基于流线数值技术的特高含水后期油田改良模拟研究  

Numerical simulation study of enhanced oil recovery in a highly water-cut late-stage oilfield based on streamline numerical techniques

作　　者：崔文富[1] CUI Wenfu(Shengli Oil Production Plant,Shengli Oilfield Company,Sinopec,Dongying 257400,Shandong China)

机构地区：[1]中国石化胜利油田分公司胜利采油厂,山东东营257051

出　　处：《粘接》2023年第9期123-127,共5页Adhesion

基　　金：中国石化科技攻关项目(项目编号:P20070-4)。

摘　　要：大角度转流线是特高含水后期油田改善开发效果的重要手段之一。以TS8区块为研究对象,利用流线数值技术开展了特高含水后期油田大角度转流线的数值模拟研究,分析了目标区块大角度流线调整前后剩余油的分布特征,从流线、压力梯度、构造形态、储层相对渗流阻力(饱和度)差异、工作制度等角度总结了已实施矿场井不见效的原因,并在此基础上开展了对策研究。结果表明:TS8区块的剩余油以形成流线但未有效驱替类为主;压力梯度是影响大角度转流线效果的主控因素,且大角度转流线后压力梯度应为0.03~0.04 MPa/m。将研究成果进行了矿场应用,油田含水下降1.5%,预测15年能够实现增油10.23万t,有效改善了注转采井的开发效果。研究成果为特高含水后期油田进一步提高采收率提供了一定的技术支持。Large-angle streamlines are one of the essential means to improve the development efficiency of highly water-cut late-stage oilfields.This study focuses on the TS8 block and conducts a numerical simulation of large-angle streamlines in highly water-cut late-stage oilfields using streamline numerical techniques.The research analyzes the distribution characteristics of remaining oil before and after the adjustment of large-angle streamlines in the target block.It summarizes the reasons for the ineffectiveness of some production wells from the perspectives of streamlines,pressure gradients,structural morphology,differences in reservoir relative permeability(saturation),and operating regimes.Based on this analysis,countermeasures are proposed.The results show that the remaining oil in the TS8 block is mainly in the form of stranded streamlines and is not effectively displaced.Pressure gradient is the key controlling factor affecting the effectiveness of large-angle streamlines,with the optimal pressure gradient after large-angle streamlines being 0.03~0.04 MPa/m.The research findings have been applied in the field,resulting in a 1.5%reduction in water cut in the oilfield and a projected incremental oil production of 102,300 tons over 15 years.This effectively improves the development efficiency of injection and production wells.The study provides technical support for further enhancing the recovery rate in highly water-cut late-stage oilfields.

关 键 词：特高含水后期 大角度 流线数值技术 采收率 

分 类 号：TE341[石油与天然气工程—油气田开发工程]