Method and system for coupling reservoir and surface facility simulations

A method for coupling independent reservoir and surface facility network simulators, the method comprising:

• (a) providing a reservoir simulator configured to simulate fluid flow in subterranean reservoirs and a surface facility network simulator configured to simulate fluid flow in production equipment;
• (b) initiating simulation of fluid flow in a subterranean reservoir using the reservoir simulator;
• (c) initiating simulation of fluid flow in production equipment using the surface facility network simulator, the fluid flow in the production equipment including fluids produced from the subterranean reservoir;
• and
• (d) coupling the simulation of fluid flow in the subterranean reservoir with the simulation of fluid flow in the production equipment using a sub-domain inflow performance relationship,
• wherein the sub-domain inflow performance relationship defines reservoir sub-domains for the reservoir simulator, defines nodes and connecting edges for the reservoir sub-domains, and creates a property map including static and dynamic reservoir properties.