As the core component of the fracturing tool, the packer cartridge plays a vital role in a horizontal well stimulation and transformation process (Sun and Bai in Pet Explor Dev 44:1022–1029, 2017). Influenced by many factors such as formation workflow, borehole structure and construction conditions, the mechanical response of the packer rubber cylinder in sealing is complex and changeable (Jun et al. in J Pet Sci Eng 171:495–506, 2018; Tong et al. J Pet Sci Eng 172:964–975, 2019; Zhu et al. J Pet Sci Eng 151:311–317, 2017b). In order to study the mechanical response mechanism of the packer tool under complex working conditions, tensile tests of rubber under the corrosion environment of carbon dioxide formation fluid were carried out and the constitutive material parameters of Yeoh model after corrosion were obtained. The results showed that the tensile strength of hydrogenated nitrile butadiene rubber (HNBR) decreased by 7.86–17.01% after corrosion in simulated formation fluid, and the elongation at break increased by 2.09–19.74%. Compared with AFLAS (tetrapropyl fluoro elastomer), HNBR rubber had better stability and can be used as the preferred material for the service environment of permanent packers. Based on the mechanical properties of numerical calculation results before and after corrosion, it was found that the contact pressure and compression distance of the whole HNBR packer changed slightly, which met the requirements of field construction. On the basis of optimum selection of rubber material, the sealing performance of packer in borehole casing with enlargement/reduction caused by formation is analyzed. The results show that the casing with expansion deformation will lead to setting lag or lax, and the shrinkage casing will lead to setting advance or even stress failure. The analysis results provide theoretical support for the improvement in permanent packer string and its adaptation to complex formation.
This is a preview of subscription content, log in to check access.
This work was supported by the National Natural Science Foundation of China (No.51874098) and Northeast Petroleum University’s Foundation (No.15041260116 and No.15011030105).
Conflict of interest
The authors have no conflict of interest to report.
S.A. Al-Hiddabi, T. Pervez, S.Z. Qamar, F.K. Al-Jahwari, F. Marketz, S. Al-Houqani, M. van de Velden, Analytical model of elastomer seal performance in oil wells. Appl. Math. Model. 39, 2836–2848 (2015)CrossRefGoogle Scholar
Y.-F. Chen, M.-M. Liu, S.-H. Hu, C.-B. Zhou, Non-Darcy’s law-based analytical models for data interpretation of high-pressure packer tests in fractured rocks. Eng. Geol. 199, 91–106 (2015)CrossRefGoogle Scholar
G. Hu, P. Zhang, G. Wang, M. Zhang, M. Li, The influence of rubber material on sealing performance of packing element in compression packer. J. Nat. Gas Sci. Eng. 38, 120–138 (2017)CrossRefGoogle Scholar
S.H.P. Cavalaro, A. Aguado, Packer behavior under simple and coupled stresses. Tunn. Undergr. Space Technol. 28, 159–173 (2012)CrossRefGoogle Scholar
D. Zhu, Y. Lin, H. Ma, H. Zhang, Y. Li, L. Zhang, K. Deng, Experimental studies on CO2 corrosion of rubber materials for packer under compressive stress in gas wells. Eng. Fail. Anal. 80, 11–23 (2017)CrossRefGoogle Scholar
Y. Xi, J. Li, G. Liu, C. Cha, Y. Fu, Numerical investigation for different casing deformation reasons in Weiyuan-Changning shale gas field during multistage hydraulic fracturing. J. Pet. Sci. Eng. 163, 691–702 (2018)CrossRefGoogle Scholar
H. Yu, A.D. Taleghani, Z. Lian, Modelling casing wear at doglegs by incorporating alternate accumulative wear. J. Pet. Sci. Eng. 168, 273–282 (2018)CrossRefGoogle Scholar
X. Zhu, B. Liu, The reliability-based evaluation of casing collapsing strength and its application in marine gas reservoirs. Eng. Fail. Anal. 85, 1–13 (2018)CrossRefGoogle Scholar
O. Hesebeck, A. Wulf, Hyperelastic constitutive modeling with exponential decay and application to a viscoelastic adhesive. Int. J. Solids Struct. 141–142, 60–72 (2018)CrossRefGoogle Scholar
A. Karimi, M. Navidbakhsh, B. Beigzadeh, A visco-hyperelastic constitutive approach for modeling polyvinyl alcohol sponge. Tissue Cell 46, 97–102 (2014)CrossRefGoogle Scholar
X. He, X. Shi, M. Hoch, C. Gögelein, Mechanical properties of carbon black filled hydrogenated acrylonitrile butadiene rubber for packer compounds. Polym. Test. 53, 257–266 (2016)CrossRefGoogle Scholar
W. Yan, L. Zou, H. Li, J. Deng, H. Ge, H. Wang, Investigation of casing deformation during hydraulic fracturing in high geo-stress shale gas play. J. Pet. Sci. Eng. 150, 22–29 (2017)CrossRefGoogle Scholar
D.W.H. Su, Effects of longwall-induced stress and deformation on the stability and mechanical integrity of shale gas wells drilled through a longwall abutment pillar. Int. J. Min. Sci. Technol. 27, 115–120 (2017)CrossRefGoogle Scholar
F. Yin, Y. Deng, Y. He, D. Gao, B. Hou, Mechanical behavior of casing crossing slip formation in waterflooding oilfields. J. Pet. Sci. Eng. 167, 796–802 (2018)CrossRefGoogle Scholar
F. Yin, L. Han, S. Yang, Y. Deng, Y. He, X. Wu, Casing deformation from fracture slip in hydraulic fracturing. J. Pet. Sci. Eng. 166, 235–241 (2018)CrossRefGoogle Scholar
X. Li, C.S. El Mohtar, K.E. Gray, 3D poro-elasto-plastic modeling of breakouts in deviated wells. J. Pet. Sci. Eng. 174, 913–920 (2019)CrossRefGoogle Scholar
J. Wang, D. Kuanhai, Y. Zhiping, L. Bing, Y. Lin, Y. Feng, Study of technical specifications for non-API 140 casing in ultra-deep well. Eng. Fail. Anal. 97, 115–127 (2019)CrossRefGoogle Scholar
X. Zhu, B. Liu, A method to assess the reliability of casings in marine gas reservoirs based on Bayesian theory optimization. J. Pet. Sci. Eng. 172, 1248–1256 (2019)CrossRefGoogle Scholar
L. Jun, Z. Hongliang, L. Xian, L. Qingyou, X. Guohua, S. Xianming, Experimental study on the mechanical responses of downhole tools in highly-deviated waterflooding well. J. Pet. Sci. Eng. 171, 495–506 (2018)CrossRefGoogle Scholar
X. Sun, B. Bai, Comprehensive review of water shutoff methods for horizontal wells. Pet. Explor. Dev. 44, 1022–1029 (2017)CrossRefGoogle Scholar
Z. Tong, Q. Ye, J. Qian, Z. Hao, L. Wang, Down-hole isolation towards high-temperature reservoir using packing elements with swellable thermo-plastic vulcanizates. J. Pet. Sci. Eng. 172, 964–975 (2019)CrossRefGoogle Scholar
D. Zhu, Y. Lin, H. Zhang, Y. Li, D. Zeng, W. Liu, C. Qiang, K. Deng, Corrosion evaluation of packer rubber materials in CO2 injection wells under supercritical conditions. J. Pet. Sci. Eng. 151, 311–317 (2017)CrossRefGoogle Scholar