Application of Anisotropic Fracture Prediction Technology in Ocean Bottom Cable Seismic Data Based on OVT Domain
With the continuous development of ocean bottom seismic(OBS)acquisition meth-ods,the azimuth distribution of marine seismic data becomes increasingly wider.Wide azi-muth seismic data with its large amount of information and good spatial continuity provides high-quality data basis for accurate prediction of fracture development zones in reservoirs.Based on the OVT(Offset Vector Tile)domain imaging of OBS seismic data,this paper car-ries out research on seismic fracture detection technology,analyzes the amplitude azimuthal anisotropy characteristics of P wave in complex structural areas,predicts the direction and density of fracture development according to the basic principle that seismic amplitude chan-ges with azimuth.The OVT domain of OBS 3D seismic compressional wave data in Bozhong,Nanhai and other work areas is processed to obtain multiple azimuth seismic data volumes.The least square fitting algorithm is applied to calculate the development density and direc-tion of fractures in this work area,which provides a certain basis for the design of drilling and development plans for later fractured oil and gas reservoirs.
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