石油与天然气地质 ›› 2022, Vol. 43 ›› Issue (3): 717-723.doi: 10.11743/ogg20220320

• 方法技术 • 上一篇    下一篇

中国石化东部老油田提高采收率技术进展及攻关方向

张莉1,2()   

  1. 1.国家能源陆相砂岩老油田持续开采研发中心,北京 100083
    2.中国石化 石油勘探开发研究院,北京 100083
  • 收稿日期:2021-04-21 修回日期:2022-03-18 出版日期:2022-06-01 发布日期:2022-05-06
  • 第一作者简介:张莉(1974—),女,高级工程师,油藏工程与提高采收率技术。E?mail:sldzyzhli@126.com
  • 基金项目:
    国家自然科学基金项目(U20B6003)

Progress and research direction of EOR technology in eastern mature oilfields of Sinopec

Li Zhang1,2()   

  1. 1.Research and Development Center for the Sustainable Development of Continental Sandstone Mature Oilfield by National Energy Administration,Beijing 100083,China
    2.Petroleum Exploration and Production Research Institute,SINOPEC,Beijing 100083,China
  • Received:2021-04-21 Revised:2022-03-18 Online:2022-06-01 Published:2022-05-06

摘要:

针对中国石化东部老油田的油藏特点和开发矛盾,介绍了水驱、化学驱、稠油热采、CO2驱等不同开发方式下提高采收率技术的主要进展和矿场应用效果。水驱调整以局部注-采关系完善为主,配套工艺采取智能分注分采技术,特低渗油藏开展了压驱注水试验;化学驱形成了无碱二元复合驱和非均相复合驱技术并已工业化推广应用,研发了耐温、耐盐、抗钙镁驱油剂和驱油体系;稠油油藏发展了低效稠油降粘复合驱技术、深层特超稠油HDCS技术、浅层超稠油HDNS技术和深层稠油化学蒸汽驱技术;CO2驱针对中-高渗高含水油藏采取长效焖井+大段塞注入模式,针对低渗/特低渗油藏采取高压低速注入、异井水气交替注入模式,针对致密油藏采取异步周期注采模式。在上述技术进展分析的基础上,指出了不同类型油藏进一步提高采收率的攻关方向。

关键词: 特高含水, 高温高盐, 化学驱, 稠油热采, CO2驱油与埋存, 提高采收率

Abstract:

In view of the characteristics and challenges in developing the eastern mature oilfields of Sinopec, the study focuses on major progress made in research of enhancing oil recovery (EOR) technologies such as water flooding, chemical flooding, thermal recovery of heavy oil and CO2 flooding, and introduces the application effects. For water flooding, focus is put on improvement of local injection-recovery relation, being combined with separate intelligent separate-layer injection and production technology, and pressurized water injection experiment is carried out in ultra-low permeability reservoirs. For chemical flooding, the binary surfactant/polymer flooding and the heterogeneous phase combination flooding (HPCF) have been developed and applied, with calcium/magnesium-tolerant agents developed for oil reservoirs with high temperature and high salinity. In terms of heavy oil reservoirs, compound viscosity-reducing flooding has been implemented in reservoirs with low displacement efficiency, H(horizontal well)+D(viscosity reducer)+C(CO2)+S(steam) technology in deep ultra-heavy oil reservoirs, H (horizontal well)+D(viscosity reducer)+N(N2)+S(steam) technology in shallow ultra-heavy oil reservoirs, chemical steam flooding in deep heavy oil reservoirs. As for CO2 flooding, long-effect soaking and large slug injection technology has been put into effect in high-permeability reservoirs with high water cut; high-pressure and low-rate injection and alternate injection of water and gas from different wells in low permeability/ultra-low permeability reservoirs; and asynchronous cyclic injection and production in tight reservoirs. Analysis of the progress mentioned above serves for indicating the development direction of EOR promotion in different types of reservoirs.

Key words: ultra-high water cut, high temperature and high salinity, chemical flooding, thermal recovery of heavy oil, CO2 flooding and storage, enhanced oil recovery (EOR)

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