摘要
AVO分析的基础是反射振幅随偏移距的变化而变化 ,实践证明 AVO异常在利用地震资料确定天然气方面具有重要意义 ,而在 AVO的研究中泊松比是直接检测油气的一个极为重要的参数。我们以 Shuey(1985 )的近似方程为基础 ,用改进的 Marquart方法来反演目的层的泊松比及界面上下层的泊松比差。这样 ,一旦获得泊松比 ,便可估算 S波速度、孔隙度及杨氏模量等弹性参数 ,从而进行岩性解释和储层描述。
The basis of AVO is reflection amplitude variation with the offset ,it has been confirmed that the abnormality of AVO is of importance to the identification of natural gas.Possion ratio is a very important parameter in the study of AVO .So we apply the Shuey's approximate equation and modified Marquart algorithm to the inversion of the average Possion ratio and their difference of the target event .After obtaining the Possion ratio,we can estimate such elastic parameters as the velocity of S- wave,porosity and Young's modulus etc., and then perform the interpretation of lithology and description of reservoir.
出处
《矿物岩石》
CAS
CSCD
北大核心
2001年第1期86-90,共5页
Mineralogy and Petrology
基金
自然科学基金项目! (项目编号 :498740 3 0 )
