摘要
理论和实践已证明,地层中广泛存在着各向异性.研究地层的各向异性,并利用它来提取用各向同性理论无法获得或更为精确地获得某些岩性信息,是一项非常有意义的课题,其中各向异性对AVO的影响是其中的一个重要的内容.本文主要从Kelvin-Christoffel方程出发推导出VTI介质中反射与透射系数的计算式,并通过对反射系数与各向异性参数之间的关系式的分析和模型计算来讨论各向异性对AVO的影响,并对计算结果进行了对比分析,最后通过实例说明其应用.
In the practical exploration and test, we find that Anisotropy exists extensively in the Earth. It is of great significance studying the anisotropy of the Earth medium. This can get more accurately information about lithology in order to service for the search of oil-gas. It is one of the important content to study the influence of anisotropy on reflect amplitude. The calculation formula of reflection coefficient and transmission coefficient in VTI medium are derived from Kelvin-Christoffel equation in this paper. Trough analysis and calculation of the relation between reflection coefficient and the anisotropy parameter, the influence of anisotropy on AVO is discussed.
出处
《地球物理学进展》
CSCD
北大核心
2011年第1期257-262,共6页
Progress in Geophysics
基金
交通部西部交通建设科技项目(200231800021)
湖南省科技计划资助项目(05SK3077)联合资助
关键词
VTI介质
AVO
相速度
反射系数
慢度面
VTI medium, AVO, phase velocity, reflection coefficient, slowness sur{ace
