Experimental studies on physical and mechanical behaviors of heated rocks with pre-fabricated hole exposed to different cooling rates
Abstract In enhanced geothermal systems, thermal shock occurs around the borehole when cold water is injected into the hot rock of a geothermal reservoir. Experiments were performed on granite and sandstone specimens to simulate and investigate the effects of temperature and cooling rate using five...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Li, Diyuan [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2022 |
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| Schlagwörter: |
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| Anmerkung: |
© The Author(s), under exclusive licence to Springer Nature Switzerland AG 2022 |
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| Übergeordnetes Werk: |
Enthalten in: Geomechanics and geophysics for geo-energy and geo-resources - New York, NY [u.a.] : Springer international, 2015, 8(2022), 4 vom: 11. Juli |
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| Übergeordnetes Werk: |
volume:8 ; year:2022 ; number:4 ; day:11 ; month:07 |
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| DOI / URN: |
10.1007/s40948-022-00427-w |
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SPR047557621 |
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| 520 | |a Abstract In enhanced geothermal systems, thermal shock occurs around the borehole when cold water is injected into the hot rock of a geothermal reservoir. Experiments were performed on granite and sandstone specimens to simulate and investigate the effects of temperature and cooling rate using five temperature gradients and two cooling methods. Scanning electron microscopy was applied to examine the microstructural changes after thermal treatment, and a series of uniaxial compress tests were conducted on rock specimens containing a simulated borehole. The digital image correlation (DIC) method was applied to analyze the crack evolution during loading. The test results show that the thermal damage induced by the propagation of both inter- and intra-granular cracks destroy the rock microstructural integrity, and that cold water breaks the bond between grains and further widens thermal-induced cracks. When the temperature increases from 20 to 800 °C, the physical and mechanical properties of the two investigated rock types are both weakened, including the density, P-wave velocity, and compression strength. Rapid water cooling more significantly affects the rock mechanical properties than slow cooling owing to the intense thermal shock. The presence of thermal-induced cracks at high temperature significantly influences the rock homogeneity and elastic modulus, and the quenched specimens showed less brittle characteristics at high temperature. The DIC analysis indicates that thermal-induced cracks alter the local stress concentration around the simulated borehole and increase the unstable crack propagation regions owing to stress redistribution. | ||
| 520 | |a Article highlights The evolution of thermal-induced micro-cracks at high temperature weakens the physical-mechanical properties of rocks.Greater damage is caused to quenched rocks by thermal shock and water weakening than slow cooling.The DIC technique is applied to study the deformation behavior around the borehole after temperature treatment. | ||
| 650 | 4 | |a Thermal damage |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a Physical properties |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a Mechanical properties |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a Rock mechanics |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a DIC technique |7 (dpeaa)DE-He213 | |
| 700 | 1 | |a Su, Xiaoli |4 aut | |
| 700 | 1 | |a Gao, Feihong |4 aut | |
| 700 | 1 | |a Liu, Zida |4 aut | |
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10.1007/s40948-022-00427-w doi (DE-627)SPR047557621 (SPR)s40948-022-00427-w-e DE-627 ger DE-627 rakwb eng Li, Diyuan verfasserin (orcid)0000-0002-0584-665X aut Experimental studies on physical and mechanical behaviors of heated rocks with pre-fabricated hole exposed to different cooling rates 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s), under exclusive licence to Springer Nature Switzerland AG 2022 Abstract In enhanced geothermal systems, thermal shock occurs around the borehole when cold water is injected into the hot rock of a geothermal reservoir. Experiments were performed on granite and sandstone specimens to simulate and investigate the effects of temperature and cooling rate using five temperature gradients and two cooling methods. Scanning electron microscopy was applied to examine the microstructural changes after thermal treatment, and a series of uniaxial compress tests were conducted on rock specimens containing a simulated borehole. The digital image correlation (DIC) method was applied to analyze the crack evolution during loading. The test results show that the thermal damage induced by the propagation of both inter- and intra-granular cracks destroy the rock microstructural integrity, and that cold water breaks the bond between grains and further widens thermal-induced cracks. When the temperature increases from 20 to 800 °C, the physical and mechanical properties of the two investigated rock types are both weakened, including the density, P-wave velocity, and compression strength. Rapid water cooling more significantly affects the rock mechanical properties than slow cooling owing to the intense thermal shock. The presence of thermal-induced cracks at high temperature significantly influences the rock homogeneity and elastic modulus, and the quenched specimens showed less brittle characteristics at high temperature. The DIC analysis indicates that thermal-induced cracks alter the local stress concentration around the simulated borehole and increase the unstable crack propagation regions owing to stress redistribution. Article highlights The evolution of thermal-induced micro-cracks at high temperature weakens the physical-mechanical properties of rocks.Greater damage is caused to quenched rocks by thermal shock and water weakening than slow cooling.The DIC technique is applied to study the deformation behavior around the borehole after temperature treatment. Thermal damage (dpeaa)DE-He213 Physical properties (dpeaa)DE-He213 Mechanical properties (dpeaa)DE-He213 Rock mechanics (dpeaa)DE-He213 DIC technique (dpeaa)DE-He213 Su, Xiaoli aut Gao, Feihong aut Liu, Zida aut Enthalten in Geomechanics and geophysics for geo-energy and geo-resources New York, NY [u.a.] : Springer international, 2015 8(2022), 4 vom: 11. Juli (DE-627)827603401 (DE-600)2823606-3 2363-8427 nnns volume:8 year:2022 number:4 day:11 month:07 https://dx.doi.org/10.1007/s40948-022-00427-w lizenzpflichtig 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_32 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_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 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_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 8 2022 4 11 07 |
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10.1007/s40948-022-00427-w doi (DE-627)SPR047557621 (SPR)s40948-022-00427-w-e DE-627 ger DE-627 rakwb eng Li, Diyuan verfasserin (orcid)0000-0002-0584-665X aut Experimental studies on physical and mechanical behaviors of heated rocks with pre-fabricated hole exposed to different cooling rates 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s), under exclusive licence to Springer Nature Switzerland AG 2022 Abstract In enhanced geothermal systems, thermal shock occurs around the borehole when cold water is injected into the hot rock of a geothermal reservoir. Experiments were performed on granite and sandstone specimens to simulate and investigate the effects of temperature and cooling rate using five temperature gradients and two cooling methods. Scanning electron microscopy was applied to examine the microstructural changes after thermal treatment, and a series of uniaxial compress tests were conducted on rock specimens containing a simulated borehole. The digital image correlation (DIC) method was applied to analyze the crack evolution during loading. The test results show that the thermal damage induced by the propagation of both inter- and intra-granular cracks destroy the rock microstructural integrity, and that cold water breaks the bond between grains and further widens thermal-induced cracks. When the temperature increases from 20 to 800 °C, the physical and mechanical properties of the two investigated rock types are both weakened, including the density, P-wave velocity, and compression strength. Rapid water cooling more significantly affects the rock mechanical properties than slow cooling owing to the intense thermal shock. The presence of thermal-induced cracks at high temperature significantly influences the rock homogeneity and elastic modulus, and the quenched specimens showed less brittle characteristics at high temperature. The DIC analysis indicates that thermal-induced cracks alter the local stress concentration around the simulated borehole and increase the unstable crack propagation regions owing to stress redistribution. Article highlights The evolution of thermal-induced micro-cracks at high temperature weakens the physical-mechanical properties of rocks.Greater damage is caused to quenched rocks by thermal shock and water weakening than slow cooling.The DIC technique is applied to study the deformation behavior around the borehole after temperature treatment. Thermal damage (dpeaa)DE-He213 Physical properties (dpeaa)DE-He213 Mechanical properties (dpeaa)DE-He213 Rock mechanics (dpeaa)DE-He213 DIC technique (dpeaa)DE-He213 Su, Xiaoli aut Gao, Feihong aut Liu, Zida aut Enthalten in Geomechanics and geophysics for geo-energy and geo-resources New York, NY [u.a.] : Springer international, 2015 8(2022), 4 vom: 11. Juli (DE-627)827603401 (DE-600)2823606-3 2363-8427 nnns volume:8 year:2022 number:4 day:11 month:07 https://dx.doi.org/10.1007/s40948-022-00427-w lizenzpflichtig 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_32 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_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 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_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 8 2022 4 11 07 |
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10.1007/s40948-022-00427-w doi (DE-627)SPR047557621 (SPR)s40948-022-00427-w-e DE-627 ger DE-627 rakwb eng Li, Diyuan verfasserin (orcid)0000-0002-0584-665X aut Experimental studies on physical and mechanical behaviors of heated rocks with pre-fabricated hole exposed to different cooling rates 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s), under exclusive licence to Springer Nature Switzerland AG 2022 Abstract In enhanced geothermal systems, thermal shock occurs around the borehole when cold water is injected into the hot rock of a geothermal reservoir. Experiments were performed on granite and sandstone specimens to simulate and investigate the effects of temperature and cooling rate using five temperature gradients and two cooling methods. Scanning electron microscopy was applied to examine the microstructural changes after thermal treatment, and a series of uniaxial compress tests were conducted on rock specimens containing a simulated borehole. The digital image correlation (DIC) method was applied to analyze the crack evolution during loading. The test results show that the thermal damage induced by the propagation of both inter- and intra-granular cracks destroy the rock microstructural integrity, and that cold water breaks the bond between grains and further widens thermal-induced cracks. When the temperature increases from 20 to 800 °C, the physical and mechanical properties of the two investigated rock types are both weakened, including the density, P-wave velocity, and compression strength. Rapid water cooling more significantly affects the rock mechanical properties than slow cooling owing to the intense thermal shock. The presence of thermal-induced cracks at high temperature significantly influences the rock homogeneity and elastic modulus, and the quenched specimens showed less brittle characteristics at high temperature. The DIC analysis indicates that thermal-induced cracks alter the local stress concentration around the simulated borehole and increase the unstable crack propagation regions owing to stress redistribution. Article highlights The evolution of thermal-induced micro-cracks at high temperature weakens the physical-mechanical properties of rocks.Greater damage is caused to quenched rocks by thermal shock and water weakening than slow cooling.The DIC technique is applied to study the deformation behavior around the borehole after temperature treatment. Thermal damage (dpeaa)DE-He213 Physical properties (dpeaa)DE-He213 Mechanical properties (dpeaa)DE-He213 Rock mechanics (dpeaa)DE-He213 DIC technique (dpeaa)DE-He213 Su, Xiaoli aut Gao, Feihong aut Liu, Zida aut Enthalten in Geomechanics and geophysics for geo-energy and geo-resources New York, NY [u.a.] : Springer international, 2015 8(2022), 4 vom: 11. Juli (DE-627)827603401 (DE-600)2823606-3 2363-8427 nnns volume:8 year:2022 number:4 day:11 month:07 https://dx.doi.org/10.1007/s40948-022-00427-w lizenzpflichtig 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_32 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_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 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_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 8 2022 4 11 07 |
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10.1007/s40948-022-00427-w doi (DE-627)SPR047557621 (SPR)s40948-022-00427-w-e DE-627 ger DE-627 rakwb eng Li, Diyuan verfasserin (orcid)0000-0002-0584-665X aut Experimental studies on physical and mechanical behaviors of heated rocks with pre-fabricated hole exposed to different cooling rates 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s), under exclusive licence to Springer Nature Switzerland AG 2022 Abstract In enhanced geothermal systems, thermal shock occurs around the borehole when cold water is injected into the hot rock of a geothermal reservoir. Experiments were performed on granite and sandstone specimens to simulate and investigate the effects of temperature and cooling rate using five temperature gradients and two cooling methods. Scanning electron microscopy was applied to examine the microstructural changes after thermal treatment, and a series of uniaxial compress tests were conducted on rock specimens containing a simulated borehole. The digital image correlation (DIC) method was applied to analyze the crack evolution during loading. The test results show that the thermal damage induced by the propagation of both inter- and intra-granular cracks destroy the rock microstructural integrity, and that cold water breaks the bond between grains and further widens thermal-induced cracks. When the temperature increases from 20 to 800 °C, the physical and mechanical properties of the two investigated rock types are both weakened, including the density, P-wave velocity, and compression strength. Rapid water cooling more significantly affects the rock mechanical properties than slow cooling owing to the intense thermal shock. The presence of thermal-induced cracks at high temperature significantly influences the rock homogeneity and elastic modulus, and the quenched specimens showed less brittle characteristics at high temperature. The DIC analysis indicates that thermal-induced cracks alter the local stress concentration around the simulated borehole and increase the unstable crack propagation regions owing to stress redistribution. Article highlights The evolution of thermal-induced micro-cracks at high temperature weakens the physical-mechanical properties of rocks.Greater damage is caused to quenched rocks by thermal shock and water weakening than slow cooling.The DIC technique is applied to study the deformation behavior around the borehole after temperature treatment. Thermal damage (dpeaa)DE-He213 Physical properties (dpeaa)DE-He213 Mechanical properties (dpeaa)DE-He213 Rock mechanics (dpeaa)DE-He213 DIC technique (dpeaa)DE-He213 Su, Xiaoli aut Gao, Feihong aut Liu, Zida aut Enthalten in Geomechanics and geophysics for geo-energy and geo-resources New York, NY [u.a.] : Springer international, 2015 8(2022), 4 vom: 11. Juli (DE-627)827603401 (DE-600)2823606-3 2363-8427 nnns volume:8 year:2022 number:4 day:11 month:07 https://dx.doi.org/10.1007/s40948-022-00427-w lizenzpflichtig 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_32 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_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 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_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 8 2022 4 11 07 |
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10.1007/s40948-022-00427-w doi (DE-627)SPR047557621 (SPR)s40948-022-00427-w-e DE-627 ger DE-627 rakwb eng Li, Diyuan verfasserin (orcid)0000-0002-0584-665X aut Experimental studies on physical and mechanical behaviors of heated rocks with pre-fabricated hole exposed to different cooling rates 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s), under exclusive licence to Springer Nature Switzerland AG 2022 Abstract In enhanced geothermal systems, thermal shock occurs around the borehole when cold water is injected into the hot rock of a geothermal reservoir. Experiments were performed on granite and sandstone specimens to simulate and investigate the effects of temperature and cooling rate using five temperature gradients and two cooling methods. Scanning electron microscopy was applied to examine the microstructural changes after thermal treatment, and a series of uniaxial compress tests were conducted on rock specimens containing a simulated borehole. The digital image correlation (DIC) method was applied to analyze the crack evolution during loading. The test results show that the thermal damage induced by the propagation of both inter- and intra-granular cracks destroy the rock microstructural integrity, and that cold water breaks the bond between grains and further widens thermal-induced cracks. When the temperature increases from 20 to 800 °C, the physical and mechanical properties of the two investigated rock types are both weakened, including the density, P-wave velocity, and compression strength. Rapid water cooling more significantly affects the rock mechanical properties than slow cooling owing to the intense thermal shock. The presence of thermal-induced cracks at high temperature significantly influences the rock homogeneity and elastic modulus, and the quenched specimens showed less brittle characteristics at high temperature. The DIC analysis indicates that thermal-induced cracks alter the local stress concentration around the simulated borehole and increase the unstable crack propagation regions owing to stress redistribution. Article highlights The evolution of thermal-induced micro-cracks at high temperature weakens the physical-mechanical properties of rocks.Greater damage is caused to quenched rocks by thermal shock and water weakening than slow cooling.The DIC technique is applied to study the deformation behavior around the borehole after temperature treatment. Thermal damage (dpeaa)DE-He213 Physical properties (dpeaa)DE-He213 Mechanical properties (dpeaa)DE-He213 Rock mechanics (dpeaa)DE-He213 DIC technique (dpeaa)DE-He213 Su, Xiaoli aut Gao, Feihong aut Liu, Zida aut Enthalten in Geomechanics and geophysics for geo-energy and geo-resources New York, NY [u.a.] : Springer international, 2015 8(2022), 4 vom: 11. Juli (DE-627)827603401 (DE-600)2823606-3 2363-8427 nnns volume:8 year:2022 number:4 day:11 month:07 https://dx.doi.org/10.1007/s40948-022-00427-w lizenzpflichtig 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_32 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_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 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_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 8 2022 4 11 07 |
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Experiments were performed on granite and sandstone specimens to simulate and investigate the effects of temperature and cooling rate using five temperature gradients and two cooling methods. Scanning electron microscopy was applied to examine the microstructural changes after thermal treatment, and a series of uniaxial compress tests were conducted on rock specimens containing a simulated borehole. The digital image correlation (DIC) method was applied to analyze the crack evolution during loading. The test results show that the thermal damage induced by the propagation of both inter- and intra-granular cracks destroy the rock microstructural integrity, and that cold water breaks the bond between grains and further widens thermal-induced cracks. When the temperature increases from 20 to 800 °C, the physical and mechanical properties of the two investigated rock types are both weakened, including the density, P-wave velocity, and compression strength. Rapid water cooling more significantly affects the rock mechanical properties than slow cooling owing to the intense thermal shock. The presence of thermal-induced cracks at high temperature significantly influences the rock homogeneity and elastic modulus, and the quenched specimens showed less brittle characteristics at high temperature. The DIC analysis indicates that thermal-induced cracks alter the local stress concentration around the simulated borehole and increase the unstable crack propagation regions owing to stress redistribution.</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">Article highlights The evolution of thermal-induced micro-cracks at high temperature weakens the physical-mechanical properties of rocks.Greater damage is caused to quenched rocks by thermal shock and water weakening than slow cooling.The DIC technique is applied to study the deformation behavior around the borehole after temperature treatment.</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Thermal damage</subfield><subfield code="7">(dpeaa)DE-He213</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Physical properties</subfield><subfield code="7">(dpeaa)DE-He213</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Mechanical properties</subfield><subfield code="7">(dpeaa)DE-He213</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Rock mechanics</subfield><subfield code="7">(dpeaa)DE-He213</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">DIC technique</subfield><subfield code="7">(dpeaa)DE-He213</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Su, Xiaoli</subfield><subfield code="4">aut</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Gao, Feihong</subfield><subfield code="4">aut</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Liu, Zida</subfield><subfield code="4">aut</subfield></datafield><datafield tag="773" ind1="0" ind2="8"><subfield code="i">Enthalten in</subfield><subfield code="t">Geomechanics and geophysics for geo-energy and geo-resources</subfield><subfield code="d">New York, NY [u.a.] : Springer international, 2015</subfield><subfield code="g">8(2022), 4 vom: 11. 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Li, Diyuan |
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Li, Diyuan misc Thermal damage misc Physical properties misc Mechanical properties misc Rock mechanics misc DIC technique Experimental studies on physical and mechanical behaviors of heated rocks with pre-fabricated hole exposed to different cooling rates |
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Experimental studies on physical and mechanical behaviors of heated rocks with pre-fabricated hole exposed to different cooling rates Thermal damage (dpeaa)DE-He213 Physical properties (dpeaa)DE-He213 Mechanical properties (dpeaa)DE-He213 Rock mechanics (dpeaa)DE-He213 DIC technique (dpeaa)DE-He213 |
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Experimental studies on physical and mechanical behaviors of heated rocks with pre-fabricated hole exposed to different cooling rates |
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Geomechanics and geophysics for geo-energy and geo-resources |
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experimental studies on physical and mechanical behaviors of heated rocks with pre-fabricated hole exposed to different cooling rates |
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Experimental studies on physical and mechanical behaviors of heated rocks with pre-fabricated hole exposed to different cooling rates |
| abstract |
Abstract In enhanced geothermal systems, thermal shock occurs around the borehole when cold water is injected into the hot rock of a geothermal reservoir. Experiments were performed on granite and sandstone specimens to simulate and investigate the effects of temperature and cooling rate using five temperature gradients and two cooling methods. Scanning electron microscopy was applied to examine the microstructural changes after thermal treatment, and a series of uniaxial compress tests were conducted on rock specimens containing a simulated borehole. The digital image correlation (DIC) method was applied to analyze the crack evolution during loading. The test results show that the thermal damage induced by the propagation of both inter- and intra-granular cracks destroy the rock microstructural integrity, and that cold water breaks the bond between grains and further widens thermal-induced cracks. When the temperature increases from 20 to 800 °C, the physical and mechanical properties of the two investigated rock types are both weakened, including the density, P-wave velocity, and compression strength. Rapid water cooling more significantly affects the rock mechanical properties than slow cooling owing to the intense thermal shock. The presence of thermal-induced cracks at high temperature significantly influences the rock homogeneity and elastic modulus, and the quenched specimens showed less brittle characteristics at high temperature. The DIC analysis indicates that thermal-induced cracks alter the local stress concentration around the simulated borehole and increase the unstable crack propagation regions owing to stress redistribution. Article highlights The evolution of thermal-induced micro-cracks at high temperature weakens the physical-mechanical properties of rocks.Greater damage is caused to quenched rocks by thermal shock and water weakening than slow cooling.The DIC technique is applied to study the deformation behavior around the borehole after temperature treatment. © The Author(s), under exclusive licence to Springer Nature Switzerland AG 2022 |
| abstractGer |
Abstract In enhanced geothermal systems, thermal shock occurs around the borehole when cold water is injected into the hot rock of a geothermal reservoir. Experiments were performed on granite and sandstone specimens to simulate and investigate the effects of temperature and cooling rate using five temperature gradients and two cooling methods. Scanning electron microscopy was applied to examine the microstructural changes after thermal treatment, and a series of uniaxial compress tests were conducted on rock specimens containing a simulated borehole. The digital image correlation (DIC) method was applied to analyze the crack evolution during loading. The test results show that the thermal damage induced by the propagation of both inter- and intra-granular cracks destroy the rock microstructural integrity, and that cold water breaks the bond between grains and further widens thermal-induced cracks. When the temperature increases from 20 to 800 °C, the physical and mechanical properties of the two investigated rock types are both weakened, including the density, P-wave velocity, and compression strength. Rapid water cooling more significantly affects the rock mechanical properties than slow cooling owing to the intense thermal shock. The presence of thermal-induced cracks at high temperature significantly influences the rock homogeneity and elastic modulus, and the quenched specimens showed less brittle characteristics at high temperature. The DIC analysis indicates that thermal-induced cracks alter the local stress concentration around the simulated borehole and increase the unstable crack propagation regions owing to stress redistribution. Article highlights The evolution of thermal-induced micro-cracks at high temperature weakens the physical-mechanical properties of rocks.Greater damage is caused to quenched rocks by thermal shock and water weakening than slow cooling.The DIC technique is applied to study the deformation behavior around the borehole after temperature treatment. © The Author(s), under exclusive licence to Springer Nature Switzerland AG 2022 |
| abstract_unstemmed |
Abstract In enhanced geothermal systems, thermal shock occurs around the borehole when cold water is injected into the hot rock of a geothermal reservoir. Experiments were performed on granite and sandstone specimens to simulate and investigate the effects of temperature and cooling rate using five temperature gradients and two cooling methods. Scanning electron microscopy was applied to examine the microstructural changes after thermal treatment, and a series of uniaxial compress tests were conducted on rock specimens containing a simulated borehole. The digital image correlation (DIC) method was applied to analyze the crack evolution during loading. The test results show that the thermal damage induced by the propagation of both inter- and intra-granular cracks destroy the rock microstructural integrity, and that cold water breaks the bond between grains and further widens thermal-induced cracks. When the temperature increases from 20 to 800 °C, the physical and mechanical properties of the two investigated rock types are both weakened, including the density, P-wave velocity, and compression strength. Rapid water cooling more significantly affects the rock mechanical properties than slow cooling owing to the intense thermal shock. The presence of thermal-induced cracks at high temperature significantly influences the rock homogeneity and elastic modulus, and the quenched specimens showed less brittle characteristics at high temperature. The DIC analysis indicates that thermal-induced cracks alter the local stress concentration around the simulated borehole and increase the unstable crack propagation regions owing to stress redistribution. Article highlights The evolution of thermal-induced micro-cracks at high temperature weakens the physical-mechanical properties of rocks.Greater damage is caused to quenched rocks by thermal shock and water weakening than slow cooling.The DIC technique is applied to study the deformation behavior around the borehole after temperature treatment. © The Author(s), under exclusive licence to Springer Nature Switzerland AG 2022 |
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Experimental studies on physical and mechanical behaviors of heated rocks with pre-fabricated hole exposed to different cooling rates |
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Su, Xiaoli Gao, Feihong Liu, Zida |
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10.1007/s40948-022-00427-w |
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| score |
7.3987494 |