摘要
为了在不额外增加投资、成本的情况下达到降水增油、降本增效的效果,采用注采耦合技术来改变地下压力场,强化弱波及区。目前国内外主要是通过数模和物模对注采耦合提高采收率机理研究及注采参数进行优化,但是针对剩余油的动用范围及动用程度的研究比较少,本文根据现河实际断块建立数值模拟模型,通过对压力梯度和压力变化进行分析,得到夹角控制剩余油的动用范围和动用程度,并且通过分析影响因素变化对注采耦合技术开发效果的影响,给出注采耦合技术的适用条件,为指导油田现场工作提供理论指导。结果表明:注采耦合条件下剩余油动用范围是稳定注水条件下动用范围的4倍左右。断层发育油藏水驱开发时,油井离断层越远、水井离断层越近,越适于用注采耦合技术开发;无边、底水油藏更适用于注采耦合技术开发;注采耦合技术对倾斜油藏具有很好的适应性。
To achieve the purpose of reducing water production,increasing oil production,cuting down cost and increasing efficiency without additional investment and cost,the injection-production coupling technique is adopted to change the underground pressure field and strengthen the weakly affected area.Currently,the studies on the mechanism of injection-production coupling and the optimization of injection-production parameters are mainly carried out by using mathematical models and material models at home and abroad.However,there are few studies on the utilization range and utilization degree of residual oil.In this paper,a numerical simulation model is established based on the actual fault block of Xianhe.Through the analysis of pressure gradient and pressure change,the utilization range and utilization degree of residual oil are obtained.Besides,by analyzing the influence of change of influencing factors on the development effect of injection-production coupling mode,the applicable conditions of injection-production coupling mode are given,which can provide theoretical guidance for oil field work.Results show that the operating range of residual oil under the condition of injection-production coupling is about 4 times that under the condition of stable water injection.In the fault reservoir water flooding development,the further the oil well is away from the fault,the closer the water well is to fault,and the more suitable the injection-production coupling is.Borderless and bottomless water reservoir is more suitable for the development of injection-production coupling mode.The injection-production coupling method has good adaptability to inclined reservoirs.
作者
崔传智
高敏
张戈
刘中伟
全宏
CUI Chuanzhi;GAO Min;ZHANG Ge;LIU Zhongwei;QUAN Hong(School of Petroleum Engineering,China University of Petroleum,Qingdao,Shandong 266000,China;Xianhe Oil Production Plant,SINOPEC Shengli Oilfield Company,Dongying,Shandong 257068,China)
出处
《中国科技论文》
CAS
北大核心
2018年第23期2648-2653,共6页
China Sciencepaper
基金
国家科技重大专项(2016ZX05011002-003)
关键词
注采耦合
动用范围
动用程度
适用条件
injection-production coupling
utilization range
utilization degree
applicable conditions
