Modeling fluid flow interactions among regions of a well system

摘要

In some aspects, techniques and systems for simulating well system fluid flow are described. Multiple subsystem models each include fluid flow variables and represent well system fluid dynamics associated with a sub-region in a subterranean region. The subsystem models are connected by one or more junction models. The junction models represent interactions among the subsystem models. For each of the subsystem models, an elimination of internal variables of the subsystem model is performed to express the internal variables in terms of junction variables of the junction models. The junction variables are solved based on the junction models. The internal variables of the subsystem model are solved based on the solved junction variables.

主权项

1. A fluid flow simulation method for simulating well system fluid flow in a subterranean region, the method comprising:
identifying subsystem models associated with distinct subsystems within a subterranean region, each subsystem model including fluid flow variables and representing well system fluid flow dynamics associated with a sub-region in the subterranean region, the subsystem models being connected by junction models that represent interactions among the subsystem models; for each of the subsystem models, performing, by operation of one or more computers, an elimination of internal variables of the subsystem model to express the internal variables in terms of junction variables of the junction models; solving, using the one or more computers, the junction variables based on the junction models; and solving, using the one or more computers, the internal variables of the subsystem model based on the solved junction variables.