可动凝胶深部调驱候选井筛选方法研究

根据可动凝胶深部调驱机理,结合注水井和对应油井的静、动态特征,筛选出了用于确定最佳调驱井的指标体系,并采用变权的模糊综合评判方法进行多因素定量评价。结果表明,用渗透率非均质性、吸水剖面非均质性、吸水强度、井口压降曲线、含水-采出程度对应关系、油水井连通程度、油层未动用程度及沉积相特征等指标来筛选调驱注入井可提高选井的可靠性,保证可动凝胶深部调驱的效果。

Candidate Well Selection for In-depth Profile Control by Movable Gel Displacement

Based on the mechanism of in-depth profile control by using movable gel, in combination with static and dynamic characteristics of injection wells and corresponding wells, indication systems for optimal profile control and oil displacement wells are selected, an integral fuzzy evaluation method with variable weights is used to conduct a multi-variable quantitative evaluation. The result shows that injection wells for profile control are selected by using the indications of permeability heterogeneity, injection profile heterogeneity, water intake intension, wellhead pressure curve, correlation of water-cut recovery percent, degree of oil well and water well communication, unproducing extent of oil wells and character of sedimentary facies, by which reliability for well selection is improved, the effect of in-depth profile control by using movable gel is guaranteed.