Walkaway VSP深度域叠前偏移成像  

A prestack depth migration method for walkaway VSP data

作　　者：王欣 印兴耀[1] 杨继东 

机构地区：[1]中国石油大学(华东)地球科学与技术学院,山东青岛266555

出　　处：《石油地球物理勘探》2016年第4期745-750,5,共6页Oil Geophysical Prospecting

基　　金：国家"973"计划项目(2013CB228604);国家科技重大专项课题(2011ZX05030-004-002;2011ZX05009-003)联合资助

摘　　要：本文从Helmholtz方程出发,推导了适用于Walkaway VSP波动方程叠前深度偏移的Fourier有限差分算子,并建立Walkaway VSP波动方程外推的流程。模型测试和实际资料处理结果表明,Walkaway VSP深度域叠前偏移成像方法既能适应速度场的剧烈变化,又可以保证对陡倾地层的成像效果,对复杂构造成像精确。From Helmholtz wave equation, we derive in this paper the Fourier finite difference operator of prestack depth migration for walkaway VSP data and built a corresponding processing flow. Both numerical model tests and real data processing results show that the proposed prestack depth migration method for walkaway VSP data is suitable not only for strong lateral velocity variation, but also can accurately image complex steep-dip structures. © 2016, Editorial Department OIL GEOPHYSICAL PROSPECTING. All right reserved.

关 键 词：Walkaway VSP Fourier有限差分算子 叠前深度偏移 

分 类 号：P631[天文地球—地质矿产勘探]