Gas-induced swelling in coal

Reucroft, P. J.; Patel, Hasmukh A.

doi:10.1016/0016-2361(86)90075-x

Cited by 158 publications

(78 citation statements)

References 16 publications

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“…3). The results abovementioned is identical to the those obtained by Thomas and Damberger [6] , Reucroft and Patel [7] and Levin [8] .…”

Section: Modeled Resultssupporting

confidence: 81%

Self-adjusted elastic action and its CBM pool-forming effect of the high rank coal reservoir

Qin

et al. 2005

Chin.Sci.Bull.

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The coal reservoir is a kind of geologic body with considerable elasticity, and its response to stress is more sensitive than the routine ones. In the pool-forming process of the coalbed methane, (CBM) the action of many external geodynamic factors in the coal reservoir is represented by the ability of CBM's diffusion and migration in the coal reservoir. Therefore, the occurrence of the natural fissures in the coal reservoir becomes a key that determines whether the CBM pool can be formed or not. Based on the principle, the authors have designed a comprehensive method of physical modeling to study the elasticity of the coal matrix block with different coal ranks in the light of the solid to fluid coupling, have established the model of the volume deformation (selfadjusted elastic effect) of the coal reservoir under the condition of the effective stress-adsorption/desorption, and have obtained a correct understanding of the law of the elastic deformation. Afterwards, a new viewpoint, named as the self-closing elastic effect for forming the CBM pool in the high rank reservoir, is put forward, providing an initial point and a scientific basis for a further investigation into its dynamic factors, possible mechanism and role in the CBM energy-balancing system.Although the CBM pool-forming process is controlled by many geodynamic factors, its key depends on the relatively closed geological environment derived from a favorable match among these factors, in which the tectonic stress field, hydrodynamic field of groundwater, geothermal field and strata contribute to the formation of such environment. However, these factors first act on the coal reservoir itself, which is represented by the diffusing and migrating ability of CBM within the coal reservoir. Coal itself is quite unfavorable for CBM diffusion. Therefore, the occurrence of the natural fissures in the coal seam, especially the opening or closing extent of the natural fissures during the geological history, becomes a key factor that determines whether the CBM pool can be formed or not.Before being broken under stress, coal is a kind of elastic body with a rather compressible or swellable capacity. Taking as a kind of the organic reservoir mainly composed of organic matters, the response of the coal reservoir to stress is more sensitive than some routine ones such as sandstone and carbonate rock reservoirs. So the direct dynamic factors determining the opening or closing extent of the natural fissures in the coal reservoir include two aspects. The first is the effective stress, which is expressed as the pressure difference of the overall stress, being perpendicular to the fissure strike, to the fluid pressure in pores and fissures within the coal reservoir, and with increasing the effective stress the fissures are compressed so as to become narrow or even close. The second is the swelling-shrinking effect of the coal matrix block surrounded by natural fissures. The fissures becomes narrow due to the swelling effect derived from the absorbing gas, while the desorpt...

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“…3). The results abovementioned is identical to the those obtained by Thomas and Damberger [6] , Reucroft and Patel [7] and Levin [8] .…”

Section: Modeled Resultssupporting

confidence: 81%

Self-adjusted elastic action and its CBM pool-forming effect of the high rank coal reservoir

Qin

et al. 2005

Chin.Sci.Bull.

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“…Proximate analysis of coal (Mahajan and Walker 1971;Bhattacharyya 1972;Reucroft and Patel 1986;Banerjee 1988, Barker-Read andYalçin and Durucan 1991;DeGance et al 1993;Chaback et al 1996;Clarkson et al 1997;Ö zgen Karacan and Okandan 2000;Laxminarayana and Crosdale 2002;Qin et al 2007;Saghafi et al 2007;Dutta et al 2008;Yu et al 2008a, b, c;Pini et al 2009;Pone et al 2009;Battistutta et al 2010;Gensterblum et al 2010;He et al 2010;Pan et al 2010;Kim et al 2011;Zheng 2012;Wang 2012;Jiang et al 2012;Kutchko et al 2013;An et al 2013;Hao et al 2013;Xiao et al 2016) consists of moisture, ash, volatile, fixed carbon. The widely-used index are: air dried basis (ad), dry basis (d), dry ash-free basis (daf).…”

Section: Methodsmentioning

confidence: 99%

“…Ultimate analysis specifies the elements of carbon, hydrogen, nitrogen, oxygen and sulphur Joubert et al 1973;Nandi and Walker 1975;Nelson et al 1980;Reucroft and Yang and Saunders 1985;Reucroft and Patel 1986;Banerjee 1988;Giuliani et al 1991;DeGance et al 1993;Chaback et al 1996;Fitzgerald et al 2005;Chang et al 2006;Qin et al 2007;Siemons et al 2007;Chang et al 2008;Majewska et al 2009;Radliński et al 2009;Pone et al 2009;Battistutta et al 2010;Gensterblum et al 2010;Kim et al 2011;Hao et al 2012Hao et al , 2013Lin et al 2013). Widely-used indexes for ultimate analysis are: dry ash-free basis, air dried basis.…”

Section: Methodsmentioning

confidence: 99%

“…Figure 13 shows the relationship between Oxygen content and vitrinite reflectance (R o;max ). Figure 13 shows the relationship between oxygen content and vitrinite reflectance: Qin et al 2007;Chang et al 2008;Lin et al 2013)-152, English(Allardice andEvans 1971;Bhattacharyya 1972;Gan et al 1972;Joubert et al 1973Joubert et al , 1974Nandi and Walker 1975;Reucroft and Patel 1986;Banerjee 1988;Giuliani et al 1991;DeGance et al 1993;Chaback et al 1996;Martyniuk and Wiȩckowska 1997;Fitzgerald et al 2005;Dai et al 2006;Siemons et al 2007;Majewska and Ziętek 2007;Day et al 2008;Pone et al 2009;Radliński et al 2009;Majewska et al 2009;Kędzior 2009;Majewska et al 2010;Battistutta et al 2010;Gensterblum et al 2010;Kim et al 2011;Taraba 2011;Sakurovs 2012;Hao et al 2013)-220) Effects of coal rank on physicochemical properties of coal and on methane adsorption 141 …”

Section: Oxygen Content Effect On Adsorption Capacitymentioning

confidence: 99%

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Effects of coal rank on physicochemical properties of coal and on methane adsorption

Cheng

Jiang

Zhang

et al. 2017

Int J Coal Sci Technol

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For the thorough research on coal metamorphism impact on gas adsorption capacity, this paper collected and summarized parameters of experimental adsorption isotherms, coal maceral, proximate analysis and ultimate analysis obtained from National Engineering Research Center of Coal Gas Control and related literatures at home and abroad, systematically discussed the coal rank effect on its physicochemical properties and methane adsorption capacity, in which the coal rank was shown in Vitrinite reflectance, furthermore, obtained the Semi-quantitative relationship between physicochemical properties of coal and methane adsorption capacity.

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“…With this apparatus, preparation and use of the coal samples are similar to these in optical methods and strain can be detected and recorded by a static state resistance strain gauge meter when the length of coal block is changed if swelling or shrinkage occurs. Table 4 summarizes some coal strain data as reported in Reucroft and Patel [74] conducted dilatometric studies on three types of Kentucky coals of varying carbon content in a number of gaseous environments. In particular they found that at a CO 2 pressure of about 0.14 MPa (20 psi) and 298 K the volume increase was inversely proportional to carbon content.…”

Section: Measurement Of Sorption-induced Stainmentioning

confidence: 98%

A review on transport of coal seam gas and its impact on coalbed methane recovery

Wang

Xiao-dong

Wei

et al. 2011

Front. Chem. Sci. Eng.

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This paper presents a summary review on mass transport of coal seam gas (CSG) in coal associated with the coalbed methane (CBM) and CO 2 geo-sequestration enhanced CBM (CO 2 -ECBM) recovery and current research advances in order to provide general knowledge and fundamental understanding of the CBM/ECBM processes for improved CBM recovery. It will discuss the major aspects of theory and technology for evaluation and development of CBM resources, including the gas storage and flow mechanism in CBM reservoirs in terms of their differences with conventional natural gas reservoirs, and their impact on CBM production behavior. The paper summarizes the evaluation procedure and methodologies used for CBM exploration and exploitation with some recommendations.

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Gas-induced swelling in coal

Cited by 158 publications

References 16 publications

Self-adjusted elastic action and its CBM pool-forming effect of the high rank coal reservoir

Self-adjusted elastic action and its CBM pool-forming effect of the high rank coal reservoir

Effects of coal rank on physicochemical properties of coal and on methane adsorption

A review on transport of coal seam gas and its impact on coalbed methane recovery

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