Hydraulic fracture initiation and propagation in the presence of multiple fluid injection sources and under far-field stresses is investigated experimentally utilizing a novel fracturing cell. Porous test specimens with injection points in different configurations are placed between two transparent plates. Experiments are conducted to examine hydraulic fracture growth in proximity to a constant pressure injection source as well as propagation of multiple neighboring fractures under different injection conditions. The fracturing process is recorded using a high resolution digital camera. A variety of fracture behavior is observed in these experiments that demonstrate the interplay between high pore pressure regions, the applied contrast in far-field stresses, and fluid injection scheme and configuration of injectors.
Laboratory Observations of the Effect of Pore Pressure on Hydraulic Fracture Growth
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AlTammar, M. J., Sharma, M. M., and R. Manchanda. "Laboratory Observations of the Effect of Pore Pressure on Hydraulic Fracture Growth." Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, San Francisco, California, USA, June 2017.
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