in this field yielded evidence that this technology can identify annulus flow for very minor build-up rates (0.1 bar/day). Our work demonstrates the ability to locate the source behind multiple barriers and to validate plug integrity. It was observed that noise responses have a good correlation with ultrasonic cement evaluation logs aiding better understanding of the gas migration mechanism and change in noise patterns. \nBiography\nCurrently Gulfiia is associate Subject Matter Expert for Abandonment Logging at Shell. In her current role she is providing Petrophysical support to Development\, WRFM\, Exploration in Land Asset and Asset Groningen in NAM. Gulfiia is a petrophysicist with over 10 years of experience in LWD/WL data acquisition\, interpretation\, petrophysical modeling\, structural/ geomechanical analysis with wide operational experience\, who spent considerable time in interpretation of complex clay-rich sandstone formations\, carbonates\, tight gas and unconventional source rocks\, as well as complex clastic\, carbonate and unconventional fields of Russia\, Brasil\, USA (Eagleford Shale)\, Barents Sea\, UAE\, the Netherlands (Area West\, North\, Groningen). Prior to joining Shell Gulfiia accumulated vast experience working for major service companies (Schlumberger\, Halliburton) which provided her with deep knowledge in processing\, interpretation and operations of all types of logging tools\, including NMR\, FMI\, Spectrometry\, Acoustic. Gulfiia’s has graduated with Honors as Master of Mathematical Modelling of Processes in Petroleum Refining from Ufa State Petroleum Technology University (Russian Federation). \n\nEmploying acoustic impedance properties and flexural wave imaging in annular material characterization \nby Kamaljeet Singh – Schlumberger \nAbstract\nWorldwide\, government and regulatory officials are informing the oil & gas industry that unproductive wells must be sealed to permanently remove these potential environmental threats. Services companies are developing tools and methods to limit the economic impact of fulfilling these obligations. A crucial requirement of permanent abandonment procedure is the placement of a cement plug across the wellbore and in the annuli of remaining casing sections in the well once upper sections have been successfully cut and pulled out.\nThis presentation aims to demonstrate the use of a multi sensor wireline tool to characterize annular material based on acoustic impedance properties and flexural wave imaging. This data is used to confirm annular barrier\, support casing cut and pull optimization and evaluate Perforate\, Wash & Cement (PWC) P&A technique. \nBiography\nKamaljeet Singh has 20 years of Schlumberger Wireline experience in UAE\, India\, Sudan\, Nigeria and the UK including the last 10 years as Well Integrity and Production Logging Domain Champion. He currently works in UK where he was involved in multiple Plug & Abandonment projects in the North Sea. \n\nAs usual all have an opportunity to socialise with fellow petrophysical professionals over drinks and snacks. \nDoors will open for registration and coffee at 3:30 pm and the talks will commence at 4:00 pm. The social hour will begin at 5:30pm. This time our social hour shall have a extra pleasant twist to it. Stay tuned for updates. \nThanks to the generosity of our sponsors\, attendance will again be free. However please RSVP before 6th of December 2017 by sending an email to info@dps-nl.org with your name\, position and affiliation. \n\nPDF for printing URL:https://www.dps-nl.org/wordpress/event/pre-abandonment-logging-and-well-integrity-7th-dec-2017/ LOCATION:KIVI\, Prinsessegracht 23\, Den Haag \, 2514 AP ORGANIZER;CN="Dutch Petrophysical Society":MAILTO:info@dps-nl.org END:VEVENT BEGIN:VEVENT DTSTART;TZID=Europe/Amsterdam:20170913T153000 DTEND;TZID=Europe/Amsterdam:20170913T190000 DTSTAMP:20260517T073741 CREATED:20170824T133023Z LAST-MODIFIED:20170908T051209Z UID:198-1505316600-1505329200@www.dps-nl.org SUMMARY:Value of Information\, September 2017 Meeting DESCRIPTION:Value Of Information (click for pdf)\n13 September 2017 @ 3:30pm – 7:00pm \nFree Entrance \nGenerously Sponsored by Baker Hughes\, a GE Company\n \n\n  \nValue of Information – Data acquisition trends and learnings\nAbdul Hamid\, EBN\nData acquisition is an essential part of the exploration and development phase of a project. Data has its highest value when obtained in the exploration phase of a project where the aim is to reduce uncertainties as much as possible. Due to the low oil price many exploration projects are cancelled or deferred. Those projects which are approved are challenged with keeping the costs as low as possible.\nEBN is in the unique position to see the trends of data acquisition in the recent years and the value of the information taken from data acquisition. To emphasize these trends a data analysis is done on almost 20 exploration wells of the past 5 years. Since EBN is partner in almost all oil and gas wells in the Netherlands\, it has a great overview of the logging strategies of the operators and their post-mortem challenges. Hence EBN is encouraging a basis set of logging measurements in exploration wells as a best practice for the Dutch Oil and Gas industry. \nBiography \nAbdul works as a petrophysicist at EBN\, the Dutch Oil and Gas State company\, since 2014. Since EBN participates in almost all oil and gas fields in the Netherlands\, Abdul is responsible for the Petrophysics of all incoming wells. He has worked on different petrophysical projects and studies from different operators. As part of his cross posting he joined Oranje Nassau Energie (ONE) in May 2016 for a period of 4 months to work together with their petrophysical team on the M07-B Scruff reservoir. Earlier this year Abdul joined the Dutch Petrophysical Society as a Young professional where he has the ambition to engage more students and Young professionals in DPS’ events. Abdul holds a BSc degree in Applied Earth Sciences from TU Delft and an MSc degree in Petroleum Engineering from Heriot-Watt University. \n\nValue of information analysis impact on data acquisition programs\nby Jean-Paul Koninx\, Shell\nIn a time of lower oil prices and cost reductions\, data acquisition programs are under pressure. They are an easy target for quick cost cutting. How to safeguard essential data acquisition? How to assess the value of it?\nThe answer lies in a structured Value of Information analysis. While there are a lot of misconceptions and myths around VOI analyses\, the presenter will provide you with a simple and structured approach\, that can be easily applied to many problems. This not only helps justify your data acquisition (if warranted!)\, but in fact brings out where the value is. \nBiography\nAfter a PhD in Astrophysics at Utrecht University\, Jean-Paul joined Shell in 1993 as Petrophysicist. After an initial posting in Venezuela\, he joined Woodside Petroleum in Australia in 1997. The decline in oil prices in the late 90’s started his interest in Value of Information and uncertainty management\, which he has kept ever since. In Australia\, and subsequently in Oman and Norway\, Jean-Paul has had a variety of roles in Petrophysics and subsurface leadership\, all with a common theme in integration across disciplines. He is currently Shell’s Principal Technical Expert in Petrophysics for Integrated Reservoir Modelling\, and Subject Matter Expert in Value of Information and Uncertainty Management. \n\nAs usual all have an opportunity to socialise with fellow petrophysical professionals over drinks and snacks. \nDoors will open for registration and coffee at 3:30 pm and the talks will commence at 4:00 pm. The social hour will begin at 5:30pm. \nThanks to the generosity of our sponsors\, attendance will again be free. However please RSVP before 12th September 2017 on Facebook sending an email to info@dps-nl.org with your name\, position and affiliation. \nSave event to your google calendar or ICAL export for Outlook. URL:https://www.dps-nl.org/wordpress/event/198/ LOCATION:KIVI\, Prinsessegracht 23\, Den Haag \, 2514 AP ORGANIZER;CN="Dutch Petrophysical Society":MAILTO:info@dps-nl.org END:VEVENT BEGIN:VEVENT DTSTART;TZID=Europe/Helsinki:20170601T153000 DTEND;TZID=Europe/Helsinki:20170601T190000 DTSTAMP:20260517T073741 CREATED:20170502T180911Z LAST-MODIFIED:20170515T200146Z UID:132-1496331000-1496343600@www.dps-nl.org SUMMARY:June 2017 Meeting - Annual General Meeting\, and Operational Geomechanics DESCRIPTION:The next meeting of the Dutch Petrophysical Society will be at the Kivi building in Den Haag on Thursday 1st June 2017. \nThe theme of the meeting will be \n“Annual General Meeting”\, and “Operational Geomechanics”\nBefore the technical talks\, we will conduct the annual general meeting of the DPS where the year will be reviewed\, the financial position of the society presented\, and the outgoing board will hand over to the newly elected incoming board. \nFollowing the AGM we will present two talks: \n\nOperational geomechanics: an interdisciplinary topic\nPeter Schutjens (Shell)\nOperational geomechanics is a relatively young discipline (a few decades old) that is now actively studied and applied by hundreds of professionals in industry\, academia and service companies. It is built on foundations of civil engineering\, rock mechanics and soil mechanics\, and is characterized by an interdisciplinary approach. I will describe the operational issues that shape the job profile of an operational geomechanicist\, which include Earth stress state analysis\, pore pressure prediction\, borehole stability\, reservoir compaction and deformation\, subsidence\, casing deformation\, induced seismicity\, sand production\, and reservoir and overburden monitoring. Next to making sure that drilling and production operations are efficient and cost-effective\, there are important safety aspects to the job of a geomechanicist. I will describe a few\, also outlining the computer tools that we use to tackle these focusing on the importance of good-quality field data\, fit-for-purpose modeling and closing-the-loop between model results and operational decisions. \nBiography\nStructural geologist by training\, developed in geophysics and materials science\, with specialty experimental rock mechanics. First on salt powders (at Utrecht University\, the Netherlands) and from 1989 till 1999 in Shell Rijswijk on reservoir rocks. Work involved construction of deformation apparatuses\, core data collection\, microstructure analysis. \nIn 2000\, one year as an exchange scientist at SINTEF in Trondheim\, Norway\, mainly on 4D-seismic and AvO-analysis. Moved to Shell in New Orleans in 2001\, starting 10 years of operational support on geomechanics\, petrophysics and geophysics (the 3Gs) in Gulf of Mexico and North Sea (from Aberdeen). From 2010 to 2014\, team lead geomechanics and pore pressure prediction in the new Shell Technology Center in Bangalore\, India\, and global discipline lead for geomechanics. Since Jan. 2015\, back in Shell Rijswijk for project work on the interface of the 3Gs to support assets with geomechanics technology \n\n Transformation in minimizing operational risk with Geomechanics\nSurej Kumar Subbiah (Schlumberger)\nStuck drill pipe\, lost hole\, severe mud losses\, unable to hydraulically fracture the formation\, well shut down due to sand production\, early water breakthrough. Sound familiar?  These incidents can cost E&P companies millions of dollars. \nGeomechanics combines geology\, geophysics\, petrophysics and rock mechanics in order to describe state of earth stresses and rock mechanical properties.  This can be done along a single wellbore\, or in 3D field scale\, and the results are presented in what is known as the Shared Geomechanical Earth Model. This model helps in the understanding and managing of the risks associated with rock deformation\, which in turn helps minimize operational risks for the life of the field from exploration to abandonment. Examples include wellbore instability\, sand production\, hydraulic fracturing\, injectivity\, subsidence\, compaction\, fractures reactivation\, and thermal effects. \nThis presentation aims to increase awareness as to how one and the same Shared Geomechanical Model can be used by different departments in an E&P company for their operational planning\, with focus on drilling and completion activities. \nBiography\nBased in Abu Dhabi\, Surej Kumar Subbiah is currently the Principal Geomechanics Lead for Schlumberger Middle East.  Surej holds BS and MS degrees in petroleum engineering from the University of Technology Malaysia\, with specialization in geomechanics.  He spent the first five years of his career in an academic environment as a Research Associate and a Lecturer before he joined Schlumberger.  With 21 years of experience\,   Surej has been involved in many applied geomechanics projects from well centric to 3D field scale\, and conducted training courses in geomechanics for NeXT as well as SPE Netherlands and SPWLA Abu Dhabi. He is currently 2016/2017 SPE Distinguished Lecturer. \n\nAfter the talks there will be the opportunity to socialise with fellow professionals over drinks and snacks. \nDoors will open for registration and coffee at 3:30 pm and the talks will commence at 4:00 pm. The social hour will begin at 5:30pm. \nThanks to the generosity of our sponsors\, attendance will again be free. However please inform us of your intention to attend before Tuesday 30th May 2017 by clicking on the RSVP link below\, or by sending an email to info@dps-nl.org with your name\, position and affiliation. \nTo add the meeting to your outlook calendar – click the ‘ical export’ link below URL:https://www.dps-nl.org/wordpress/event/june-2017-meeting-annual-general-meeting-and-operational-geomechanics/ LOCATION:KIVI\, Prinsessegracht 23\, Den Haag \, 2514 AP ORGANIZER;CN="Dutch Petrophysical Society":MAILTO:info@dps-nl.org END:VEVENT BEGIN:VEVENT DTSTART;TZID=Europe/Amsterdam:20170302T153000 DTEND;TZID=Europe/Amsterdam:20170302T190000 DTSTAMP:20260517T073741 CREATED:20170220T192509Z LAST-MODIFIED:20170228T072422Z UID:110-1488468600-1488481200@www.dps-nl.org SUMMARY:March Meeting - Cased Hole Pulsed Neutron Formation Evaluation DESCRIPTION:Generously Sponsored by Weatherford\n \nThe next meeting of the Dutch Petrophysical Society will be at the Kivi building in Den Haag on Thursday 2nd March 2017. \nThe theme of the meeting will be \n“Cased Hole Pulsed Neutron Formation Evalulation”\nAt the meeting we will present two talks by Jon Musselman (Weatherford) and Hans de Koningh (Xodus Group) \n\nSystem Approach for Enhanced Pulsed-Neutron Applications\nJon Musselman (Weatherford)\nThrough-casing formation evaluation using pulsed-neutron measurements has advanced to address many challenging environments. Relatively low porosity\, multiple casing strings\, complex completion hardware\, and the need for very accurate fluid saturation results are a few of many situations that pose challenges for traditional capture measurements with conventional pulsed-neutron tools. These challenges can be met using a systems approach. Advanced tool hardware and instrumentation forms the foundation of the logging system\, but a combination of rigorous calibration\, detailed response characterization\, and powerful workflows and analysis techniques are required for accurate results. \nThe presentation reviews one such system\, with emphasis on the response characterization and summary workflows derived from characterization. These can be applied to oil and gas reservoirs in a wide range of environments. \nAbout the Presenter\nJon Musselman is the Global Production Services Product Champion for Weatherford Wireline\, currently based in Houston\, and working to develop solutions to address the challenges of through-casing formation evaluation and production logging. \nJon is a Mechanical Engineering graduate of the University of Texas – Arlington who brings a total of 35 years industry experience in Wireline services. He started his career as a Field Engineer with Schlumberger in North America where he later held a number of roles in field operations\, management\, sales and interpretation development\, primarily in the US Mid-Continent and Gulf of Mexico. He later joined Baker Hughes\, taking on wireline operations and sales management positions in Europe and the US. \nJon is a long-term member of SPE and SWPLA. He has been with Weatherford since 2012. \n  \n\nExtended Monitoring of a Mature Field – A Case Study\nHans de Koningh (Xodus Group)\nA mature gas field changed ownership after 30 years of production. The field produces from multiple fault compartments\, with varying gas – water contacts and depletion mechanisms. The new owner resumed field surveillance with a large campaign including several pulsed neutron log surveys. ON interpretation of the data it was found that many of the new surveys deviated significantly and consistently from original baseline surveys. An explanation was found to explain these deviations and justify a correction so that the entire set of pulsed neutron surveys could be interpreted consistently. \nHere we present a case study to illustrate the value of pulsed neutron logs\, especially to those who may not be so familiar with the techniques\, \nAbout the Presenter \nHans de Koningh worked for much of his career with Shell for various operating companies; including in Assen\, Aberdeen\, New Plymouth (NZ) and Muscat (Oman). In 2008 he returned to The Netherlands to work in consultancy\, first for (SGS) Horizon and in 2011 for the Xodus Group in his current role as Principal Petrophysicist\, working on assignments varying between quicklook petrophysical analyses\, Field Development Plans and CPR’s – and some cased hole log interpretation. \n\nAfter the talks there will be the opportunity to socialise with fellow professionals over drinks and snacks. \nDoors will open for registration and coffee at 3:30 pm and the talks will commence at 4:00 pm. The social hour will begin at 5:30pm. \nThanks to the generosity of our sponsors\, attendance will again be free. However please inform us of your intention to attend before Tuesday 28th February 2017 by sending an email to info@dps-nl.org with your name\, position and affiliation. URL:https://www.dps-nl.org/wordpress/event/march-meeting-cased-hole-pulsed-neutron-formation-evalulation/ LOCATION:KIVI\, Prinsessegracht 23\, Den Haag \, 2514 AP ORGANIZER;CN="Dutch Petrophysical Society":MAILTO:info@dps-nl.org END:VEVENT BEGIN:VEVENT DTSTART;TZID=Europe/Amsterdam:20161208T153000 DTEND;TZID=Europe/Amsterdam:20161208T190000 DTSTAMP:20260517T073741 CREATED:20160928T180305Z LAST-MODIFIED:20161102T103847Z UID:91-1481211000-1481223600@www.dps-nl.org SUMMARY:December Meeting - Nuclear Magnetic Resonance DESCRIPTION:Generously Sponsored by Baker Hughes\n \nThe next meeting of the Dutch Petrophysical Society will be at the Kivi building in Den Haag on Thursday 8th December 2016. \nThe theme of the meeting will be \n“Nuclear Magnetic Resonance”\nAt the meeting we will present two talks by Holger Thern (Baker Hughes and SPWLA 2016 Distinguished Lecturer) and Wim Looyestijn (Consultant) \n\nJoint Interpretation of Magnetic Resonance- and Resistivity-Based Fluid Volumetrics – A Framework for petrophysical evaluation\nHolger Thern (presenter) and Geoffrey Page\, Baker Hughes\nThe accurate quantification of fluid volumes is one of the most important tasks for determining the economic value of hydrocarbon reservoirs. Fluid saturation calculation from resistivity logging data has been established for many decades with known benefits and challenges. More recently\, the nuclear magnetic resonance (NMR) logging technology has developed as an alternative\, robust method for direct fluid volume estimation by separating movable from bound fluids. As today’s reservoirs are becoming more challenging\, conventional resistivity logging data evaluation involves increasing difficulties and ambiguities\, for instance in complex lithology due to the presence of conductive minerals\, low formation water salinity\, fractures and vugs\, or local variations in water resistivity. NMR logging data processing and interpretation are also not straight-forward in complex carbonates and heavy oil reservoirs\, as well as in case of wettability alteration and due to the presence of magnetic minerals. Ambiguities in either of the measurements can be efficaciously addressed by combining data from both logging services. \nWe present a systematic compilation and discussion of main properties affecting resistivity and NMR fluid volume estimations such as Archie parameters and T2 cutoffs. Several log examples illustrate a wide range of reservoir scenarios. In addition to the log interpretation aspect\, we also relate the results to their applications ranging from real-time drilling optimization through hydrocarbon-in-place estimates and reservoir modeling input to production and completion decisions. \nAbout the Authors\nHolger Thern is a Technical Lead for NMR research at the Celle Technology Center at Baker Hughes in Germany working with NMR technology for 18 years. Holger earned a B.A. in Physics from the University of Constance and an M.Sc. in Geophysics from the University of Cologne. His work experience includes data interpretation development and technical support for NMR wireline logging applications with Western Atlas in Houston\, Texas\, and the development of the MagTrak NMR LWD tool in Celle\, Germany. Currently he is working on new NMR applications and interpretation methods for both wireline and LWD NMR applications. \nGeoffrey Page studied physics at the Royal College of Science in London. He began his oilfield career as a Dresser Atlas field engineer 36 years ago\, moved into Petrophysics in Aberdeen 28 years ago\, and is now Region Petrophysical Advisor for Baker Hughes based in Aberdeen.  He is a former President of the Aberdeen chapter of the SPWLA (AFES) and was honoured with a “life membership.” He has written and presented many papers over the years\, helped organise many of the conferences including SPWLA 2008 in Edinburgh\, and in his spare time teaches the Petrophysics course of Aberdeen University’s “Integrated Petroleum Geoscience” MSc course. \n\nForward Modelling of NMR Logs in a Chalk Reservoir\nWim Looyestijn (consultant)\nIt is well known that interpretation of NMR logs on the basis of core-derived parameters often fails because the down-hole situation is much different from that in the laboratory. Core measurements at full in-situ conditions are in principle possible\, but very expensive and therefore bound to span a limited range of properties. \nWe demonstrate that the same can be achieved by forward modelling of the NMR response. Starting point is a representative set of water-saturated core samples measured at ambient conditions. Forward modelling then introduces changes in the NMR response corresponding to full in-situ conditions\, including effects due to the presence of native hydrocarbons\, mud filtrate invasion and  wettability.  Interpretation parameters\, such as (variable) T2-cutoff\, and permeability exponents can now be computed on NMR data as they appear on the log. Once the workflow has been set-up\, any change in conditions is automatically translated in an update of the correlations; this would not be possible with laboratory experiments. \nWe show that the actual log response is faithfully predicted by our modelling for two wells in a N-Sea chalk reservoir. \nThis study was presented at the SPWLA symposium in Cartagena\, 2012\, and received a Best Paper award. \nAbout the Author\nWim Looyestijn is a professional researcher with more than 30 years’ experience with Shell\, and since a few years as consultant. His main topic has become interpretation of NMR core and log data on which he became an internationally acknowledged expert. Wim pioneered in utilizing diffusion effects to discriminate oil from water\, leading to Shell’s NMR processing packageMacNMR\, which set a standard in the Industry. Other developments include derivation of capcurves from NMR\, and\, more recently\, wettability and modeling of in-situ NMR log response. \nWim holds a PhD from Leiden University in The Netherlands\, and is a member (and past President) of DPS\, SPWLA and SPE. He has been Editor of Petrophysics\, and was twice an SPWLA distinguished speaker. \n\nAfter the talks there will be the opportunity to socialise with fellow professionals over drinks and snacks. \nDoors will open for registration and coffee at 3:30 pm and the talks will commence at 4:00 pm. The social hour will begin at 5:30pm. \nThanks to the generosity of our sponsors\, attendance will again be free. However please inform us of your intention to attend before 1st December 2016 by sending an email to info@dps-nl.org with your name\, position and affiliation. URL:https://www.dps-nl.org/wordpress/event/december-meeting/ LOCATION:KIVI\, Prinsessegracht 23\, Den Haag \, 2514 AP ORGANIZER;CN="Dutch Petrophysical Society":MAILTO:info@dps-nl.org END:VEVENT BEGIN:VEVENT DTSTART;TZID=Europe/Amsterdam:20160901T153000 DTEND;TZID=Europe/Amsterdam:20160901T190000 DTSTAMP:20260517T073741 CREATED:20160805T165508Z LAST-MODIFIED:20160809T011451Z UID:76-1472743800-1472756400@www.dps-nl.org SUMMARY:September Meeting - Permeability and Capillary Pressure DESCRIPTION:Generously Supported by Shell  \nThe next meeting of the Dutch Petrophysical Society will be at the Kivi building in Den Haag on Thursday 1st September. The theme of the meeting will be \n“Permeability and Capillary Pressure” \nAt the meeting we will present two talks by Iulian Hulea (Shell) and Albert Hebing (Panterra) \n\nHETEROGENEOUS CARBONATE RESERVOIRS: ENSURING CONSISTENCY OF SUBSURFACE MODELS BY MAXIMIZING THE USE OF SATURATION HEIGHT MODELS AND DYNAMIC DATA  \nIulian Hulea\, Shell \nAttempts to characterize carbonate reservoirs follow various rock-typing methods that focus on Special Core Analysis (SCAL) output where core-derived permeability and capillary pressures play a central role. Given the late stage in a project where these results typically become available\, integration with dynamic measurements such as wireline formation testing and well testing data is often overlooked. Mobilities derived from formation testers can be compared to permeabilities obtained from various averaging methods. Where no core permeabilities are available\, a permeability curve may be derived based on the capillary pressure data that is already part of the model. \n\nLaboratory Test Methods for Determining Capillary Pressure Data \nAlbert Hebing – Laboratory Manager – PanTerra Geoconsultants \nCore capillary pressure data provide fundamental input to reservoir models and saturation-height functions that in turn are necessary to calculate STOIIP and initialise reservoir simulation models.  As SCAL data experiments are seen as the “ground truth” in formation evaluation\, it is therefore important that the appropriate test method is selected\, and correct data interpretation is done. \nThis DPS presentation is to give an overview of the various analytical techniques that are employed in the industry to obtain Pc lab data\, and the advantages and limitations of each individual method. \nBiography: \nAlbert has a BSc in Petroleum Engineering from the Heriot-Watt University.\nFrom 1989 till 1995\, Albert worked at Core Laboratories Netherlands and Norway\, performing special core analysis measurements and setting up labs.\nSince 1995\, Albert is working for PanTerra Geoconsultants BV\, as Laboratory Manager\, where he setup and developed the SCAL\, PVT and EOR labs at PanTerra. \nCurrently\, Albert is mainly involved in designing analytical programs\, planning and controlling the resources and activities of the laboratories\, QA\, business development and has a technical advisory role in core analysis. In addition to this\, Albert still participates in the major SCAL and EOR projects within PanTerra for acquisition\, evaluation and implementation of petrophysical SCAL/EOR measurements\, data review and audits. \n\nAfter the talks there will be the opportunity to socialise with fellow professionals over drinks and snacks. \nDoors will open for registration and coffee at 3:30 pm and the talks will commence at 4:00 pm. The social hour will begin at 5:30pm. \nThanks to the generosity of our sponsor Shell\, attendance will again be free. However please inform us of your intention to attend before 29th August 2016 by sending an email to info@dps-nl.org with your name\, position and affiliation. URL:https://www.dps-nl.org/wordpress/event/september-meeting-permeability-and-capillary-pressure/ LOCATION:KIVI\, Prinsessegracht 23\, Den Haag \, 2514 AP END:VEVENT BEGIN:VEVENT DTSTART;TZID=Europe/Amsterdam:20160519T153000 DTEND;TZID=Europe/Amsterdam:20160519T190000 DTSTAMP:20260517T073741 CREATED:20160510T110750Z LAST-MODIFIED:20160522T113625Z UID:25-1463671800-1463684400@www.dps-nl.org SUMMARY:Dutch Petrophysical Society - Revival Event “Petrophysics in The Netherlands: The Past\, Present and Future” DESCRIPTION:After a 4 year pause\, the Dutch Petrophysical Society is being relaunched with a half day event on “Petrophysics in The Netherlands: The Past\, Present and Future”. \nThe Dutch Petrophysical Society strives to bring together professionals in The Netherlands that work with or have an interest in Formation Evaluation and would like you to be part of the journey of reviving the Society. \nThe afternoon promises several good talks on the variety and challenges faced by Petrophysics in the Netherlands followed by a poster session covering vendor Wireline and Logging While Drilling (LWD) new technologies. The poster session will be an opportunity for you to meet fellow professionals over drinks and snacks. \nAdmission is free but you will be kindly asked to confirm your attendance. Please feel free to forward this note to fellow colleagues or friends who may be interested as well. \n \nProgram \n15:30 – Arrival & registration \n16:00 – Welcome & DPS Introduction – Shyam Ramaswami – Dutch Petrophysical Society (DPS) President \n16:15 – Session I – “The evolution of life-cycle petrophysical evaluation & data acquisition techniques in NAM”\, Oscar Kelder – Petrophysics Discipline Lead and Cluster Development Lead – NAM \n16:45 – Session II – “Amstel field – from first oil discovery to first oil production”\, Danijela Krizanic – Asset Petrophysicist – ENGIE E&P Nederland \n17:15 – Break \n17:30 – Session III – Wireline & LWD New Technology Poster Session & networking (Includes drinks & snacks) \n18:30 – End \nRSVP \nPlease send confirmation of attendance or regrets to info@dps-nl.org by Monday 16th May\, 2016 \nEntrance Fee \nFree of Charge for all \nSession I – “The evolution of life-cycle petrophysical evaluation and data acquisition techniques in NAM” \nOscar will present a talk on how evaluation and data acquisition techniques in life-cycle petrophysics in NAM has evolved over the years\, its current challenges and its direction in the future. \nOscar Kelder – Is a seasoned Petrophysicist with 20 years of petrophysical experience in various IOC’s and NOC’s\, including Statoil\, Saudi Aramco and the last 10 years with NAM in The Netherlands. He is intimately familiar with gas field development in the Netherlands and the challenges that come with them. \nSession II – “Amstel field – from first oil discovery to first oil production” \nLocated 12km NW of Scheveningen beach\, the field holds a title of the first oil discovery in the Dutch offshore. Although it has been discovered in 1962; it has not been put into production until early 2014. \nThe presentation will cover the progress of the field development since its discovery with focus on reservoir characterization aspect of the project. \nDanijela Krizanic – Holds MSc in Petroleum Geology from University of Zagreb\, Faculty of Mining\, Geology and Petroleum Engineering. She worked for INA Oil Company and Baker Hughes before joining Engie in 2009. Currently she works as asset Petrophysicist for Dutch offshore oil and gas fields. \nSession III – Wireline & Logging While Drilling (LWD) New Technology \n1. “Microseismic monitoring in Groningen” – Baker Hughes \n2. “TightGas exploration petrophysics” – Halliburton \n3. “LWD Imaging for Well Placement in Faulted Reservoir” – Schlumberger \n“Next generation Pulsed Neutron Tool” – Weatherford \nKoninklijk Instituut Van Ingenieurs (KIVI) \nPrinsessegracht 23\, 2514 AP Den Haag \nDirections: \nWalk – 10 mins walk from Den Haag Central Station \nTram – Den Haag – Malieveld – Line #5 or #9 \nCar – Public underground parking – Den Haag – Malieveld URL:https://www.dps-nl.org/wordpress/event/dutch-petrophysical-society-revival-event-petrophysics-in-the-netherlands-the-past-present-and-future/ LOCATION:KIVI\, Prinsessegracht 23\, Den Haag \, 2514 AP END:VEVENT END:VCALENDAR