TY - JOUR

T1 - On the simultaneous growth of multiple hydraulic fractures emanating from an inclined well

AU - Valov, A. V.

N1 - Funding Information: Author acknowledges the support of Gazprom Neft Science and Technology Center. This work is also supported by the Ministry of Science and Higher Education of the Russian Federation (Grant No.14.W03.31.0002). Publisher Copyright: © 2021 Institute of Physics Publishing. All rights reserved.

PY - 2021/11/8

Y1 - 2021/11/8

N2 - The primary focus of this paper is to investigate the interaction between simultaneously propagating multiple fractures, initiated from an inclined well. In particular, the aim is to better understand the influence of the well inclination angle on the stress shadow between the fractures and on the overall resulting geometry of individual cracks. To simplify the analysis, the paper assumes the limit of large perforation friction, which leads to a uniform flux distribution between the fractures. The mathematical model for multiple hydraulic fractures is constructed by coupling together the respective models for individual fractures, each representing a single planar fracture model. In this approach, the fracture induced stress or stress shadow from a previous time step is used as an input for a given single hydraulic fracture to propagate independently. Further, to reduce computational burden, the effects associated with tangential stresses and displacements are neglected, whereby the stress interaction between the fractures is solely described by the normal opening and the normal stress component. Numerical results are presented for the storage viscosity dominated regime, whereby the effects of toughness and leak-off are negligible. An interesting behaviour is observed, demonstrating that the well inclination angle plays a significant role on the overall fracture symmetry. For zero inclination, all the fractures are nearly symmetrical and identical. However, once well inclination is introduced, this breaks the symmetry, making a profound effect on the final result.

AB - The primary focus of this paper is to investigate the interaction between simultaneously propagating multiple fractures, initiated from an inclined well. In particular, the aim is to better understand the influence of the well inclination angle on the stress shadow between the fractures and on the overall resulting geometry of individual cracks. To simplify the analysis, the paper assumes the limit of large perforation friction, which leads to a uniform flux distribution between the fractures. The mathematical model for multiple hydraulic fractures is constructed by coupling together the respective models for individual fractures, each representing a single planar fracture model. In this approach, the fracture induced stress or stress shadow from a previous time step is used as an input for a given single hydraulic fracture to propagate independently. Further, to reduce computational burden, the effects associated with tangential stresses and displacements are neglected, whereby the stress interaction between the fractures is solely described by the normal opening and the normal stress component. Numerical results are presented for the storage viscosity dominated regime, whereby the effects of toughness and leak-off are negligible. An interesting behaviour is observed, demonstrating that the well inclination angle plays a significant role on the overall fracture symmetry. For zero inclination, all the fractures are nearly symmetrical and identical. However, once well inclination is introduced, this breaks the symmetry, making a profound effect on the final result.

UR - http://www.scopus.com/inward/record.url?scp=85119610862&partnerID=8YFLogxK

U2 - 10.1088/1742-6596/2057/1/012079

DO - 10.1088/1742-6596/2057/1/012079

M3 - Conference article

AN - SCOPUS:85119610862

VL - 2057

JO - Journal of Physics: Conference Series

JF - Journal of Physics: Conference Series

SN - 1742-6588

IS - 1

M1 - 012079

T2 - 6th All-Russian Conference on Thermophysics and Physical Hydrodynamics, TPH 2021 and the School for Young Scientists on Thermal Physics and Physical Hydrodynamics: Modern Challenges, TPHMC2021

Y2 - 22 August 2021 through 29 August 2021

ER -