利用Walkaway VSP和全方位地面地震数据求取各向异性参数

Application of walkaway VSP and full-azimuth surface seismic data in estimating anisotropic parameter

本文利用8方向WVSP和全方位地面地震数据研究松辽盆地北部的深部火成岩VTI和方位HTI特性,求解介质的各向异性参数,分析方位HTI介质的特点。认为在VTI假设基础上,根据8方向WVSP获得的方位HTI介质相对参数能够很好地描述介质的横向各向异性,通过与地面地震数据的对比研究发现,这种方位HTI介质相对参数也能够作为描述介质裂缝方向和强度的一种手段。

8 direction WVSP and full-azimuth surface seismic data were used to study the characteristics of the deep igneous rock VTI medium and azimuth HTI medium,the anisotropic parameters of the media were derived,and the characteristics of the azimuth HTI medium were analyzed.Based on the VTI assumption it is believed that the relative parameters of the azimuth HTI medium,which were acquired from the 8 direction WVAP data could accurately describe the lateral anisotropy of the medium,through correlation studies with surface seismic data,it is found out that the relative parameters of the azimuth HTI medium could be an effective means to describe the orientation and the strength of the fractures in the medium.