基于综合判识与时变数值模拟的高渗条带定量描述方法

中高渗砂岩储层经过长期注水开发,局部区域会出现高渗透条带,造成大量注入水低效无效循环,使注水效率降低,研究高渗条带定量描述方法可改善特高含水油田开发效果,降低油田开发成本.从特高含水期高渗条带表征参数入手,分析各参数对高渗条带的影响作用,应用综合判识方法建立高渗条带综合判识指数计算模型,在时变地质模型以及数值模拟历史拟...

Quantitative Description Method of Relatively High-permeability Zone Based on Comprehensive Identification and Time-varying Numerical Simulation

The medium-high permeability sandstone reservoir has been developed by long-term water injection, and high-permeability zones appear in some areas, resulting in a large number of inefficient or invalid loops of injected water, which will reduce the water injection efficiency and increase the development cost of oilfields in high water cut period. Based on the characterization parameters of high-permeability zones in high water cut period, influence of various parameters are analyzed in this paper, after that a high-permeability zone comprehensive identification index calculation model is established by using the comprehensive identification method. By time-varying numerical simulation, high-permeability zone comprehensive identification index of each grid can be obtained. After determining high-permeability zone identification criteria through closed coreing well and dynamic monitoring data, different high-permeability zone can be described accurately. The description can provide a foundation for the design of the remaining oil potential tapping measures in high water cut period.