The meeting was held on Wednesday 15th September at the headquarters of Energie Beheer Nederland (EBN) in Utrecht, a departure from our usual venue, and was followed by a social gathering with drinks and snacks at a nearby cafe.
The theme of the meeting was petrophysical determination of reservoir quality and heterogeneity, encompassing both hydrocarbon and geothermal reservoirs and the first presentation was entitled Reservoir Heterogeneity and its Impact on Reservoir Productivity. It was given by Danijela Krizanic, Senior Petrophysicist at Sproule-ERCE. The talk kicked off with various definitions of heterogeneity and discussed assessment of the degree of heterogeneity from well logs, and its relation to reservoir quality index and pore size distribution. Examples from hydrocarbon and geothermal wells were given.
The second talk, entitled Quantifying Porosity, Permeability and Reservoir Quality in Geothermal Wells Using a New High Efficiency Nuclear Magnetic Resonance Logging Methodology was presented by Tom Bradley, Associate Fellow and Global Subject Matter Expert at Baker Hughes. The talk began by pointing out that, for geothermal wells, the cost of rig time for carrying out standard NMR logging runs was usually prohibitive, but made the point that, since hydrocarbons are largely absent, logging speed could be increased as the t1 relaxation time for water, which is controlled by the pore size distribution in a water-wet rock, is several times smaller than its counterpart for oil, which is controlled by bulk effects. The concept was tested at the TU Delft geothermal well, where standard and high-speed NMR logging runs were compared, and shown to be viable.
The two speakers are shown to the left in the photo below, having just received their speaker gifts, phone holders emblazoned with the DPS logo, from DPS president Chris Harris.
The meeting was well attended with several new faces and most of those present gathering afterwards at Bunk Bar and Restaurant for the social hour (see photograph below).
