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Key Technology and Effect of Seismic Data Processing of Dry Hot Rock In Gonghe Basin
The goal of dry hot rock exploration in Gonghe basin, Qinghai Province is to detect the distribution of fault system and the distribution, shape, buried depth and spatial distribution law of dry hot rock strata, so as to guide the development of dry hot rock. Qinghai Gonghe basin is dominated by plateau and mountainous areas, with complex surface, changeable lithology and large elevation change. The static correction problem of seismic acquisition data is prominent. The effective signal energy of single shot is weak, the frequency is low, the energy of multiples and refractions is strong and the distribution range is wide, which affects the imaging accuracy of seismic data of dry hot rock and restricts the internal characterization of dry hot rock. In order to improve the imaging accuracy of dry hot rock seismic data and depict the internal faults and fractures of granite body, on the premise of seismic data fidelity, improve the signal-to-noise ratio and resolution, and study and form the key technologies of dry hot rock seismic data processing, such as high-precision static correction, prestack multi domain denoising, multiple attenuation and so on. After the application of the key technology of dry hot rock seismic data processing in Gonghe basin, Qinghai Province, the imaging profile has been significantly improved, the formation wave resistance characteristics are clear, the formation contact relationship is clear, the breakpoint is clear, the structural form is reasonable, the top characteristics of granite are clear, and the inside information of deep granite is rich, which provides basic data for the subsequent interpretation and comprehensive research of dry hot rock seismic data.