西南石油大学学报(自然科学版) ›› 2011, Vol. 33 ›› Issue (2): 133-136.

• 石油与天然气工程 • 上一篇    下一篇

特低渗透油藏 CO2 驱室内实验研究

刘淑霞   

  1. 中国石油大庆油田有限责任公司勘探开发研究院,黑龙江 大庆 163712
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2011-04-20 发布日期:2011-04-20

RESEARCH ON LABORATORY EXPERIMENTS OF CO2 DRIVE IN ULTRA-LOW PER-MEABILITY RESERVOIR

LIU Shu-xia   

  1. Research Institute of Exploration and Development, Daqing Oilfield Company Ltd., Daqing, Hei-longjiang 163712, China Journal of Southwest Petroleum University, Vol. 33, No. 2, 133 – 136, 20111674 – 5086,in Chinese
  • Received:1900-01-01 Revised:1900-01-01 Online:2011-04-20 Published:2011-04-20

摘要: 针对大庆外围油田特低渗透油藏剩余油潜力大、井网加密效益差、水驱采收率低等问题,提出了特低渗透油藏 CO2驱技术。通过细管实验和天然岩芯 CO2 驱油实验,确定了 CO2 与高台子油田原油的最小混相压力,评价了特低渗透砂岩油藏 CO2 驱油效果。实验结果表明,CO2 驱可以应用于高台子油田,并取得较好的驱油效果。当天然岩芯空气渗透率为0.58 mD 时,在水驱基础上,气驱可以进一步提高采收率 8% 以上,特低渗透油藏实施 CO2 驱油技术是可行的。

关键词: 特低渗透油藏, CO2 驱, 最小混相压力, 驱油实验, 大庆油田

Abstract: Aiming at the following problems in the ultra-low permeability reservoir in Daqing external field, such as big residual potential, poor infilling effect, low oil recovery ratio of water flooding, the CO2 flooding technology of the ultra-low permeability reservoir is put forward. Through the slim tube experiment and the CO2 displacement experiment of natural core, the minim miscibility pressure of CO2 and oil of Gaotaizi Oilfield is obtained. The displacement effects of CO2 flooding on ultra-low permeability reservoir are evaluated. Laboratory study results show that CO2 flooding can be applied in Gaotaizi reservoir, and good displacement effects can be obtained. When the air permeability of natural core is 0.51 mD, the CO2 flooding can enhance oil recovery for more than 8 percentages after water flooding. It is feasible to carry out CO2 flooding in ultra-low permeability reservoir.

Key words: ultra-low permeability reservoir, CO2 flooding, minimum miscibility pressure, displacement experiment, Daqing Oilfield

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