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The range of influence of the poroelastic effects in terms of dimensionless complexes for the radial hydraulic fracturing model. / Baykin, A. N.
в: International Journal of Rock Mechanics and Mining Sciences, Том 128, 104240, 04.2020.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - The range of influence of the poroelastic effects in terms of dimensionless complexes for the radial hydraulic fracturing model
AU - Baykin, A. N.
N1 - Publisher Copyright: © 2020 Elsevier Ltd Copyright: Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020/4
Y1 - 2020/4
N2 - In our previous work the fully coupled model of the planar hydraulic fracture propagation in a poroelastic medium was developed. In present paper we simplify this model to the case of axisymmetric fracture propagation in order to find the conditions whereby the poroelastic effects are essential. We consider two dimensionless complexes responsible for the transition from 1D to 3D filtration and for the poroelastic influence on the fracture geometry. Analyzing a large set of case studies, we find the critical values for these parameters below which the aforementioned physical effects are not important. Particularly, we demonstrate that 1D pressure diffusion is preserved until the diffusion length scale is 2.4 times smaller than the fracture size. In turn, the diffusion scale plays a central role in the poroelastic stress influence on the fracture propagation. Also, we show that in case of low closure stress the pressure diffusion is dominated not by the filtration process but by the rock deformation with a slight impact on the fracture geometry. We believe that this study will become useful for the appropriate model selection in engineering practice.
AB - In our previous work the fully coupled model of the planar hydraulic fracture propagation in a poroelastic medium was developed. In present paper we simplify this model to the case of axisymmetric fracture propagation in order to find the conditions whereby the poroelastic effects are essential. We consider two dimensionless complexes responsible for the transition from 1D to 3D filtration and for the poroelastic influence on the fracture geometry. Analyzing a large set of case studies, we find the critical values for these parameters below which the aforementioned physical effects are not important. Particularly, we demonstrate that 1D pressure diffusion is preserved until the diffusion length scale is 2.4 times smaller than the fracture size. In turn, the diffusion scale plays a central role in the poroelastic stress influence on the fracture propagation. Also, we show that in case of low closure stress the pressure diffusion is dominated not by the filtration process but by the rock deformation with a slight impact on the fracture geometry. We believe that this study will become useful for the appropriate model selection in engineering practice.
KW - Diffusion scale
KW - Dimensionless complexes
KW - Finite element method
KW - Hydraulic fracture
KW - Pore pressure influence
KW - Poroelasticity
KW - PRESSURE
KW - IMPACT
KW - PROPAGATION
UR - http://www.scopus.com/inward/record.url?scp=85079687793&partnerID=8YFLogxK
U2 - 10.1016/j.ijrmms.2020.104240
DO - 10.1016/j.ijrmms.2020.104240
M3 - Article
AN - SCOPUS:85079687793
VL - 128
JO - International Journal of Rock Mechanics and Minings Sciences
JF - International Journal of Rock Mechanics and Minings Sciences
SN - 1365-1609
M1 - 104240
ER -
ID: 23593500