AVO方法检测油气应用实例分析

Cases analysis of applying AVO to detect hydrocarbon

在油气勘探中,利用AVO方法能提取多种岩性属性剖面,通过AVO交会图可确定气层范围,因此AVO方法是一种非常实用的油气检测方法。本文简要介绍了Zoeppritz方程的Aki等和Shuey等近似式的主要应用,即求取λρ属性剖面和μρ属性剖面、P波阻抗剖面和S波阻抗剖面、法向入射反射系数剖面与梯度属性剖面,通过这三组剖面的交会图,可直观地分析油气层的位置。

Using AVO approach can detect multiple lithologic attributes sections and AVO crossplot can determine the scope of gas-bearing formation, which is very useful hydrocarbon detection method. The paper briefly introduced the major application of Aki etc.and Shuey approximation of Zoeppritz equation;that is computing product section of elastic module λ and density ρ;product section of elastic module μ and density ρ;P-wave and S-wave impedance section;normal-incident reflection coefficient section and gradient attribute section.The position of hydrocarbon reservoir can be directly analyzed by the crossplot of above three groups of sections.