Growing energy demand over the few last decades has led to a great deal of attention to unconventional shale gas reservoirs. The production from these reservoirs are feasible through hydraulic fracturing. An important issue regarding hydraulic fracturing is the production loss due to the creep-induced closure of fractures. This paper reports a study on the influence of elevated temperature on the creep deformation of shale rocks. To this end, a series of multi-stage triaxial creep tests differing in stress conditions and temperature is carried out on two samples of the Mancos shale, one cored parallel and the other normal to the bedding. Results indicate a significant increase in the creep rate due to increasing the temperature. It is also observed that the sample cored parallel to the bedding exhibits higher stiffness and a lower creep strain rate compared to the one cored normal to the bedding.
Influence of Temperature and Anisotropy on Creep Behavior of Mancos Shale
Khosravi, Elahe, and Ahmad Ghassemi. "Influence of Temperature and Anisotropy on Creep Behavior of Mancos Shale." Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, San Francisco, California, USA, June 2017.
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