Travel time-difference analysis and parameter extraction for 3D VSP data and surface seismic data in anisotropic media
Sun Xiang-e1,2,3, Ling Yun1, Gao Jun1, Sun De-sheng1, Lin Ji-xiang1
1. Geophysical Technique Research Centre, BGP Inc. of CNPC, Zhuozhou City, Hebei Province, 072750, China;
2. Post-Doc Station of BGP Inc. of CNPC, Zhuozhou City, Hebei Province, 072750, China;
3. Electronics & Information School of Yangtze University, Jingzhou City, Hubei Province, 434023, China
Abstract：The target zone in this paper is above T4 (3200ms),the stratum-structure is relatively flat,and there is not much change for velocity field,and the faults and fractures develop in one direction,based on the hypotheses of VTI media and HTI media,the method of integrating 3D VSP data with surface seismic data to solve anisotropic parameters is studied in this paper,and the characteristics of the spatial change for HTI media was analyzed. The study results show that the media in the study area obviously have the VTI properties and HTI features,by estimating VTI anisotropic parameters and analyzing HTI spatial relative change,less seismic wave travel time difference was obtained. Based on consistence characteristic between space relative change for HTI media and space change for real fractures,the fracture reservoir can be effectively predicted.
孙祥娥, 凌云, 高军, 孙德胜, 林吉祥. 各向异性假设条件下三维VSP与地面地震数据旅行时差分析及参数求取[J]. 石油地球物理勘探, 2009, 44(6): 720-725.
Sun Xiang-e, Ling Yun, Gao Jun, Sun De-sheng, Lin Ji-xiang. Travel time-difference analysis and parameter extraction for 3D VSP data and surface seismic data in anisotropic media. OGP, 2009, 44(6): 720-725.
