Abstract：The Kunbei area has abundant oil and gas resources with low exploration degrees. However, the developed fault systems, serious noise interference, and complex surface conditions and underground structures (dual complexity) result in the poor quality of original seismic data, serious static correction problems, and great difficulty in accurate velocity modeling, ultimately leading to considerable difficulty in fine seismic imaging in the Kunbei fault thrust belt. Relying on the GeoEast processing system, this study solves the various problems mentioned above. Specifically, serious static correction problems are solved by Fresnel tomographic static correction and reflection-based super-trace residual static correction; noise is suppressed step by step by applying a variety of prestack denoising techniques to enhance the signal-to-noise ratio (SNR) on the premise of protecting the effective reflected signal; with geological knowledge and information on drilled wells, a high-precision migration velocity model is built with well-controlled or layer-controlled fine velocity analysis technique to improve the quality of seismic imaging. The final seismic results reveal accurate determination of the structural morphology and accurate location of the fault and the breakpoints. The high-quality data from the results provide reliable seismic support for comprehensive geological research.
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