Correlating laboratory observations of fracture mechanical properties to hydraulically-induced microseismicity in geothermal reservoirs.

摘要: To date, microseismicity has provided an invaluable tool for delineating the fracture network produced by hydraulic stimulation of geothermal reservoirs. While locations microseismic events are fundamental importance, there is a wealth information that can be gleaned from induced seismicity (e.g. fault plane solutions, seismic moment tensors, source characteristics). Closer scrutiny spatial and temporal evolution tensors shed light on systematic characteristics fractures in reservoir. When related to observations laboratory experiments, these trends interpreted terms mechanical processes most likely operate network. This paper reports properties inferred systems. These lead interpretations about initiation, after shut-in, linked fractures, strength. The correlations highlight fact combination temperature, stressing rate, time, fluid-rock interactions alter fluid transport