Simulation and analysis of wormhole formation in carbonate rocks considering heat transmission process

Li, Yongming; Liao, Yi; Zhao, Jinzhou; Peng, Yu; Pu, Xuan

doi:10.1016/j.jngse.2017.02.048

Cited by 47 publications

(20 citation statements)

References 22 publications

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“…The most widely used one is the two-scale continuum model (TSC) developed by Panga et al [22] as it is advantageous at predicting the dissolution patterns observed in experiments and its accurate estimation of P V BT . For this reason, the TSC model is continuously extended to take into account the factors that affect the wormhole propagation [23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46]. For example, Kalia and Balakotaiah [23], and Cohen et al [24] extended the TSC model to the 2-D radial case by using the r − θ coordinates.…”

Section: Introductionmentioning

confidence: 99%

“…Combining the discrete fracture model with the TSC model, Liu et al [30,31] obtained a two-scale discrete fracture continuum model which can be used to evaluate the influence of fractures on wormhole formation. Kalia [32,33], and Li et al [34,35] coupled the heat transport to the TSC model to investigate the effect of temperature on the dissolution process. Wei et al [36] , Mahmoodi et al [37], and Babaei et al [38] used a two-phase flow field to study the influence of the presence of a nonaqueous phase on wormhole structure.…”

Section: Introductionmentioning

confidence: 99%

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Modeling and analysis of the acidizing process in carbonate rocks using a two-phase thermal-hydrologic-chemical coupled model

Liu

Yan

et al. 2019

Chemical Engineering Science

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Modeling and analysis of the acidizing process in carbonate rocks using a two-phase thermal-hydrologic-chemical coupled model

Liu

Yan

et al. 2019

Chemical Engineering Science

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“…All the values remain fixed unless otherwise stated. Because the effect of injection rate, acid properties and rock heterogeneous on dissolution patterns and breakthrough volume has been studied in detail in previous literature [6,27,32,44,[50][51][52][53][54], it will not be repeated here. This work only focuses on the influence of non-Darcy flow on the dissolution structure and breakthrough volume.…”

Section: Results and Analysismentioning

confidence: 99%

Three-dimensional simulation of acidizing process in carbonate rocks using the Darcy–Forchheimer framework

Liu

Ren

Kong

et al. 2020

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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Acidizing is an economical and effective practice to remove the near wellbore damage, which is performed by injecting acid into the formation through the wellbore. The injected acid dissolves the rock, by which the permeability nearby the wellbore can be improved. For a carbonate reservoir, the injected acid dissolves some of the minerals and some narrow and long channels, named wormholes, are formed then. These wormholes can bypass the damaged zone and hence improve the productivity of the well. The process for acid dissolving rocks involves complex physicochemical change, including the chemical reactions at the pore scale and the fluid flow at Darcy scale. In this paper, a 3-D reactive flow model with non-Darcy framework is developed based on the two-scale continuum model, and is solved by using the finite volume method. Five types of dissolution patterns, named face dissolution, conical wormhole, wormhole, ramified wormhole, and uniform dissolution, are obtained as the injection velocity increases. The effect of non-Darcy flow on dissolution pattern and breakthrough volume is analyzed. It is found that there is no effect of non-Darcy on dissolution structure and breakthrough volume when the injection velocity is very low. However, when the injection velocity is very high, the generated wormhole has more branches when using the Forchheimer equation than using the Darcy equation. Moreover, the optimal injection velocity is found to be the same whether considering the non-Darcy flow or not.

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“…Based on the improved DBF framework, a heat transfer model which considers the heat transmission process in matrix acidization is developed. The model is composed of the improved DBF framework and the energy conservation equation which can be expressed as the governing equation of the temperature T ( ) is the reaction heat [29]. and are the heat conduction coefficients of the fluid and solid phase, respectively, and thus is the average heat conduction coefficient between the two phases.…”

Section: Thermal Dbf Framework and Its Solution Schemementioning

confidence: 99%

“…The new model is the thermodynamically consistent DBF framework, which can be called the thermal DBF framework for short. Different from [29], this work studies matrix acidization in the form of linear flows. Meanwhile, fractures in the matrix are not considered, and a general matrix is acidized, which is different from [2].…”

Section: Introductionmentioning

confidence: 99%

A Newton’s Second Law Abided Darcy-Brinkman-Forchheimer Framework in Matrix Acidization Simulation

2019

Computational and Experimental Simulations in Engineering

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Matrix acidization is an important technique to enhance oil production at the tertiary recovery stage, and its numerical simulation is never concluded. From one of the earliest models, i.e. the two-scale model (Darcy framework), the Darcy-Brinkman-Forchheimer (DBF) framework is developed by adding Brinkman term and Forchheimer term to the momentum conservation equation. However, in the momentum conservation equation of the DBF framework, porosity is put outside of the time derivation term, which cannot describe the change of porosity well. Thus, this work changes the expression so that the modified momentum conservation equation can satisfy Newton's second law. The modified framework is called improved DBF framework. Furthermore, based on the improved DBF framework, the thermal DBF framework is given by introducing the energy balance equation to the improved DBF framework. Both of the frameworks are verified by the former works through numerical experiments and chemical experiments in labs. Parallelization to the codes of the complicated frameworks is also realized, and good scalability can be achieved.

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Simulation and analysis of wormhole formation in carbonate rocks considering heat transmission process

Cited by 47 publications

References 22 publications

Modeling and analysis of the acidizing process in carbonate rocks using a two-phase thermal-hydrologic-chemical coupled model

Modeling and analysis of the acidizing process in carbonate rocks using a two-phase thermal-hydrologic-chemical coupled model

Three-dimensional simulation of acidizing process in carbonate rocks using the Darcy–Forchheimer framework

A Newton’s Second Law Abided Darcy-Brinkman-Forchheimer Framework in Matrix Acidization Simulation

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