摘要
泊松比因其物理意义明确,区分岩性和流体的效果明显,作为最重要的岩石物理参数之一被广泛地应用于储层预测研究中。在实际应用中,泊松比参数的获取主要通过先反演得到纵波、横波速度之后的转化计算,误差累积明显。AVO近似方程是振幅类反演技术的理论核心,不同表达形式的AVO近似方程所突出的物理意义也不同。基于叠前AVA多参数同步反演理论,提出一种全新的AVO近似方程,利用该AVO近似方程推导出新的递推关系式同步反演出泊松比、纵波速度、密度等弹性参数。模型与实际应用分析均表明,同步反演得到的泊松比参数有效地减少了因常规间接计算带来的累积误差,提高了储层预测精度。
Because of its clear physical meaning and better ability to identify lithology and fluid,Poission′s ratio as the most important one of rock physical parameters is widely applied in the reservoir prediction research.Poisson′s ratio was obtained mainly through transformation by the P and S wave velocity which should get firstly in the practical application.The accumulated error is obvious in that method.AVO approximate equation is the core of the amplitude inversion technique.Different expression form of AVO approximate equation outstand different meaning.Based on the Pre-stack AVA Multi-parameter Simultaneous Inversion theory,A new kind of AVO approximate equation is deduced,then new recursive formula also are deduced.Finally,Poisson′s ratio,p-wave velocity and density are obtained simultaneously.Model and practical application shows that the new method can effectively reduce the accumulated error brought by indirect calculation and can improve the accuracy in the reservoir prediction.
出处
《物探化探计算技术》
CAS
CSCD
2012年第3期283-287,238-239,共5页
Computing Techniques For Geophysical and Geochemical Exploration
关键词
AVO近似方程
泊松比
同步反演
储层预测
累积误差
AVO approximate equation
Poisson′s ratio
simultaneous inversion
reservoir prediction
accumulated error
