Effects of the mechanical properties of a cement sheath and formation on the sealing integrity of the cement-formation interface in shallow water flow in deep water

Tian, Leiju; Bu, Yuhuan; Liu, Huajie; Lu, Chang; Guo, Shenglai; Xu, Huimin; Ren, Yan-Xia

doi:10.1016/j.conbuildmat.2023.130496

Cited by 6 publications

(2 citation statements)

References 29 publications

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“…However, due to the thin cementformation interface and mud cake, conventional cement slurry systems cannot effectively prevent brittle failure of the cement sheath. Tian et al (2023) studied the effects of elastic modulus, Poisson's ratio, and casing internal pressure on the initial failure pressure of the cement formation interface (CFI) based on ABAQUS. It was found that as the depth of the formation increases, the likelihood of CFI failure decreases, mainly due to the significant influence of the elastic modulus and Poisson's ratio of shallow formations on the initial failure of CFI.…”

Section: Introductionmentioning

confidence: 99%

Study on preparation and properties of polyurethane modified epoxy resin lotion cementing slurry

Mao

2024

Eng. Res. Express

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To solve the problems of poor cementing quality and weak consolidation performance of deep-water shallow cementing cement, a low-temperature curable polyurethane-modified epoxy resin lotion (WER) was prepared with epoxy resin and polyurethane as raw materials, and its hydrophilic groups (carboxyl and ether bonds) were self-emulsified. The results show that the viscosity of WER lotion is maintained between 100-200mPa · s at 25 ℃ -60 ℃, and it has a high slurry stability and an apparent viscosity lower than 300mPa · s when used as a flexible admixture of cement slurry. When 15% WER lotion is added, the filtrate loss of cement slurry is less than 40mL, and the thickening transition time is less than 16min, which can effectively prevent gas channeling. In addition, the low-temperature mechanical properties of WER lotion cement paste have been significantly improved. Its compressive strength has increased by 42.4% and 44.5% in 3d and 7d compared with neat cement paste, while its elastic modulus has decreased by 34.1% and 42.4%, respectively, showing excellent toughening effect, which will be conducive to improving the consolidation effect on shallow weak formations and enhancing the cementing performance between casings and formations.

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Section: Introductionmentioning

confidence: 99%

Study on preparation and properties of polyurethane modified epoxy resin lotion cementing slurry

Mao

2024

Eng. Res. Express

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“…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. The cement sheath's shear failure can produce plastic strain.…”

Section: Introductionmentioning

confidence: 99%

Failure Mechanism of Integrity of Cement Sheath under the Coupling Effect of Formation Creep and Temperature during the Operation of Salt Rock Gas Storage

Yang,

Bu,

Jing

et al. 2023

Energies

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Maintaining the integrity of the cement sheath is essential for the sealing of underground gas storage. The formation creep, temperature changes, and operating pressure changes during the operation of underground gas storage can cause changes in the stress of the cement sheath, which probably induces the failure of the cement sheath’s integrity. A creep model taking the effects of stress and temperature into account is developed to study the cement sheath’s integrity in creep formation, and the feasibility of creep simulation via finite element method is verified. The finite element method is used to analyze the effects of formation creep, temperature, operating pressure, and the cement sheath’s elastic modulus on the cement sheath’s integrity. The result shows that the coupling effect of formation creep and temperature increases the cement sheath’s failure risk; both the formation creep and the decrease in cement sheath temperature increase the Von Mises stress on the cement sheath, increasing the risk of the cement sheath’s shear failure. The decrease in cement sheath temperature decreases the circumferential compressive stress on the cement sheath and raises the risk of the cement sheath’s tensile failure. Shear failure of the cement sheath occurs at high operating pressure upper limits. The operating pressure is less than 70 MPa, or the cement sheath’s elastic modulus is less than 3 GPa, which can prevent the failure of the cement sheath’s integrity during the operation of underground gas storage.

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Application of ABAQUS Flow-Solid coupling model to evaluate sealing capability of sandstone formation interface based on the cracking behavior of cohesive force units

Zhang,

Liu,

Zheng

et al. 2023

Construction and Building Materials

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Effects of the mechanical properties of a cement sheath and formation on the sealing integrity of the cement-formation interface in shallow water flow in deep water

Cited by 6 publications

References 29 publications

Study on preparation and properties of polyurethane modified epoxy resin lotion cementing slurry

Study on preparation and properties of polyurethane modified epoxy resin lotion cementing slurry

Failure Mechanism of Integrity of Cement Sheath under the Coupling Effect of Formation Creep and Temperature during the Operation of Salt Rock Gas Storage

Application of ABAQUS Flow-Solid coupling model to evaluate sealing capability of sandstone formation interface based on the cracking behavior of cohesive force units

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