三元复合驱采出液沉降处理室内实验研究  

Laboratory Study on Settlement Treatment of Production Fluid of Three Element Composite Flooding

作　　者：余男 曹广胜[1] 白玉杰 李世宁[1] 单继鹏 Yu Nan;Cao Guangshengl;Bai Yujie;Li Shining;Shan Jipeng(Key Laboratory of EOR, Ministry of Education, Northeast University of Petroleum, Daqing Heilongjiang 163318, China;NO.3 Oil Production Plant, Daqing Oilfield Company Limited, Daqing Heilongjiang 163318, China)

机构地区：[1]东北石油大学提高采收率教育部重点实验室,黑龙江大庆163318 [2]大庆油田有限责任公司第三采油厂,黑龙江大庆163318

出　　处：《石油化工高等学校学报》2018年第3期55-60,共6页Journal of Petrochemical Universities

基　　金：东北石油大学研究生创新科研项目(YJSCX2016-013NEPU)

摘　　要：三元复合驱采出液中离子矿化度较高,悬浮颗粒半径较大,原油乳化严重,形成了O/W型乳状液,体系黏度较大,成分较复杂,使三元采出液这种复杂的污水体系,在进行油水分离时,很难靠常规沉降处理方法达到较好的分离效果。通过室内沉降实验,研究三元复合驱采出液体系在不同沉降时间、沉降温度条件下的沉降效果,明确三元和聚合物驱体系混掺后沉降效果及技术界限。实验结果表明,三元采出液中混掺聚驱采出液有助于降低三元采出液中油水的分离难度,从混掺污水的水质特性分析,将三元采出液与聚驱采出液混掺,不但可以降低污水处理难度,而且更加有利于现有油田三元采出水处理工艺的稳定运行,且三元采出液与聚驱采出液的最佳混掺比1∶3,最佳混掺沉降时间界限为8h。The concentration of ions in the three element composite flooding is higher,the radius of the suspended particles is larger,the emulsification of the crude oil is serious,and the O/W emulsion is formed,which contains the polymer and the surface active agent.So,the viscosity of the three element composite flooding is larger and the composition is more complex.The above reasons make it difficult for the three yuan produced liquid to achieve better separation effect by conventional sedimentation treatment when oil and water separation is carried out.Through indoor sedimentation experiment,the settlement effect of the three surfactant polymer flooding under the conditions of different settling time and settlement temperature is studied,and effect and technical limits after mixing of three yuan and polymer flooding system are clearly defined.The experimental results show that three yuan of produced liquid in the blending of polymer flooding produced liquid,helps to reduce the three yuan produced liquid mixed with polymer flooding produced liquid is helpful to reduce the oil-water separation difficulty.From the analysis of water quality of mixed wastewater,the mixed three yuan extraction liquid and the polymer flooding recovery solution can not only reduce the sewage the treatment difficulty,but also be more conducive to the stable operation of the existing three yuan oilfield produced water treatment process.The optimum mixing ratio of three yuan production fluid and polymer flooding production fluid is 1∶3,and the optimum mixing settlement time limit is 8 h.

关 键 词：三元复合驱 采出液 沉降时间 乳化 

分 类 号：TE357[石油与天然气工程—油气田开发工程]