Microseismic interpretation of hydraulic fracturing requires an understanding of the mechanism of the microseismic sources. Quantitative geomechanical models can predict microseismicity for quantitative comparison with field data and can be used to reconcile 3D seismic earth models, fracture engineering, and fracture monitoring. Because microseismicity represents only one component of the geomechanical response to hydraulic fracturing, a microseismic geomechanics framework can provide insights into the connection with the fracture network. During hydraulic fracturing, microseismicity can be induced by both fluid pressure and stress mechanisms, resulting in wet events directly associated with the fracture network and remote dry events. Accurate interpretation of the hydraulic-fracture characteristics requires distinguishing identification of dry microseismicity not in hydraulic connection with the stimulated fracture network. Predictive microseismic geomechanical models also can be used to infer the primary, conductive hydraulic-fracture networks and to run scenario testing to improve engineering design.

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