摘要
本文讨论一种估算储层泊松比参数的新方法。这种方法利用Zoeppritz关于纵波反射系数的近似方程,对叠前地震数据进行反演来估算泊松比。利用该方法在南海一个已知的气田上进行实验的结果表明,它可以正确地判别储层流体的变化,预测气田的边界。此法的,有效性依赖下列条件:①具有一个保持振幅、高信噪比和高分辨率的CDP道集;②有较准确的速度资料;③求准入射角和透射角;④采取相邻的多点预测和横向综合的方法,力求选取各点的最佳拟合结果作为估计值。
A new method for estimating Poisson's ratio of a reservoir is presented. The method estimates Poisson's ratio by making prestack inversion of seismic data with the use of Zoeppritz's approximate equation of P-wave reflection coefficient. The result of the experiment made over a known gas field in South China Sea demonstrates that this method can be used predicate fluid variation in reservoir and the gas reservoir boundary. The effectiveness of this method depends on(1) the CDP gather that has preserved amplitudes, high signal-to-noise ratio and high resolution; (2) accurate velocity data; (3) accurate incident angle and transmission angle; and (4) the way that we make successive multi-point prediction and lateral comprchensive analysis so as to use the optimum fitting result as estimated value at each point.
出处
《石油地球物理勘探》
EI
CSCD
北大核心
1991年第3期267-281,408,共16页
Oil Geophysical Prospecting
关键词
ZOEPPRITZ方程
泊松比
流体成分
储层预测
Subject heading
Zoeppritz equation
Poisson's ratio
fluid content
reservoir prediction
