物探化探计算技术2012，Vol.34Issue(1)：7-11,5.
基于Gassmann方程岩石速倒转现象成因分析
摘要
Abstract
Gassmann effective medium theory is the most classic and most basic rock physicsr model. On this basis, the other equivalent model established greatly enriched media saturated rock elastic wave propagation theory. Gassmann theory is mainly used for dealing with the issue of fluid substitution, but fluid substitution always appear "reverse phenomena" under certain conditions. Interpreted as the porosity under a certain, fully gas-saturated rock velocity more than water-saturated, which is contrary to the result of physics rock laboratory test. Therefore, graphic analysis the cause of saturated rock speed reverse for different rock sample and well log data, found that the density difference of saturated rock is too large causes leading to reverse. AT the same time, the saturation of carbonate reservoir rocks were replaced by numerical simulation, the simulation results was consistent with the laboratory test data, only carbonate rocks of different porosity size. Therefore emphasizes on the importance of fluid substitution forward modeling, the actual value of fluid substitutions only under certain physical meaning.关键词
Gassmann等效介质理论/流体替换/成因分析/倒转现象Key words
gassmann effective medium theory/ fluid substitution/ cause analysis/ reverse phenomenon分类
天文与地球科学引用本文复制引用
林凯,钟结麟,贺振华,熊晓军..基于Gassmann方程岩石速倒转现象成因分析[J].物探化探计算技术,2012,34(1):7-11,5.基金项目
国家自然科学基金项目资助(40904035) （40904035）
