随机介质模型正演模拟及其地震波场分析

Modeling in random medium and its seismic wavefield analysis

中国地质大学地球物理系, 湖北武汉430074

Dept. of Geophysics, China University of Geosciences, Wuhan 430074, China

讨论了利用统计学方法对介质进行描述的二维随机介质模型的正演模拟问题,并对若干简单的模型进行了模拟计算。分析这些简单模型模拟结果的地震波场可以得出一些有意义的结论:储层中局部微观非均匀性对高分辨率地震资料有较大影响;高分辨率地震资料中的某些信息不能用常规方法进行分析时,可以尝试用随机介质模型理论进行分析,以得到较为正确的结论。

Constructing and modeling of 2-D random medium using statistical method is discussed and calculations on some simple random medium models were performed. From the calculated results, some important and interesting conclusions can be obtained. The data obtained from high-resolution seismic methods are distorted by local micro-heterogeneity in reservoir beds. When the classical interpretation methods can not get correct results for those data, one could try to use the random medium theory. It is shown that modeling and analysis of wavefield in random medium is a valuable content in seismics, especially for developing seismics.