基于HTI介质理论的纵波速度分析方法  

P-Wave Velocity Analysis Method Based on HTI Media Theory

作　　者：马昭军[1] 唐建明[1] 

机构地区：[1]中国石化西南分公司勘探开发研究院德阳分院,四川德阳618000

出　　处：《新疆石油地质》2010年第4期426-428,共3页Xinjiang Petroleum Geology

基　　金：国家科技攻关项目(2008zx05000-002);中国石化重点科技攻关项目(P09076-T01)

摘　　要：随着勘探精度的不断提高,各向同性介质理论已经不能满足宽方位和大偏移距地震资料速度分析和动校正的需要。针对宽方位纵波资料,讨论了水平对称轴横向各向同性介质各向异性速度分析方法。根据各向异性理论,给出了速度方位各向异性椭圆方程,并采用最小二乘拟合方法,得出了椭圆方程参数解。利用椭圆方程求出方位速度,并将该速度用于动校正处理。该方法已经用于川西HXC-GMZ地区的宽方位地震资料处理,取得了较好的效果。With the continuous improvement of exploration precision, the isotropic media theory can no longer meet the current velocity analysis and normal moveout （NMO） processing of wide-azimuth and far-offset seismic data. Using wide-azimuth P-wave seismic data, velocity analysis method based on horizontal transverse isotropy （HTI） media theory is discussed in this paper. According to anisotropic theory, velocity azimuth anisotropic elliptic equation has been obtained. The least-square fitting method has been applied to solve elliptic equation parameters. The azimuth velocity has been calculated by elliptic equation and used for NMO processing. The method has been applied to process the wide-azimuth seismic data in HXC-GMZ area in western Sichuan successfully.

关 键 词：纵波 水平对称轴横向各向同性介质 速度分析 方位 各向异性 

分 类 号：P631.443.2[天文地球—地质矿产勘探]