Creating Cloud-Fracture Network by Flow-induced Microfracturing in Superhot Geothermal Environments
Abstract Superhot geothermal environments with temperatures of approximately 400–500 °C at depths of approximately 2–4 km are attracting attention as new kind of geothermal resource. In order to effectively exploit the superhot geothermal resource through the creation of enhanced geothermal systems...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Goto, Ryota [verfasserIn] |
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| Format: |
Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2021 |
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| Schlagwörter: |
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| Anmerkung: |
© The Author(s), under exclusive licence to Springer-Verlag GmbH, AT part of Springer Nature 2021 |
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| Übergeordnetes Werk: |
Enthalten in: Rock mechanics and rock engineering - Springer Vienna, 1983, 54(2021), 6 vom: 24. März, Seite 2959-2974 |
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| Übergeordnetes Werk: |
volume:54 ; year:2021 ; number:6 ; day:24 ; month:03 ; pages:2959-2974 |
| Links: |
|---|
| DOI / URN: |
10.1007/s00603-021-02416-z |
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OLC2126265250 |
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| 245 | 1 | 0 | |a Creating Cloud-Fracture Network by Flow-induced Microfracturing in Superhot Geothermal Environments |
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| 520 | |a Abstract Superhot geothermal environments with temperatures of approximately 400–500 °C at depths of approximately 2–4 km are attracting attention as new kind of geothermal resource. In order to effectively exploit the superhot geothermal resource through the creation of enhanced geothermal systems (superhot EGSs), hydraulic fracturing is a promising technique. Laboratory-scale hydraulic fracturing experiments of granite have recently demonstrated the formation of a dense network of permeable fractures throughout the entire rock body, referred to as a cloud-fracture network, at or near the supercritical temperature for water. Although the process has been presumed to involve continuous infiltration of low-viscosity water into preexisting microfractures followed by creation and merger of the subsequent fractures, a plausible criterion for cloud-fracture network formation is yet to be clarified. The applicability of the Griffith failure criterion is supported by hydraulic fracturing experiments with acoustic emission measurements of granite at 400 °C under true triaxial stress and at 450 °C under conventional triaxial stress. The present study provides, for the first time, a theoretical basis required to establish the procedure for hydraulic fracturing in the superhot EGS. | ||
| 650 | 4 | |a Hydraulic fracturing | |
| 650 | 4 | |a Supercritical geothermal energy | |
| 650 | 4 | |a Superhot geothermal energy | |
| 650 | 4 | |a Enhanced geothermal system | |
| 650 | 4 | |a Granite | |
| 700 | 1 | |a Watanabe, Noriaki |0 (orcid)0000-0002-3876-2794 |4 aut | |
| 700 | 1 | |a Sakaguchi, Kiyotoshi |0 (orcid)0000-0003-4048-601X |4 aut | |
| 700 | 1 | |a Miura, Takahiro |4 aut | |
| 700 | 1 | |a Chen, Youqing |0 (orcid)0000-0002-4555-0239 |4 aut | |
| 700 | 1 | |a Ishibashi, Takuya |0 (orcid)0000-0002-7998-0595 |4 aut | |
| 700 | 1 | |a Pramudyo, Eko |4 aut | |
| 700 | 1 | |a Parisio, Francesco |0 (orcid)0000-0002-1798-3993 |4 aut | |
| 700 | 1 | |a Yoshioka, Keita |0 (orcid)0000-0001-7518-6952 |4 aut | |
| 700 | 1 | |a Nakamura, Kengo |0 (orcid)0000-0002-2304-1548 |4 aut | |
| 700 | 1 | |a Komai, Takeshi |0 (orcid)0000-0003-2244-5177 |4 aut | |
| 700 | 1 | |a Tsuchiya, Noriyoshi |0 (orcid)0000-0001-8176-6849 |4 aut | |
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10.1007/s00603-021-02416-z doi (DE-627)OLC2126265250 (DE-He213)s00603-021-02416-z-p DE-627 ger DE-627 rakwb eng 690 VZ 16,13 19,1 ssgn Goto, Ryota verfasserin aut Creating Cloud-Fracture Network by Flow-induced Microfracturing in Superhot Geothermal Environments 2021 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © The Author(s), under exclusive licence to Springer-Verlag GmbH, AT part of Springer Nature 2021 Abstract Superhot geothermal environments with temperatures of approximately 400–500 °C at depths of approximately 2–4 km are attracting attention as new kind of geothermal resource. In order to effectively exploit the superhot geothermal resource through the creation of enhanced geothermal systems (superhot EGSs), hydraulic fracturing is a promising technique. Laboratory-scale hydraulic fracturing experiments of granite have recently demonstrated the formation of a dense network of permeable fractures throughout the entire rock body, referred to as a cloud-fracture network, at or near the supercritical temperature for water. Although the process has been presumed to involve continuous infiltration of low-viscosity water into preexisting microfractures followed by creation and merger of the subsequent fractures, a plausible criterion for cloud-fracture network formation is yet to be clarified. The applicability of the Griffith failure criterion is supported by hydraulic fracturing experiments with acoustic emission measurements of granite at 400 °C under true triaxial stress and at 450 °C under conventional triaxial stress. The present study provides, for the first time, a theoretical basis required to establish the procedure for hydraulic fracturing in the superhot EGS. Hydraulic fracturing Supercritical geothermal energy Superhot geothermal energy Enhanced geothermal system Granite Watanabe, Noriaki (orcid)0000-0002-3876-2794 aut Sakaguchi, Kiyotoshi (orcid)0000-0003-4048-601X aut Miura, Takahiro aut Chen, Youqing (orcid)0000-0002-4555-0239 aut Ishibashi, Takuya (orcid)0000-0002-7998-0595 aut Pramudyo, Eko aut Parisio, Francesco (orcid)0000-0002-1798-3993 aut Yoshioka, Keita (orcid)0000-0001-7518-6952 aut Nakamura, Kengo (orcid)0000-0002-2304-1548 aut Komai, Takeshi (orcid)0000-0003-2244-5177 aut Tsuchiya, Noriyoshi (orcid)0000-0001-8176-6849 aut Enthalten in Rock mechanics and rock engineering Springer Vienna, 1983 54(2021), 6 vom: 24. März, Seite 2959-2974 (DE-627)129620696 (DE-600)246075-0 (DE-576)015126897 0723-2632 nnns volume:54 year:2021 number:6 day:24 month:03 pages:2959-2974 https://doi.org/10.1007/s00603-021-02416-z lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-UMW SSG-OLC-ARC SSG-OLC-TEC SSG-OLC-GEO SSG-OPC-GGO SSG-OPC-GEO GBV_ILN_30 GBV_ILN_2004 AR 54 2021 6 24 03 2959-2974 |
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10.1007/s00603-021-02416-z doi (DE-627)OLC2126265250 (DE-He213)s00603-021-02416-z-p DE-627 ger DE-627 rakwb eng 690 VZ 16,13 19,1 ssgn Goto, Ryota verfasserin aut Creating Cloud-Fracture Network by Flow-induced Microfracturing in Superhot Geothermal Environments 2021 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © The Author(s), under exclusive licence to Springer-Verlag GmbH, AT part of Springer Nature 2021 Abstract Superhot geothermal environments with temperatures of approximately 400–500 °C at depths of approximately 2–4 km are attracting attention as new kind of geothermal resource. In order to effectively exploit the superhot geothermal resource through the creation of enhanced geothermal systems (superhot EGSs), hydraulic fracturing is a promising technique. Laboratory-scale hydraulic fracturing experiments of granite have recently demonstrated the formation of a dense network of permeable fractures throughout the entire rock body, referred to as a cloud-fracture network, at or near the supercritical temperature for water. Although the process has been presumed to involve continuous infiltration of low-viscosity water into preexisting microfractures followed by creation and merger of the subsequent fractures, a plausible criterion for cloud-fracture network formation is yet to be clarified. The applicability of the Griffith failure criterion is supported by hydraulic fracturing experiments with acoustic emission measurements of granite at 400 °C under true triaxial stress and at 450 °C under conventional triaxial stress. The present study provides, for the first time, a theoretical basis required to establish the procedure for hydraulic fracturing in the superhot EGS. Hydraulic fracturing Supercritical geothermal energy Superhot geothermal energy Enhanced geothermal system Granite Watanabe, Noriaki (orcid)0000-0002-3876-2794 aut Sakaguchi, Kiyotoshi (orcid)0000-0003-4048-601X aut Miura, Takahiro aut Chen, Youqing (orcid)0000-0002-4555-0239 aut Ishibashi, Takuya (orcid)0000-0002-7998-0595 aut Pramudyo, Eko aut Parisio, Francesco (orcid)0000-0002-1798-3993 aut Yoshioka, Keita (orcid)0000-0001-7518-6952 aut Nakamura, Kengo (orcid)0000-0002-2304-1548 aut Komai, Takeshi (orcid)0000-0003-2244-5177 aut Tsuchiya, Noriyoshi (orcid)0000-0001-8176-6849 aut Enthalten in Rock mechanics and rock engineering Springer Vienna, 1983 54(2021), 6 vom: 24. März, Seite 2959-2974 (DE-627)129620696 (DE-600)246075-0 (DE-576)015126897 0723-2632 nnns volume:54 year:2021 number:6 day:24 month:03 pages:2959-2974 https://doi.org/10.1007/s00603-021-02416-z lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-UMW SSG-OLC-ARC SSG-OLC-TEC SSG-OLC-GEO SSG-OPC-GGO SSG-OPC-GEO GBV_ILN_30 GBV_ILN_2004 AR 54 2021 6 24 03 2959-2974 |
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10.1007/s00603-021-02416-z doi (DE-627)OLC2126265250 (DE-He213)s00603-021-02416-z-p DE-627 ger DE-627 rakwb eng 690 VZ 16,13 19,1 ssgn Goto, Ryota verfasserin aut Creating Cloud-Fracture Network by Flow-induced Microfracturing in Superhot Geothermal Environments 2021 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © The Author(s), under exclusive licence to Springer-Verlag GmbH, AT part of Springer Nature 2021 Abstract Superhot geothermal environments with temperatures of approximately 400–500 °C at depths of approximately 2–4 km are attracting attention as new kind of geothermal resource. In order to effectively exploit the superhot geothermal resource through the creation of enhanced geothermal systems (superhot EGSs), hydraulic fracturing is a promising technique. Laboratory-scale hydraulic fracturing experiments of granite have recently demonstrated the formation of a dense network of permeable fractures throughout the entire rock body, referred to as a cloud-fracture network, at or near the supercritical temperature for water. Although the process has been presumed to involve continuous infiltration of low-viscosity water into preexisting microfractures followed by creation and merger of the subsequent fractures, a plausible criterion for cloud-fracture network formation is yet to be clarified. The applicability of the Griffith failure criterion is supported by hydraulic fracturing experiments with acoustic emission measurements of granite at 400 °C under true triaxial stress and at 450 °C under conventional triaxial stress. The present study provides, for the first time, a theoretical basis required to establish the procedure for hydraulic fracturing in the superhot EGS. Hydraulic fracturing Supercritical geothermal energy Superhot geothermal energy Enhanced geothermal system Granite Watanabe, Noriaki (orcid)0000-0002-3876-2794 aut Sakaguchi, Kiyotoshi (orcid)0000-0003-4048-601X aut Miura, Takahiro aut Chen, Youqing (orcid)0000-0002-4555-0239 aut Ishibashi, Takuya (orcid)0000-0002-7998-0595 aut Pramudyo, Eko aut Parisio, Francesco (orcid)0000-0002-1798-3993 aut Yoshioka, Keita (orcid)0000-0001-7518-6952 aut Nakamura, Kengo (orcid)0000-0002-2304-1548 aut Komai, Takeshi (orcid)0000-0003-2244-5177 aut Tsuchiya, Noriyoshi (orcid)0000-0001-8176-6849 aut Enthalten in Rock mechanics and rock engineering Springer Vienna, 1983 54(2021), 6 vom: 24. März, Seite 2959-2974 (DE-627)129620696 (DE-600)246075-0 (DE-576)015126897 0723-2632 nnns volume:54 year:2021 number:6 day:24 month:03 pages:2959-2974 https://doi.org/10.1007/s00603-021-02416-z lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-UMW SSG-OLC-ARC SSG-OLC-TEC SSG-OLC-GEO SSG-OPC-GGO SSG-OPC-GEO GBV_ILN_30 GBV_ILN_2004 AR 54 2021 6 24 03 2959-2974 |
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10.1007/s00603-021-02416-z doi (DE-627)OLC2126265250 (DE-He213)s00603-021-02416-z-p DE-627 ger DE-627 rakwb eng 690 VZ 16,13 19,1 ssgn Goto, Ryota verfasserin aut Creating Cloud-Fracture Network by Flow-induced Microfracturing in Superhot Geothermal Environments 2021 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © The Author(s), under exclusive licence to Springer-Verlag GmbH, AT part of Springer Nature 2021 Abstract Superhot geothermal environments with temperatures of approximately 400–500 °C at depths of approximately 2–4 km are attracting attention as new kind of geothermal resource. In order to effectively exploit the superhot geothermal resource through the creation of enhanced geothermal systems (superhot EGSs), hydraulic fracturing is a promising technique. Laboratory-scale hydraulic fracturing experiments of granite have recently demonstrated the formation of a dense network of permeable fractures throughout the entire rock body, referred to as a cloud-fracture network, at or near the supercritical temperature for water. Although the process has been presumed to involve continuous infiltration of low-viscosity water into preexisting microfractures followed by creation and merger of the subsequent fractures, a plausible criterion for cloud-fracture network formation is yet to be clarified. The applicability of the Griffith failure criterion is supported by hydraulic fracturing experiments with acoustic emission measurements of granite at 400 °C under true triaxial stress and at 450 °C under conventional triaxial stress. The present study provides, for the first time, a theoretical basis required to establish the procedure for hydraulic fracturing in the superhot EGS. Hydraulic fracturing Supercritical geothermal energy Superhot geothermal energy Enhanced geothermal system Granite Watanabe, Noriaki (orcid)0000-0002-3876-2794 aut Sakaguchi, Kiyotoshi (orcid)0000-0003-4048-601X aut Miura, Takahiro aut Chen, Youqing (orcid)0000-0002-4555-0239 aut Ishibashi, Takuya (orcid)0000-0002-7998-0595 aut Pramudyo, Eko aut Parisio, Francesco (orcid)0000-0002-1798-3993 aut Yoshioka, Keita (orcid)0000-0001-7518-6952 aut Nakamura, Kengo (orcid)0000-0002-2304-1548 aut Komai, Takeshi (orcid)0000-0003-2244-5177 aut Tsuchiya, Noriyoshi (orcid)0000-0001-8176-6849 aut Enthalten in Rock mechanics and rock engineering Springer Vienna, 1983 54(2021), 6 vom: 24. März, Seite 2959-2974 (DE-627)129620696 (DE-600)246075-0 (DE-576)015126897 0723-2632 nnns volume:54 year:2021 number:6 day:24 month:03 pages:2959-2974 https://doi.org/10.1007/s00603-021-02416-z lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-UMW SSG-OLC-ARC SSG-OLC-TEC SSG-OLC-GEO SSG-OPC-GGO SSG-OPC-GEO GBV_ILN_30 GBV_ILN_2004 AR 54 2021 6 24 03 2959-2974 |
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10.1007/s00603-021-02416-z doi (DE-627)OLC2126265250 (DE-He213)s00603-021-02416-z-p DE-627 ger DE-627 rakwb eng 690 VZ 16,13 19,1 ssgn Goto, Ryota verfasserin aut Creating Cloud-Fracture Network by Flow-induced Microfracturing in Superhot Geothermal Environments 2021 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © The Author(s), under exclusive licence to Springer-Verlag GmbH, AT part of Springer Nature 2021 Abstract Superhot geothermal environments with temperatures of approximately 400–500 °C at depths of approximately 2–4 km are attracting attention as new kind of geothermal resource. In order to effectively exploit the superhot geothermal resource through the creation of enhanced geothermal systems (superhot EGSs), hydraulic fracturing is a promising technique. Laboratory-scale hydraulic fracturing experiments of granite have recently demonstrated the formation of a dense network of permeable fractures throughout the entire rock body, referred to as a cloud-fracture network, at or near the supercritical temperature for water. Although the process has been presumed to involve continuous infiltration of low-viscosity water into preexisting microfractures followed by creation and merger of the subsequent fractures, a plausible criterion for cloud-fracture network formation is yet to be clarified. The applicability of the Griffith failure criterion is supported by hydraulic fracturing experiments with acoustic emission measurements of granite at 400 °C under true triaxial stress and at 450 °C under conventional triaxial stress. The present study provides, for the first time, a theoretical basis required to establish the procedure for hydraulic fracturing in the superhot EGS. Hydraulic fracturing Supercritical geothermal energy Superhot geothermal energy Enhanced geothermal system Granite Watanabe, Noriaki (orcid)0000-0002-3876-2794 aut Sakaguchi, Kiyotoshi (orcid)0000-0003-4048-601X aut Miura, Takahiro aut Chen, Youqing (orcid)0000-0002-4555-0239 aut Ishibashi, Takuya (orcid)0000-0002-7998-0595 aut Pramudyo, Eko aut Parisio, Francesco (orcid)0000-0002-1798-3993 aut Yoshioka, Keita (orcid)0000-0001-7518-6952 aut Nakamura, Kengo (orcid)0000-0002-2304-1548 aut Komai, Takeshi (orcid)0000-0003-2244-5177 aut Tsuchiya, Noriyoshi (orcid)0000-0001-8176-6849 aut Enthalten in Rock mechanics and rock engineering Springer Vienna, 1983 54(2021), 6 vom: 24. März, Seite 2959-2974 (DE-627)129620696 (DE-600)246075-0 (DE-576)015126897 0723-2632 nnns volume:54 year:2021 number:6 day:24 month:03 pages:2959-2974 https://doi.org/10.1007/s00603-021-02416-z lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-UMW SSG-OLC-ARC SSG-OLC-TEC SSG-OLC-GEO SSG-OPC-GGO SSG-OPC-GEO GBV_ILN_30 GBV_ILN_2004 AR 54 2021 6 24 03 2959-2974 |
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creating cloud-fracture network by flow-induced microfracturing in superhot geothermal environments |
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Creating Cloud-Fracture Network by Flow-induced Microfracturing in Superhot Geothermal Environments |
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Abstract Superhot geothermal environments with temperatures of approximately 400–500 °C at depths of approximately 2–4 km are attracting attention as new kind of geothermal resource. In order to effectively exploit the superhot geothermal resource through the creation of enhanced geothermal systems (superhot EGSs), hydraulic fracturing is a promising technique. Laboratory-scale hydraulic fracturing experiments of granite have recently demonstrated the formation of a dense network of permeable fractures throughout the entire rock body, referred to as a cloud-fracture network, at or near the supercritical temperature for water. Although the process has been presumed to involve continuous infiltration of low-viscosity water into preexisting microfractures followed by creation and merger of the subsequent fractures, a plausible criterion for cloud-fracture network formation is yet to be clarified. The applicability of the Griffith failure criterion is supported by hydraulic fracturing experiments with acoustic emission measurements of granite at 400 °C under true triaxial stress and at 450 °C under conventional triaxial stress. The present study provides, for the first time, a theoretical basis required to establish the procedure for hydraulic fracturing in the superhot EGS. © The Author(s), under exclusive licence to Springer-Verlag GmbH, AT part of Springer Nature 2021 |
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Abstract Superhot geothermal environments with temperatures of approximately 400–500 °C at depths of approximately 2–4 km are attracting attention as new kind of geothermal resource. In order to effectively exploit the superhot geothermal resource through the creation of enhanced geothermal systems (superhot EGSs), hydraulic fracturing is a promising technique. Laboratory-scale hydraulic fracturing experiments of granite have recently demonstrated the formation of a dense network of permeable fractures throughout the entire rock body, referred to as a cloud-fracture network, at or near the supercritical temperature for water. Although the process has been presumed to involve continuous infiltration of low-viscosity water into preexisting microfractures followed by creation and merger of the subsequent fractures, a plausible criterion for cloud-fracture network formation is yet to be clarified. The applicability of the Griffith failure criterion is supported by hydraulic fracturing experiments with acoustic emission measurements of granite at 400 °C under true triaxial stress and at 450 °C under conventional triaxial stress. The present study provides, for the first time, a theoretical basis required to establish the procedure for hydraulic fracturing in the superhot EGS. © The Author(s), under exclusive licence to Springer-Verlag GmbH, AT part of Springer Nature 2021 |
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Abstract Superhot geothermal environments with temperatures of approximately 400–500 °C at depths of approximately 2–4 km are attracting attention as new kind of geothermal resource. In order to effectively exploit the superhot geothermal resource through the creation of enhanced geothermal systems (superhot EGSs), hydraulic fracturing is a promising technique. Laboratory-scale hydraulic fracturing experiments of granite have recently demonstrated the formation of a dense network of permeable fractures throughout the entire rock body, referred to as a cloud-fracture network, at or near the supercritical temperature for water. Although the process has been presumed to involve continuous infiltration of low-viscosity water into preexisting microfractures followed by creation and merger of the subsequent fractures, a plausible criterion for cloud-fracture network formation is yet to be clarified. The applicability of the Griffith failure criterion is supported by hydraulic fracturing experiments with acoustic emission measurements of granite at 400 °C under true triaxial stress and at 450 °C under conventional triaxial stress. The present study provides, for the first time, a theoretical basis required to establish the procedure for hydraulic fracturing in the superhot EGS. © The Author(s), under exclusive licence to Springer-Verlag GmbH, AT part of Springer Nature 2021 |
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In order to effectively exploit the superhot geothermal resource through the creation of enhanced geothermal systems (superhot EGSs), hydraulic fracturing is a promising technique. Laboratory-scale hydraulic fracturing experiments of granite have recently demonstrated the formation of a dense network of permeable fractures throughout the entire rock body, referred to as a cloud-fracture network, at or near the supercritical temperature for water. Although the process has been presumed to involve continuous infiltration of low-viscosity water into preexisting microfractures followed by creation and merger of the subsequent fractures, a plausible criterion for cloud-fracture network formation is yet to be clarified. The applicability of the Griffith failure criterion is supported by hydraulic fracturing experiments with acoustic emission measurements of granite at 400 °C under true triaxial stress and at 450 °C under conventional triaxial stress. 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März, Seite 2959-2974</subfield><subfield code="w">(DE-627)129620696</subfield><subfield code="w">(DE-600)246075-0</subfield><subfield code="w">(DE-576)015126897</subfield><subfield code="x">0723-2632</subfield><subfield code="7">nnns</subfield></datafield><datafield tag="773" ind1="1" ind2="8"><subfield code="g">volume:54</subfield><subfield code="g">year:2021</subfield><subfield code="g">number:6</subfield><subfield code="g">day:24</subfield><subfield code="g">month:03</subfield><subfield code="g">pages:2959-2974</subfield></datafield><datafield tag="856" ind1="4" ind2="1"><subfield code="u">https://doi.org/10.1007/s00603-021-02416-z</subfield><subfield code="z">lizenzpflichtig</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_USEFLAG_A</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SYSFLAG_A</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_OLC</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SSG-OLC-UMW</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SSG-OLC-ARC</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SSG-OLC-TEC</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SSG-OLC-GEO</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SSG-OPC-GGO</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SSG-OPC-GEO</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_30</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ILN_2004</subfield></datafield><datafield tag="951" ind1=" " ind2=" "><subfield code="a">AR</subfield></datafield><datafield tag="952" ind1=" " ind2=" "><subfield code="d">54</subfield><subfield code="j">2021</subfield><subfield code="e">6</subfield><subfield code="b">24</subfield><subfield code="c">03</subfield><subfield code="h">2959-2974</subfield></datafield></record></collection>
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