含倾斜定向排列裂隙介质纵波特征

英文篇名：STUDY ON THE P-WAVE CHARACTERS OF MEDIA WITH TILTED ALIGNED FRACTURE
中文刊名：物探与化探
英文刊名：Geophysical and Geochemical Exploration
作者：刘百红 ; 周巍 ; 马中高
英文作者：LIU Bai-hong ; ZHOU Wei ; MA Zhong-gao (Nanjing Institute of Geophysical Prospecting ; SINOPEC ; Nanjing 210014 ; China)
中文关键词：地震勘探 ; 裂隙介质 ; TTI介质 ; 各向异性
英文关键词：seismic exploration ; cracked media ; TTI media ; anisotropy
出版日期：2012-06-15
机构：中国石油化工股份有限公司石油物探技术研究院;
年：2012
期：03
出版单位：物探与化探

摘要

根据Schoenberg的含裂隙介质的线性滑移模型在弱各向异性近似条件下根据Bond变换获得了含倾斜定向排列裂隙介质的弹性系数矩阵。在将含倾斜定向排列裂隙介质视为倾斜横向各项同性(TTI)介质的基础上根据弱各向异性近似条件下TTI介质纵波相速度、弹性波阻抗以及反射系数的近似解析解,研究了裂隙倾斜角对含倾斜定向排列裂隙介质中纵波相速度、反射系数以及波阻抗的影响。研究发现含倾斜裂隙介质的纵波相速度、各向异性弹性波阻抗、反射系数三个参数具有类似方位各向异性特征:入射角大的时候,显示较强方位各向异性,但是这三个参数对入射角的依赖程度却不完全相同,反射系数对入射角的依赖程度最大。
According to Schoenberg's linear-slip model and Bond transform,the elatica tensor of tilted transform isotropic(TTI) media is getted.Consider the media that contains tilted aligned fracture as TTI media,and then the P-wave phase velocity,PP-wave reflection coefficients and anisotropic elastic impedance of the media with fracture are studied based on the approximate analysis formula of the P-wave phase velocity,PP-wave reflection coefficients and anisotropic elastic impedance of TTI media.P-wave phase velocity,PP-wave reflection coefficients and elastic impedance of the media with fracture are all display stronger anisotropy with bigger incidence angle,but PP-wave reflection coefficients is more sensitive to the incidence angle.

引文

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