Numerical simulation of gas flow in artificial fracture coal by three-dimensional reconstruction based on computed tomography

Wang, Gang; Chu, Xiangyu; Yang, Xinxiang

doi:10.1016/j.jngse.2016.07.039

Cited by 53 publications

(16 citation statements)

References 21 publications

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“…There was no fluid flow through the four closed sides. The flow process was in quasisteady state, and the flow parameters only changed with space but not over time [35]. The model ambient conditions were room temperature.…”

Section: Simulation Of the Non-darcy Experimentmentioning

confidence: 99%

Numerical Simulation of the Non-Darcy Flow Based on Random Fractal Micronetwork Model for Low Permeability Sandstone Gas Reservoirs

Chen

2020

Geofluids

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Darcy’s law is not suit for describing high velocity flow in the near wellbore region of gas reservoirs. The non-Darcy coefficient β of the Forchheimer’s equation is a main parameter for the evaluation of seepage capacity in gas reservoirs. The paper presented a new method to calculate β by performing gas and con-water flow simulations with random 3D micropore network model. Firstly, a network model is established by random fractal method. Secondly, based on the network simulation method of non-Darcy flow in the literature of Thauvin and Mohanty, a modified model is developed to describe gas non-Darcy flow with irreducible water in the porous medium. The model was verified by our experimental measurements. Then, we investigated the influence of different factors on the non-Darcy coefficient, including micropore structure (pore radius and fractal dimension), irreducible water saturation ( S wi ), tortuosity, and other reservoir characteristics. The simulation results showed that the value of the non-Darcy coefficient decreases with the increase in all: the average pore radius, fractal dimension, irreducible water saturation, and tortuosity. The non-Darcy coefficients obtained by the fractal method of microparameters are estimated more precisely than the conventional methods. The method provides theoretical support for the productivity prediction of non-Darcy flow in gas reservoirs.

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Section: Simulation Of the Non-darcy Experimentmentioning

confidence: 99%

Numerical Simulation of the Non-Darcy Flow Based on Random Fractal Micronetwork Model for Low Permeability Sandstone Gas Reservoirs

Chen

2020

Geofluids

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“…Its basic principle is imaging plus calculation. CT three-dimensional reconstruction is a key technology that can be used for the accurate and nondestructive three-dimensional characterization of fractures in coal bodies and for the clear observation of pore fracture structures [31][32] .…”

Section: A Three-dimensional Reconstruction Of Coal Fissure Structurementioning

confidence: 99%

Progress in Research of Characterization Methods for Pore and Fissure Structures in Coal

Wang¹,

Shen²,

Qin³

et al. 2018

Proceedings of the 9th China-Russia Symposium “Coal in the 21st Century: Mining, Intelligent Equipment and Environment Protecti

Self Cite

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The pore and fissure of coal directly affect the occurrence and seepage of gas. Therefore, it coal seam methane should be developed for utilization and gas control. In this study, characterization methods for coal fractures are introduced on the basis of extensive literature research. They are usually divided into observation and physical test methods, and their principle and research status of each method are reviewed in detail. The application of CT three-dimensional reconstruction and fractal dimension in the physical progress of digital rock is also presented. Keywords-coal, pore and fissure, characterization method, three-dimensional reconstructionwhere ρd is the true density of dry coal, and ρp,d is the apparent density of dry coal (g/cm 3 ).(2) Nitrogen adsorption method. In this method, the amount of nitrogen adsorbed by dry degassed powders in liquid nitrogen is measured at different pressures, andThe 9th Russian-Chinese Symposium. Coal in the 21st Century: Mining, Intelligent Equipment and Environmental Protection

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“…Three-dimensional (3-D) reconstruction modeling technology is a numerical simulation method developed based on the X-ray CT in conjunction with the numerical modeling technique. 7,31,42,43 It offers opportunities in evaluating the microstructural deformation, 44 gas and fluid flow, [45][46][47] and mechanical parameter variation in coal and rock, based on natural specimens. This approach was also introduced and verified by Zhao et al 48 and considered suitable for investigating the loading-rate-dependent UCS of coal.…”

Section: Introductionmentioning

confidence: 99%

Loading rates dependency of strength anisotropy in coal: Based on the three‐dimensional reconstruction modeling technology

Song

Zhao

Wang

et al. 2021

Energy Science & Engineering

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Numerical simulation of gas flow in artificial fracture coal by three-dimensional reconstruction based on computed tomography

Cited by 53 publications

References 21 publications

Numerical Simulation of the Non-Darcy Flow Based on Random Fractal Micronetwork Model for Low Permeability Sandstone Gas Reservoirs

Numerical Simulation of the Non-Darcy Flow Based on Random Fractal Micronetwork Model for Low Permeability Sandstone Gas Reservoirs

Progress in Research of Characterization Methods for Pore and Fissure Structures in Coal

Loading rates dependency of strength anisotropy in coal: Based on the three‐dimensional reconstruction modeling technology

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