Abstract: In this paper we demonstrate the influence of the pore pressure on the development of a hydraulically-driven fracture in a poroelastic medium. We present a novel numerical model for propagation of a planar hydraulic fracture and prove its correctness by the analysis of the numerical convergence and by the comparison with known solutions. The advantage of the algorithm is that it does not require distinguishing of the fracture's tips and reconstruction of the numerical mesh according to the fracture propagation. Next, we perform a thorough analysis of the interplay of fluid filtration and redistribution of stresses near the fracture. We demonstrate that the fracture length decreases with the increase of the Biot's number (the parameter that determines the contribution of the pore pressure to the stress) and explain this effect by analysing the near-fracture pore pressure, rock deformation and stresses. We conclude that the correct account for the fluid exchange between the fracture and the rock should be based not only on physical parameters of the rock and fluid, but also on the analysis of stresses near the fracture.

Cite: Golovin S.V. , Baykin A.N.
Influence of pore pressure on the development of a hydraulic fracture in poroelastic medium
International Journal of Rock Mechanics and Mining Sciences. 2018. V.108. P.198-208. DOI: 10.1016/j.ijrmms.2018.04.055 WOS Scopus РИНЦ OpenAlex

Identifiers:

Web of science:	WOS:000438315100019
Scopus:	2-s2.0-85049303663
Elibrary:	35750698
OpenAlex:	W2963264453

Citing:

DB	Citing
Scopus	29
Web of science	24
Elibrary	31
OpenAlex	29

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