功能型聚表剂对大庆原油乳化的影响
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摘要
乳化性能是反映功能型聚表剂提高采收率能力的重要参数。为确定功能型聚合物对大庆原油的乳化性能,进行了乳化实验。实验用的聚合物为大庆油田常用的海博Ⅰ型聚表剂、炼化Ⅰ型聚表剂和普通中分聚合物,原油、清水和污水取自大庆采油一厂。通过乳化设备制备不同聚合物浓度、不同剂油比条件下的乳状液,测量不同条件下乳状液的析水量,对3种聚合物的乳化能力进行对比分析。研究表明:相对于普通中分聚合物,聚表剂具有较好乳化原油能力;随着聚表剂浓度的增加,析水率逐渐降低,乳状液越来越稳定;当聚表剂浓度大于临界浓度时,黏度上升的趋势非常明显,相应的乳状液聚并速度明显变慢;乳化能力最好的聚合物为聚表剂海博Ⅰ型。
The emulsifying ability of functional polysurfactant is an important parameter to evaluate the capacity of enhancing the recovery. In order to determine the emulsifying properties of the functional polymer to Daqing crude oil,the emulsifying experiment was carried out. The polymers used in the experiment are three kinds of the polymer commonly adopted in Daqing Oilfield: Haibo Type-I polysurfactant,Refining Type-I polysurfactant and the ordinary medium-molecule-mass polymer,the crude oil,fresh water and sewage are taken from Daqing No. 1 Oil Production Plant. The emulsion was prepared by the emulsifying equipment under the conditions of different polymer concentrations and different agent-oil ratios,the amount of the water bleeding from the emulsion was measured under different conditions,and moreover the emulsifying abilities of these three kinds of the polymer were compared and analyzed.The study shows that the polysurfactants have much better oil emulsifying capability than the ordinary one; with the rise of the polysurfactant concentration,the water bleeding rate decreases gradually,and the emulsion becomes more and more stable; when the concentrations of the polysurfactants are greater than the critical concentrations,the tendency of the viscosity increase is very obvious,and the corresponding emulsion aggregation speed is significantly slower; the polymer with the best emulsifying ability is Haibo Type-I polysurfactant.
The emulsifying ability of functional polysurfactant is an important parameter to evaluate the capacity of enhancing the recovery. In order to determine the emulsifying properties of the functional polymer to Daqing crude oil,the emulsifying experiment was carried out. The polymers used in the experiment are three kinds of the polymer commonly adopted in Daqing Oilfield: Haibo Type-I polysurfactant,Refining Type-I polysurfactant and the ordinary medium-molecule-mass polymer,the crude oil,fresh water and sewage are taken from Daqing No. 1 Oil Production Plant. The emulsion was prepared by the emulsifying equipment under the conditions of different polymer concentrations and different agent-oil ratios,the amount of the water bleeding from the emulsion was measured under different conditions,and moreover the emulsifying abilities of these three kinds of the polymer were compared and analyzed.The study shows that the polysurfactants have much better oil emulsifying capability than the ordinary one; with the rise of the polysurfactant concentration,the water bleeding rate decreases gradually,and the emulsion becomes more and more stable; when the concentrations of the polysurfactants are greater than the critical concentrations,the tendency of the viscosity increase is very obvious,and the corresponding emulsion aggregation speed is significantly slower; the polymer with the best emulsifying ability is Haibo Type-I polysurfactant.
引文
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[11]董杰,岳湘安,孔彬,等.表面活性剂乳化能力差异对低渗油藏提高采收率的影响[J].石油与天然气化工,2018,47(2):79-84.DONG Jie,YUE Xiang’an,KONG Bin,et al. Effects of emulsifying capacity of surfactant on enhanced oil recovery in low permeability reservoirs[J]. Chemical Engineering of Oil&Gas,2018,47(2):79-84.
[2]王德民.发展三次采油新理论新技术,确保大庆油田持续稳定发展(下)[J].大庆石油地质与开发,2001,20(4):1-6.WANG Demin. Development of new theories and technologies for tertiary oil recovery to ensure sustained and stable development of Daqing Oilfield(PartⅡ)[J]. Petroleum Geology&Oilfield Development in Daqing,2001,20(4):1-6.
[3]王洋.聚表剂性能评价及驱油实验研究[D].大庆:大庆石油学院,2010:13-15.WANG Yang. Performance evaluation and oil displacement experimental study of polymer surfactant[D]. Daqing:Daqing Petroleum Institute,2010:13-15.
[4]闫丽萍.新型驱油剂聚表剂的特性及驱油机理研究[J].长江大学学报,2014,47(26):110-112.YAN Liping. Study on the properties and oil displacement mechanism of new oil displacement agent[J]. Journal of Yangtze University,2014,47(26):110-112.
[5]任刚,李宜强,余昭艳,等.聚表剂/S二元复合体系评价及驱油实验[J].断块油气藏,2015,22(5):623-626.REN Gang,LI Yiqiang,YU Zhaoyan,et al. Properties evaluation of surface-active polymer-surfactant and oil displacement experiment[J]. Fault-Block Oil&Gas Field,2015,22(5):623-626.
[6]陈成,刘海燕,赵秀丽.驱油用聚表剂乳化性能评价方法[J].广东化工,2014,41(12):7-9.CHEN Cheng,LIU Haiyan,ZHAO Xiuli. Emulsifying performance evaluation method for polymer surfactant for oil displacement[J].Guangdong Chemical Industry,2014,41(12):7-9.
[7]张丽庆,孔燕,吕晓华,等.河南油田聚表剂性能评价[J].精细石油化工进展,2014,15(13):11-14.ZHANG Liqing,KONG Yan,LXiaohua,et al. Performance evaluation of polymer-surfactant in Henan Oilfield[J]. Advances in Fine Petrochemicals,2014,15(13):11-14.
[8]隋彦芬,李凯.聚表剂乳状液特性研究[J].内蒙古石油化工,2016,42(6):15-17.SUI Yanfen,LI Kai. Study on the emulsion characteristics of the polysurfactant[J]. Inner Mongolia Petrochemical Industry,2016,42(6):15-17.
[9]张作安,张谦为.聚表剂驱采油技术研究与应用现状[J].石化技术,2017,24(5):197.ZHANG Zuoan,ZHANG Qianwei. Research and application status of polymer-surfactant drive oil recovery technology[J]. Petrochemical Industry Technology,2017,24(5):197.
[10]刘鹏,王业飞,张国萍,等.表面活性剂驱乳化作用对提高采收率的影响[J].油气地质与采收率,2014,21(1):99-102.LIU Peng,WANG Yefei,ZHANG Guoping,et al. Study of emulsification effect on oil recovery in surfactant flooding[J]. Petroleum Geology and Recovery Efficency, 2014, 21(1):99-102.
[11]董杰,岳湘安,孔彬,等.表面活性剂乳化能力差异对低渗油藏提高采收率的影响[J].石油与天然气化工,2018,47(2):79-84.DONG Jie,YUE Xiang’an,KONG Bin,et al. Effects of emulsifying capacity of surfactant on enhanced oil recovery in low permeability reservoirs[J]. Chemical Engineering of Oil&Gas,2018,47(2):79-84.