论文详情

HTI介质饱和流体特性和裂缝密度对方位反射系数的影响

石油物探

2013年 52卷第No. 1期

阅读：91

Title

Influence of HTI medium saturated fluid properties and fracture density on azimuthal reflectivity

单位

1.中国石油大学(华东)地球科学与技术学院，山东青岛266580；2.中国石油大学(北京)地球科学学院，北

京102249

Organization

Li Chunpeng，School of Geosciences，China University of Pertroleum (East China)，Qingdao 266580，China

摘要

结合等效介质理论和Thomsen裂缝理论构建了饱和流体HTI介质弹性矩阵并推导出HTI介质弹性波反射

/透射方程，基于该方程讨论了流体类型及裂缝密度对方位反射系数的影响。模型试算结果表明：下伏

HTI介质饱含气和饱含水之间的方位反射系数差异比饱含油和饱含水之间的明显，饱含气和饱含水反射系

数的差异随着入射角增大而增大，随方位角增大而减小；裂缝密度越大反射系数越小，不同裂缝密度的

反射系数差异随着入射角和方位角增大而增大。研究结果为利用方位地震反射特征检测裂缝密度和流体

性质提供了理论依据。

Abstract

We build saturated fluid HTI medium elasticity matrix with equivalent medium theory and Thomsen fracture theory

，and derivate elastic wave reflection-transmission equation of HTI media.Based on the equation，we discuss how

fluid type and fracture density impact azimuth reflectivity.Model tests indicate that it is easier to distinguish

differences of azimuth reflectivity between gas and water layer than that of oil and water layer.Furthermore，the

larger incident angle causes the bigger reflectivity difference between gas and water layer and the larger azimuth

angle causes the smaller that of difference.When fracture density increases，reflectivity decreases.The larger

incident angle and the larger azimuth lead to the bigger reflectivity difference of different fracture density.The

research can provide theory basis for fracture and fluid detection by azimuth seismic reflection characteristics.

关键词：

HTI介质; 弹性矩阵; 反射/透射方程; 流体类型; 裂缝密度;

Keywords:

HTI medium; elasticity matrix; reflection-transmission equation; fluid type; fracture density;

基金项目

DOI

10.3969/j.issn.1000-1441.2013.01.001