一种基于地震干涉测量的VSP资料波场重构及成像应用  

Wave field reconstruction method of VSP data based on seismic interferometry and imaging application

作　　者：梁上林 徐基祥[1] 孙夕平[1] 郭宏伟[1] 李凌高[1] 吕考考 LIANG Shang-lin;XU Ji-xiang;SUN Xi-ping;GUO Hong-wei;LI Ling-gao;LU Kao-kao(Research Institute of Petroleum Exploration and Development, Petrochina Beijing 100083, China)

机构地区：[1]中国石油勘探开发研究院,北京100083

出　　处：《地球物理学进展》2018年第3期1075-1080,共6页Progress in Geophysics

基　　金：国家油气重大专项--前陆冲断带及复杂构造区油藏成藏规律;关键技术及目标评价(2016ZX05003)资助

摘　　要：静校正和近地表速度建模是地震资料处理的重要组成部分.在近地表复杂区,静校正问题和近地表速度建模问题表现尤为突出.本文利用地震干涉测量在波场重构方面的优势,给出了一种同时避免静校正和近地表速度建模过程的方法,直接由重构的SWP波场来成像高陡构造.文中首先阐述了地震干涉测量的原理,给出了VSP波场向SWP波场重构的数学表达式;接着,采用几种不同的近地表模型,对比VSP波场向SWP波场重构的效果;最后,建立局部速度模型,直接利用重构的SWP波场进行偏移处理,完成高陡构造成像.模型试验结果表明该方法的可行性,有利于实现复杂地表区深层高陡构造的成像.Statics and near-surface velocity modeling are important parts of seismic data processing. In complex surface conditions,the problems of statics and near-surface velocity modeling are particularly prominent. This paper takes the advantage of seismic interferometry in wave field reconstruction, gives a method to automatically avoid both statics and near surface velocity modeling and images high-angle structure using reconstructed SWP wave field. This paper firstly describes the principles of seismic interferometry and gives mathematical expression of VSP to SWP wave field reconstruction. Secondly,we build several different nearsurface models to compare effects of wave field reconstruction.Finally,we directly use SWP wave field to image high-angle structure with a local velocity model. Model results show the feasibility of this method and it is conducive to deep imaging of high-angle structures.

关 键 词：静校正 近地表速度建模 地震干涉测量 波场重构 高陡构造成像 

分 类 号：P631[天文地球—地质矿产勘探]