特种油气藏 ›› 2026, Vol. 33 ›› Issue (4): 98-104.DOI: 10.3969/j.issn.1006-6535.2026.04.013

• 油藏工程 • 上一篇    下一篇

原位微乳液驱体系配方参数优化实验

陈文林1,2, 曹瑞波1,2, 闫伟2, 姜国庆2, 刘海波2, 韩培慧1,2   

  1. 1.东北石油大学提高油气采收率教育部重点实验室,黑龙江 大庆 163318;
    2.中国石油大庆油田有限责任公司勘探开发研究院,黑龙江 大庆 163453
  • 收稿日期:2025-02-05 修回日期:2026-05-21 出版日期:2026-08-25 发布日期:2026-10-15
  • 通讯作者: 韩培慧(1963—),男,教授级高级工程师,1998年毕业于大庆石油学院采油工程专业,2009年毕业于中国地质大学(北京)油气田开发工程专业,获博士学位,现主要从事聚合物驱后提高采收率方面的教学与研究工作。
  • 作者简介:陈文林(1987—),男,高级工程师,2012年毕业于东北石油大学油气田开发工程专业,现主要从事聚合物驱后提高采收率技术研究。
  • 基金资助:
    中国石油科技专项“中高渗油田特高含水期大幅度提高采收率技术研究”子课题“分类油藏化学驱方案优化研究及试验”(2023ZZ22YJ04)

Experiments of formulation parameters optimization for an in-situ microemulsion flooding system

Chen Wenlin1,2, Cao Ruibo1,2, Yan Wei2, Jiang Guoqing2, Liu Haibo2, Han Peihui1,2   

  1. 1. Key Laboratory of EOR,Ministry of Education,Northeast Petroleum University,Daqing,Heilongjiang 163318,China;
    2. Exploration and Development Research Institute,PetroChina Daqing Oilfield Co.,Ltd.,Daqing,Heilongjiang 163453,China
  • Received:2025-02-05 Revised:2026-05-21 Online:2026-08-25 Published:2026-10-15

摘要: 为解决聚合物驱后油层剩余油饱和度低且高度分散等问题,根据表面活性剂构效关系,运用相行为实验、仪器检测及物理模拟等方法,研发了一种可原位形成中相微乳液的驱油体系,并对体系中延展型表面活性剂的疏水基团碳链、亲水基团类型、环氧丙烷(PO)/环氧乙烷(EO)数量及复配表面活性剂比例等配方参数开展优化研究。结果表明:主表面活性剂是具有10个EO单元和25个PO单元的双碳链C24延展型羧酸盐表面活性剂(APEC),兼具良好的疏水性能和经济性;最合适的辅表面活性剂为烷基苯磺酸盐表面活性剂(ABS),其与APEC结合后可在极低的盐度下产生超低的界面张力,呈温莎类型相行为特征且中相微乳液盐宽为0.20%,APEC与ABS复配最佳质量比为4∶6;该体系在油藏条件下可原位形成中相微乳液;水驱后原位微乳液驱采收率可达到45.9%,较弱碱三元复合驱高8.7个百分点。该研究为大庆油田聚合物驱后提高采收率新技术的研发提供了重要依据。

关键词: 微乳液驱, 相行为实验, 延展型表面活性剂, 中相微乳液, 提高采收率

Abstract: To solve the problems of low residual oil saturation and high dispersion after polymer flooding,based on surfactant structure-property relationships,phase-behavior experiments,instrumental tests and physical simulation were conducted.An oil-displacement system capable of forming a middle-phase microemulsion in situ was developed,and formulation parameters optimization research was conducted,including the hydrophobic-chain lengths of the extended surfactant,the type of hydrophilic group,the numbers of propylene oxide(PO)/ethylene oxide(EO)units,and the blending ratio of mixed surfactants.Results show that the primary surfactant is a double-tailed C24 extended carboxylate surfactant(APEC)containing 10 EO units and 25 PO units,which provides both favorable hydrophobic performance and cost effectiveness.The most suitable auxiliary surfactant is an alkylbenzene sulfonate surfactant(ABS).When combined with APEC,it generates ultralow interfacial tension at extremely low salinity,exhibits Winsor-type phase behavior,and provides a middle-phase microemulsion salinity window of 0.20%;the optimal mass ratio of APEC to ABS is 4∶6.The system can form a middle-phase microemulsion in situ under reservoir conditions.After waterflooding,in situ microemulsion flooding can improve recovery by 45.9%,which is 8.7 percentage points higher than weak-alkali alkaline-surfactant-polymer(ASP)flooding.This study provides an important basis for developing new post-polymer-flooding EOR technologies in Daqing Oilfield.

Key words: microemulsion flooding, phase behavior experiment, extended surfactant, middle-phase microemulsion, enhanced oil recovery(EOR)

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