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

作　　者：李晶辉 刘玉国 厉通 郭波 王俊豪 LI Jinghui;LIU Yuguo;LI Tong;GUO Bo;WANG Junhao(Petroleum Engineering Technology Research Institute,Northwest Oil and Gas Company,Urumqi 830011,China;Oil and Gas Field Chemistry Institute,China University of Petroleum(East China),Qingdao 266580,China)

机构地区：[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

出　　处：《石油化工》2025年第3期379-386,共8页Petrochemical Technology

摘　　要：针对缝洞油藏条件和地层岩石表面带正电的特点,选择不同碳链长度的甜菜碱、羟磺基甜菜碱及阳离子表面活性剂进行静态洗油能力评价和物理模拟评价。实验结果表明,表面活性剂碳链长度相近时,羧基甜菜碱、阳离子表面活性剂、羟磺基甜菜碱的洗油能力依次降低,其中,油酸酰胺基丙基二甲铵基羧基甜菜碱(OAB)的洗油性能最好,且OAB提高采出程度优于十八烷基三甲基氯化铵;水驱后注入表面活性剂闷井后再注水驱油,提高采出程度效果明显好于表面活性剂直接注水驱油。油井注小段塞OAB吞吐,OAB可以改变黏性滞留油赋存状态、疏通窄缝圈闭油,为后续水驱创造条件。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 

分 类 号：TE39[石油与天然气工程—油气田开发工程]