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Numerical Analysis of Perforation during Hydraulic Fracture Initiation Based on Continuous–Discontinuous Element Method

Rui Zhang1, Lixiang Wang2,*, Jing Li1,4, Chun Feng2, Yiming Zhang1,3,4,*

1 School of Civil and Transportation Engineering, Hebei University of Technology, Tianjin, 300401, China
2 Key Laboratory for Mechanics in Fluid Solid Coupling Systems, Institute of Mechanics, Chinese Academy of Sciences, Beijing, 100190, China
3 School of Civil Engineering and Architecture, Zhejiang Sci-Tech University, Hangzhou, 310018, China
4 Jinyun Institute, Zhejiang Sci-Tech University, Lishui, 321400, China

* Corresponding Authors: Lixiang Wang. Email: email; Yiming Zhang. Email: email

(This article belongs to the Special Issue: Multiscale, Multifield, and Continuum-Discontinuum Analysis in Geomechanics )

Computer Modeling in Engineering & Sciences 2024, 140(2), 2103-2129. https://doi.org/10.32604/cmes.2024.049885

Abstract

Perforation is a pivotal technique employed to establish main flow channels within the reservoir formation at the outset of hydraulic fracturing operations. Optimizing perforation designs is critical for augmenting the efficacy of hydraulic fracturing and boosting oil or gas production. In this study, we employ a hybrid finite-discrete element method, known as the continuous–discontinuous element method (CDEM), to simulate the initiation of post-perforation hydraulic fractures and to derive enhanced design parameters. The model incorporates the four most prevalent perforation geometries, as delineated in an engineering technical report. Real-world perforations deviate from the ideal cylindrical shape, exhibiting variable cross-sectional profiles that typically manifest as an initial constriction followed by an expansion, a feature consistent across all four perforation types. Our simulations take into account variations in perforation hole geometries, cross-sectional diameters, and perforation lengths. The findings show that perforations generated by the 39g DP3 HMX perforating bullet yield the lowest breakdown pressure, which inversely correlates with increases in sectional diameter and perforation length. Moreover, this study reveals the relationship between breakdown pressure and fracture degree, providing valuable insights for engineers and designers to refine perforation strategies.

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APA Style
Zhang, R., Wang, L., Li, J., Feng, C., Zhang, Y. (2024). Numerical analysis of perforation during hydraulic fracture initiation based on continuous–discontinuous element method. Computer Modeling in Engineering & Sciences, 140(2), 2103-2129. https://doi.org/10.32604/cmes.2024.049885
Vancouver Style
Zhang R, Wang L, Li J, Feng C, Zhang Y. Numerical analysis of perforation during hydraulic fracture initiation based on continuous–discontinuous element method. Comput Model Eng Sci. 2024;140(2):2103-2129 https://doi.org/10.32604/cmes.2024.049885
IEEE Style
R. Zhang, L. Wang, J. Li, C. Feng, and Y. Zhang "Numerical Analysis of Perforation during Hydraulic Fracture Initiation Based on Continuous–Discontinuous Element Method," Comput. Model. Eng. Sci., vol. 140, no. 2, pp. 2103-2129. 2024. https://doi.org/10.32604/cmes.2024.049885



cc This work is licensed under a Creative Commons Attribution 4.0 International License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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