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A Partition of Unity Based Model for Hydraulic FracturingNormal access

Authors: E.W. Remij, J.J.C. Remmers, J.M. Huyghe and D.M.J. Smeulders
Event name: 76th EAGE Conference and Exhibition 2014
Session: Geomechanics and Fracture Propagation
Publication date: 16 June 2014
DOI: 10.3997/2214-4609.20141077
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 548.36Kb )
Price: € 20

Summary:
In this contribution we present a partition of unity based model for the simulation of hydraulic fracturing processes. Bulk poroelasticity is based on the Biot theory. The pressure in the fracture is included as an additional degree of freedom. A Fracture can grow in arbitrary directions by using the Camacho Ortiz fracture criterion with a cohesive zone formulation. The performance of the numerical model is addressed by considering fracture propagation from a 2D borehole. The initial stress field is validated with Kirsch's analytical solution. The results from the numerical model indicate that preferred direction of a hydraulic fracture is in the direction of the highest confining stress. In future works this model will include the nucleation of fractures and can be applied to more complex hydraulic fracturing situations.


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