二元复合驱采出液乳化行为及破乳影响因素  

Emulsification and Demulsification of Produced Liquid in Surfactant/Polymer Combination Flooding

作　　者：王志华[1,2] 柏晔 娄玉华 诸葛祥龙 Wang Zhihua;Bai Ye;Lou Yuhua;Zhuge Xianglong(College of Petroleum Engineering,Northeast Petroleum University,Daqing Heilongjiang 163318,China;Post-Doctoral Research Center,Daqing Oilfield Company Limited,Daqing Heilongjiang 163458,China;Daqing Oilfield Engineering Company Limited,Daqing Heilongjiang 163072,China;Oil Recovery Plant No.5,Daqing Oilfield Company Limited,Daqing Heilongjiang 163513,China)

机构地区：[1]东北石油大学石油工程学院,黑龙江大庆163318 [2]大庆油田博士后科研工作站,黑龙江大庆163458 [3]大庆油田工程有限公司,黑龙江大庆163072 [4]大庆油田有限责任公司第五采油厂,黑龙江大庆163513

出　　处：《石油化工高等学校学报》2018年第6期33-40,共8页Journal of Petrochemical Universities

基　　金：黑龙江省普通本科高等学校青年创新人才培养计划(UNPYSCT-2015074);中国博士后科学基金(2017M611349);黑龙江省博士后科学基金(LBH-216037)

摘　　要：表面活性剂/聚合物二元复合驱作为一种能够有效挖潜优质储量的提高采收率方法,其地面采出液处理工艺技术及运行参数的优化设计依然是该化学驱技术工业化推广面临的一项挑战。通过多因素正交实验考察了表面活性剂/聚合物二元复合驱采出液的乳化行为及其破乳脱水影响因素。显著性检验结果表明,与温度和含水率的影响相比,采出液中表面活性剂质量浓度和聚合物质量浓度对体系分散性和电负性影响的显著性值更低,反映了二者对采出液乳化稳定性有更大的贡献,从而导致采出液的破乳性能下降。结果表明,提高破乳温度、延长破乳时间的单一作用机制并不能从根本上提高该类采出液的脱水率和降低其分离后水中的含油量,同时,水相pH的提高与流场强剪切效应会进一步恶化破乳脱水效果及分离后水质。Surfactant/Polymer （SP） combination flooding is an effective method to enhance oil recovery of high quality reserves,while its surface produced liquid treatment technology and the simplification and optimization of operating parameters are both still a challenge for the promotion of the chemical flooding technology industrialization.In this paper,the emulsification of SP combination flooding produced liquid is characterized by multi-factor perpendicular experiments,and then the effect factors of demulsification and dehydration are studied.Significant test results indicated that,compared with the temperature and water cut,the effect of the concentration of surfactant and polymer in the produced liquid on dispersivity and electronegativity of the bulk was lower,which showed the greater contribution to emulsification stability of produced liquid,thus the demulsification of the produced liquid was declined.Bottle test experiments indicated that a single mechanism of improving demulsification temperature or prolonging demulsification time couldn’t fundamentally improve the dehydration rate of the produced liquid and reduce the oil content in the water after separation,meanwhile,the improvement of the pH of the water phase and the strong shear effect of the flow field would further deteriorate the effect of demulsification,dehydration and the water quality after separation.

关 键 词：乳化行为 破乳 显著性检验 正交实验 表面活性剂/聚合物驱 

分 类 号：TE866[石油与天然气工程—油气储运工程]