Numerical modelling of hydraulic fracture propagation in poro-viscoelastic formation
Modelling of hydraulic fracturing often deals with elastic deformation of rocks and fractures. Some rocks, such as the rock-salt and shale, however, displayed viscoelastic behaviour in both field investigation and lab creep tests. This time-dependent deformation poses a challenge in modelling and ch...
Ausführliche Beschreibung
Autor*in: |
Song, Huifang [verfasserIn] |
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E-Artikel |
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Sprache: |
Englisch |
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2021transfer abstract |
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Übergeordnetes Werk: |
Enthalten in: Iterated Gilbert mosaics - Baccelli, Francois ELSEVIER, 2019, Amsterdam [u.a.] |
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Übergeordnetes Werk: |
volume:196 ; year:2021 ; pages:0 |
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DOI / URN: |
10.1016/j.petrol.2020.107640 |
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ELV052478688 |
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520 | |a Modelling of hydraulic fracturing often deals with elastic deformation of rocks and fractures. Some rocks, such as the rock-salt and shale, however, displayed viscoelastic behaviour in both field investigation and lab creep tests. This time-dependent deformation poses a challenge in modelling and characterising of fracture propagation in such formations, thus adding complexity in a multi-physics scenario. In this paper, we intend to numerically model fracture propagation in viscoelastic formation and investigate the effect of creep on crack propagation and crack geometry. To incorporate pore pressure effect, we couple fluid diffusion with shale matrix viscoelasticity in the hydraulic fracturing propagation model. Therefore, a procedure for numerical modelling hydraulically-driven fracture propagation in poro-viscoelastic formation is developed. The method uses a poro-viscoelasticity theory to describe the fluid diffusion and matrix creep in solid skeleton, in conjunction with cohesive law based damage criteria to simulate crack growth and fluid flow in the crack. The modelling took shale as the representative sample. The viscoelastic properties were obtained via creep tests of shale samples from Roseneath formation, Cooper Basin, Australia. Results show that the hydraulically induced fracture tends to be wider and longer in creep formation. What's more, the propagation pressure is also lower than that in poroelastic formation. Fluid diffusion from crack to the matrix is more efficient due to modulus decay. For mixed-mode fracturing, the creep of the formation facilitates the process of reorientation with higher fracture propagation speed between kink points. | ||
520 | |a Modelling of hydraulic fracturing often deals with elastic deformation of rocks and fractures. Some rocks, such as the rock-salt and shale, however, displayed viscoelastic behaviour in both field investigation and lab creep tests. This time-dependent deformation poses a challenge in modelling and characterising of fracture propagation in such formations, thus adding complexity in a multi-physics scenario. In this paper, we intend to numerically model fracture propagation in viscoelastic formation and investigate the effect of creep on crack propagation and crack geometry. To incorporate pore pressure effect, we couple fluid diffusion with shale matrix viscoelasticity in the hydraulic fracturing propagation model. Therefore, a procedure for numerical modelling hydraulically-driven fracture propagation in poro-viscoelastic formation is developed. The method uses a poro-viscoelasticity theory to describe the fluid diffusion and matrix creep in solid skeleton, in conjunction with cohesive law based damage criteria to simulate crack growth and fluid flow in the crack. The modelling took shale as the representative sample. The viscoelastic properties were obtained via creep tests of shale samples from Roseneath formation, Cooper Basin, Australia. Results show that the hydraulically induced fracture tends to be wider and longer in creep formation. What's more, the propagation pressure is also lower than that in poroelastic formation. Fluid diffusion from crack to the matrix is more efficient due to modulus decay. For mixed-mode fracturing, the creep of the formation facilitates the process of reorientation with higher fracture propagation speed between kink points. | ||
650 | 7 | |a Poro-viscoelasticity |2 Elsevier | |
650 | 7 | |a Creep |2 Elsevier | |
650 | 7 | |a Numerical simulation |2 Elsevier | |
650 | 7 | |a Hydraulic fracturing |2 Elsevier | |
650 | 7 | |a Time-dependent deformation |2 Elsevier | |
700 | 1 | |a Liang, Zhirong |4 oth | |
700 | 1 | |a Chen, Zhixi |4 oth | |
700 | 1 | |a Rahman, Sheikh S. |4 oth | |
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10.1016/j.petrol.2020.107640 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001279.pica (DE-627)ELV052478688 (ELSEVIER)S0920-4105(20)30707-5 DE-627 ger DE-627 rakwb eng 510 VZ 31.70 bkl Song, Huifang verfasserin aut Numerical modelling of hydraulic fracture propagation in poro-viscoelastic formation 2021transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Modelling of hydraulic fracturing often deals with elastic deformation of rocks and fractures. Some rocks, such as the rock-salt and shale, however, displayed viscoelastic behaviour in both field investigation and lab creep tests. This time-dependent deformation poses a challenge in modelling and characterising of fracture propagation in such formations, thus adding complexity in a multi-physics scenario. In this paper, we intend to numerically model fracture propagation in viscoelastic formation and investigate the effect of creep on crack propagation and crack geometry. To incorporate pore pressure effect, we couple fluid diffusion with shale matrix viscoelasticity in the hydraulic fracturing propagation model. Therefore, a procedure for numerical modelling hydraulically-driven fracture propagation in poro-viscoelastic formation is developed. The method uses a poro-viscoelasticity theory to describe the fluid diffusion and matrix creep in solid skeleton, in conjunction with cohesive law based damage criteria to simulate crack growth and fluid flow in the crack. The modelling took shale as the representative sample. The viscoelastic properties were obtained via creep tests of shale samples from Roseneath formation, Cooper Basin, Australia. Results show that the hydraulically induced fracture tends to be wider and longer in creep formation. What's more, the propagation pressure is also lower than that in poroelastic formation. Fluid diffusion from crack to the matrix is more efficient due to modulus decay. For mixed-mode fracturing, the creep of the formation facilitates the process of reorientation with higher fracture propagation speed between kink points. Modelling of hydraulic fracturing often deals with elastic deformation of rocks and fractures. Some rocks, such as the rock-salt and shale, however, displayed viscoelastic behaviour in both field investigation and lab creep tests. This time-dependent deformation poses a challenge in modelling and characterising of fracture propagation in such formations, thus adding complexity in a multi-physics scenario. In this paper, we intend to numerically model fracture propagation in viscoelastic formation and investigate the effect of creep on crack propagation and crack geometry. To incorporate pore pressure effect, we couple fluid diffusion with shale matrix viscoelasticity in the hydraulic fracturing propagation model. Therefore, a procedure for numerical modelling hydraulically-driven fracture propagation in poro-viscoelastic formation is developed. The method uses a poro-viscoelasticity theory to describe the fluid diffusion and matrix creep in solid skeleton, in conjunction with cohesive law based damage criteria to simulate crack growth and fluid flow in the crack. The modelling took shale as the representative sample. The viscoelastic properties were obtained via creep tests of shale samples from Roseneath formation, Cooper Basin, Australia. Results show that the hydraulically induced fracture tends to be wider and longer in creep formation. What's more, the propagation pressure is also lower than that in poroelastic formation. Fluid diffusion from crack to the matrix is more efficient due to modulus decay. For mixed-mode fracturing, the creep of the formation facilitates the process of reorientation with higher fracture propagation speed between kink points. Poro-viscoelasticity Elsevier Creep Elsevier Numerical simulation Elsevier Hydraulic fracturing Elsevier Time-dependent deformation Elsevier Liang, Zhirong oth Chen, Zhixi oth Rahman, Sheikh S. oth Enthalten in Elsevier Science Baccelli, Francois ELSEVIER Iterated Gilbert mosaics 2019 Amsterdam [u.a.] (DE-627)ELV008094314 volume:196 year:2021 pages:0 https://doi.org/10.1016/j.petrol.2020.107640 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OPC-MAT 31.70 Wahrscheinlichkeitsrechnung VZ AR 196 2021 0 |
spelling |
10.1016/j.petrol.2020.107640 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001279.pica (DE-627)ELV052478688 (ELSEVIER)S0920-4105(20)30707-5 DE-627 ger DE-627 rakwb eng 510 VZ 31.70 bkl Song, Huifang verfasserin aut Numerical modelling of hydraulic fracture propagation in poro-viscoelastic formation 2021transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Modelling of hydraulic fracturing often deals with elastic deformation of rocks and fractures. Some rocks, such as the rock-salt and shale, however, displayed viscoelastic behaviour in both field investigation and lab creep tests. This time-dependent deformation poses a challenge in modelling and characterising of fracture propagation in such formations, thus adding complexity in a multi-physics scenario. In this paper, we intend to numerically model fracture propagation in viscoelastic formation and investigate the effect of creep on crack propagation and crack geometry. To incorporate pore pressure effect, we couple fluid diffusion with shale matrix viscoelasticity in the hydraulic fracturing propagation model. Therefore, a procedure for numerical modelling hydraulically-driven fracture propagation in poro-viscoelastic formation is developed. The method uses a poro-viscoelasticity theory to describe the fluid diffusion and matrix creep in solid skeleton, in conjunction with cohesive law based damage criteria to simulate crack growth and fluid flow in the crack. The modelling took shale as the representative sample. The viscoelastic properties were obtained via creep tests of shale samples from Roseneath formation, Cooper Basin, Australia. Results show that the hydraulically induced fracture tends to be wider and longer in creep formation. What's more, the propagation pressure is also lower than that in poroelastic formation. Fluid diffusion from crack to the matrix is more efficient due to modulus decay. For mixed-mode fracturing, the creep of the formation facilitates the process of reorientation with higher fracture propagation speed between kink points. Modelling of hydraulic fracturing often deals with elastic deformation of rocks and fractures. Some rocks, such as the rock-salt and shale, however, displayed viscoelastic behaviour in both field investigation and lab creep tests. This time-dependent deformation poses a challenge in modelling and characterising of fracture propagation in such formations, thus adding complexity in a multi-physics scenario. In this paper, we intend to numerically model fracture propagation in viscoelastic formation and investigate the effect of creep on crack propagation and crack geometry. To incorporate pore pressure effect, we couple fluid diffusion with shale matrix viscoelasticity in the hydraulic fracturing propagation model. Therefore, a procedure for numerical modelling hydraulically-driven fracture propagation in poro-viscoelastic formation is developed. The method uses a poro-viscoelasticity theory to describe the fluid diffusion and matrix creep in solid skeleton, in conjunction with cohesive law based damage criteria to simulate crack growth and fluid flow in the crack. The modelling took shale as the representative sample. The viscoelastic properties were obtained via creep tests of shale samples from Roseneath formation, Cooper Basin, Australia. Results show that the hydraulically induced fracture tends to be wider and longer in creep formation. What's more, the propagation pressure is also lower than that in poroelastic formation. Fluid diffusion from crack to the matrix is more efficient due to modulus decay. For mixed-mode fracturing, the creep of the formation facilitates the process of reorientation with higher fracture propagation speed between kink points. Poro-viscoelasticity Elsevier Creep Elsevier Numerical simulation Elsevier Hydraulic fracturing Elsevier Time-dependent deformation Elsevier Liang, Zhirong oth Chen, Zhixi oth Rahman, Sheikh S. oth Enthalten in Elsevier Science Baccelli, Francois ELSEVIER Iterated Gilbert mosaics 2019 Amsterdam [u.a.] (DE-627)ELV008094314 volume:196 year:2021 pages:0 https://doi.org/10.1016/j.petrol.2020.107640 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OPC-MAT 31.70 Wahrscheinlichkeitsrechnung VZ AR 196 2021 0 |
allfields_unstemmed |
10.1016/j.petrol.2020.107640 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001279.pica (DE-627)ELV052478688 (ELSEVIER)S0920-4105(20)30707-5 DE-627 ger DE-627 rakwb eng 510 VZ 31.70 bkl Song, Huifang verfasserin aut Numerical modelling of hydraulic fracture propagation in poro-viscoelastic formation 2021transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Modelling of hydraulic fracturing often deals with elastic deformation of rocks and fractures. Some rocks, such as the rock-salt and shale, however, displayed viscoelastic behaviour in both field investigation and lab creep tests. This time-dependent deformation poses a challenge in modelling and characterising of fracture propagation in such formations, thus adding complexity in a multi-physics scenario. In this paper, we intend to numerically model fracture propagation in viscoelastic formation and investigate the effect of creep on crack propagation and crack geometry. To incorporate pore pressure effect, we couple fluid diffusion with shale matrix viscoelasticity in the hydraulic fracturing propagation model. Therefore, a procedure for numerical modelling hydraulically-driven fracture propagation in poro-viscoelastic formation is developed. The method uses a poro-viscoelasticity theory to describe the fluid diffusion and matrix creep in solid skeleton, in conjunction with cohesive law based damage criteria to simulate crack growth and fluid flow in the crack. The modelling took shale as the representative sample. The viscoelastic properties were obtained via creep tests of shale samples from Roseneath formation, Cooper Basin, Australia. Results show that the hydraulically induced fracture tends to be wider and longer in creep formation. What's more, the propagation pressure is also lower than that in poroelastic formation. Fluid diffusion from crack to the matrix is more efficient due to modulus decay. For mixed-mode fracturing, the creep of the formation facilitates the process of reorientation with higher fracture propagation speed between kink points. Modelling of hydraulic fracturing often deals with elastic deformation of rocks and fractures. Some rocks, such as the rock-salt and shale, however, displayed viscoelastic behaviour in both field investigation and lab creep tests. This time-dependent deformation poses a challenge in modelling and characterising of fracture propagation in such formations, thus adding complexity in a multi-physics scenario. In this paper, we intend to numerically model fracture propagation in viscoelastic formation and investigate the effect of creep on crack propagation and crack geometry. To incorporate pore pressure effect, we couple fluid diffusion with shale matrix viscoelasticity in the hydraulic fracturing propagation model. Therefore, a procedure for numerical modelling hydraulically-driven fracture propagation in poro-viscoelastic formation is developed. The method uses a poro-viscoelasticity theory to describe the fluid diffusion and matrix creep in solid skeleton, in conjunction with cohesive law based damage criteria to simulate crack growth and fluid flow in the crack. The modelling took shale as the representative sample. The viscoelastic properties were obtained via creep tests of shale samples from Roseneath formation, Cooper Basin, Australia. Results show that the hydraulically induced fracture tends to be wider and longer in creep formation. What's more, the propagation pressure is also lower than that in poroelastic formation. Fluid diffusion from crack to the matrix is more efficient due to modulus decay. For mixed-mode fracturing, the creep of the formation facilitates the process of reorientation with higher fracture propagation speed between kink points. Poro-viscoelasticity Elsevier Creep Elsevier Numerical simulation Elsevier Hydraulic fracturing Elsevier Time-dependent deformation Elsevier Liang, Zhirong oth Chen, Zhixi oth Rahman, Sheikh S. oth Enthalten in Elsevier Science Baccelli, Francois ELSEVIER Iterated Gilbert mosaics 2019 Amsterdam [u.a.] (DE-627)ELV008094314 volume:196 year:2021 pages:0 https://doi.org/10.1016/j.petrol.2020.107640 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OPC-MAT 31.70 Wahrscheinlichkeitsrechnung VZ AR 196 2021 0 |
allfieldsGer |
10.1016/j.petrol.2020.107640 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001279.pica (DE-627)ELV052478688 (ELSEVIER)S0920-4105(20)30707-5 DE-627 ger DE-627 rakwb eng 510 VZ 31.70 bkl Song, Huifang verfasserin aut Numerical modelling of hydraulic fracture propagation in poro-viscoelastic formation 2021transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Modelling of hydraulic fracturing often deals with elastic deformation of rocks and fractures. Some rocks, such as the rock-salt and shale, however, displayed viscoelastic behaviour in both field investigation and lab creep tests. This time-dependent deformation poses a challenge in modelling and characterising of fracture propagation in such formations, thus adding complexity in a multi-physics scenario. In this paper, we intend to numerically model fracture propagation in viscoelastic formation and investigate the effect of creep on crack propagation and crack geometry. To incorporate pore pressure effect, we couple fluid diffusion with shale matrix viscoelasticity in the hydraulic fracturing propagation model. Therefore, a procedure for numerical modelling hydraulically-driven fracture propagation in poro-viscoelastic formation is developed. The method uses a poro-viscoelasticity theory to describe the fluid diffusion and matrix creep in solid skeleton, in conjunction with cohesive law based damage criteria to simulate crack growth and fluid flow in the crack. The modelling took shale as the representative sample. The viscoelastic properties were obtained via creep tests of shale samples from Roseneath formation, Cooper Basin, Australia. Results show that the hydraulically induced fracture tends to be wider and longer in creep formation. What's more, the propagation pressure is also lower than that in poroelastic formation. Fluid diffusion from crack to the matrix is more efficient due to modulus decay. For mixed-mode fracturing, the creep of the formation facilitates the process of reorientation with higher fracture propagation speed between kink points. Modelling of hydraulic fracturing often deals with elastic deformation of rocks and fractures. Some rocks, such as the rock-salt and shale, however, displayed viscoelastic behaviour in both field investigation and lab creep tests. This time-dependent deformation poses a challenge in modelling and characterising of fracture propagation in such formations, thus adding complexity in a multi-physics scenario. In this paper, we intend to numerically model fracture propagation in viscoelastic formation and investigate the effect of creep on crack propagation and crack geometry. To incorporate pore pressure effect, we couple fluid diffusion with shale matrix viscoelasticity in the hydraulic fracturing propagation model. Therefore, a procedure for numerical modelling hydraulically-driven fracture propagation in poro-viscoelastic formation is developed. The method uses a poro-viscoelasticity theory to describe the fluid diffusion and matrix creep in solid skeleton, in conjunction with cohesive law based damage criteria to simulate crack growth and fluid flow in the crack. The modelling took shale as the representative sample. The viscoelastic properties were obtained via creep tests of shale samples from Roseneath formation, Cooper Basin, Australia. Results show that the hydraulically induced fracture tends to be wider and longer in creep formation. What's more, the propagation pressure is also lower than that in poroelastic formation. Fluid diffusion from crack to the matrix is more efficient due to modulus decay. For mixed-mode fracturing, the creep of the formation facilitates the process of reorientation with higher fracture propagation speed between kink points. Poro-viscoelasticity Elsevier Creep Elsevier Numerical simulation Elsevier Hydraulic fracturing Elsevier Time-dependent deformation Elsevier Liang, Zhirong oth Chen, Zhixi oth Rahman, Sheikh S. oth Enthalten in Elsevier Science Baccelli, Francois ELSEVIER Iterated Gilbert mosaics 2019 Amsterdam [u.a.] (DE-627)ELV008094314 volume:196 year:2021 pages:0 https://doi.org/10.1016/j.petrol.2020.107640 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OPC-MAT 31.70 Wahrscheinlichkeitsrechnung VZ AR 196 2021 0 |
allfieldsSound |
10.1016/j.petrol.2020.107640 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001279.pica (DE-627)ELV052478688 (ELSEVIER)S0920-4105(20)30707-5 DE-627 ger DE-627 rakwb eng 510 VZ 31.70 bkl Song, Huifang verfasserin aut Numerical modelling of hydraulic fracture propagation in poro-viscoelastic formation 2021transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Modelling of hydraulic fracturing often deals with elastic deformation of rocks and fractures. Some rocks, such as the rock-salt and shale, however, displayed viscoelastic behaviour in both field investigation and lab creep tests. This time-dependent deformation poses a challenge in modelling and characterising of fracture propagation in such formations, thus adding complexity in a multi-physics scenario. In this paper, we intend to numerically model fracture propagation in viscoelastic formation and investigate the effect of creep on crack propagation and crack geometry. To incorporate pore pressure effect, we couple fluid diffusion with shale matrix viscoelasticity in the hydraulic fracturing propagation model. Therefore, a procedure for numerical modelling hydraulically-driven fracture propagation in poro-viscoelastic formation is developed. The method uses a poro-viscoelasticity theory to describe the fluid diffusion and matrix creep in solid skeleton, in conjunction with cohesive law based damage criteria to simulate crack growth and fluid flow in the crack. The modelling took shale as the representative sample. The viscoelastic properties were obtained via creep tests of shale samples from Roseneath formation, Cooper Basin, Australia. Results show that the hydraulically induced fracture tends to be wider and longer in creep formation. What's more, the propagation pressure is also lower than that in poroelastic formation. Fluid diffusion from crack to the matrix is more efficient due to modulus decay. For mixed-mode fracturing, the creep of the formation facilitates the process of reorientation with higher fracture propagation speed between kink points. Modelling of hydraulic fracturing often deals with elastic deformation of rocks and fractures. Some rocks, such as the rock-salt and shale, however, displayed viscoelastic behaviour in both field investigation and lab creep tests. This time-dependent deformation poses a challenge in modelling and characterising of fracture propagation in such formations, thus adding complexity in a multi-physics scenario. In this paper, we intend to numerically model fracture propagation in viscoelastic formation and investigate the effect of creep on crack propagation and crack geometry. To incorporate pore pressure effect, we couple fluid diffusion with shale matrix viscoelasticity in the hydraulic fracturing propagation model. Therefore, a procedure for numerical modelling hydraulically-driven fracture propagation in poro-viscoelastic formation is developed. The method uses a poro-viscoelasticity theory to describe the fluid diffusion and matrix creep in solid skeleton, in conjunction with cohesive law based damage criteria to simulate crack growth and fluid flow in the crack. The modelling took shale as the representative sample. The viscoelastic properties were obtained via creep tests of shale samples from Roseneath formation, Cooper Basin, Australia. Results show that the hydraulically induced fracture tends to be wider and longer in creep formation. What's more, the propagation pressure is also lower than that in poroelastic formation. Fluid diffusion from crack to the matrix is more efficient due to modulus decay. For mixed-mode fracturing, the creep of the formation facilitates the process of reorientation with higher fracture propagation speed between kink points. Poro-viscoelasticity Elsevier Creep Elsevier Numerical simulation Elsevier Hydraulic fracturing Elsevier Time-dependent deformation Elsevier Liang, Zhirong oth Chen, Zhixi oth Rahman, Sheikh S. oth Enthalten in Elsevier Science Baccelli, Francois ELSEVIER Iterated Gilbert mosaics 2019 Amsterdam [u.a.] (DE-627)ELV008094314 volume:196 year:2021 pages:0 https://doi.org/10.1016/j.petrol.2020.107640 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OPC-MAT 31.70 Wahrscheinlichkeitsrechnung VZ AR 196 2021 0 |
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The modelling took shale as the representative sample. The viscoelastic properties were obtained via creep tests of shale samples from Roseneath formation, Cooper Basin, Australia. Results show that the hydraulically induced fracture tends to be wider and longer in creep formation. What's more, the propagation pressure is also lower than that in poroelastic formation. Fluid diffusion from crack to the matrix is more efficient due to modulus decay. For mixed-mode fracturing, the creep of the formation facilitates the process of reorientation with higher fracture propagation speed between kink points.</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">Modelling of hydraulic fracturing often deals with elastic deformation of rocks and fractures. Some rocks, such as the rock-salt and shale, however, displayed viscoelastic behaviour in both field investigation and lab creep tests. 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The viscoelastic properties were obtained via creep tests of shale samples from Roseneath formation, Cooper Basin, Australia. Results show that the hydraulically induced fracture tends to be wider and longer in creep formation. What's more, the propagation pressure is also lower than that in poroelastic formation. Fluid diffusion from crack to the matrix is more efficient due to modulus decay. 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numerical modelling of hydraulic fracture propagation in poro-viscoelastic formation |
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Numerical modelling of hydraulic fracture propagation in poro-viscoelastic formation |
abstract |
Modelling of hydraulic fracturing often deals with elastic deformation of rocks and fractures. Some rocks, such as the rock-salt and shale, however, displayed viscoelastic behaviour in both field investigation and lab creep tests. This time-dependent deformation poses a challenge in modelling and characterising of fracture propagation in such formations, thus adding complexity in a multi-physics scenario. In this paper, we intend to numerically model fracture propagation in viscoelastic formation and investigate the effect of creep on crack propagation and crack geometry. To incorporate pore pressure effect, we couple fluid diffusion with shale matrix viscoelasticity in the hydraulic fracturing propagation model. Therefore, a procedure for numerical modelling hydraulically-driven fracture propagation in poro-viscoelastic formation is developed. The method uses a poro-viscoelasticity theory to describe the fluid diffusion and matrix creep in solid skeleton, in conjunction with cohesive law based damage criteria to simulate crack growth and fluid flow in the crack. The modelling took shale as the representative sample. The viscoelastic properties were obtained via creep tests of shale samples from Roseneath formation, Cooper Basin, Australia. Results show that the hydraulically induced fracture tends to be wider and longer in creep formation. What's more, the propagation pressure is also lower than that in poroelastic formation. Fluid diffusion from crack to the matrix is more efficient due to modulus decay. For mixed-mode fracturing, the creep of the formation facilitates the process of reorientation with higher fracture propagation speed between kink points. |
abstractGer |
Modelling of hydraulic fracturing often deals with elastic deformation of rocks and fractures. Some rocks, such as the rock-salt and shale, however, displayed viscoelastic behaviour in both field investigation and lab creep tests. This time-dependent deformation poses a challenge in modelling and characterising of fracture propagation in such formations, thus adding complexity in a multi-physics scenario. In this paper, we intend to numerically model fracture propagation in viscoelastic formation and investigate the effect of creep on crack propagation and crack geometry. To incorporate pore pressure effect, we couple fluid diffusion with shale matrix viscoelasticity in the hydraulic fracturing propagation model. Therefore, a procedure for numerical modelling hydraulically-driven fracture propagation in poro-viscoelastic formation is developed. The method uses a poro-viscoelasticity theory to describe the fluid diffusion and matrix creep in solid skeleton, in conjunction with cohesive law based damage criteria to simulate crack growth and fluid flow in the crack. The modelling took shale as the representative sample. The viscoelastic properties were obtained via creep tests of shale samples from Roseneath formation, Cooper Basin, Australia. Results show that the hydraulically induced fracture tends to be wider and longer in creep formation. What's more, the propagation pressure is also lower than that in poroelastic formation. Fluid diffusion from crack to the matrix is more efficient due to modulus decay. For mixed-mode fracturing, the creep of the formation facilitates the process of reorientation with higher fracture propagation speed between kink points. |
abstract_unstemmed |
Modelling of hydraulic fracturing often deals with elastic deformation of rocks and fractures. Some rocks, such as the rock-salt and shale, however, displayed viscoelastic behaviour in both field investigation and lab creep tests. This time-dependent deformation poses a challenge in modelling and characterising of fracture propagation in such formations, thus adding complexity in a multi-physics scenario. In this paper, we intend to numerically model fracture propagation in viscoelastic formation and investigate the effect of creep on crack propagation and crack geometry. To incorporate pore pressure effect, we couple fluid diffusion with shale matrix viscoelasticity in the hydraulic fracturing propagation model. Therefore, a procedure for numerical modelling hydraulically-driven fracture propagation in poro-viscoelastic formation is developed. The method uses a poro-viscoelasticity theory to describe the fluid diffusion and matrix creep in solid skeleton, in conjunction with cohesive law based damage criteria to simulate crack growth and fluid flow in the crack. The modelling took shale as the representative sample. The viscoelastic properties were obtained via creep tests of shale samples from Roseneath formation, Cooper Basin, Australia. Results show that the hydraulically induced fracture tends to be wider and longer in creep formation. What's more, the propagation pressure is also lower than that in poroelastic formation. Fluid diffusion from crack to the matrix is more efficient due to modulus decay. For mixed-mode fracturing, the creep of the formation facilitates the process of reorientation with higher fracture propagation speed between kink points. |
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Numerical modelling of hydraulic fracture propagation in poro-viscoelastic formation |
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