Velocity modeling techniques and prestack migration imaging techniques

         Velocity modeling technology: With a complete series of 2D/3D time domain, depth domain velocity analysis and velocity modeling technology, including complete time domain anisotropic velocity analysis, depth domain velocity modeling based on geological understanding, anisotropic mesh chromatography inversion and full waveform inversion (FWI) and other technologies, it can meet the requirements of anisotropic stack, anisotropic prestack time migration, anisotropic (VTI/TTI) pre-stack depth migration imaging for velocity field and parameter analysis, and achieve the accuracy of high-precision high-resolution imaging. Improve the imaging effect of velocity modeling and seismic imaging for different geological tasks such as complex surface complex structures, small-scale structures, gas cloud areas, and volcanic rock regions

   Q depth migration represented by the prestack migration imaging technology: with undulating surface, VTI, TTI anisotropic Kirchhoff, Gaussian beam, inverse time migration and Q depth migration techniques. In particular, the combined use of Q tomography and Q depth migration technology can reconstruct the accurate Q absorption attenuation model of the underground medium based on the data-driven seismic data, which can effectively compensate for the absorption and attenuation of the underground medium along the ray path, compensate for energy attenuation and frequency loss on the ray path, and improve the imaging accuracy. The iterative processing process of Q chromatography and Q depth migration technology has been widely used in seismic data processing of land and marine seismic data, which can effectively improve the signal-to-noise ratio and resolution of data and eliminate the influence of abnormal lithology on the lower volt structure.