Evolution and analysis of gas sorption-induced coal fracture strain data

Abstract Although coal swelling/shrinking during coal seam gas extraction has been studied for decades, its impacts on the evolution of permeability are still not well understood. This has long been recognized, but no satisfactory solutions have been found. In previous studies, it is normally assume...
Ausführliche Beschreibung

Gespeichert in:

Autor*in:	Liu, Zhanghao [verfasserIn] Liu, Jishan [verfasserIn] Pan, Pengzhi [verfasserIn] Elsworth, Derek [verfasserIn] Wei, Mingyao [verfasserIn] Shi, Rui [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2020

Schlagwörter:	Coal seam gas Fracture strain Experimental data Equilibrium state Non-equilibrium state

Übergeordnetes Werk:	Enthalten in: Petroleum science - Beijing, 2007, 17(2020), 2 vom: 16. Jan., Seite 376-392
Übergeordnetes Werk:	volume:17 ; year:2020 ; number:2 ; day:16 ; month:01 ; pages:376-392

Links:	Volltext

DOI / URN:	10.1007/s12182-019-00422-z

Katalog-ID:	SPR039262227

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520			\|a Abstract Although coal swelling/shrinking during coal seam gas extraction has been studied for decades, its impacts on the evolution of permeability are still not well understood. This has long been recognized, but no satisfactory solutions have been found. In previous studies, it is normally assumed that the matrix swelling/shrinking strain can be split between the fracture and the bulk coal and that the splitting coefficient remains unchanged during gas sorption. In this study, we defined the fracture strain as a function of permeability change ratio and back-calculated the fracture strains at different states. In the equilibrium state, the gas pressure is steady within the coal; in the non-equilibrium state, the gas pressure changes with time. For equilibrium states, the back-calculated fracture strains are extremely large and may be physically impossible in some case. For non-equilibrium states, two experiments were conducted: one for a natural coal sample and the other for a reconstructed one. For the fractured coal, the evolution of permeability is primarily controlled by the transition of coal fracture strain or permeability from local matrix swelling effect to global effect. For the reconstituted coal, the evolution of pore strain or permeability is primarily controlled by the global effect.
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spelling	10.1007/s12182-019-00422-z doi (DE-627)SPR039262227 (SPR)s12182-019-00422-z-e DE-627 ger DE-627 rakwb eng 550 333.7 ASE 58.21 bkl Liu, Zhanghao verfasserin aut Evolution and analysis of gas sorption-induced coal fracture strain data 2020 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Although coal swelling/shrinking during coal seam gas extraction has been studied for decades, its impacts on the evolution of permeability are still not well understood. This has long been recognized, but no satisfactory solutions have been found. In previous studies, it is normally assumed that the matrix swelling/shrinking strain can be split between the fracture and the bulk coal and that the splitting coefficient remains unchanged during gas sorption. In this study, we defined the fracture strain as a function of permeability change ratio and back-calculated the fracture strains at different states. In the equilibrium state, the gas pressure is steady within the coal; in the non-equilibrium state, the gas pressure changes with time. For equilibrium states, the back-calculated fracture strains are extremely large and may be physically impossible in some case. For non-equilibrium states, two experiments were conducted: one for a natural coal sample and the other for a reconstructed one. For the fractured coal, the evolution of permeability is primarily controlled by the transition of coal fracture strain or permeability from local matrix swelling effect to global effect. For the reconstituted coal, the evolution of pore strain or permeability is primarily controlled by the global effect. Coal seam gas (dpeaa)DE-He213 Fracture strain (dpeaa)DE-He213 Experimental data (dpeaa)DE-He213 Equilibrium state (dpeaa)DE-He213 Non-equilibrium state (dpeaa)DE-He213 Liu, Jishan verfasserin aut Pan, Pengzhi verfasserin aut Elsworth, Derek verfasserin aut Wei, Mingyao verfasserin aut Shi, Rui verfasserin aut Enthalten in Petroleum science Beijing, 2007 17(2020), 2 vom: 16. Jan., Seite 376-392 (DE-627)565518909 (DE-600)2424436-3 1995-8226 nnns volume:17 year:2020 number:2 day:16 month:01 pages:376-392 https://dx.doi.org/10.1007/s12182-019-00422-z kostenfrei Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_374 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2014 GBV_ILN_2027 GBV_ILN_2055 GBV_ILN_2111 GBV_ILN_2190 GBV_ILN_2700 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 58.21 ASE AR 17 2020 2 16 01 376-392
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source	Enthalten in Petroleum science 17(2020), 2 vom: 16. Jan., Seite 376-392 volume:17 year:2020 number:2 day:16 month:01 pages:376-392
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authorswithroles_txt_mv	Liu, Zhanghao @@aut@@ Liu, Jishan @@aut@@ Pan, Pengzhi @@aut@@ Elsworth, Derek @@aut@@ Wei, Mingyao @@aut@@ Shi, Rui @@aut@@
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author	Liu, Zhanghao
spellingShingle	Liu, Zhanghao ddc 550 bkl 58.21 misc Coal seam gas misc Fracture strain misc Experimental data misc Equilibrium state misc Non-equilibrium state Evolution and analysis of gas sorption-induced coal fracture strain data
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topic_title	550 333.7 ASE 58.21 bkl Evolution and analysis of gas sorption-induced coal fracture strain data Coal seam gas (dpeaa)DE-He213 Fracture strain (dpeaa)DE-He213 Experimental data (dpeaa)DE-He213 Equilibrium state (dpeaa)DE-He213 Non-equilibrium state (dpeaa)DE-He213
topic	ddc 550 bkl 58.21 misc Coal seam gas misc Fracture strain misc Experimental data misc Equilibrium state misc Non-equilibrium state
topic_unstemmed	ddc 550 bkl 58.21 misc Coal seam gas misc Fracture strain misc Experimental data misc Equilibrium state misc Non-equilibrium state
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title	Evolution and analysis of gas sorption-induced coal fracture strain data
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title_full	Evolution and analysis of gas sorption-induced coal fracture strain data
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author_browse	Liu, Zhanghao Liu, Jishan Pan, Pengzhi Elsworth, Derek Wei, Mingyao Shi, Rui
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title_sort	evolution and analysis of gas sorption-induced coal fracture strain data
title_auth	Evolution and analysis of gas sorption-induced coal fracture strain data
abstract	Abstract Although coal swelling/shrinking during coal seam gas extraction has been studied for decades, its impacts on the evolution of permeability are still not well understood. This has long been recognized, but no satisfactory solutions have been found. In previous studies, it is normally assumed that the matrix swelling/shrinking strain can be split between the fracture and the bulk coal and that the splitting coefficient remains unchanged during gas sorption. In this study, we defined the fracture strain as a function of permeability change ratio and back-calculated the fracture strains at different states. In the equilibrium state, the gas pressure is steady within the coal; in the non-equilibrium state, the gas pressure changes with time. For equilibrium states, the back-calculated fracture strains are extremely large and may be physically impossible in some case. For non-equilibrium states, two experiments were conducted: one for a natural coal sample and the other for a reconstructed one. For the fractured coal, the evolution of permeability is primarily controlled by the transition of coal fracture strain or permeability from local matrix swelling effect to global effect. For the reconstituted coal, the evolution of pore strain or permeability is primarily controlled by the global effect.
abstractGer	Abstract Although coal swelling/shrinking during coal seam gas extraction has been studied for decades, its impacts on the evolution of permeability are still not well understood. This has long been recognized, but no satisfactory solutions have been found. In previous studies, it is normally assumed that the matrix swelling/shrinking strain can be split between the fracture and the bulk coal and that the splitting coefficient remains unchanged during gas sorption. In this study, we defined the fracture strain as a function of permeability change ratio and back-calculated the fracture strains at different states. In the equilibrium state, the gas pressure is steady within the coal; in the non-equilibrium state, the gas pressure changes with time. For equilibrium states, the back-calculated fracture strains are extremely large and may be physically impossible in some case. For non-equilibrium states, two experiments were conducted: one for a natural coal sample and the other for a reconstructed one. For the fractured coal, the evolution of permeability is primarily controlled by the transition of coal fracture strain or permeability from local matrix swelling effect to global effect. For the reconstituted coal, the evolution of pore strain or permeability is primarily controlled by the global effect.
abstract_unstemmed	Abstract Although coal swelling/shrinking during coal seam gas extraction has been studied for decades, its impacts on the evolution of permeability are still not well understood. This has long been recognized, but no satisfactory solutions have been found. In previous studies, it is normally assumed that the matrix swelling/shrinking strain can be split between the fracture and the bulk coal and that the splitting coefficient remains unchanged during gas sorption. In this study, we defined the fracture strain as a function of permeability change ratio and back-calculated the fracture strains at different states. In the equilibrium state, the gas pressure is steady within the coal; in the non-equilibrium state, the gas pressure changes with time. For equilibrium states, the back-calculated fracture strains are extremely large and may be physically impossible in some case. For non-equilibrium states, two experiments were conducted: one for a natural coal sample and the other for a reconstructed one. For the fractured coal, the evolution of permeability is primarily controlled by the transition of coal fracture strain or permeability from local matrix swelling effect to global effect. For the reconstituted coal, the evolution of pore strain or permeability is primarily controlled by the global effect.
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title_short	Evolution and analysis of gas sorption-induced coal fracture strain data
url	https://dx.doi.org/10.1007/s12182-019-00422-z
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author2	Liu, Jishan Pan, Pengzhi Elsworth, Derek Wei, Mingyao Shi, Rui
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up_date	2024-07-03T22:57:52.454Z
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Evolution and analysis of gas sorption-induced coal fracture strain data

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