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Open AccessArticle
The Mechanism of Casing Perforation Erosion Under Fracturing-Fluid Flow: An FSI and Strength Criteria Study
by
Hui Zhang
Hui Zhang 1,2 and
Chengwen Wang
Chengwen Wang 1,*
1
School of Petroleum and Engineering, China University of Petroleum (East China), Qingdao 266580, China
2
Sinopec North China Company, Zhengzhou 450000, China
*
Author to whom correspondence should be addressed.
Modelling 2025, 6(4), 121; https://doi.org/10.3390/modelling6040121 (registering DOI)
Submission received: 18 August 2025
/
Revised: 28 September 2025
/
Accepted: 1 October 2025
/
Published: 4 October 2025
Abstract
High-pressure, high-volume fracturing in unconventional reservoirs often induces perforation erosion damage, endangering operational safety. This paper employs fluid–solid coupling theory to analyze the flow characteristics of fracturing fluid inside the casing during fracturing. Combined with strength theory, the stress distribution and variation law are investigated, revealing the mechanical mechanism of casing perforation erosion damage. The results indicate that the structural discontinuity at the entrance of the perforation tunnel causes an increase in fracturing-fluid velocity, and this is where the most severe erosion happens. The stress around the perforation is symmetrically distributed along the perforation axis. The casing inner wall experiences a combined tensile–compressive stress state, while non-perforated regions are under pure tensile stress, with the maximum amplitudes occurring in the 90° and 270° directions. Although the tensile and compressive stress do not exceed the material’s allowable stress, the shear stress exceeds the allowable shear stress, indicating that shear stress failure is likely to initiate at the perforation, inducing erosion. Moreover, under the impact of fracturing fluid, the contact forces at the first and second interfaces of the casing are unevenly distributed, reducing cement bonding capability and compromising casing integrity. The findings provide a theoretical basis for optimizing casing selection.
Share and Cite
MDPI and ACS Style
Zhang, H.; Wang, C.
The Mechanism of Casing Perforation Erosion Under Fracturing-Fluid Flow: An FSI and Strength Criteria Study. Modelling 2025, 6, 121.
https://doi.org/10.3390/modelling6040121
AMA Style
Zhang H, Wang C.
The Mechanism of Casing Perforation Erosion Under Fracturing-Fluid Flow: An FSI and Strength Criteria Study. Modelling. 2025; 6(4):121.
https://doi.org/10.3390/modelling6040121
Chicago/Turabian Style
Zhang, Hui, and Chengwen Wang.
2025. "The Mechanism of Casing Perforation Erosion Under Fracturing-Fluid Flow: An FSI and Strength Criteria Study" Modelling 6, no. 4: 121.
https://doi.org/10.3390/modelling6040121
APA Style
Zhang, H., & Wang, C.
(2025). The Mechanism of Casing Perforation Erosion Under Fracturing-Fluid Flow: An FSI and Strength Criteria Study. Modelling, 6(4), 121.
https://doi.org/10.3390/modelling6040121
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