模糊综合评判法在层内生成CO_2调驱选井中的应用

The Well Selection of In-Situ Generation of Carbon Dioxide EOR by Fuzzy Comprehensive Judgment Method

油田后期近井地带污染严重、优势通道发育明显。层内生成CO_2调驱技术集调驱、解堵于一体,可以很好地解决这些问题。该技术的关键在于调驱井的选择。本文从影响调驱选井的静态指标、生产动态指标和动态监测指标出发,建立选井决策的层次评价指标体系,利用隶属函数对各个指标进行归一化,计算出各选井决策指标的综合评判因子,从而确定调驱井的适宜顺序。油田应用结果表明:该方法实现了定性和定量分析的结合,消除了选井决策对主观认识和现场经验的过分依赖,具有较好的推广应用价值。

In-situ generation of carbon dioxide profile control flooding in stratums is a new type of technology in profile control and flooding. It implements blocking removal and profile control flooding, which in turn alleviates serious pollution and the obvious development of dominant channels in oil field. In this paper, the evaluation index system of well selecting decision is established according to static index, performance index and dynamic monitoring index. Various indices are normalized through membership function and the comprehensive evaluation factors of each index are calculated, from witch, the most appropriate flooding well can be selected. The application to oilfields shows that this method realized the combination of qualitative and quantitative analysis, which eliminates the excessive reliance on the subjective understanding and field experience. Consequently, the value of the paper is high from the application viewpoint.