Geomechanical aspects of reservoir thermal alteration: A literature review

Uribe-Patiño, J.A.; Alzate-Espinosa, G. A.; Arbelaez-Londoño, Alejandra

doi:10.1016/j.petrol.2017.03.012

Cited by 23 publications

(11 citation statements)

References 122 publications

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“…Circulating mud through the cased borehole or injecting fluid into the reservoir can vary the temperature field around the borehole. This has an impact on the borehole stability (Stephens and Voight 1982;Wang et al 1996;Chen and Ewy 2005;Hou and Luo 2011;Yan et al 2014;Kanfar et al 2015;Gao et al 2017). For example, as the temperature increases at the borehole wall, both fracture pressure and collapse pressure will rise (Yan et al 2014).…”

Section: Introductionmentioning

confidence: 99%

“…After thermoelasticity and poroelasticity has been introduced by Biot's work (1941Biot's work ( , 1955Biot's work ( , 1956), many pieces of Table 1 Volumetric thermal expansion coefficients of several minerals and water at room temperature research have been developed afterward; some are highlighted here (for comprehensive reviews see, for example, Li 1998 andUribe-Patiño et al 2017). Biot's work has been extended by several authors to the thermo-pore-elasticity (Rice and Cleary 1976;Bear and Corapcioglu 1981;Palciauskas and Domenico 1982;Detournay and Cheng 1988;Kurashige 1989;McTigue 1990;Coussy 1995;Cui et al 1997).…”

Section: Introductionmentioning

confidence: 99%

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Can Heating Induce Borehole Closure?

et al. 2020

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The current study shows that heating a cased borehole in low-permeability shale rock can induce plastic deformation, leading to the closure of the casing annulus and decreasing annulus connectivity. The thermally induced borehole closure is interesting for the field operation of plug and abandonment (P&A), as it potentially saves operation cost and time by avoiding cutting casing and cementing. Lab experiments and numerical simulations are implemented to investigate the thermally induced borehole closure. Pierre shale and a field shale are tested. The lab experiments are performed by heating the borehole wall in a 10-cm-OD hollow cylinder specimen. Here, a novel experimental setup is applied, allowing for measuring temperature and pore pressure at different radii inside the specimen. Both the experimental data and the post-test CT images of the rock samples indicate the rock failure by borehole heating, and under certain conditions, heating results in an annulus closure. The decrease of hydraulic conductivity through the casing annulus is observed, but this decrease is not enough to form the hydraulic-sealed annulus barrier, based on the results obtained so far. Lab-scale finite-element simulations aim to match the lab results to obtain poro-elastoplastic parameters. Then the field-scale simulations assess the formation of shale barriers by heating in field scenarios. Overall, (i) the lab experiments show that heating a borehole can increase the pore pressure in shale and hence induce rock failure; (ii) the numerical simulations match the experimental results reasonably well and indicate that the heating-induced borehole closure can sufficiently seal the casing annulus in the field-scale simulation.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Can Heating Induce Borehole Closure?

et al. 2020

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“…Injection of the hot steam under the high pressure leads to the various geomechanical phenomena. For example, dilation and fracture significantly increase the porosity whereas compaction of soil grains and its thermal expansion reduces it [2]. Moreover, excessive stresses in the reservoir can break the integrity of the steam chamber.…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of a caprock integrity during oil production by steam-assisted gravity drainage method

Kostina

Zhelnin²,

Plekhov³

2019

Frattura Ed Integrità Strutturale

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The work is devoted to the investigation of a caprock integrity during oil production by steam-assisted gravity drainage method. An originally proposed thermo-hydro-mechanical model was used for the evaluation of mechanical loading acting on the over-burden. The model includes mass conservation laws, the energy conservation law and the linear momentum balance. Filtration of each phase of the three-phase flow (steam, oil and water) is described by Darcy's law. Effective stress concept is used to take into account the effect of pore pressure on the stress-strain state. Inelastic deformations are described by the phenomenological viscoplastic model based on Drucker-Prager yield criterion. Two qualitatively and quantitatively different scenarios of porosity evolution are considered. The first scenario corresponds to the case of the pore compression while the second one describes increase in porosity induced by the volumetric strains. The obtained stress-strain state in the reservoir was used for the assessment of the caprock integrity for both cases of porosity evolution. In addition, the effect of the porosity evolution on the oil production rate is studied. It has been shown that the oil production rate strongly depends on the prevailing physical mechanism of the porosity evolution.

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“…16 Field observations and laboratory studies remark that the temperature of the injecting fluid also contributes to continuous changes in the reservoir stress state; cold injecting fluid cools down the rock, causing it to contract and leading to a decrease in effective stress and increased permeability. 8,17 In a study of mechanical behavior of chalk cores exposed to temperature cycling, Voake et al 18 observed more irreversible strain in chalk cores that experienced temperature fluctuations compared to cores tested at constant temperature.…”

Section: Introductionmentioning

confidence: 99%

Permeability Evolution of Shear Failing Chalk Cores under Thermochemical Influence

Kallesten¹,

Madland²,

Korsnes³

et al. 2019

IOR 2019 – 20th European Symposium on Improved Oil Recovery

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Development of petroleum reservoirs, including primary depletion of the pore pressure and repressurization during water injection naturally, leads to changes in effective stresses of the formations. These changes impose mechanical deformation of the rock mass with subsequent altering of its petrophysical properties. Besides mechanical compaction, chalk reservoirs on the Norwegian Continental Shelf also seem susceptible to mineralogical and textural changes as an effect of the injecting fluid's chemical composition and temperature. Understanding such chemical and thermal effects and how they interplay with the mechanical response to changes in effective stresses could contribute to improved prediction of permeability development during field life. This article presents results from mechanical testing of chalk cores of medium-porosity (32%) outcrop chalk (Niobrara Formation, Kansas) in triaxial cells. The experimental setup allows systematic combinations of fluctuating deviatoric stress, temperature (50 and 130°C), and injecting fluid (calcite-equilibrated sodium chloride, calcite-equilibrated sodium sulfate, and reactive synthetic seawater) intended to replicate in situ processes, relevant to the North Sea chalk reservoirs. Deviatoric loading above yield resulted in a shear failure with a steeply dipping fracture of the core and a simultaneous increase in permeability. This occurred regardless of the brine composition. The second and third deviatoric loadings above yield did not have the same strong effect on permeability. During creep and unloading, the permeability changes were minor such that the end permeability remained higher than the initial values. However, sodium sulfate-injected cores retained most of the permeability gain after shear fracturing compared to sodium chloride and synthetic seawater series at both temperatures. Synthetic seawater-injected cores registered the most permeability loss compared to the other brines at 130°C. The results indicate that repulsive forces generated by sulfate adsorption contribute to maintain the fracture permeability.

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Geomechanical aspects of reservoir thermal alteration: A literature review

Cited by 23 publications

References 122 publications

Can Heating Induce Borehole Closure?

Can Heating Induce Borehole Closure?

Numerical analysis of a caprock integrity during oil production by steam-assisted gravity drainage method

Permeability Evolution of Shear Failing Chalk Cores under Thermochemical Influence

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