一考虑水包油乳状液的复合驱数学模型-自然科学版.PDF

2013年摇 第37卷摇 摇 摇 摇 摇 摇 中国石油大学学报(自然科学版)摇 摇 摇 摇 摇 摇 摇 摇 Vol.37摇 No.6 摇 第6期摇 摇 摇 摇 摇 摇 摇 摇 Journal of China University of Petroleum摇 摇 摇 摇 摇 摇 摇 摇 Dec.2013 摇 摇 文章编号:1673鄄5005(2013)06鄄0100鄄06摇 摇 摇 doi:10.3969/ j.issn.1673鄄5005.2013.06.016 一考虑水包油乳状液的复合驱数学模型 马德胜,刘皖露,王摇 强,孙盈盈 (中国石油勘探开发研究院提高石油采收率国家重点实验室,北京 100083) 摘要:通过考察乳化液在多孔介质中的渗流规律,建立考虑乳化作用的复合驱数学模型。 新模型既考虑水包油乳状 液的形成可提高驱替相流度的作用,又考虑乳化降低残余油的机制;建立相对渗透率和相黏度的描述方式;将物理 模型与数学模型结合,提出模型关键参数的获取方法。 结果表明,复合驱中乳化可有效起到降水增油的作用,随着 乳化性能增强,其降水增油能力也逐渐提升,但是增加的幅度逐渐减小。 关键词:乳化;数学模型;复合驱;相对渗透率曲线;残余油 中图分类号:TE319摇 摇 摇 文献标志码:A Mathematic model of alkali鄄surfactant鄄polymer (ASP) flooding with consideration of oil鄄in鄄water emulsion MA De鄄sheng,LIU Wan鄄lu,WANG Qiang,SUN Ying鄄ying (Research Institute of Petroleum Exploration and Development,State Key Laboratory of EOR,Beijing 100083,China) Abstract:Basedonthestudyonemulsionflowbehaviorinporousmedia,anew mathematicalmodelof alkali鄄surfactant鄄pol鄄 ymer (ASP)flooding wasestablished. Themechanismswereconsideredthatemulsioncanimprovethemobilityof displacing phase and emulsion also can reduce residual oil saturation in the new model. Accordingly,the description of choosing new relative permeability curve and modifying viscosity of displacing phase after emulsification was established. A laboratory methodwasproposedtoobtainthekeyparametersofthenewmodelwhichcombinedthephysicalmodelwiththemathematical model. The results show thatemulsificationof ASPfloodingcanreducethewatercutandincreaseoiloutputeffectively. This effectiveness increaseswith the increase of emulsifiability,but the rate of increase decreases gradually. Key words:emulsification;mathematical model;ASP flooding;relative permeability curve;residual oil [1鄄2] 摇 摇 研究 表明,复合体系在多孔介质中驱油的过 化机制的复合驱数学模型。 新模型既考虑乳化提高 程中,在相同驱替方式下乳化产生时的驱油