Fracturing Failure Mechanism of Porous Cement Sheath under Triaxial Stress

YANG Yongming; SUN Mengke

doi:10.11858/gywlxb.20220544

Volume 36 Issue 6

Dec 2022

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Chinese Journal of High Pressure Physics > 2022 > 36(6): 064103.

YANG Yongming, SUN Mengke. Fracturing Failure Mechanism of Porous Cement Sheath under Triaxial Stress[J]. Chinese Journal of High Pressure Physics, 2022, 36(6): 064103. doi: 10.11858/gywlxb.20220544

Citation:

YANG Yongming, SUN Mengke. Fracturing Failure Mechanism of Porous Cement Sheath under Triaxial Stress[J]. Chinese Journal of High Pressure Physics, 2022, 36(6): 064103. doi: 10.11858/gywlxb.20220544

YANG Yongming, SUN Mengke. Fracturing Failure Mechanism of Porous Cement Sheath under Triaxial Stress[J]. Chinese Journal of High Pressure Physics, 2022, 36(6): 064103. doi: 10.11858/gywlxb.20220544

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Fracturing Failure Mechanism of Porous Cement Sheath under Triaxial Stress

doi: 10.11858/gywlxb.20220544

School of Mechanics and Civil Engineering, China University of Mining and Technology, Beijing 100083, China

Received Date: 22 Mar 2022
Rev Recd Date: 06 Apr 2022
Accepted Date: 08 Apr 2022
Issue Publish Date: 05 Dec 2022

Abstract

Abstract

The liquid silicon cement sheath samples were prepared, and the mechanical property testing experiments were carried out. Aiming at the problem of downhole failure of porous cement sheath, the porous “single-layer cement sheath” and “cement sheath-casing-cement sheath” models were established by using Flac 3D self-programming program to simulate the cement sheath fracturing process under the action of deep in-situ stress, and the deformation and failure laws of cement sheath under the coupling action of hydraulic pressure and in-situ stress were proved. The research shows that the single-layer cement sheath exhibits brittle failure under the action of stress, while under the protection of the outer casing and the cement sheath, the peak load of the cement sheath can be effectively increased. The research results provide a theoretical basis for revealing the failure mechanism of cement ring seal failure.
- liquid silicon cement sheath,
- porous structure,
- stress distribution,
- deformation failure

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References(26)

References

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Fracturing Failure Mechanism of Porous Cement Sheath under Triaxial Stress

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