Summary
Microseismic analysis is used to determine event locations, event strength, stress and energy release, and relative fracture lengths. Additionally, source mechanisms and their associated failure mechanisms are calculated for high-quality events using Seismic Moment Tensor Inversion. These microseismic observables are used together with the detailed hydraulic fracture treatment data to identify several dynamic changes in the growth of the discrete fracture network. In this study, we identify a preferred fracture set that is consistent with the regional stress and easily activated throughout the treatment program. A secondary fracture set is also observed but is only temporarily activated by increases in proppant mesh size. Abrupt changes in event rate, fracture plane orientation, source mechanism, and proximity to the treatment zone are linked to changes in the treatment program, such as mesh size, providing insight into the role and effectiveness of both fluid and proppant on extending the connected discrete fracture network.
