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聚合物/降黏剂复合驱产液能力动态预测方法
姜颜波,刘璐,元福卿,潘玉萍,祝仰文,魏翠华,李峰
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(1.中国石化油田勘探开发事业部,北京100035;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;4.中国石化北京埕岛西项目部,北京100035)
摘要:
在聚合物/降黏剂复合驱过程中,由于注入的化学剂溶液黏度较高、渗流阻力大,相较于水驱阶段,注入化学剂后生产井的产液指数普遍下降,甚至难以达到预设的配产要求。目前尚没有一种明确的方法可以预测聚合物/降黏剂复合驱的产液能力,严重制约了稠油油藏化学驱技术在胜利油田的推广应用。基于数理统计原理和油藏数值模拟,首先以孤岛油田东区Ng3—4区块为例建立数值模拟模型,然后进行无因次产液指数影响因素研究,最后基于模拟结果建立无因次产液指数定量表征模型,形成了一套聚合物/降黏剂复合驱产液能力的动态预测方法。研究结果表明,所建立的无因次产液指数定量表征模型的数学形式简洁,模型中待定系数含义明确,提出的动态预测方法可以较好地拟合矿场实际动态数据。
关键词:  聚合物/降黏剂复合驱  无因次产液指数  数值模拟  数学模型  定量表征
DOI:10.13673/j.cnki.cn37-1359/te.2020.03.012
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”(2016ZX05011-003)。
Dynamic prediction method of liquid production capacity in polymer/viscosity reducer compound flooding
JIANG Yanbo,LIU Lu,YUAN Fuqing,PAN Yuping,ZHU Yangwen,WEI Cuihua,LI Feng
(1.Oilfield Exploration & Development Department,SINOPEC,Beijing City,100035,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;4.Project Department of Chengdaoxi,SINOPEC,Beijing City,100035,China)
Abstract:
Due to the relatively high viscosity of the injected chemical solution and high flow resistance,the test shows that the liquid production index in the polymer/viscosity reducer flooding after the injection of the chemical agent generally decreases compared with that in the water flooding stage,and it is difficult to meet the preset requirements. At present,there is no feasible method to predict the liquid production capacity in the polymer/viscosity reducer flooding,which seriously restricts the application of chemical flooding technology in heavy oil reservoirs in Shengli Oilfield. Based on the mathematical statistics and reservoir numerical simulation methods,a numerical simulation model is first established by taking Block Ng3-4 in the eastern part of Gudao Oilfield as an example. Then,the effects of factors on dimensionless liquid production index are investigated. Finally,a quantitative characterization model for the dimensionless liquid production index is established based on the simulation results,and the dynamic methods for the liquid production capacity in the polymer/viscosity reducer flooding are formed. The research results show that the quantitative characterization model for the dimensionless liquid production index is concise in mathematical form,and the meaning of the uncertain coefficients in the model is clear.The proposed dynamic prediction method can better fit the dynamic field data.
Key words:  polymer/viscosity reducer compound flooding  dimensionless liquid production index  numerical simulation  mathematical model  quantitative characterization

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