Special Oil & Gas Reservoirs >

2023 , Vol. 30 >Issue 5: 166 - 174

DOI: https://doi.org/10.3969/j.issn.1006-6535.2023.05.022

Drilling & Production Engineering

External Load Analysis of Hydraulic Fracturing Casing in Zhaotong Shale Gas Horizontal Well of Sichuan Basin

  • Meng Hu ,
  • Shen Yinghao ,
  • Zhu Wanyu ,
  • Li Xiaojun ,
  • Lei Derong ,
  • Ge Hongkui
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  • 1. Unconventional Petroleum Research Institute, China University of Petroleum (Beijing), Beijing 102249, China;
    2. PetroChina Xinjiang Oilfield Company, Karamay, Xinjiang 834000, China

Received date: 2023-02-17

  Revised date: 2023-07-15

  Online published: 2023-12-25

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Abstract

In view of casing damage during hydraulic fracturing in Zhaotong shale gas demonstration area, a numerical model of casing-cement sheath-formation combination was established based on casing deformation characteristics and theoretical analysis to study the mechanism of increasing casing external load by temperature effect, fracture network-induced stress, microfracture, formation slip and cementing quality. The study shows that the hydraulic fracturing leads to non-uniform change of the stress field in the Earths crust in the fracture reconstruction area, and greatly increases the stress field in the Earths crust and the difference between the maximum horizontal and vertical crustal stress in the heel and middle areas of horizontal wells; the induced stresses of fracture network, temperature effect, microfracture, formation slip and cementing quality defects will increase the external load of casing, among which the induced stresses generated by hydraulic fracturing has the most significant effect on increasing the external load of the casing, which may be the main reason for the high probability of damage to the casing in the heel and middle areas of horizontal wells. This may be the main reason for the high probability of casing damage at the heel end and central area of horizontal wells. Due to the high construction pressure and high stress difference, the weak surfaces such as stratigraphy and natural fractures in Zhaotong area are prone to shear slip in the process of hydraulic fracturing, and the casing deformation and force are the largest when the angle of the weak surface and the wellbore is 45°. The study results provide guidance for casing strength design and casing deformation prevention in horizontal wells of shale gas fields.

Key words： shale gas; hydraulic fracturing; casing external load; casing damage; stress field; Zhaotong shale gas demonstration area

Cite this article

Meng Hu , Shen Yinghao , Zhu Wanyu , Li Xiaojun , Lei Derong , Ge Hongkui . External Load Analysis of Hydraulic Fracturing Casing in Zhaotong Shale Gas Horizontal Well of Sichuan Basin[J]. Special Oil & Gas Reservoirs, 2023 , 30(5) : 166 -174 . DOI: 10.3969/j.issn.1006-6535.2023.05.022

References

[1] 郭建春,路千里,何佑伟.页岩气压裂的几个关键问题与探索[J].天然气工业,2022,42(8):148-161.
GUO Jianchun,LU Qianli,HE Youwei.Key issues and explorations in shale gas fracturing[J].Natural Gas Industry,2022,42(8):148-161.
[2] 刘尧文,明月,张旭东,等.涪陵页岩气井“套中固套”机械封隔重复压裂技术[J].石油钻探技术,2022,50(3):86-91.
LIU Yaowen, MING Yue, ZHANG Xudong, et al.“Casing in casing”mechanical isolation refracturing technology in Fuling shale gas wells[J].Petroleum Drilling Techniques,2022,50(3):86-91.
[3] 蒋廷学,王海涛.中国石化页岩油水平井分段压裂技术现状与发展建议[J].石油钻探技术,2021,49(4):14-21.
JIANG Tingxue,WANG Haitao.The current status and development suggestions for Sinopec's staged fracturing technologies of horizontal shale oil wells[J].Petroleum Drilling Techniques,2021,49(4):14-21.
[4] 毛良杰,林颢屿,余星颖,等.页岩气储层断层滑移对水平井套管变形的影响[J].断块油气田,2021,28(6):755-760.
MAO Liangjie,LIN Haoyu,YU Xingying,et al.Influence of fault slip on casing deformation of horizontal well in shale gas reservoir[J].Fault-Block Oil & Gas Field,2021,28(6):755-760.
[5] 童亨茂,张平,张宏祥,等.页岩气水平井开发套管变形的地质力学机理及其防治对策[J].天然气工业,2021,41(1):189-197.
TONG Hengmao,ZHANG Ping,ZHANG Hongxiang,et al.Geomechanical mechanisms and prevention countermeasures of casing deformation in shale gas horizontal wells[J].Natural Gas Industry,2021,41(1):189-197.
[6] 王金刚,孙虎,任斌,等.填砂分段压裂技术在页岩油套变水平井的应用[J].石油钻探技术,2021,49(4):139-142.
WANG Jingang,SUN Hu,REN Bin,et al.Application of staged sand filling fracturing technology in horizontal shale oil wells with deformed casings[J].Petroleum Drilling Techniques,2021,49(4):139-142.
[7] 刘红磊,陈作,周林波,等.套管封隔器分段压裂管柱遇卡原因分析及解决方案[J].石油钻探技术,2021,49(2):102-106.
LIU Honglei,CHEN Zuo,ZHOU Linbo,et al.The analysis and solution of sticking in a staged horizontal well fracturing with a casing packer[J].Petroleum Drilling Techniques,2021,49(2):102-106.
[8] XI Yan,LI Jun,LIU Gonghui,et al.Numerical investigation for different casing deformation reasons in Weiyuan-Changning shale gas field during multistage hydraulic fracturing[J].Journal of Petroleum Science and Engineering,2018,163:691-702.
[9] 黄卓.“工厂化”压裂多裂缝应力干扰与延伸规律研究[J].断块油气田,2022,29(4):572-576.
HUANG Zhuo.Research on stress interference and propagation law of multi-fracture for “factory” fracturing[J].Fault-Block Oil & Gas Field,2022,29(4):572-576.
[10] 丁士东,刘奎,刘小刚,等.环空加压固井对双层套管水泥环界面径向应力的影响[J].石油钻探技术,2022,50(1):30-37.
DING Shidong,LIU Kui,LIU Xiaogang,et al.The effect of pre-applied annulus back pressure cementing on radial stress of interfaces in double layer casing systems[J].Petroleum Drilling Techniques,2022,50(1):30-37.
[11] 郭建设,周福建,胡晓玲,等.三塘湖盆地致密油水平井增能压裂力学机理[J].断块油气田,2021,28(1):57-62.
GUO Jianshe,ZHOU Fujian,HU Xiaoling,et al.Mechanical mechanism of horizontal well energized fracturing of tight oil in Santanghu Basin[J].Fault-Block Oil & Gas Field,2021,28(1):57-62.
[12] 陈朝伟,项德贵.四川盆地页岩气开发套管变形一体化防控技术[J].中国石油勘探,2022,27(1):135-141.
CHEN Chaowei,XIANG Degui.Integrated prevention and control technology of casing deformation in shale gas development well in Sichuan Basin[J].China Petroleum Exploration,2022,27(1):135-141.
[13] 林魂,宋西翔,孙新毅,等.深层页岩气压裂井套管应力影响因素分析[J].石油机械,2022,50(6):84-90.
LIN Hun,SONG Xixiang,SUN Xinyi,et al.Analysis of factors influencing casing stress in deep shale gas fractured wells[J].China Petroleum Machinery,2022,50(6):84-90.
[14] 黄熠,陈浩东,郑浩鹏,等.套管偏心对压裂井水泥环力学完整性的影响研究[J].中国海上油气,2022,34(6):135-141.
HUANG Yi,CHEN Haodong,ZHENG Haopeng,et al.Influence of casing eccentricity on mechanical integrity of cement sheath in fractured wells[J].China Offshore Oil and Gas,2022,34(6):135-141.
[15] 席岩,李军,柳贡慧,等.页岩气水平井压裂过程中水泥环完整性分析[J].石油科学通报,2019,4(1):57-68.
XI Yan,LI Jun,LIU Gonghui,et al.Research into cement sheath integrity during multistage hydraulic fractur-ing in shale gas wells[J].Petroleum Science Bulletin,2019,4(1):57-68.
[16] 沈新普,张平.预防套管变形的许用压裂注入压力计算方法[J].天然气工业,2019,39(1):87-96.
SHEN Xinpu,ZHANG Ping.A calculation method for the allowable fracturing injection pressure of preventing casing deformation[J].Natural Gas Industry,2019,39(1):87-96.
[17] LIAN Zhanghua,YU Hao,LIN Tiejun,et al.A study on casing deformation failure during multi-stage hydraulic fracturing for the stimulated reservoir volume of horizontal shale wells[J].Journal of Natural Gas Science and Engineering,2015,23(1):540-546.
[18] 林志伟,钟守明,宋琳,等.体积压裂改造非对称性对套管损坏影响机理[J].特种油气藏,2021,28(6):158-164.
LIN Zhiwei,ZHONG Shouming,SONG Lin,et al.Study on the mechanism of the asymmetry effect of SRV fracturing on casing damage[J].Special Oil & Gas Reservoirs,2021,28(6):158-164.
[19] 陈朝伟,王鹏飞,项德贵.基于震源机制关系的长宁-威远区块套管变形分析[J].石油钻探技术,2017,45(4):110-114.
CHEN Chaowei,WANG Pengfei,XIANG Degui.Analysis of casing deformation in the Changning-Weiyuan Block based on focal mechanism[J].Petroleum Drilling Techniques,2017,45(4):110-114.
[20] 路千里,刘壮,郭建春,等.水力压裂致套管剪切变形机理及套变量计算模型[J].石油勘探与开发,2021,48(2):394-401.
LU Qianli,LIU Zhuang,GUO Jianchun,et al.Hydraulic fracturing induced casing shear deformation and a prediction model of casing deformation[J].Petroleum Exploration and Development,2021,48(2):394-401.
[21] LI Hongtao,LI Ze,LI Gao,et al.Casing deformation mechanisms of horizontal wells in Weirong shale gas field during multistage hydraulic fracturing[J].Journal of Natural Gas Science and Engineering,2020,84(1):103893.
[22] LI Ze,LI Hongtao,LI Gao,et al.The influence of shale swelling on casing deformation during hydraulic fracturing[J].Journal of Petroleum Science and Engineering,2021,205(9):108844.
[23] ZHANG Xin,LI Jun,ZHANG Hui,et al.Analysis of casing deformation failure mechanism based on fault slip[J].Engineering Failure Analysis,2021,127:105430.
[24] ZHAO ChaoJie,LI Jun,ZAMAN Musharraf,et al.Investigation of casing deformation characteristics under cycling loads and the effect on casing strength based on full-scale equipment[J].Journal of Petroleum Science and Engineering,2021,205(2):108973.
[25] 张东涛,胡朝俊,闫亚蕾,等.昭通地区现今构造应力场分布特征及成因机制[J].天然气工业,2021,41(增刊):24-29.
ZHANG Dongtao,HU Chaojun,YAN Yalei,et al.Distribution characteristics and genetic mechanism of present tectonic stress field in Zhaotong area[J].Natural Gas Industry,2021,41(S):24-29.
[26] WENG Xiaowei,KRESSE O,COHEN C,et al.Modeling of hydraulic-fracture-network propagation in a naturally fractured formation[J].SPE Production & Operations,2011,26(4):368-380.
[27] WENG Xiaowei.Modeling of complex hydraulic fractures in naturally fractured formation[J].Journal of Unconventional Oil & Gas Resources,2015,9,114-135.
[28] ZHANG Fengshou,JIANG Zhenyuan,CHEN Zhaowei,et al.Hydraulic fracturing induced fault slip and casing shear in Sichuan Basin:a multi-scale numerical investigation[J].Journal of Petroleum Science and Engineering,2020,195:107797.
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