新疆石油地质

新疆石油地质 ›› 2025, Vol. 46 ›› Issue (6): 754-761.doi: 10.7657/XJPG20250611

• 油藏工程 • 上一篇    下一篇

走滑断裂滑移诱发套管变形数值模拟及压裂方案优化——以吉木萨尔凹陷页岩油为例

吝佳莹1a(), 齐洪岩1a,2, 常婷1a, 张韵洁1a, 张浩1a, 陈刚1a, 梁成钢1b, 魏晓琛3   

  1. 1.中国石油 新疆油田分公司 a.勘探开发研究院，新疆 克拉玛依 834000；b.吉庆油田作业区，新疆 吉木萨尔 831700
    2.中国石油大学（北京） 地球科学学院，北京 102249
    3.西南石油大学 地球科学与技术学院，成都 610500
  • 收稿日期:2025-04-25 修回日期:2025-08-12 出版日期:2025-12-01 发布日期:2025-12-05
  • 作者简介:吝佳莹（1998-），女，辽宁沈阳人，助理工程师，硕士，油藏工程，（Tel）15209909117（Email）86494543@petrochina.com.cn
  • 基金资助:
    中国石油科技项目(2023ZZ15YJ02)

Numerical Simulation of Strike-Slip Fault Induced Casing Deformation and Optimization of Fracturing Scheme: A Case Study of Shale Oil in Jimsar Sag

LIN Jiaying1a(), QI Hongyan1a,2, CHANG Ting1a, ZHANG Yunjie1a, ZHANG Hao1a, CHEN Gang1a, LIANG Chenggang1b, WEI Xiaochen3   

  1. 1. PetroChina Xinjiang Oilfield Company, a.Research Institute of Exploration and Development, Karamay, Xinjiang 834000, China; b.Jiqing Oilfield Operation District, Jimsar, Xinjiang 831700, China
    2. School of Geosciences, China University of Petroleum ( Beijing ), Beijing 102249, China
    3. School of Geosciences and Technology, Southwest Petroleum University, Chengdu, Sichuan 610500, China
  • Received:2025-04-25 Revised:2025-08-12 Online:2025-12-01 Published:2025-12-05

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摘要： 新疆吉木萨尔国家级陆相页岩油示范区水平井集中部署并大规模压裂，导致断裂激活，引起套管变形，严重影响开发进度。考虑到传统套管变形数值模拟对走滑断裂带多类型断裂的模拟精度低，建立断裂滑移诱发套管变形模型，并与工程实践相结合，揭示了走滑断裂滑移诱发套管变形的主控因素。结果表明：套管变形的主控因素是断裂倾角、附加流体压力和断裂走向与最大水平主应力方向夹角；1级风险套管变形风险段用液量需降低至原设计的65%~70%，暂堵时机提前至用液量为300 m³，可有效控制套管变形风险。研究成果突破了传统压裂设计对走滑断裂带均质化处理的局限，为复杂断裂系统页岩油套管变形预防及高效开发提供了理论依据。

关键词: 吉木萨尔凹陷, 页岩油, 走滑断裂, 套管变形, 数值模拟, 压裂方案

Abstract:

The Jimsar Shale Oil Demonstration Area in Xinjiang, China’s first national-level lacustrine shale oil demonstration area, is in the middle to late stage of development. The concentrated placement of horizontal wells and large-scale fracturing have led to fracture activation, causing casing deformation and impeding the development progress. Considering that the conventional numerical simulation of casing deformation yields results with low accuracy of multiple types of faults in strike-slip fault zones, a strike-slip fault induced casing deformation model was established and then combined with engineering practices to reveal the factors controlling the casing deformation induced by strike-slip fault. The results show that the casing deformation is mainly controlled by fracture dip, applied fluid pressure, and angle between the fracture orientation and the maximum horizontal principal stress direction. For the section of casing deformation at the risk level 1, the injected liquid volume should be reduced to 65%-70% of the original level as designed, and the temporary plugging should be advanced to the time when the injected liquid volume reaches 300 m3, so that the risk of casing deformation can be effectively mitigated. The research breaks through the limitations of traditional fracturing design in the homogenization treatment of strike-slip fault zone, and provides a theoretical basis for the prevention of casing deformation and efficient development of shale oil in complex fault systems.

Key words: Jimsar sag, shale oil, strike-slip fault, casing deformation, numerical simulation, fracturing scheme

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