注CO2提高采收率技术现状及发展趋势  

Present situation and development trend of CO2 injection enhanced oil recovery technology

作　　者：李士伦 汤勇 侯承希 Li Shilun;Tang Yong;Hou Chengxi(State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China)

机构地区：[1]西南石油大学油气藏地质及开发工程国家重点实验室

出　　处：《油气藏评价与开发》2019年第3期1-8,共8页Petroleum Reservoir Evaluation and Development

基　　金：四川省教育厅创新团队计划“温室气体CO2埋存与资源化利用”(16TD0010);四川省科技计划项目“特低渗透油藏CO2驱微观渗流理论及影响机制研究”(2019YJ0423)

摘　　要：注CO2驱提高原油采收率及温室气体地质埋存前景广阔。回顾国内外CO2驱发展历程及简况,分析CO2非混相驱及CO2吞吐发展现状,总结了CO2驱相态、驱油机理评价以及CO2驱油藏工程优化设计技术,CO2驱油藏工程设计重点在于提高驱油效率和波及效率,控制黏性指进和气体突破,实现混相或近混相驱,结合油藏特征优化井网和注入参数。指出CO2近混相驱和提高波及体积是CO2驱发展趋势。水气交替、泡沫驱、裂缝封堵及局部重力驱是防气窜的重要手段。在总结国内外目前CO2驱技术及现场经验基础上,针对不同类型油藏特征做好CO2驱与CO2地质埋存相结合的顶层设计。There are broad prospects of CO2 flooding for enhancing oil recovery and greenhouse gas storage. In this paper, we re. viewed the development history and brief situation of CO2 flooding at home and abroad, analyzed the development status of CO2 im. miscible flooding and CO2 huff and puff, and summarized the phase state of CO2 flooding, oil displacement mechanism evaluation and optimization design technology of CO2 flooding reservoir engineering. The design focused on improving oil displacement effi. ciency and sweep efficiency, controlling viscosity index and gas breakthrough, achieving miscible or near-miscible flooding, and optimizing well pattern and injection parameters in combination with reservoir characteristics. It was pointed out that CO2 near-mis. cible flooding and increasing sweep volume were the development trends of CO2 flooding. WAG, foam flooding, fracture sealing and local gravity flooding were important means to prevent gas channeling. On the basis of summarizing the current CO2 flooding tech. nology and field experience at home and abroad, the top-level design of combination of CO2 flooding and CO2 geological storage should be done according to different types of reservoir characteristics.

关 键 词：CO2驱 提高采收率 CO2吞吐 防气窜 现状及趋势 

分 类 号：TE341[石油与天然气工程—油气田开发工程]