Source location is a key technique in microseismic research,and microseismic sources can be located by reverse time propagation of microseismic signals.In the process of reverse time location in elastic media,coupled P-waves and S-waves in micro-seismic signals will produce artifacts in source focusing results,which have a negative impact on picking source locations.We pro-pose an elastic-wave reverse-time microseismic location algorithm based on the Tene-cor focusing imaging operator.Elastic wave e-quations with decoupled P-and S-waves are used to obtain the reverse-time wave fields of P-and S-waves,which are then imaged through cross correlation using the Tene-cor imaging operator to obtain source locations.The algorithm is tested using synthetic data and field data.Numerical examples show that the location algorithm proposed in this paper can focus the radial artifacts gener-ated by interference imaging in addition to suppressing the crosstalk noises caused by wavefield coupling in the imaging results.Compared with traditional algorithms,our method can effectively improve the resolution of source location in the context of differ-ent receiver conditions,missing frequency bands,and inaccurate velocity models.
microseismicreverse time locationfocusing functionelastic wave decouplingimaging operator
维普
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