Abstract: The present invention provides a method, a system and a program storage device containing instructions for simulating the flow of fluid in a physical system using a composition-based extensible object-oriented program. A computer program includes: (i) a framework subsystem providing a graph package, a compute package and a property package; (ii) an engine subsystem including engine subsystem packages for performing numerical simulation, the engine subsystem packages including a linear solver package and a non-linear solver package; and (iii) a set of model components providing physical and numerical modeling behaviors utilized by the engine subsystem, the model components including at least one of a reservoir model, a well model, an aquifer model, a fluid model and a SCAL model. The framework subsystem, the engine subsystem and the model components work with one other to simulate the flow of fluid.

Abstract: A method for enhancing the allocation of fluid flow rates among a plurality of well bores in fluid communication with at least one subterranean reservoir is disclosed. An objective function and system equations are generated which utilize constraint violation penalties associated with soft constraints. The soft constraints are constraints which may be violated if necessary to arrive at a feasible solution to optimizing the objective function and the system equations. The fluid flow rates are then allocated among the well bores as determined by the optimizing of the objective function and system equations. Fluid flow rates among well bores, particularly those exhibiting similar fluid characteristics, may be related to one another. Initial flow rates of components (oil, gas, and water) and pressures in the well bores may be determined by an initial simulation run.