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A platform for research: civil engineering, architecture and urbanism
Thermo-poroelastic modelling of cement sheath: pore pressure response, thermal effect and thermo-osmotic effect
Cement sheath provides zonal isolation and structural support during oil/gas well exploitation. Mechanical behaviours of cement sheath are of increasing concern with the exploitation of shale gas. In order to overcome the drawbacks of continuum assumption of cement sheath, a comprehensive thermo-poroelastic model, accounting for the pore water pressure resulted from hydraulic pressure in casing, the thermal loading induced by the temperature difference between the injected water in casing and underground formation, and thermo-osmotic effect, is developed to determine the evolution of effective stress of cement sheath. Moreover, failure criteria for the cement sheath, whose parameters are temperature dependent, are proposed to assess failure modes of cement sheath. A case study is also carried out to assess the tendencies of the failure modes of cement sheath during loading. Application of the proposed model on a triaxial test of undrained heating of oil well cement paste shows the capability of the model with to well reproduce the experimental results.
Thermo-poroelastic modelling of cement sheath: pore pressure response, thermal effect and thermo-osmotic effect
Cement sheath provides zonal isolation and structural support during oil/gas well exploitation. Mechanical behaviours of cement sheath are of increasing concern with the exploitation of shale gas. In order to overcome the drawbacks of continuum assumption of cement sheath, a comprehensive thermo-poroelastic model, accounting for the pore water pressure resulted from hydraulic pressure in casing, the thermal loading induced by the temperature difference between the injected water in casing and underground formation, and thermo-osmotic effect, is developed to determine the evolution of effective stress of cement sheath. Moreover, failure criteria for the cement sheath, whose parameters are temperature dependent, are proposed to assess failure modes of cement sheath. A case study is also carried out to assess the tendencies of the failure modes of cement sheath during loading. Application of the proposed model on a triaxial test of undrained heating of oil well cement paste shows the capability of the model with to well reproduce the experimental results.
Thermo-poroelastic modelling of cement sheath: pore pressure response, thermal effect and thermo-osmotic effect
Niu, Zihua (author) / Shen, Jiyun (author) / Wang, Linlin (author) / Yang, Rongwei (author)
European Journal of Environmental and Civil Engineering ; 26 ; 657-682
2022-01-25
26 pages
Article (Journal)
Electronic Resource
Unknown
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