用地质地震资料计算复杂砂体储层厚度方法与应用实例

A method for complex sand reservoir thickness estimation using geologic and seismic data, and the application example.

在进行地质地震解释、油藏描述的过程中 ,对于厚度较大、沉积稳定、横向变化较小的储层 ,用传统的方法往往就能成功地得到较准确的地层厚度分布情况。但在储层厚度变化大、小断层发育的区域 ,尤其是在寻找河流相、湖相砂体分析岩层厚度分布时 ,传统算法效果不好。本文提出采用协克里金等多元统计分析技术 ,利用目标区内丰富的钻井数据和地震数据及其相关特征 ,预测或计算储层厚度真正的区域分布情况 ,得到了良好的油藏数据分布图件。

In interpretation and reservoir description, conventional method may be desirably used to ascertain the areal thickness of thick and stable hydrocarbon reservoir, but it fails to bring good effect in estimating the thickness values of complex hydrocarbon reservoir which has severe thickness variation and is cut by many minor faults, particularly in analysing the thickness values of river or lake-facies sand body. Multivariate statistical analysis method (Cokriging et al) can be taken to derive reservoir thickness values from drilling data, seismic data and their correlativity in the area. Good results have been obtained finally.