Hydraulic fracture in porous media

Abstract eng:
Hydraulic fracture in porous media which involves fluid flow/diffusion and solid deformation is a complex multi-physic process frequently observed in the nature world and engineering application. In this paper the coupled extended finite element method (CXFEM) is developed to study the hydraulic fracture in permeable rocks. In CXFEM, the fluid flow in the fracture and interstitial flow in the medium are solved in a unified framework by assuming that the fracture is a special type of porous media and introducing Poiseuille-type fluid flow inside the fracture. The biggest advantage of this computational model is that it is very convenient to deal with the fluid flow inside the complex fracture network. The dynamic effect and the influence of the permeability on the hydraulic driven fracture problems are studied.

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