Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Water, $ CO_{2} $ and Argon Permeabilities of Intact and Fractured Shale Cores Under Stress
https://orcid.org/0000-0003-4924-0972
https://orcid.org/0000-0002-3101-470X
Abstract As shale is the caprock over many reservoirs targeted for $ CO_{2} $ storage, shale permeability to $ CO_{2} $ has become an important concern. Measurements of this permeability need to be performed under in-situ conditions, with realistic temperatures, confining pressures and fluid pressures, and the effects of variables such as pressure, temperature, and shale moisture content need to be thoroughly addressed. Furthermore, the exposure of wet shale to dry $ CO_{2} $ can lead to, for example, dehydration and two-phase flow, that in turn affect permeability. This paper reports shale permeability measurements performed on two shale core plugs from Svalbard, under in-situ pressure and temperature conditions relevant for $ CO_{2} $ storage, using argon, $ CO_{2,} $ and water as the permeate, and using both transient pulse and constant flow techniques. Permeability was found to be dependent mainly on effective confining pressure and on shale moisture content. The following was observed: (1) permeability decreased with increasing effective confining pressure; (2) permeability to water was lower than permeability to Ar or $ CO_{2} $; (3) shale moisture content had a strong inhibiting effect on the flow of Ar and $ CO_{2} $; (4) when a high $ CO_{2} $-flow was applied to a shale sample containing a hydrous pore fluid, a breakthrough effect occurred; and (5) in the presence of pore water, compaction creep can occur, causing a permanent decrease in permeability.
Water, $ CO_{2} $ and Argon Permeabilities of Intact and Fractured Shale Cores Under Stress
https://orcid.org/0000-0003-4924-0972
https://orcid.org/0000-0002-3101-470X
Abstract As shale is the caprock over many reservoirs targeted for $ CO_{2} $ storage, shale permeability to $ CO_{2} $ has become an important concern. Measurements of this permeability need to be performed under in-situ conditions, with realistic temperatures, confining pressures and fluid pressures, and the effects of variables such as pressure, temperature, and shale moisture content need to be thoroughly addressed. Furthermore, the exposure of wet shale to dry $ CO_{2} $ can lead to, for example, dehydration and two-phase flow, that in turn affect permeability. This paper reports shale permeability measurements performed on two shale core plugs from Svalbard, under in-situ pressure and temperature conditions relevant for $ CO_{2} $ storage, using argon, $ CO_{2,} $ and water as the permeate, and using both transient pulse and constant flow techniques. Permeability was found to be dependent mainly on effective confining pressure and on shale moisture content. The following was observed: (1) permeability decreased with increasing effective confining pressure; (2) permeability to water was lower than permeability to Ar or $ CO_{2} $; (3) shale moisture content had a strong inhibiting effect on the flow of Ar and $ CO_{2} $; (4) when a high $ CO_{2} $-flow was applied to a shale sample containing a hydrous pore fluid, a breakthrough effect occurred; and (5) in the presence of pore water, compaction creep can occur, causing a permanent decrease in permeability.
Water, $ CO_{2} $ and Argon Permeabilities of Intact and Fractured Shale Cores Under Stress
https://orcid.org/0000-0003-4924-0972
https://orcid.org/0000-0002-3101-470X
Abstract As shale is the caprock over many reservoirs targeted for $ CO_{2} $ storage, shale permeability to $ CO_{2} $ has become an important concern. Measurements of this permeability need to be performed under in-situ conditions, with realistic temperatures, confining pressures and fluid pressures, and the effects of variables such as pressure, temperature, and shale moisture content need to be thoroughly addressed. Furthermore, the exposure of wet shale to dry $ CO_{2} $ can lead to, for example, dehydration and two-phase flow, that in turn affect permeability. This paper reports shale permeability measurements performed on two shale core plugs from Svalbard, under in-situ pressure and temperature conditions relevant for $ CO_{2} $ storage, using argon, $ CO_{2,} $ and water as the permeate, and using both transient pulse and constant flow techniques. Permeability was found to be dependent mainly on effective confining pressure and on shale moisture content. The following was observed: (1) permeability decreased with increasing effective confining pressure; (2) permeability to water was lower than permeability to Ar or $ CO_{2} $; (3) shale moisture content had a strong inhibiting effect on the flow of Ar and $ CO_{2} $; (4) when a high $ CO_{2} $-flow was applied to a shale sample containing a hydrous pore fluid, a breakthrough effect occurred; and (5) in the presence of pore water, compaction creep can occur, causing a permanent decrease in permeability.
Water, $ CO_{2} $ and Argon Permeabilities of Intact and Fractured Shale Cores Under Stress
van Noort, Reinier (Autor:in) / Yarushina, Viktoriya (Autor:in)
2018
Aufsatz (Zeitschrift)
Englisch
Lokalklassifikation TIB:
560/4815/6545
BKL:
38.58
Geomechanik
/
56.20
Ingenieurgeologie, Bodenmechanik
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