低渗透油藏二氧化碳混相驱注采方式研究——以克拉玛依油田X区克下组低渗透油藏为例
作者:
作者单位:

作者简介:

通讯作者:

中图分类号:

P618.13

基金项目:

国家科技重大专项(2016ZX05016-004)资助。


Optimum selection of injection-production method for carbon dioxide miscible flooding in low permeability reservoirs: Taking the low-permeability reservoirs of the Kexia Formation in the X zone of the Karamay Oilfield as an example
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    研究目的】克拉玛依油田X区克下组低渗透油藏存在物性差、水驱开发采收率低等问题,影响了油田的可持续发展。CO2是全球变暖的主要成分,世界各国都在想方设法减少CO2的排放量,本文试图利用CO2驱油气方式提高该油藏的采收率,变害为利。【研究方法】文章选取研究区60余口取心井目标层位岩心样品,开展扫描电镜及压汞测试分析等研究,系统梳理储层孔隙结构特征。采用油藏数值模拟方法对CO2连续气驱与CO2水气交替驱参数进行了优选,对比了各种开发方式的驱油效果。【研究结果】最后得到了最优的驱油方案:采用CO2水气交替驱方法,15口井连续注气4年后全部转水气交替注入,气水比为2:1;气水比10年后调整为1:1。数值模拟预测,注气开发15年,预测最终采收率将提高30%。【结论】通过现场试注结果表明,试采效果注气后产油量较水驱阶段有明显提高,试采效果注气后产油量是水驱阶段的1.85倍,有明显提高,对实现老区稳产和油田可持续发展具有十分重要的意义。

    Abstract:

    This paper is the result of oil and gas exploration engineering.
    [Objective] The low-permeability reservoirs of the Kexia Formation in the X zone of the Karamay Oilfield have problems such as poor physical properties and low waterflooding development and recovery, which affect the sustainable development of the oilfield. CO2 is the main component of global warming, every country in the world is trying to reduce its content in the atmosphere. This research attempts to use CO2 to drive oil and gas to increase the oil production rate in this reservoir and turn bane into a boon.[Methods] According to the core samples of the Lower Karamay formation from more than 60 coring wells in the test area, combined with the data of SEM and mercury injection test, the reservoir characteristics are systematically studied, and the pore structure characteristics of low-permeability sandstone reservoir are clearly studied. Using reservoir numerical simulation technology, the injection and production parameters of CO2 water-gas alternating flooding (CO2-WAG) and CO2 continuous gas flooding were optimized, and on this basis, the two development modes were compared.[Results] The optimum technical scheme is obtained:using CO2 water-gas alternating flooding technology, 15 wells are injected with water-gas alternately after 4 years of continuous gas injection. The gas-water ratio is 2:1, the gas-water ratio is 1:1 after 10 years. The numerical simulation predicts that the final recovery rate is increased by more than 30% after 15 years of gas injection development.[Conclusions] Experiments show that the oil production after gas injection is 1.85 times that of water injection. The output is increased. It is of great significance to achieve stable production in the old oilfieldsand sustainable development of the oilfield.

    参考文献
    相似文献
    引证文献
引用本文

李玮,师庆三,董海海,侯锐. 低渗透油藏二氧化碳混相驱注采方式研究——以克拉玛依油田X区克下组低渗透油藏为例[J]. 中国地质, 2022, 49(2): 485-495.
LI Wei, SHI Qingsan, DONG Haihai, HOU Rui. Optimum selection of injection-production method for carbon dioxide miscible flooding in low permeability reservoirs: Taking the low-permeability reservoirs of the Kexia Formation in the X zone of the Karamay Oilfield as an example[J]. Geology in China, 2022, 49(2): 485-495(in Chinese with English abstract).

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2019-12-25
  • 最后修改日期:2020-01-07
  • 录用日期:
  • 在线发布日期: 2022-05-12
  • 出版日期:
温馨提示:建议您使用Chrome、火狐、IE最新版本 ,当您的浏览器版本过低,可能会影响部分功能正常使用。
关闭