新疆石油地质

新疆石油地质 ›› 2006, Vol. 27 ›› Issue (4): 449-451.

• 油藏工程 • 上一篇    下一篇

CO2注入方式对芳48油藏开发效果的影响

赵明国1, 刘崇江1,2   

  1. 1.大庆石油学院 石油工程学院, 黑龙江 大庆 163318;
    2.中国石油 大庆油田有限责任公司 采油工程研究院, 黑龙江 大庆 163453
  • 收稿日期:2005-12-16 修回日期:2006-02-20 出版日期:2006-08-01 发布日期:2020-10-19
  • 作者简介:赵明国(1963-), 男, 辽宁台安人, 副教授, 油气田开发,(Tel) 0459-6503336(E-mail) zhaomingguo63@163.com.

The Effect of CO2 Injection Process on Production Response of Fang-48 Reservoir in Daqing Oilfield

ZHAO Ming-guo1, LIU Chong-jiang1,2   

  1. 1. Institute of Petroleum Engineering, Daqing Petroleum Institute, Daqing, Heilongjiang 163318,China;
    2. Research Institute of Production Engineering, Daqing Oilfield Company Ltd., PetroChina, Daqing, Heilongjiang 163453, China
  • Received:2005-12-16 Revised:2006-02-20 Online:2006-08-01 Published:2020-10-19

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摘要： 大庆油田芳48断块为特低渗透油藏,对该油藏进行了水驱、CO2驱、CO2吞吐、CO2转水驱、水驱转CO2驱等开采方式室内物理模拟研究。实验结果表明,该区块水驱见水早、含水率上升快、注水能力低。在上述5种气驱方式中,CO2吞吐后气驱的累积采收率最高,然后依次为水驱转CO2驱、气驱、CO2驱转水驱,CO2吞吐的累积采收率最低。从累积气油比来看,CO2吞吐累积气油比最高,其次为CO2驱,而水驱转气驱、气驱转水驱、吞吐转气驱的累积气油比较低。从气体注入能力来看,气驱的注入能力最高,而水驱转气驱、气驱转水驱的注入能力比较低。考虑开采效果和气体注入能力,芳48特低渗透油藏开采应优先选择CO2吞吐后气驱,其次为水驱转CO2驱。

关键词: 大庆油田, 低渗透油气藏, CO2, 开采方式, 物理模拟

Abstract: Fang-48 fault block in Daqing oilfield is a super low permeability oil reservoir. The physical modeling studies are conducted by processes of water flooding, CO2 flooding, CO2 stimulation, CO2-water alternate flooding, water-CO2 alternate flooding. The experimental results indicate that the water breakthrough is early, water cut rises rapidly and water injectivity is low. Among the processes of CO2 flooding, CO2 stimulation followed by CO2 drive allows the highest cumulative oil recovery factor, in turn declining for water-CO2 alternate flooding, CO2 drive, CO2-water alternate flooding, CO2 stimulation. In view of the cumulative gas-oil ratio, it is the highest for CO2 stimulation, in turn declining for CO2 drive, water-CO2 alternate flooding, CO2-water alternate flooding, CO2 stimulation followed by CO2 drive. In light of the CO2 injectivity, it is the highest for CO2 drive, in turn declining for water-CO2 alternate flooding, CO2-water alternate flooding. Considering the production response and the CO2 injectivity, the development scheme of Fang-48 fault block should be firstly the CO2 stimulation followed by CO2 drive, secondly by water-CO2 alternate flooding.

Key words: Daqing oilfield, low permeability reservoir, CO2, development scheme, recovery process, physical modeling

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