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Recent advances in Distributed Acoustic Sensing (DAS) technology allow using DAS for active seismic monitoring of Stimulated Rock Volume (SRV). An inter-stage DAS Vertical Seismic Profiling (VSP) survey was acquired during a zipper-fracturing stimulation. PS-waves scattered by the SRV were observed in the data. They are associated not only with each hydraulic fracturing stage of the well equipped with a fiber-optic cable but also with various stages of an adjacent well. Full wavefield modeling and postprocessing of the field data help us to analyze stage by stage variations in SRV, fracture closure time, and interactions between zipper wells. As a result, we have been able to estimate SRV height in a fiber well, and constraint the SRV height and length for other wells of the zipper group. This information can be extremely valuable in optimizing hydraulic fracturing operations.
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Titov et al. (2020) studied this question.
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