Non-isothermal injection-induced geomechanics in a porous layer confined with flexible sealing rocks

Zhai, Xinle; Atefi-Monfared, Kamelia

doi:10.1016/j.ijrmms.2019.104173

Cited by 8 publications

(2 citation statements)

References 34 publications

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“…The theory of poroelasticiy, proposed by Terzaghi 20 and extended by Biot, 21 is the first theory developed to assess the coupling between in situ fluids and the soil skeleton. Numerous studies have since been reported on predicting pore pressure‐deformation alterations in geological reservoirs using the theory of poroelasticity 22–29 . Biot 30,31 proposed the theory of thermo‐poroelasticty based on irreversible thermodynamics in order to describe thermal‐fluid effects on in situ stress‐strains in geomaterials.…”

Section: Introductionmentioning

confidence: 99%

Thermo‐poroelasticity under temporal flux in low permeable layer confined with flexible sealing media

Zhai

Atefi-Monfared

2020

Num Anal Meth Geomechanics

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Analytical formulation of nonisothermal injection in geological reservoirs remains challenging, and researchers have adopted a number of simplifying assumptions to theoretically predict the resulting geomechanical alterations. One common assumption behind current thermo‐poroelastic solutions is a constant temperature and constant pore pressure in the reservoir rock adjacent to the source/sink, which results in an unrealistic discontinuity in the rock temperature profile, ignoring the gradual geomechanical changes at this location. Another common assumption in previous studies is the plane strain approximation, thus ignoring vertical interactions between the target layer and the surrounding rocks. This paper presents new closed‐form thermo‐poroelastic solutions for nonisothermal injection in a low permeable porous layer confined with flexible sealing rocks. The transient nature of temperatures in the rock adjacent to the source/sink is incorporated through implication of a temporal heat and fluid flux boundary condition. The impact of vertical confinement is also integrated using the Winkler model. The proposed solutions are proven to capture generation of short‐term thermal‐induced pore pressures near the wellbore, which cannot be captured using conventional solutions. It is also demonstrated that the conventional solutions obtained using constant pore pressure and temperature boundary are in fact a special case of the proposed solutions, and the latter yield the former where the heat transfer between the source/sink and the rock occurs quite rapidly. The vertical confinement is also shown to have a notable impact on the induced stresses‐strains, and thus should be incorporated when studying wellbore stability or assessing seal rock integrity during nonisothermal injection.

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Section: Introductionmentioning

confidence: 99%

Thermo‐poroelasticity under temporal flux in low permeable layer confined with flexible sealing media

Zhai

Atefi-Monfared

2020

Num Anal Meth Geomechanics

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“…The thermo-hydraulic-mechanical (THM) behavior of low permeable media is of crucial significant in numerous projects including unconventional shale oil and tight sand [1], enhanced geothermal, and waste disposal [2,3]. Numerous researchers have studied the THM response of the porous media under different conditions (loading, material anisotropy, wellbore inclination, and heat transfer mechanisms) using the thermo-poroelastic theory [4][5][6][7][8][9]. The majority of the relevant literature was developed assuming local thermal equilibrium (LTE), where identical temperature is assumed for both the solid and fluid phases.…”

Section: Introductionmentioning

confidence: 99%

Impact of local thermal non-equilibrium on temporal thermo-hydro-mechanical processes in low permeable porous media

Zhai

Atefi-Monfared

2020

E3S Web Conf.

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The thermo-hydraulic-mechanical (THM) response of low permeable media is of crucial significance in thermal fracturing for production of unconventional shale oil, enhanced geothermal systems, and waste disposal. During such processes, pore pressures and stresses change in a spatiotemporal manner due to hydraulic and thermal loadings. From the viewpoint of the energy balance equation, the available theoretical studies can be classified as local thermal equilibrium (LTE), and local thermal non-equilibrium (LTNE) models. LTE models consider identical temperature for different phase of the porous system. LTNE models allow different temperature variations in solid and fluid phases of a porous medium. Current LTNE studies are weakly-coupled – not incorporating thermo-osmosis. This paper presents novel coupled LTNE thermo-poroelastic solutions in a transversely isotropic saturated porous medium, incorporating thermo- osmosis effect. Solutions are obtained for permeable and impermeable boundaries. Thermo-osmosis is found to have a very different effect in case of LTNE versus LTE, resulting in a fundamentally different THM response. LTNE effect analysis reveals different THM responses under different heat transfer properties at the solid-fluid interface in low permeable strata.

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Novel Modeling of Non-Isothermal Flow-Induced Fine Particle Migration in Porous Media Based on the Derjaguin-Landau-Verwey-Overbeek Theory

Zhai,

Atefi-Monfared

2024

Transp Porous Med

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Non-isothermal injection-induced geomechanics in a porous layer confined with flexible sealing rocks

Cited by 8 publications

References 34 publications

Thermo‐poroelasticity under temporal flux in low permeable layer confined with flexible sealing media

Thermo‐poroelasticity under temporal flux in low permeable layer confined with flexible sealing media

Impact of local thermal non-equilibrium on temporal thermo-hydro-mechanical processes in low permeable porous media

Novel Modeling of Non-Isothermal Flow-Induced Fine Particle Migration in Porous Media Based on the Derjaguin-Landau-Verwey-Overbeek Theory

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