From Bureau of Economic Geology, The
University of Texas at Austin (www.beg.utexas.edu).
For more information, please contact the author.
Bureau Seminar, September 20, 2013
Link to streaming video: available 09.20.2013 at 8:55am
BEG UT GeoFluids Consortium
Knowledge of permeability allows us to illuminate flow physics, understand production data, design optimal hydraulic fracture treatments and predict long-term production performance. However, shale permeability is challenging to measure. I describe advances we have made in measuring nano-darcy permeability with transient pulse decay method. We find vertical permeability of ~2 nd and horizontal permeability of ~100 nd in Barnett shale samples. In addition, we find stress dependency in these rocks (decline in permeability with increasing stress). We also describe our first results that illuminate multi-scale permeability behavior in shales, which we attribute to sample heterogeneity at the core scale. Our future work is focused on exploring permeability in shales under different stress and pressure conditions that are characteristic of those encountered during production.