Reservoir Rock Physics Trends in the Barents Sea

Our detailed Barents Sea rock physics study focuses on the most prolific Jurassic and Triassic reservoirs. This project establishes key depth dependent rock physics trends in the Norwegian Barents Sea region.

PGS analyzed 13 wells with complete log suites covering data from the Hammerfest Basin, Bjarmeland Platform, Masoy Fault Complex, Nordkapp Basin and the Finnmark Platform. Well analyses include log conditioning and QC, seismic petrophysics, Gassmann fluid substitution, rock physics analysis, synthetic seismogram generation with different fluid fill scenarios and AVO/AVA modeling.

Integration of the results was performed using a unique approach, introducing statistically valid depth trends of elastic properties. These trends, derived with their uncertainties, describe varying AVO behavior with depth. Recorded S-wave measurements allow the establishment of accurate Vp-Vs relationships which can be used for shear wave prediction.

Based on the analysis of all available data, principle stochastic scenarios for different reservoir types and their seismic responses (changes in lithology, porosity, fluid properties) have been modeled to provide estimates as to the possible range of likely reservoir types to be encountered in the study area.

Product deliverables include a study report as well as individual well reports and LAS files. For further information
please contact us.

Stochastic forward modeling results over different depth ranges in the acoustic impedance, Vp/Vs domain for different lithology and fluid combination. Green is shale, yellow is the sandiest (LHS cross-plot), blue is brine, light green is oil and red is gas sand.