扩展弹性阻抗反演在储层预测中的应用

Applications of EEI inversion in reservoir prediction

扩展弹性阻抗反演技术是油气勘探领域正在兴起的一项新技术,利用分角度叠加数据及横波、纵波、密度等测井资料,可以联合反演出与岩性、含油气性相关的多种弹性参数,用于综合判别储层的物性及含油气性。本文在简要论述叠前弹性波阻抗反演的基本原理及方法的基础上,给出了该方法的反演实例,指出了该方法的应用条件和关键步骤。对X地区含气砂岩的实例研究表明,扩展弹性阻抗反演对含气砂岩具有非常理想的分辨能力,能够可靠地识别含气砂岩的分布范围。

Extended elastic impedance inversion,a new technique combining of partial angle stack and P-wave,S-wave and density logging data in the realm of oil/gas exploration,can obtain more abundant elastic parameters associated with lithology and fluid for reservoir prediction and hydrocarbon detection.In this paper,a real case by this technique is introduced based on the concept and principle of the EEI,application conditions and the key steps are discussed.A field study of X area shows that EEI can discern gas sands and plot out the target area with high resolution and reliability.