滩坝砂特低渗透油藏CO2驱油技术及应用

摘要/Abstract

摘要：

针对滩坝砂特低渗透油藏CO₂驱面临混相难、波及系数低等问题,综合运用地质学、渗流力学和油藏工程等理论和方法,采用物理模拟和数学模拟相结合的手段,制定了CO₂驱评价标准,明晰了CO₂驱提高采收率机理,形成了CO₂驱井网适配优化设计技术,优化了示范区高89-1块CO₂驱技术政策界限。实践表明,技术应用效果良好,截至目前,CO₂驱油与封存示范区累计注入CO₂ 2.8×10 ⁵ t,累计增油6.5×10 ⁴ t,封存CO₂ 2.6×10 ⁵ t。

关键词: 特低渗透油藏, CO₂驱, CO₂减排, 优化设计, 提高采收率

Abstract:

To solve the problems of difficult miscibility and low sweep coefficient in CO₂ flooding of ultra-low permeability beach-bar sand reservoir, theories and methods such as geology, seepage mechanics and reservoir engineering and by the combined methods of physical modeling and mathematical simulation are used to formulate the evaluation standard of CO₂ flooding, clarify the EOR mechanism of CO₂ flooding, form the optimum design technique adapted for the well pattern of CO₂ flooding, and optimize the policy limitation of CO₂ flooding in the demonstration zone Gao 89-1 block. It is indicated that the technology has been applied effectively. Up to now, over 2.8×10 ⁵ t of CO₂ have successfully been injected into the reservoir, and the cumulative oil increment is 6.5×10 ⁴ t, and 2.6×10 ⁵ t of CO₂ have been stored in CO₂ flooding and storage demonstration zone.

Key words: ultra-low permeability, CO₂ flooding, CO₂ emissions, optimal design, enhance oil recovery

中图分类号:

TE357

曹绪龙,吕广忠,王杰,张东. 滩坝砂特低渗透油藏CO₂驱油技术及应用[J]. 油气藏评价与开发, 2019, 9(3): 41-46.

Cao Xulong,Lyu Guangzhong,Wang Jie,Zhang Dong. Technology and application of CO₂ flooding in ultra-low permeability beach-bar sand reservoir[J]. Reservoir Evaluation and Development, 2019, 9(3): 41-46.

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参考文献 13

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滩坝砂特低渗透油藏CO₂驱油技术及应用

Technology and application of CO₂ flooding in ultra-low permeability beach-bar sand reservoir

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