Anisotropic parameter analysis of multi-component data in VTI media
Li Qin1, Li Qingchun2, Zhang Lin3
1. College of Geological and Environmental Sciences, Xi'an University of Science and Technology, Xi'an, Shaanxi 710054, China; 2. College of Geology Engineering and Geomatics, Chang'an University, Xi'an, Shaanxi 710054, China; 3. Shaanxi Center of Geological Survey, Xi'an, Shaanxi 710016, China
Abstract:Using isotropic parameter analysis to correct seismic gathers with long-offset data can result in normal moveout stretching and stack distortion. But anisotropic parameter analysis can effectively process reflections of gathers with long-offset. In this article, we illustrate anisotropic parameter analysis of PP data and PSV data. In anisotropic parameter analysis of PSV data, we take an estimation-analysis-pickup flow to limit the range of value of anisotropic parameters, and simplify the procedure of anisotropic parameter analysis by making full use of multi-component seismic records, which improves accuracy and efficiency of anisotropic parameter analysis. By optimized calculation of anisotropic parameter spectrum, the spectrum resolution can be improved. Tests on model and real datasets prove the validity and feasibility of the proposed method.