Microseismic monitoring has proved to be a valuable technology for assessing and optimizing hydraulic fracturing in a host of tight sand and gas shale reservoirs. Parameters such as fracture length, height, azimuth, and asymmetry are readily identified, but this technology can also be useful for understanding staging effectiveness, stimulated volume, complexity and network growth, natural fractures, stress azimuth and changes in that azimuth, fault interactions, and reservoir behavior as a result of the treatment. Various published data sets are examined to show how both quantitative and qualitative information about the fracturing behavior, completion effectiveness, and reservoir behavior can be usefully extracted from the microseismic data. Examples will include both vertical and horizontal wells, relatively planar and network fracture systems, various staging and diversion techniques, and faulted and naturally fractured reservoir response.

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