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Petrophysical properties of tight gas sandstones

June 6 @ 3:30 pm - 5:30 pm CEST

Petrophysical properties of tight gas sandstones

Prof. Quentin Fisher

School of Earth and Environment, University of Leeds, Leeds, LS2 9JT, UK

Large volumes of gas remain trapped within tight gas sandstones (TGSs), which can be produced at commercial rates using modern drilling and completion technologies (i.e. horizontal wells and hydraulic fracturing). Characterizing is often regarded as difficult, time consuming and expensive. The Joint Industry Project, PETGAS, has been running for ten years and has the specific aim of improving the way that we characterize TGS’s. It is built a high quality database of key petrophysical properties that has been used to identify key controls on the petrophysical properties of TGSs and also provides analogues for reservoir when core analysis is not available. The analysis of the results has been aided by the development of a be-spoke data visualization and data mining software, PETMiner, that allows image data (e.g. SEM and optical micrographs, CT scans etc.) to be integrated with laboratory measurements (e.g. porosity, permeability, capillary pressure data etc.).

 

The project has developed new experimental techniques such as high pressure, stressed mercury injection porosimetry, which provide valuable insights into the capillary pressure of low permeability sandstones. A particularly exciting development, which is currently undergoing field trials, is that the estimate the likely flow properties of reservoirs based on the integration of the results of microstructural characteristics of cuttings with wireline log analysis. The analysis can be applied very rapidly (12 hours of receiving samples) and is particularly useful for reappraising tight reservoirs where no core was taken or for providing rapid estimates of properties before core is available.

 

The presentation will highlight some of the key advances made in the characterization of TGSs and will also discuss some of the key knowledge gaps that remain.

 

Bio

Prof. Fisher studied geology at Sheffield University after which he gained a PhD in geochemistry from the University of Leeds. Fisher then spent 15 years conducting research and consultancy on the impact of faults on fluid flow in petroleum reservoirs. In 2008, he took up the Chair in Petroleum Geoengineering at the University of Leeds where he has led research projects that integrate workflows and software in the geological, geophysical, geomechanical and petroleum engineering disciplines. His current research interests include: unconventional hydrocarbons; measurement, visualization and data-mining of petrophysical properties; faulting and fluid flow; coupled fluid flow-geomechanical modelling; multiphase flow in low permeability porous media.

 

Details

Date:
June 6
Time:
3:30 pm - 5:30 pm

Venue

KIVI
Prinsessegracht 23
Den Haag , 2514 AP
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