石油化工2025，Vol.54Issue(3)：379-386,8.DOI:10.3969/j.issn.1000-8144.2025.03.012
高温高盐碳酸盐岩油藏油井吞吐洗油用表面活性剂研究
Investigation on surfactants for oil displacement of oil wells through huff and puff technique in high-temperature and high-salinity carbonate reservoirs
李晶辉 1刘玉国 1厉通 2郭波 1王俊豪2
作者信息
- 1. 西北油气分公司 石油工程技术研究院,新疆 乌鲁木齐 830011
- 2. 中国石油大学(华东)油田化学研究所,山东 青岛 266580
- 折叠
摘要
Abstract
In view of the conditions of fractured-vuggy reservoirs and the characteristic that the surface of formation rocks is positively charged,betaines and hydroxysulfobetaines with different carbon chain lengths,as well as cationic surfactants were selected to evaluate their static oil displacement capabilities and conduct physical simulation evaluations.The experimental results show that when the carbon chain lengths of the surfactants are similar,the oil displacement capabilities of carboxybetaines,cationic surfactants,and hydroxysulfobetaines decrease in turn.Among them,oleic acid amide propyl dimethyl ammonium carboxybetaine(OAB)has the best oil displacement performance,and the effect of OAB on enhancing the oil recovery is better than that of octadecyl trimethyl ammonium chloride.After water flooding,injecting surfactants,shutting in the well,and then conducting water flooding for oil displacement,the effect of enhancing the oil recovery is significantly better than that of directly injecting surfactants for water flooding during oil displacement.When injecting a small slug of OAB for huff and puff in oil wells,OAB can change the occurrence state of viscous retained oil and dredge the oil trapped in narrow fractures,thus creating conditions for subsequent water flooding.关键词
碳酸盐岩油藏/表面活性剂/提高采出程度/洗油能力Key words
carbonate reservoir/surfactant/enhanced oil recovery/oil displacement capability分类
石油、天然气工程引用本文复制引用
李晶辉,刘玉国,厉通,郭波,王俊豪..高温高盐碳酸盐岩油藏油井吞吐洗油用表面活性剂研究[J].石油化工,2025,54(3):379-386,8.
