Sensitivity and Inversion Strategy of Anisotropic Parameters of VTI Medium Based on RTM ADCIGs

With the wide application of wide-azimuth acquisition and the long offset aperture required for high-precision imaging methods such as reverse time migration (RTM), the current anisotropic velocity modeling and inversion methods are not well adapted. Therefore, based on the RTM imaging, according to the pseudo-acoustic equation, the angular gather is extracted by Poynting vector method. Based on the sensitivity of anisotropy parameters to different angles and offsets, judging the accuracy according to the flattening degree of the angular gather, we proposed VTI media parameters inversion strategy. The numerical test demonstrated the accuracy and feasibility of the method, and the real seismic data test has achieved good application effect and can be more accurate imaging complex structure.