特种油气藏 ›› 2022, Vol. 29 ›› Issue (3): 131-137.DOI: 10.3969/j.issn.1006-6535.2022.03.019

• 油藏工程 • 上一篇    下一篇

吉木萨尔页岩油CO2吞吐方案优化及试验效果评价

唐维宇1, 黄子怡2, 陈超2, 丁振华2, 盛家平1,3, 王秀坤1, 乐平1   

  1. 1.中国石油大学(北京)非常规油气科学技术研究院,北京 102249;
    2.中国石油新疆油田分公司,新疆 克拉玛依 834000;
    3.Texas Tech University,Texas Lubbock 43111
  • 收稿日期:2021-05-07 修回日期:2022-03-23 出版日期:2022-06-25 发布日期:2023-01-09
  • 通讯作者: 盛家平(1962—),男,博士生导师,SPE杰出会员,国家特聘教授,美国德克萨斯州理工大学终身教授,出版著作两部,1983年毕业于华东石油学院采油专业,1996年毕业于加拿大阿尔伯特大学石油工程专业,获博士学位,研究方向为页岩/致密油高效开发及提高采收率技术。
  • 作者简介:唐维宇(1996—),男,2018年毕业于东北石油大学石油工程专业,现为中国石油大学(北京)石油与天然气工程资源与环境专业在读博士研究生,主要研究方向为致密油藏提高采收率技术。
  • 基金资助:
    国家自然科学基金“页岩油藏空气氧化热破裂机制研究”(51974334);中国石油天然气集团有限公司、中国石油大学(北京)战略合作科技专项“准噶尔盆地玛湖中下组和吉木萨尔陆相页岩油高效勘探开发理论及关键技术研究”(ZLZX2020-XX)

Optimization of CO2 Huff and Puff Scheme for Jimsar Shale Oil and Evaluation of Test Effect

Tang Weiyu1, Huang Ziyi2, Chen Chao2, Ding Zhenhua2, Sheng Jiaping1,3, Wang Xiukun1, Le Ping1   

  1. 1. Unconventional Oil and Gas Science and Technology Institute, China University of Petroleum (Beijing), Beijing 102249, China;
    2. PetroChina Xinjiang Oilfield Company, Karamay, Xinjiang 834000, China;
    3. Texas Tech University, Lubbock, Texas 43111, the United States
  • Received:2021-05-07 Revised:2022-03-23 Online:2022-06-25 Published:2023-01-09

摘要: 针对吉木萨尔页岩储层衰竭式开发采收率低,传统提高采收率措施难以有效增产的问题,提出了CO2吞吐提高采收率的方法。运用数值模拟方法,建立了工区储层油藏数值模拟模型,依据水平段长度及油层厚度优选了适用于CO2吞吐的试验井,明确了基质增能对于CO2吞吐的决定性作用,并对CO2吞吐的工作制度进行了优化。最终将优化方案应用于现场试验,结果表明:试验井间存在裂缝窜扰,导致CO2吞吐注入阶段气窜严重,CO2未充分进入基质置换原油,整体开发效果较差。研究内容对页岩油藏注CO2吞吐提高采收率具有参考意义,可为调整CO2吞吐开发方案提供借鉴。

关键词: 页岩油, CO2吞吐, 提高采收率, 油藏数值模拟, CO2埋存, 新疆油田

Abstract: A method of enhanced recovery efficiency by CO2 huff and puff was proposed in response to the low recovery efficiency in natural depletion of shale gas reservoirs in Jimsar and the difficulty of traditional recovery enhancement measures to effectively increase the production. A numerical simulation model of reservoir in the work area was established by the numerical simulation method. Test wells suitable for CO2 huff and puff were selected according to the horizontal interval length and reservoir thickness. The decisive role of matrix energy enhancement in CO2 huff and puff was clarified, and the working system of CO2 huff and puff was optimized. Finally, the optimized scheme was applied to the field test. The results showed that, there was fracture channeling between the test wells, resulting in serious gas channeling in the injection stage of CO2 huff and puff, and CO2 did not enter the matrix sufficiently to replace the crude oil, resulting in poor overall development efficiency. The study provides a reference for enhancing oil recovery by CO2 huff and puff in shale reservoir and for adjusting the scheme of development by CO2 huff and puff.

Key words: shale oil, CO2 huff and puff, enhanced oil recovery, reservoir numerical modeling, CO2 storage, Xinjiang Oilfield

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