Experiment on damage of cement sheath induced by perforation in oil and gas wells

被引：0
|
作者：
Yan Y. [1 ,2 ]
Guan Z. [2 ]
Wang Q. [3 ]
Xu Y. [2 ]
Liao H. [2 ]
机构：
[1] Key Laboratory of In-situ Property-Improving Mining of Ministry of Education, Taiyuan University of Technology, Taiyuan
[2] School of Petroleum Engineering in China University of Petroleum(East China), Qingdao
[3] CNPC Engineering Technology Research & Development Company Limited, Beijing
来源：
Zhongguo Shiyou Daxue Xuebao (Ziran Kexue Ban)/Journal of China University of Petroleum (Edition of Natural Science) | 2022年 / 46卷 / 03期
关键词：
cement sheath; crack; damage area; sealing integrity; spiral perforation;
D O I：
10.3969/j.issn.1673-5005.2022.03.009
中图分类号：
学科分类号：
摘要：
In the perforation process of oil and gas wells using explosive bullet, the well casing and cement sheath around the perforation hole can be damaged, with micro-cracks generated in the cement sheath and micro-annular channels formed at the casing-cement interface, which can lead to fluid channeling in the subsequent production process. In this study, large-scale perforation experiments were conducted using explosive bullets with different trajectories to simulate the perforation process, and the damage characteristics of cement sheath and casing-cement interface were investigated under a spiral trajectory perforation condition. The influence of the explosive load and perforation density on the damage of the cement sheath was analyzed with two cement slurry formulations. The experimental results show that the micro-cracks generated around the perforation hole were close to the cement-formation interface. The difference of casing and cement deformation contributes to the formation of a saddle-shaped debonding zone at the casing-cement interface around the perforation hole. Perforation using low explosive charge, low perforation density and optimized cement slurry formula can reduce the damage of the cement sheath and the debonding area of the cementing interface, which is also beneficial for maintaining the wellbore integrity during later stages of hydraulic fracturing and production. © 2022 University of Petroleum, China. All rights reserved.
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页码：81 / 88
页数：7
相关论文
共 20 条
  • [1] LIU He, WANG Feng, WANG Yucai, Et al., Oil well perforation technology: status and prospects, Petroleum Exploration and Development, 41, 6, pp. 731-737, (2014)
  • [2] LI Keming, ZHANG Xi, High energy combined perforation technique and its application, Petroleum Exploration and Development, 29, 5, pp. 91-92, (2002)
  • [3] CHEN Lijing, LI Ning, WANG Junqi, Et al., Initiation and extension of existing cracks under detonation gas loading in a high energy combined perforation, Petroleum Exploration and Development, 32, 6, pp. 91-93, (2005)
  • [4] ZHU Xiuxing, ZHANG Lin, XUE Shifeng, Et al., Evaluation of perforating damage for sandstone, Journal of China University of Petroleum (Edition of Natural Science), 38, 1, pp. 137-142, (2014)
  • [5] WANG Haiyang, LU Yiyu, XIA Binwei, Et al., Propagation mechanism of hydraulic fracture of perforation in laminated slate, Journal of China University of Petroleum (Edition of Natural Science), 42, 2, pp. 95-101, (2018)
  • [6] GAO Deli, LIU Kui, Progresses in shale gas well integrity research [ J ], Oil & Gas Geology, 40, 3, pp. 602-615, (2019)
  • [7] WANG Xianglin, ZHONG Qigang, A research on preventing and resisting the oil permeation in well cementation, Acta Petrolei Sinica, 20, 4, pp. 88-92, (1999)
  • [8] GU Jun, QIN Leibin, TANG Naiqian, Et al., Evolution process of water channeling pathway along cement-aquifuge interface in coalbed methane well, Journal of China University of Mining & Technology, 48, 1, pp. 87-98, (2019)
  • [9] KIM J, MORIDIS G J, MARTINEZ E R., Investigation of possible wellbore cement failures during hydraulic fracturing operations[J], Journal of Petroleum Science and Engineering, 139, pp. 254-263, (2016)
  • [10] ZHAO Xiaofeng, GUAN Zhichuan, ZHANG Han, Et al., Mechanical response of perforated cement sheath through hydraulic fracturing, Fault-Block Oil & Gas Field, 24, 5, pp. 695-699, (2017)
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