Modeling Complex Processes
Enhanced Oil Recovery processes usually involve complex phase behaviors between the injected and in-situ fluids. We model the multiphase behavior using a robust negative-flash based tie-simplex parameterization approach. Application of our technique significantly improves the stability, accuracy and efficiency of the multiphase thermal-compositional simulation.
Flexibility of unstructured grids allows accurate representation of complex geometry. These techniques are used for discrete feature modeling and flow simulation in the near-well region.
Convergence of the Fully Implicit Method usually requires special nonlinear solvers. Here, we compare a number of nonlinear iterations needed to solve a problem of compositional flow for four different solvers: (1) used a local chop and (2) flash reduction of the unknowns; also (3) based on under-relaxation, and (4) trust-regions of a flux function.