【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。更多还原

【Abstract】 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.更多还原