摘要
针对常规泡排剂在非常规气藏排水采气过程中常面临适应性差等问题,合成了一种阳离子型双子表面活性剂(DEA),将其与椰油酰胺丙基甜菜碱(CAB)以及十二烷基硫酸钠(SDS)复配,经起泡和稳泡性能测试,构建出一种高性能三元混合物泡排体系。实验结果表明,该体系在SDS/DEA/CAB摩尔比为8∶2∶15、总量为15 mm时,泡沫性能最优,起泡体积可达到375 mL,半衰期为13.21 min。经携液率测试发现,一定含量凝析油可促进泡排剂体系携液性能的提升,凝析油含量为10%时,携液率高达51.5%,起泡率为100%;甲醇也对携液性能起促进作用,甲醇含量为50%时可将携液率、起泡率分别提升至41.2%和100%;三元体系耐盐性能较差,氨三乙酸三钠(NTA)的加入使得三元体系在矿化度为70 g/L时仍能稳定发泡和携液;三元体系耐温性较差,加入甲醇和十四醇,在25~70℃时,可将携液率提高至30.0%,起泡率提高至50.0%。最后,表面张力测试、泡沫微观结构观察也证实了三组分间存在协同效应。
To solve the issues of poor adaptability of conventional foaming drainage agents in the process of drainage and gas production in unconventional gas reservoirs,a cationic Gemini surfactant(DEA)was synthesized and compounded with cocoamidopropyl betaine(CAB)and sodium dodecyl sulfate(SDS)to prepare a high-performance ternary mixture foam system through the foaming and foam stabilizing performance tests.The results demonstrated that the mixture system exhibited optimal performance,the foaming volume reached 375 mL,and the half-life was 13.21 min when the molar ratio was 8∶2∶15 and the total concentration was 15 mm.It was found that a certain content of condensate oil enhanced the liquid-carrying performance of the SDS/DEA/CAB mixture through the test of the liquid-carrying efficiency.At a condensate oil content of 10%,the liquid-carrying efficiency reached an impressive 51.5%while maintaining a foaming efficiency of 100%.The addition of methanol also promoted the liquid-carrying performance,and the presence of 50%methanol could increase the liquid-carrying efficiency and foaming efficiency to 41.2%and 100%,respectively.The SDS/DEA/CAB mixture exhibited a mild salt resistance,while the introduction of trisodium aminotriacetate(NTA)significantly improved the salinity tolerance of the ternary mixture,which was effective even at a salinity level of 70 g/L.Additionally,the SDS/DEA/CAB mixture exhibited a mild temperature resistance,while the methanol and tetradecanol were added,the liquid-carrying efficiency and foaming efficiency could be increased by up to 30.0%and 50.0%,respectively,within a temperature range from 25℃to 70℃.Finally,synergy effects among SDS/DEA/CAB were confirmed through surface tension and foam morphological analysis.
作者
赵金省
康文超
吕红苗
董三宝
韩薇薇
ZHAO Jinsheng;KANG Wenchao;LYU Hongmiao;DONG Sanbao;HAN Weiwei(College of Petroleum Engineering,Xi’an Shiyou University,Xi’an 710065,China;School of Carbon Neutrality Future Technology,Xi’an Shiyou University,Xi’an 710065,China;School of Chemistry and Chemical Engineering,Xi’an Shiyou University,Xi’an 710065,China;Hubei Key Laboratory of Oil and Gas Drilling and Production Engineering,Yangtze University,Wuhan 430100,China)
出处
《非常规油气》
2025年第1期61-71,共11页
Unconventional Oil & Gas
基金
国家自然科学基金青年项目“输气管线中天然气水合物壁面沉积层失稳脱落机制研究”(52204046)
西安市科技计划项目-高校院所人才服务企业项目“新型耐温耐盐耐油超分子泡排剂体系构筑及泡沫特性调控机制研究”(23GXFW0078)
油气钻采工程湖北省重点实验室开放基金资助项目“智能响应型泡排剂体系构筑及其泡沫特性调控机理研究”(YQZC202413)。
关键词
排水采气
甜菜碱型表面活性剂
双子季铵盐表面活性剂
发泡性能
携液率
drainage and gas production
betaine-type surfactant
Gemini quaternary ammonium surfactant
foaming performance
liquid-carrying efficiency
作者简介
第一作者:赵金省(1979-),男,博士,教授,博士生导师,现主要从事油气藏提高采收率方面的研究工作。E-mail:jinsheng79317@163.com。
