用随机介质模型方法描述孔洞型油气储层

Description of the Carbonate Karst Reservoir with Random Media Model

孔洞型储集层具有强烈的非均质性,在空间分布上变化剧烈,规律性差,其地球物理参数(如速度、密度、弹性参数等)在空间上的变化很难用传统的层状介质模型进行刻画。本文借助随机模型方法,研究孔洞型储层中不同孔洞尺度、分布密度与模型参数的关系,建立反映实际孔洞油气储层介质地球物理参数空间分布统计特征的随机介质模型,以更方便地对孔洞型油气储层进行描述,并为碳酸盐岩孔洞型储层地震反射特征的研究提供有效的方法途径。

The geophysical parameters of the carbonate karst reservoir has a strong inhomogeneity and intensive spatial variation, which is difficult to be depicted by the conventional method used in layered medium situation. In this paper, the relation between the character of the karst reservoir and the parameters of the random model is discussed and the random medium model is established to describe the statistical character of the geophysical parameters distribution. The introduction of the random medium method provides a more effective approach for the research of the seismic reflection of the carbonate karst reservoir.