一种环保型两性表面活性剂的制备及驱油性能评价  

Preparation and Oil Displacement Performance Evaluation of an Environmentally Friendly Amphoteric Surfactant

作　　者：李云[1] 袁凯涛 寇枫 李锦源 李先军 张秀英 LI Yun;YUAN Kaitao;KOU Feng;LI Jinyuan;LI Xianjun;ZHANG Xiuying(Shaanxi Yanchang Petroleum(Group)Co.,Ltd.,Xi'an Shaanxi 710065,China;Yanchang Oilfield Co.,Ltd.Dingbian Oil Production Plant,Yulin Shaanxi 718600,China;Shaanxi Yanchang Petroleum International Energy and Chemical Co.,Ltd.,Xi'an Shaanxi 710000,China;Changqing Oilfield Branch No.2 Gas Production Plant,Yulin Shaanxi 719000,China;Gepetto Petroleum Technology Group Co.,Ltd.,Chengdu Sichuan 610015,China;Oil Production Plant 3 of Qinghai Oilfield Branch,Mangya Qinghai 817000,China)

机构地区：[1]陕西延长石油(集团)有限责任公司,陕西西安710065 [2]延长油田股份有限公司定边采油厂,陕西榆林718600 [3]陕西延长石油国际能源化工有限公司,陕西西安710000 [4]长庆油田分公司第二采气厂,陕西榆林719000 [5]捷贝通石油技术集团股份有限公司,四川成都610015 [6]青海油田分公司采油三厂,青海茫崖817000

出　　处：《当代化工》2024年第12期2785-2790,共6页Contemporary Chemical Industry

基　　金：国家自然科学基金项目(项目编号:51874248)。

摘　　要：合成了一种新型环保型两性表面活性剂PASA,并系统评价其驱油性能。结果表明:PASA在油水界面上形成的吸附层能显著降低界面张力,当其质量浓度为0.01~1.00mg∙L^(-1)时,油水界面张力从42.5mN∙m^(-1)降低到29.2 mN∙m^(-1)。在抗盐性方面,PASA表现出良好的稳定性,即使在NaCl质量分数为5%的条件下,仍能保持较低的表面张力。润湿性实验显示,PASA能有效地改变岩石表面的润湿性,使其由亲油转向亲水。在岩心驱替实验中,当PASA质量浓度为10 mg∙L^(-1)时,提高采收率达到了31.3%。现场应用结果表明:注入PASA表面活性剂溶液后,受影响的油井日产油量显著增加,平均每注入1tPASA表面活性剂,可增加油田产量31.3t。A new environmentally friendly amphoteric surfactant PASA was synthesized,and its oil displacement performance was systematically evaluated.Research results showed that the adsorption layer formed by PASA on the oil-water interface could significantly reduce the interfacial tension.Within the mass concentration range from 0.01 mg·L^(-1) to 1.00 mg·L^(-1),the oil-water interfacial tension ranged from 42.5 mN·m^(-1) to 29.2 mN·m^(-1).In terms of salt resistance,PASA showed good stability and could maintain a low surface tension even at a NaCl mass fraction of 5%.Wettability experiments showed that PASA could effectively change the wettability of the rock surface,turning it from oil-wet to water-wet.In the core flooding experiment,when the PASA mass concentration was 10 mg·L^(-1),the enhanced oil recovery reached 31.3%.Field application results showed that after injecting PASA surfactant solution,the daily oil production of the affected oil wells increased significantly.On average,the injection of 1 t PASA surfactant could increase the oilfield production by 31.3 t.

关 键 词：表面活性剂 驱油效果 油水界面张力 稳定性 测量 界面 环保性能 采收率 

分 类 号：TQ423[化学工程] TE357.46[石油与天然气工程—油气田开发工程]