阴离子型表面活性剂/叔胺复配泡沫的性质及CO_(2)/N_(2)响应性能  

Foam Property and CO_(2)/N_(2) Response Performance of Anionic Surfactant/Tertiary Amine Compound Foam

作　　者：刘冬梅 曾文广[1,2] 杨康 石鑫[1,2] 魏晓静 张腾方 孙霜青[4] LIU Dongmei;ZENGWenguang;YANG Kang;SHI Xin;WEI Xiaojing;ZHANG Tengfang;SUN Shuangqing(Engineering Technology Research Institute,Northwest Oilfield Branch Company,Sinopec,Urumqi,Xinjiang 830011,P R of China;Key Laboratory of Enhanced Oil Recovery in Carbonate Fractured-vuggy Reservoirs,Sinopec,Urumqi,Xinjiang 830011,P R of China;Petroleum Engineering Supervision Center,Northwest Oilfield Branch Company,Sinopec,Luntai,Xinjiang 841600,P R of China;School of Materials Science and Engineering,China University of Petroleum,Qingdao,Shandong 266580,P R of China)

机构地区：[1]中国石油化工股份有限公司西北油田分公司工程技术研究院,新疆乌鲁木齐830011 [2]中国石油化工集团公司碳酸盐岩缝洞型油藏提高采收率重点实验室,新疆乌鲁木齐830011 [3]中国石油化工股份有限公司西北油田分公司石油工程监督中心,新疆轮台841600 [4]中国石油大学(华东)材料科学与工程学院,山东青岛266580

出　　处：《油田化学》2022年第2期331-337,共7页Oilfield Chemistry

基　　金：国家自然科学基金面上项目“新型CO_(2)响应型耐温抗盐泡排体系的设计、作用机理和应用研究”(项目编号51874331)。

摘　　要：泡沫排水采气工艺中,泡沫到达地表后难以实现可控的消泡。为获得兼具稳定性及响应性的泡排体系,并明确在无机盐和油相环境下的适用性,将十二烷基硫酸钠(SLS)、十二烷基磺酸钠(SDS)和十二烷基苯磺酸钠(SDBS)分别与N-十二烷基-N,N-二甲基叔胺(C_(12)A)复配,研究了复配溶液的泡沫性能及无机盐和油相对复配体系的影响。针对泡沫性能较好的SLS/C_(12)A和SDS/C_(12)A复配体系进行了CO_(2)响应消泡以及N_(2)加热重新起泡实验,分析了复配泡沫的响应机理。结果表明,SLS/C_(12)A复配体系的泡沫性能最好,SDBS/C_(12)A的泡沫稳定性最差。SLS/C_(12)A复配体系的耐盐能力强,SDS/C_(12)A复配体系的抗油效果显著。两种复配体系均表现出较好的响应性和可逆性。通过消泡后溶液形态和表面张力的变化分析响应机理为:质子化的C_(12)A与表面活性剂静电吸引形成络合物,从溶液中析出,降低了溶液的表面活性,加速了泡沫的破碎。这对于不同环境油气田的表面活性剂体系选择具有一定的指导意义。In the foam drainage and gas recovery process,it is difficult to achieve controllable defoaming after the foam reaches earth surface.In order to obtain a foam discharge system with both stability and responsiveness,and clarify the applicability in inorganic salt and oil phase environments,sodium dodecyl sulfate(SLS),sodium dodecyl sulfate(SDS)and sodium dodecyl benzene sulfonate(SDBS)were compounded with N-dodecyl-N,N-dimethyl tertiary amine(C_(12)A),respectively.The foam property of the compound solution and the effect of inorganic salt and oil on the compound system were studied.For the SLS/C_(12)A and SDS/C_(12)A compound systems with better foam property,CO_(2) response defoaming and N_(2) heating re-foaming experiments were carried out,and the response mechanism of the compound foam was analyzed.The results showed that the foam property of SLS/C_(12)A compound system was the best,and the foam stability of SDBS/C_(12)A was the worst.SLS/C_(12)A compound system had strong salt tolerance,and SDS/C_(12)A compound system had significant oil resistance.Both compound systems showed good responsiveness and reversibility.The response mechanism was analyzed by the change of solution morphology and surface tension after defoaming.The protonated C_(12)A electrostatically attracted surfactant to form a complex,which precipitated from the solution.The surface activity of the solution was reduced and the breakage of the foam was accelerated.It had certain guiding significance for the selection of surfactant system in oil and gas fields with different environments.

关 键 词：阴离子表面活性剂 叔胺 CO_(2)响应 泡沫 

分 类 号：O647.1[理学—物理化学] O648.24[理学—化学]