Mechanical integrity of cement sheath barriers in deepwater wells under earthquake-induced fault slip: A three-dimensional finite-element study for offshore geohazard conditions

田传英; Hu Meng; Jiang Wu; Kai Bai; Kaide Zhao; Shuangjin Zheng

doi:10.1016/j.oceaneng.2026.126251

May 27, 2026Ocean EngineeringOpen Access

Mechanical integrity of cement sheath barriers in deepwater wells under earthquake-induced fault slip: A three-dimensional finite-element study for offshore geohazard conditions

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Key Points

This research aims to investigate how earthquake-induced fault slip affects the integrity of cement sheath barriers in deepwater wells.
Developed a 3D finite-element model to simulate fault slip and stress conditions.
Applied Mohr-Coulomb and contact criteria to assess risk to the cement sheath barriers.
Analyzed variables such as cement modulus, Poisson's ratio, and dip angle in relation to earthquake magnitude.
Identified localized tensile and shear damage near the fault slip plane.
Established that cement properties and dip angle significantly influence stress buildup.
Recommended flexible cement systems for enhanced anti-shear performance in deepwater wells.

Implication

Finite-element study links earthquake magnitude to cement sheath damage in deepwater wells, suggesting design improvements.

Abstract

• A 3D contact FE model links earthquake magnitude to formation slip. • Fault slip localizes tensile and shear damage near the slip plane. • Mohr-Coulomb and contact criteria quantify cement-sheath barrier risk. • Cement modulus, Poisson's ratio, dip angle and Mw govern stress buildup. • Flexible cement systems support anti-shear design for deepwater wells.

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Cite This Study

田传英 et al. (2026) studied this question.

synapsesocial.com/papers/6a1a7e2f0307b78509430f9c https://doi.org/10.1016/j.oceaneng.2026.126251

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Mechanical integrity of cement sheath barriers in deepwater wells under earthquake-induced fault slip: A three-dimensional finite-element study for offshore geohazard conditions

Key Points

Implication

Abstract

Discussion

Cite This Study

Mechanical integrity of cement sheath barriers in deepwater wells under earthquake-induced fault slip: A three-dimensional finite-element study for offshore geohazard conditions

Key Points

Implication

Abstract

Discussion

Cite This Study

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