Characteristics and Control Methods of Wellbore Integrity Failure for Jimsar Shale Oil

Xinjiang Oil & Gas ›› 2021, Vol. 17 ›› Issue (3): 37-43.

• OIL AND GAS DEVELOPMENT • Previous Articles Next Articles

Characteristics and Control Methods of Wellbore Integrity Failure for Jimsar Shale Oil

LI Jun^1,2, WU Jiwei³, XIE Shiyuan³, CHEN Liang⁴, LIAN Wei²

1. Karamay Campus,China University of Petroleum （Beijing）,Karamay 834000;Xinjiang,China;
2. School of Petroleum Engineering,China University of Petroleum （Beijing）,Changping 102249,Beijing,China;
3. Research Institute of Engineering Technology,PetroChina Xinjiang Oilfield Company,Karamay 834000,Xinjiang,China;
4. Karamay Sanda Co.,Ltd.,Karamay 834000,Xinjiang,China

Online:2021-09-10 Published:2021-09-10

吉木萨尔页岩油井筒完整性失效特点与控制方法

李军^1,2, 吴继伟³, 谢士远³, 陈亮⁴, 连威²

1.中国石油大学（北京）克拉玛依校区,新疆克拉玛依 834000;
2.中国石油大学（北京）石油工程学院,北京昌平 102249;
3.新疆油田公司工程技术研究院,新疆克拉玛依 834000;
4.新疆克拉玛依市三达有限责任公司,新疆克拉玛依 834000

作者简介:李军（1971-）,2005年毕业于中国石油大学（北京）油气井工程专业,教授,主要从事井筒完整性、控压钻井、井下测量、钻井提速等方面科研工作。（Tel）010-89731225（E-mail）lijun446@vip.163.com
基金资助:
国家自然科学基金企业创新发展联合基金项目“海相深层高温高压钻完井工程基础理论及控制方法”（编号：U19B6003-05）; 国家自然科学基金联合基金重点项目“页岩气水平井井筒完整性失效机理与控制方法”（编号：U1762211）

Abstract

Abstract: The casing deformation problem in the process of multistage fracturing in Jimsar shale oil is prominent. Based on an analysis of its development status,casing deformation in shale oil wells in the demonstration area was counted to give a clear picture on the forms of casing deformation,as well as the characteristics of its temporal and spatial distribution. The influencing factors of casing deformation were analyzed from the perspective of engineering and geology. The analysis results show that the casing deformation in shale oil wells is characterized by shear deformation. Casing deformation points are located near target A,middle section and target B accounts for 50.0%,32.2% and 17.8%. Casing deformation mostly occurs in the process of fracturing. Formation lithologic interfaces,natural fractures and fault development degree are the main influencing factors,while cementing quality,casing wall thickness and rigidity have little influence. Reducing pump rate and pump pressure is conducive to mitigating casing deformation. Finally,the control methods of wellbore integrity are put forward which can provide reference in controlling the wellbore integrity failure for shale oil.

Key words: shale oil, casing deformation, hydraulic fracturing, wellbore integrity, control method, Jimsar

摘要： 吉木萨尔页岩油开发过程中套管变形问题突出。通过统计示范区内页岩油井的套管变形情况,明确了套管变形形式和时间空间分布特点,并从工程和地质两个方面分析了套管变形的影响因素。分析表明,吉木萨尔页岩油井套管变形特征为剪切变形,变形点位于A靶点、中间段和B靶点附近,分别占50.0%、32.2%和17.8%;套管变形主要出现在压裂过程中。地层岩性界面、天然裂缝、断层发育程度是套管变形的主要影响因素,固井质量、套管壁厚与钢级对套管变形影响较小,降低压裂排量、泵压有利于缓解套管变形。在此基础上提出了井筒完整性控制方法,可为页岩油井筒完整性失效问题的控制提供参考。

关键词: 页岩油, 套管变形, 水力压裂, 井筒完整性, 控制方法, 吉木萨尔

CLC Number:

TE358

LI Jun, WU Jiwei, XIE Shiyuan, CHEN Liang, LIAN Wei. Characteristics and Control Methods of Wellbore Integrity Failure for Jimsar Shale Oil[J]. Xinjiang Oil & Gas, 2021, 17(3): 37-43.

李军, 吴继伟, 谢士远, 陈亮, 连威. 吉木萨尔页岩油井筒完整性失效特点与控制方法[J]. 新疆石油天然气, 2021, 17(3): 37-43.

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Characteristics and Control Methods of Wellbore Integrity Failure for Jimsar Shale Oil

吉木萨尔页岩油井筒完整性失效特点与控制方法

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