How gas adsorption and swelling affects permeability of coal: A new modelling approach for analysing laboratory test data

Shi, Ji‐Quan; Durucan, Şevket; Shimada, Sohei

doi:10.1016/j.coal.2014.04.012

Cited by 61 publications

(21 citation statements)

References 22 publications

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“…McKee et al model (1988) The permeability of coal for non-or weakly adsorbing gas (such as He and N 2 ) is known to be highly stress-dependent and has been verified in laboratory tests to generally decrease exponentially with increasing effective stress in (e.g., Durucan and Edwards, 1986;Somerton et al, 1975;Shi et al, 2014). Eq.…”

Section: Review Of Permeability Modelsmentioning

confidence: 98%

The impact of effective stress and gas slippage on coal permeability under cyclic loading

Zou

Chen

et al. 2016

Journal of Natural Gas Science and Engineering

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Section: Review Of Permeability Modelsmentioning

confidence: 98%

The impact of effective stress and gas slippage on coal permeability under cyclic loading

Zou

Chen

et al. 2016

Journal of Natural Gas Science and Engineering

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“…The permeability, which is used to describe the fluidity of the coal seam gas, is almost entirely provided by the cleats. It is known to be highly stress-dependent and has been shown to generally reduce exponentially with increasing net confining stress [52] and the stress dependency of coal permeability may be described as [53]:…”

Section: The Role Of Destress On Fracture Formationmentioning

confidence: 99%

Improvement of coal seam gas drainage by under-panel cross-strata stimulation using highly pressurized gas

Wang

Yang

et al. 2015

International Journal of Rock Mechanics and Mining Sciences

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“…The permeability of coal seam changes after the injection of supercritical CO 2 . Shi et al (2014) studied the permeability of coal seam injected CO 2 . This coal seam permeability model has the same form in the cylindrical coordinates and considered the effect of pore press and strain of coal seam changes as:…”

Section: The Calculation Model Of Cement-formation Interface Debondinmentioning

confidence: 99%

“…This method depends on the higher CO 2 adsorption/sorption capacity than CH 4 and most other adsorbing gases underground of coal seam and utilizes the injecting CO 2 from the ground to the bottom hole to replace the adsorbed CH 4 to free state (Haszeldine 2009;Mackay 2013). The injection of gas increases the pore fracture pressure and drives the free gas flowing out of the CBM production well, and thus increases the production and recovery of CH 4 (Mitra et al 2008;Shi et al 2014).…”

Section: Introductionmentioning

confidence: 99%

A model of cement-formation interface failure length in supercritical CO2-ECBM and storage injection well considering the coal swelling effect under high pressure

Wang

2019

J Petrol Explor Prod Technol

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The swelling effect of high-pressure carbon dioxide (CO 2) in coal seam is obvious. In the restrained deep formation, it is converted to stress acting on the wellbore and the caprock. The action stress is concentrated near the wellbore and poses a threat to the cement-formation interface. Due to interface failure to micro-annulus, wellbore integrity will be lost and this will have an impact on carbon dioxide-enhanced coalbed methane recovery (CO 2-ECBM) and storage. In this paper, the pseudo-steady pressure distribution and steady pressure distribution of CO 2 injection process were established after considering the change in permeability of coal seam injected with high-pressure supercritical CO 2 , and the vertical stress distribution model was derived. A one-dimensional radial numerical simulation formed by iterative method was established. A model for calculating the failure length at the cement-formation interface is obtained, and the shear stress and debonding length at the interface at various injection rates and times are calculated. The results show that the shear stress on the cement-formation interface has the maximum magnitude on the height of the interface between coal seam and caprock. The shear stress generated by coal swelling may break the fragile cement-formation interface into a narrow debonding interface. The injection rate has an influence on the interface failure length. For the same total injection amount, low injection rate is beneficial to protect the cement-formation interface integrity. This study provides a reference for the design of maximum injection speed for CO 2-ECBM and storage to avoid leakage.

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How gas adsorption and swelling affects permeability of coal: A new modelling approach for analysing laboratory test data

Cited by 61 publications

References 22 publications

The impact of effective stress and gas slippage on coal permeability under cyclic loading

The impact of effective stress and gas slippage on coal permeability under cyclic loading

Improvement of coal seam gas drainage by under-panel cross-strata stimulation using highly pressurized gas

A model of cement-formation interface failure length in supercritical CO2-ECBM and storage injection well considering the coal swelling effect under high pressure

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