油气藏评价与开发 ›› 2021, Vol. 11 ›› Issue (4): 536-541.doi: 10.13809/j.cnki.cn32-1825/te.2021.04.009

• 页岩油气勘探开发 • 上一篇    下一篇

吉木萨尔页岩油“下甜点”低成本技术

夏赟1(),张丽萍1,褚浩元1,李佳琦1,马少云2   

  1. 1.中国石油新疆油田分公司工程技术研究院,新疆 克拉玛依 834000
    2.中国石油大学(北京)石油工程学院,北京 102249
  • 收稿日期:2021-05-07 出版日期:2021-08-26 发布日期:2021-08-19
  • 作者简介:夏赟(1994—),女,硕士,助理工程师,从事储层改造工作。地址:新疆克拉玛依市克拉玛依区胜利路87号,邮政编码:834000。E-mail: xiayun1@petrochina.com.cn
  • 基金资助:
    中国石油科学研究与技术开发项目“页岩油高效压裂改造技术与应用”(2019E-2606)

Low-cost technology of Jimsar shale oil: A case study of lower “sweet spot”

XIA Yun1(),ZHANG Liping1,CHU Haoyuan1,LI Jiaqi1,MA Shaoyun2   

  1. 1. Engineering Technology Research Institute, CNPC Xinjiang Oilfield Company, Karamay, Xinjiang 834000, China
    2. College of Petroleum Engineering, China University of Petroleum(Beijing), Beijing 102249, China
  • Received:2021-05-07 Online:2021-08-26 Published:2021-08-19

摘要:

吉木萨尔二叠系芦草沟组陆相页岩油藏储量丰富,纵向上存在上、下2个“甜点”富集段,随着开发进程的推进,“下甜点”逐渐成为开发主力层位。“下甜点”具有埋深大、非均质性强等特征,开发难度较大。伴随市场环境压力的影响,急需对工艺技术优化实现页岩油低成本开发。基于吉木萨尔页岩油“下甜点”地质特征,应用数值模拟、室内实验、裂缝监测等方法,对簇间距、滑溜水携砂性能、支撑剂导流能力等方面进行了研究,并开展了密切割、暂堵压裂,石英砂替代,全滑溜水加砂等一系列低成本工艺现场试验。现场应用效果显示:综合采用低成本压裂改造技术,在产量相当的基础上综合压裂成本可降低30 %以上,为吉木萨尔页岩油“下甜点”后续高效开发提供借鉴。

关键词: 页岩油, 密切割, 暂堵压裂, 石英砂替代, 滑溜水加砂, 低成本开发

Abstract:

The Permian Lucaogou Formation in Jimsar is rich in continental shale oil reserves. There are two “sweet spot” developed in the vertical direction. As the development progresses advances, the lower “sweet spot” becomes the main development layer. It has the characteristics of large depth and strong heterogeneity, which makes the development difficult. With the impact of market environmental pressure, it is urgent to optimize the stimulation technology to realize the low-cost development of shale oil. Based on the geological characteristics, the methods of numerical simulation, experiments, and fracture monitoring are used to study the cluster spacing, sand-carrying performance of slick water, conductivity of proppant and so on. Then, a series of low-cost tests such as intensive stage, temporary plugging fracturing, quartz sand replacement, and slick water sand injection have been carried out. The application effect showed that the comprehensively use of low-cost stimulation technology can reduce the cost by at least 30 %, meanwhile, maintain the output. It provides a reference for the subsequent development for Jimsar shale oil.

Key words: shale oil, intensive stage, temporary plugging, quartz sand replacement, slick water sand injection, low-cost development

中图分类号: 

  • TE355