Study of oil filtration in porous media under the steam-assisted gravity drainage process

Kostina, A.; Zhelnin, M.; Plekhov, O.

doi:10.7242/1998-2097/2018.3.1

Cited by 5 publications

(3 citation statements)

References 15 publications

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“…(8)-(12) Heat Transfer and Structural Mechanics modules were used. The more detailed description of the algorithm can be found in [29]. The developed numerical algorithm has been applied to the three-dimensional numerical simulation of the rectangular reservoir containing two horizontal wells (injection and production).…”

Section: Resultsmentioning

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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Section: Resultsmentioning

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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“…Для решения системы уравнений был разработан численный алгоритм [44], основные этапы которого приведены ниже:…”

Section: численная реализация моделиunclassified

“…Данная работа посвящена анализу ключевых моделей пористости применительно к ПГД, поскольку сложность и физическая связанность протекающих при этом процессов может приводить к принципиально различным результатам. Для описания ПГД была разработана модель, которая включает в себя уравнения баланса массы для трехфазной жидкости, закон сохранения энергии с учетом фазового перехода, возникающего при испарении пара и конденсации воды, а также закон Дарси для описания фильтрационного течения [44].…”

Section: Introductionunclassified

Analysis of models for porosity evolution in reservoir during steam injection

Kostina

Zhelnin

Plekhov

2019

PNRPU Mechanics Bulletin

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Depletion of traditional hydrocarbon reserves leads to the development of extracting methods for heavy crude oil and bitumen characterized by extremely high viscosity. The most effective technology is the steam-assisted gravity drainage. The aim of this method is to decrease oil viscosity by injection of hot steam into the reservoir. Increase of temperature, pore pressure and change of stress-strain state during this process significantly affect porosity which is the key storage parameter of the reservoir. This work is devoted to the analysis of models for porosity evolution during the steam-assisted gravity drainage process. The authors have developed an original model to describe steam-assisted gravity drainage which includes the mass balance equation for a three-phase flow, the energy balance equation involving latent heat due to vaporization/condensation of water/steam and Darcy’s law for fluid filtration. Numerical implementation of the proposed equations was based on the pressure-saturation algorithm. The results have shown a substantial qualitative and quantitative disagreement between the considered models. Coupling of porosity with volumetric strain leads to the rise of its magnitude. Models relating porosity to pore pressure show simultaneous existence of high-porous (near the injection well) and low-porous (near the production well) areas. In case when porosity is dependent on effective stress a circular area of a compacted soil is formed. Therefore, to obtain a correct estimation of the oil production rate in an arbitrary reservoir it is necessary to define the prevailing mechanism of porosity evolution (volumetric strain, pore pressure or effective stress).

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Numerical Simulation of Rock Damage Induced by Steam Injection in a Horizontal Wellbore during the Crude Oil Production

Kostina

Zhelnin

Plekhov

et al. 2019

Procedia Structural Integrity

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Study of oil filtration in porous media under the steam-assisted gravity drainage process

Cited by 5 publications

References 15 publications

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

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

Analysis of models for porosity evolution in reservoir during steam injection

Numerical Simulation of Rock Damage Induced by Steam Injection in a Horizontal Wellbore during the Crude Oil Production

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