Rock Fracture Monitoring Based on High-Precision Microseismic Event Location Using 3D Multiscale Waveform Inversion

Figure 2

2D slice view of the heterogeneous velocity model, 8 test event locations and their triggered sensors (all test events and sensors are projected onto a 2D inclined plane determined by least square distance from the 28 sensors). The background shows the variation of the strong heterogeneous velocity model: the pink and red colors correspond to low-velocity zones, while the blue color corresponds to high-velocity zones. The dashed black lines correspond to the straight ray paths from 8 test events to the corresponding triggered sensors, showing the general data coverage for the FWI location synthetic test.