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A New Pore Pressure Prediction Method for Unconventional Resources

February 17, 2022
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Presented by:  Kim McLean, Team Lead - Formation Evaluation
Featured technology:  Pore Pressure for Unconventionals


The pore pressure prediction method proposed in this study is a modified Eaton-based velocity-effective stress approach that accounts for the significant inorganic mineralogy, lithology and porosity variations that occur in unconventional resource stratigraphies. Based on a rock physics model, the approach corrects for mineralogy and porosity variations to obtain a sonic velocity where overpressure is the main controlling factor on the corrected sonic velocities. Additionally, the influence of organic minerals (kerogen, TOC) on sonic velocities and density in mud rock are accounted for in this approach. Using well log data, the mineralogical compositions are estimated from multi-mineral inversion. After correcting for these factors, the approach presented gives acceptable pore pressure prediction results that conform with measured DFIT pressure data. 


Kim McLean, Team Lead - Formation Evaluation

Kim McLean received her Bachelors of Science degree from the University of New Orleans before continuing to Central Washington University, where she studied the structural geology of the Tien Shan in Kyrgystan for her Master’s thesis. After receiving her MSc, Kim entered the energy industry, and now has over 15 years of experience. She worked at Halliburton and Paradigm before spending two years as the petrophysicist for the Pike Asset team with BP in Calgary.  At Emerson E&P Software, Kim applies her practical petrophysical experience to the work she does with the Geolog Formation Evaluation application.