石油物探2025，Vol.64Issue(3)：502-509,8.DOI:10.12431/issn.1000-1441.2023.0454
VTI介质VSP数据地震干涉成像方法
VSP interferometric imaging in VTI media
摘要
Abstract
Imaging of high-angle and sub-salt structures is one of the key and challenging aspects in current oil and gas exploration research.The data acquisition method of surface excitation and vertical well reception can be used to obtain information about high-steep structures.In addition,cross-well seismic data contains even richer information about high-steep structures.However,in actual acquisition,cross-well seismic surveys are costly.To achieve the accurate imaging of high-angle structures in complex anisotropic media,this paper presents an interferometric method.The VSP interferometry formula for VTI media is derived based on the reciprocity theorem.The principle of cross correlation is used to eliminate seismic waves with overlapping propagation paths in two shot records and generate the responses of a virtual source,which simulates a recording geometry moving closer to the targets for more information about high-angle structures.A comparative study is performed to check whether or not virtual source data are consistent with the VSP data acquired using the source and geophones in the borehole.The final image is the reverse time migration results of virtual source data.Numerical tests show that anisotropic migration is superior to isotropic migration in continuous imaging of high-angle structures with reduced noises.The proposed VSP interferometric method is a feasible solution to VTI media imaging and may effectively improve the imaging accuracy of high-angle and sub-salt structures.关键词
VTI介质/VSP/互相关/地震干涉/虚拟源数据/逆时偏移Key words
VTI media/vertical seismic profiling/cross correlation/seismic interferometry/virtual source data/reverse time migration分类
石油、天然气工程引用本文复制引用
丁泽政,曲英铭,李振春,任一..VTI介质VSP数据地震干涉成像方法[J].石油物探,2025,64(3):502-509,8.基金项目
国家自然科学基金项目(42174138,42074133)、中国石油天然气股份有限公司重大科技合作项目(ZD2019-183-003)、中国科协青年人才托举计划项目(YESS20200237)和中央高校基本科研业务费专项(22CX07007A)共同资助.This research is financially supported by the National Natural Science Foundation of China(Grant Nos.42174138,42074133),the Major Science and Technology Cooperation Project of China National Petroleum Corporation(Grant No.ZD2019-183-003),the Youth Talent Support Program of China Association for Science and Technology(Grant No.YESS20200237),and the Special Fund for Basic Scientific Research of Central Universities(Grant No.22CX07007A). （42174138,42074133）
