Sodium fatty alcohol polyoxyethylene ether carboxylate/cationic surfactant binary system for high‐salt oil reservoir

IF 1.6 4区 工程技术 Q3 CHEMISTRY, APPLIED Journal of Surfactants and Detergents Pub Date : 2023-08-07 DOI:10.1002/jsde.12701
G. Lu, Mengjun Mu, Heng Liu, Shuang Guo, Xutao Tang, Yongmin Zhang
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Abstract

High salinity has been a major challenge in oil recovery. Here, two binary systems composed of sodium fatty alcohol polyoxyethylene ether carboxylate (AECM) and cationic surfactants, cetyltrimethylammonium bromide (CTAB) and cetylpyridinium chloride (CPyCl) were developed. Their fundamental properties; namely, oil/water interfacial tension, wettability, emulsification, adsorption, and oil‐washing were investigated and compared. The results showed that both AECM–CTAB (4:6–7:3, m/m) and AECM–CPyCl (5:5–6:4, m/m) could decrease oil/water interfacial tension below 10−2 mN/m. Even the total salinity was close to 200,000 mg/L after 7 days of quartz sand adsorption, showing a good interfacial activity and excellent anti‐adsorption properties. All these compound drives could effectively change the wettability of the glass surface, which reduced the contact angle to a minimum of 54.76°. In addition, the emulsification time could reach up to 24 h at 85°C, with excellent emulsification performance at high temperatures. The oil washing efficiency could reach 74.68% after 48 h. According to our comprehensive analysis, the best formulation was obtained at AECM/CTAB ratio of 5:5.
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高盐油藏用脂肪醇聚氧乙烯醚羧酸钠/阳离子表面活性剂二元体系
高矿化度一直是石油采收率面临的主要挑战。本文建立了由脂肪醇聚氧乙烯醚羧酸钠(AECM)和阳离子表面活性剂十六烷基三甲基溴化铵(CTAB)和十六烷基氯化吡啶(CPyCl)组成的二元体系。它们的基本性质;也就是说,油水界面张力、润湿性、乳化、吸附和洗油进行了研究和比较。结果表明:AECM-CTAB (4:6-7:3, m/m)和AECM-CPyCl (5:5-6:4, m/m)均能将油水界面张力降低至10−2 mN/m以下;在石英砂吸附7天后,总矿化度接近20万mg/L,显示出良好的界面活性和优异的抗吸附性能。这些复合驱动都能有效地改变玻璃表面的润湿性,使玻璃表面的接触角最小达到54.76°。在85℃条件下乳化时间可达24 h,具有优良的高温乳化性能。48 h后洗油效率可达74.68%。综合分析得出AECM/CTAB比为5:5的最佳配方。
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来源期刊
Journal of Surfactants and Detergents
Journal of Surfactants and Detergents 工程技术-工程:化工
CiteScore
3.80
自引率
6.20%
发文量
68
审稿时长
4 months
期刊介绍: Journal of Surfactants and Detergents, a journal of the American Oil Chemists’ Society (AOCS) publishes scientific contributions in the surfactants and detergents area. This includes the basic and applied science of petrochemical and oleochemical surfactants, the development and performance of surfactants in all applications, as well as the development and manufacture of detergent ingredients and their formulation into finished products.
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