致密油藏注CO_(2)防窜体系研究进展  

Research progress of anti⁃channeling system of CO_(2) injection in tight oil reservoirs

作　　者：付炳杰 刘锐[1,2,3] 陶阳 高石 蒲万芬 FU Bingjie;LIU Rui;TAO Yang;GAO Shi;PU Wanfen(Petroleum Engineering School,Southwest Petroleum University,Chengdu 610500,China;State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Chengdu 610500,China;Tianfu Yongxing Laboratory,Chengdu 610213,China;Oil Production Technology Institute of PetroChina Dagang Oilfield Company,Tianjin 300280,China)

机构地区：[1]西南石油大学石油与天然气工程学院,四川成都610500 [2]油气藏地质及开发工程全国重点实验室,四川成都610500 [3]天府永兴实验室,四川成都610213 [4]中国石油大港油田公司采油工艺研究院,天津300280

出　　处：《大庆石油地质与开发》2024年第1期33-41,共9页Petroleum Geology & Oilfield Development in Daqing

基　　金：国家自然科学基金项目“基于水/原油与水/岩石界面耦合的两亲二维纳米碳驱油研究”(42172347);国家自然科学基金项目“黏度可控的原位增黏体系构建及高效驱油机理研究”(U19B2010);国家自然科学基金项目“砾岩油藏复合驱协作增效聚−表二元体系的构建及微观驱油机理”(51904255)。

摘　　要：致密油藏注CO_(2)不仅可以实现增压、混溶、降黏等目的,也是CO_(2)就地埋存和高效利用的重要途径。受CO_(2)与原油流度差异,特别是储层非均质性的影响,致密油藏注CO_(2)极易沿优势通道(裂缝)窜逸,因此,CO_(2)防窜是实现CO_(2)埋存和高效排驱的关键。通过对致密油注CO_(2)防窜体系的国内外研究动态进行综述,对比评述了凝胶、聚合物、泡沫、表面活性剂的防窜机理,重点概述了CO_(2)响应性表面活性剂的类型、CO_(2)响应特征及智能暂堵机制,在此基础上对致密油注CO_(2)防窜体系的应用前景进行了展望。依据现阶段CO_(2)响应性表面活性剂在CO_(2)防窜体系的应用,提出了CO_(2)响应性表面活性剂在CO_(2)防窜体系的重点研究方向:①设计和研发具备超临界CO_(2)可溶性,开关乳液、囊泡、凝胶、“蠕虫状”胶束自组装及原油触发解组装3方面特点的CO_(2)响应性表面活性剂;②CO_(2)响应性表面活性剂在致密储层的渗流规律、对裂缝的封堵机制、原油触发的解堵机理等系列科学问题亟需系统性探讨和深入研究。Injecting CO_(2) into tight oil reservoirs not only can realize pressure increase,easy miscibility and viscosity reduction,but also is an important way of CO_(2) storage and usage.Due to difference in fluidity between CO_(2) and oil,especially the influence of reservoir heterogeneity,CO_(2) injected in tight reservoirs is prone to escape along domi⁃nant channels(fractures),thus anti-channeling of CO_(2) is a key challenge of efficient displacement.Domestic and in⁃ternational researches on anti-channeling of CO_(2) injection are reviewed to comparatively discuss the anti-channeling mechanism of gel,polymer,foam and surfactant,and summarize CO_(2) responsive surfactant types,CO_(2) response characteristics and smart temporary plugging mechanism.On this basis,application prospect of anti-channeling sys⁃tem of CO_(2) injection in tight oil reservoirs is analyzed.According to current application of CO_(2) responsive surfactant in anti-channeling system of CO_(2),key study direction is proposed:①design and develop CO_(2) responsive surfactants with characteristics of supercritical CO_(2) soluble,self-assembly of switching emulsion,vesicles,gel and wormlike micelles,and oil-triggered disassembly;②systematically discuss and further study series scientific subjects such as the flow law of CO_(2) responsive surfactant in tight reservoir,plugging mechanism of fractures,and oil-triggered deplugging mechanism.

关 键 词：致密油藏 CO_(2)响应 防窜体系 表面活性剂 提高采收率 研究进展 

分 类 号：TE357[石油与天然气工程—油气田开发工程]