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稠油油藏降黏化学驱注入方式优化
胡渤,郑文乾,祝仰文,崔传智,元福卿,王萌
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(1.中国石化油田勘探开发事业部,北京100728;2.中国石油大学(华东)石油工程学院,山东青岛266580;3.中国石化胜利油田分公司勘探开发研究院,山东东营257015)
摘要:
降黏化学驱是稠油油藏蒸汽吞吐后的有效接替生产方式,其注入方式对开发效果影响较大。基于降黏化学驱的驱油机理,建立油藏数值模拟模型对蒸汽吞吐后降黏化学驱动态特征进行了分析,基于注采能力和开发效果对注入段塞顺序进行了优化,并基于净现值法建立了蒸汽吞吐后降黏化学驱注入参数的优化模型,将油藏数值模拟技术和粒子群算法相结合,求解获得最优注入参数。研究结果表明,蒸汽吞吐后降黏化学驱可以有效降低地层中原油的黏度,含水率在快速上升后出现明显的下降;先注降黏剂后注聚合物为最佳注入段塞顺序;通过优化,目标区块最优降黏剂质量分数为0.28%,最优聚合物的质量分数为0.32%,最优降黏剂注入量为0.40 PV,最优聚合物注入量为0.36 PV。优化结果可有效提高稠油油藏的开发效果,注入方式优化方法对指导稠油油藏蒸汽吞吐后降黏化学驱的开发实践具有重要的意义。
关键词:  稠油油藏  降黏化学驱  段塞顺序  注入参数  优化算法
DOI:10.13673/j.cnki.cn37-1359/te.2020.06.011
基金项目:国家科技重大专项“高温高盐油田化学驱提高采收率技术”(2016ZX05011003),中国石化科技攻关项目“整装油田特高含水期流场调控优化方法研究”(P16100)。
Optimization of injection method for viscosity reductionchemical flooding in heavy oil reservoirs
HU Bo,ZHENG Wenqian,ZHU Yangwen,CUI Chuanzhi,YUAN Fuqing,WANG Meng
(1.Exploration & Development Division,SINOPEC,Beijing City,100728,China;2.School of Petroleum Engineering,China University of Petroleum(East China),Qingdao City,Shandong Province,266580,China;3.Exploration and Development Research Institute,Shengli Oilfield Company,SINOPEC,Dongying City,Shandong Province,257015,China)
Abstract:
The viscosity reduction chemical flooding is an effective alternative production method after steam stimulation in heavy oil reservoirs,and its injection method has a great influence on the development effect. Based on the oil displacement mechanism of viscosity reduction chemical flooding,a reservoir numerical simulation model was established. The numerical simulation technology was used to analyze the characteristics of the viscosity reduction chemical flooding after steam stimulation. The injection slug sequence was optimized based on the injection and production capacity and the development effect. Based on the net present value method,an optimized model of injection parameters of the viscosity reduction chemical flooding after steam stimulation was established. The reservoir numerical simulation technology and particle swarm optimization algorithm were integrated to obtain the optimal injection parameters. The research results show that the viscosity reduction chemical flooding after steam stimulation can effectively reduce the viscosity of crude oil in the formation,and the water cut declines significantly after a rapid increase;the sequence of injecting viscosity reducer first and then polymer slug is the best;based on the optimization,the optimal mass fractions and injection volumes of the viscosity reducer and polymer in the target reservoir are 0.28%,0.32%,0.40 PV and 0.36 PV respectively. The optimization results can effectively improve the development effect of heavy oil reservoirs,and the method of injection optimization proposed in this paper is of great significance to guide the development practice of viscosity reduction chemical flooding after steam stimulation in heavy oil reservoir.
Key words:  heavy oil reservoir  viscosity reduction chemical flooding  slug sequence  injection parameter  optimization algorithm

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