定向裂缝对地震波速度和振幅影响的比较——实验结果分析  

DIFFERENT EFFECTS OF VERTICALLY ORIENTED FRACTURE SYSTEM ON SEISMIC VELOCITIES AND WAVE AMPLITUDE

作　　者：贺振华[1] 李亚林[1] 张帆[1] 黄德济[1] 

机构地区：[1]成都理工学院油气藏地质与开发工程国家重点实验室,四川成都610059

出　　处：《物探化探计算技术》2001年第1期1-5,共5页Computing Techniques For Geophysical and Geochemical Exploration

基　　金：国家重点基础研究发展规划项目! (G19990 43311);自然基金!项目(497742 40 )资助

摘　　要：利用垂直定向裂缝模型和 MTS岩石物性测试系统 ,测试了不同材料和不同状态裂缝模型的地震特征响应。对特征响应进行分析和比较后发现 ,虽然波的传播速度 ,振幅 ,吸收衰减 ,主频均可用来检测裂缝的特征参数 ,但是裂缝变化对振幅的影响远大于对速度的影响。因此 ,利用地震波的振幅、衰减等属性参数检测裂缝特征比利用速度参数更有效。Seismic responses to vertically oriented fracture models made of different material and under different temperature and various atmospheric pressure conditions were measured using MTS(a rock Mechanics Test System). From comparison and analysis of those seismic responses we find that many seismic characteristic parameters such as seismic velocity, amplitude, attenuation, spectrum etc. can be used to detect the fracture system, but the effect of vertically fracture system on seismic amplitude is much more effective than that on seismic velocity. Therefore, seismic amplitude as well as attenuation characteristic attribute may be much better than velocity one for the detection of the fracture system.

关 键 词：定向裂缝 地震波速度 振幅 模型 地质勘探 地震特征响应 

分 类 号：P631.41[天文地球—地质矿产勘探]