The Role of Mineral Composition on the Frictional and Stability Properties of Powdered Reservoir Rocks
- Zhang, Fengshou
- An, Mengke
- Zhang, Lianyang
- Fang, Yi
- Elsworth, Derek
DOIAbstract
The growing hazard of induced seismicity driven by the boom in unconventional resources exploitation is strongly linked to fault activation. We perform laboratory measurements on simulated fault gouges comprising powdered reservoir rocks from major oil and gas production sites in China, to probe the control of mineral composition on fault friction and stability responses during reservoir stimulation. Double direct shear experiments were conducted on gouges with phyllosilicate content ranging from 0 to 30wt.% and grain sizes <150m, at constant normal stresses of 10-40MPa and conditions of room temperature and water saturation. The velocity step and slide-hold-slide sequences were employed to evaluate frictional stability and static healing, ...
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