流体替换方法研究及应用分析  

Reseanch on fluid substiturtion method and its application

作　　者：周水生[1,2] 张波[1,2] 伍向阳[1] 

机构地区：[1]中国科学院地质与地球物理研究所,北京100029 [2]中国科学院研究生院,北京100049

出　　处：《地球物理学进展》2009年第5期1660-1664,共5页Progress in Geophysics

基　　金：国家高技术研究发展计划(863计划)专题项目(2oo6nAo6Z240)资助

摘　　要：流体替换即为从一种孔隙流体状态下的岩石物理参数计算出另一种流体状态下的岩石物理参数.流体替换对于地震属性分析具有重要作用,其为解释人员进行AVO(振幅随偏移距变化)及四维地震研究提供了正演模拟及定量分析的工具.通常流体替换都是采用基于wood方程的Gassmann流体替换方法.本文借鉴Patchy saturation模型,及Brie经验模型分别提出了针对流体不均匀分布的Patchy saturation模型流体替换方法,及基于经验关系的Brie经验模型流体替换方法.并基于岩石物理实验比较分析了以上三种流体替换方法.通过目标区岩石物理分析,可以从中优选出更合适的流体替换方法,从而为流体的地震响应分析提供正确的指导.Fluid substitution refers to prediction of rock physical parameters in rocks saturated with one fluid from rocks saturated with another fluid. Fluid substitution is an important part of seismic attribute analysis, because it provides the interpreter with a tool for modeling and quantifying various fluid scenarios which might give rise to an observed amplitude variation with offset （AVO） or 4D responses. Generally, fluid substitution applies the Gassmann fluid substitution method based on Wood＇s equation. In this paper, we consider the Patchy saturation model and Brie empirical model to propose the Patchy saturation fluid substitution method in response to uneven distribution of fluid and the Brie fluid substitution method based on experience respectively, and analysize the three kinds of methods based on rock physical experiments. Through the rock physics analysis of a target area, one can optimize more applicable fluid substitution method from them, so as to provide proper guidance for the seismic response analysis of fluid.

关 键 词：流体替换 岩石物理 Gassmann Patchy SATURATION Brie 

分 类 号：P313[天文地球—固体地球物理学]