石油物探2017，Vol.56Issue(4)：534-542,9.DOI:10.3969/j.issn.1000-1441.2017.04.009
TTI各向异性逆时偏移技术及应用
Anisotropic reverse time migration technique in TTI media and its application
摘要
Abstract
Anisotropy is widespread in the subsurface formation medium.The conventional isotropic seismic migration imaging technique often leads to low imaging accuracy and even depth error.The application of wide azimuth seismic acquisition technique and high precision RTM imaging technology have highlighted the influence of anisotropy.In this paper we begin with the weakly anisotropic elastic wave equation,First,the VTI anisotropic pseudo acoustic wave control equation is obtained by quasi acoustic approximation.Then,the cross derivative term is introduced to coordinate rotation to get the TTI anisotropic pseudo acoustic wave control equation.Next,the TTI-RTM migration operator is obtained by high order finite difference.Finally,the influence of the S-wave component is eliminated by wave field correction to improve the accuracy of the anisotropic migration operator.The model test and field data processing results show that,the technique is more beneficial to the anisotropic medium with higher precision and it's an ideal technique for high precision seismic imaging.关键词
各向异性/拟声波近似/控制方程/TTI逆时偏移Key words
anisotropy/quasi acoustic wave approximate/control equation/TTI reverse time migration分类
天文与地球科学引用本文复制引用
王咸彬..TTI各向异性逆时偏移技术及应用[J].石油物探,2017,56(4):534-542,9.基金项目
国家高技术研究发展计划(863计划)项目(2011AA060303)资助.This research is financially supported by the National High-tech R&D Program (863 Program) (Grant No.2011AA060303). （863计划）
