The numerical model described in this paper has been designed to provide a realistic 3D solution for fracture propagation in minimal computation time.

The procedure used to solve the equations ensures a numerically stable model since there is no iteration between the mechanical equilibrium and pressure drop equations.

Comparisons with available results are given. They show good concordance for a wide range of data. A parametric study is also given and the results are compared with the Nolte analysis of the propagation pressure.

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