McMullen Engineering
Validation of Elastic-Plastic Wellbore Finite Element Model
This page demonstrates how analytical soliutions from the literature can be utilized to validate nonlinear elastic-plastic finite element analysis. The problem examined is wellbore failure due to excessive drawdown pressure. The Abaqus finite element software, which has geomechanics modeling capabilities was utilized in this study. Software was written to implement the analytical formulation for this problem given in {1}. Elastic-plastic finite element solutions from Abaqus matched the analytical solutions.
{1} Risnes, R., Bratli, R. K., Hosrud, P.,"Sand Stresses Around a Wellbore," SPE J. , 22(06), SPE9650-PA, (1982), pp. 883-898.
Summary of the model with Loads and Boundary Conditions.
Abaqus Finite Element Solution.
Analytical solution using formulation from {1} with no-flow conditions.
Analytical solution with 60 BBL/day production.T