2022
DOI: 10.3389/fmats.2022.980920
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Stress concentration of perforated cement sheath and the effect of cement sheath elastic parameters on its integrity failure during shale gas fracturing

Abstract: Due to the extremely low porosity and permeability of shale, fracturing is often used to develop shale gas reservoirs. During shale fracturing, extremely high fracturing pressure may invalidate the integrity of the cement sheath and bring hidden dangers to the safe development of shale gas. This paper compares the stress state of the three-dimensional unperforated and perforated finite element models of casing-cement sheath-formation to obtain the influence of perforation on the stress concentration and failur… Show more

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Cited by 2 publications
(1 citation statement)
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“…This could potentially result in the escape of gas from the UGS, carrying negative consequences for safety, the environment, and the economy [4]. The failure types of CSI include shear failure (i.e., compressive failure), debonding failure, and tensile failure (i.e., radial crack) [5][6][7]. The Von Mises criterion [8][9][10][11][12][13], Tresca criterion [14,15], Mohr-Coulomb criterion [5,16,17], and Energies 2023, 16, 7089 2 of 17 Drucker-Prager criterion [18,19] are often used to judge the cement sheath's shear failure.…”
Section: Introductionmentioning
confidence: 99%
“…This could potentially result in the escape of gas from the UGS, carrying negative consequences for safety, the environment, and the economy [4]. The failure types of CSI include shear failure (i.e., compressive failure), debonding failure, and tensile failure (i.e., radial crack) [5][6][7]. The Von Mises criterion [8][9][10][11][12][13], Tresca criterion [14,15], Mohr-Coulomb criterion [5,16,17], and Energies 2023, 16, 7089 2 of 17 Drucker-Prager criterion [18,19] are often used to judge the cement sheath's shear failure.…”
Section: Introductionmentioning
confidence: 99%