Features of Hydraulic Fracture Growth near Free Surface in Isotropic Poroelastic Medium
A. V. Azarov, M. V. Kurlenya, S. V. Serdyukov, A. V. Patutin
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630091 Russia
Keywords: Hydraulic fracturing, mathematical modeling, working fluid leakage, pore pressure, Гидравлический разрыв, математическое моделирование, утечки рабочей жидкости, поровое давление
Abstract
Numerical modeling results on growth of axially symmetric hydraulic fracture new free surface in isotropic poroelastic medium are presented. The problem was solved using extended finite element method based on phantom nodes and cohesion model of failure. Trajectories of the fracture are calculated for different distances from free surface under injection of certain volume of working fluid with regard to the fluid leakage. The influence of impermeable boundary on the hydraulic fracture growth is analyzed.
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