宽方位纵波地震资料HTI各向异性校正方法研究与应用  

Study and application of HTI anisotropy moveout correction to wide azimuth P-wave seismic data

作　　者：贾福宗 李道善[1] 曹孟起[1] 李隆梅[1] 黄莉莉[1] 

机构地区：[1]中国石油天然气集团公司东方地球物理勘探有限责任公司研究院资料处理中心,河北涿州072751

出　　处：《石油物探》2013年第6期650-654,4,共5页Geophysical Prospecting For Petroleum

基　　金：国家科技重大专项(2011ZX05019-004)资助

摘　　要：在裂缝性地层的地震资料中常存在HTI各向异性的影响,主要表现在地震波振幅、速度、波形和相位随测线方位变化而发生变化。消除方位各向异性的影响以改善宽方位地震资料的成像效果,是目前宽方位地震资料处理中值得重视的一个问题。简要介绍了纵波方位各向异性基础理论,分析了HTI介质影响下地震纵波速度的方位各向异性现象;研发了纵波速度方位各向异性校正处理技术,形成了生产处理流程;针对某工区全方位采集地震资料的处理应用,较好地提高了成像质量。HTI anisotropy effect on seismic data in the fractured formations shows that the amplitude,velocity,waveform and phase of seismic wave vary along with azimuth of survey line.Eliminating azimuthal anisotropic effect for improving imaging quality is one of the aspects worthy for consideration in wide-azimuth seismic data processing.The basis theory about P-wave azimuthal anisotropy isbriefly introduced and the azimuthal anisotropy phenomenon of Pwave velocity for the affect of HTI media is analyzed.A P-wave azimuthal anisotropy correction technique is developed and the corresponding productivity processing workflow is formed.The workflow is applied to a full-azimuth seismic data processing and improves the imaging quality.

关 键 词：宽方位地震资料 HTI介质 方位各向异性 校正处理 成像质量 

分 类 号：P631.4[天文地球—地质矿产勘探]