老油田二次开发与CO2驱油技术研究

分析了老油田提高采收率的必要性和可行性，阐述了老油田二次开发工程的基本概念和方法，讨论了CO2驱油的主要机理、驱油方式、驱油效率和国内外研究与试验进展，总结了老油田二次开发和CO2驱油技术的发展前景“二次开发”的核心是运用新理念和新技术重新构建老油田新的开发体系，大幅度挖掘老油田潜力和提高最终采收率，其技术路线是重构地质认识、重建井网结构、重组地面工艺流程。CO2驱油既能大幅度提高采收率，又能实现“碳埋存”和环境保护。二次开发与CO2驱油相结合，是未来中国石油提高采收率的发展方向与重点技术之一。

Research on Secondary Development of Old Oilfields and CO2 Flooding Technology

The necessity and feasibility of EOR in old fields were analyzed and the basic concept and approaches for old fields’secondary development were elaborated, including the main mechanism, mode and efficiency of CO2 flooding and the related researches and experimental progress at home and abroad, as well as the prospects of such secondary development and technologies for CO2 flooding. The core of secondary development or "redevelopment" is to rebuild new development systems by means of new development ideas and new technologies in order to substantially tap potentials and improve ultimate oil recovery of the old or maturing oilfields, including reconstructing the geological knowledge, the well pattern and ground technological process, etc. The practices show that CO2 flooding can not only improve the old oilfields’recovery, but also restore carbon and protect environment. The researches of related theories and technologies have been carried out effectively and shown good results at home and abroad. The combination of old field redevelopment and CO2 flooding is the trend of EOR and one of the key technologies in China in the future