... conservation equations and hydraulic equations, there are pressure or flow rate constraints applied to any node or connection. A pressure constraint may specify the pressure at a node: (10) R = P − P s p e c = 0 and a flow rate constraint is applied to any connection: (11) R...

... to maximize a benefit function subject to surface pipeline network rate and pressure constraints. This procedure is formulated as a nonlinearly constrained optimization problem solved by the Generalized Reduced Gradient (GRG) method. The values of benefit function, constraint functions, and derivatives needed...

.... A constraint is always enforced at a connection, and an active constraint equation replaces the connection's hydraulics equation. In general, there are two types of constraints - rate constraints and pressure constraints. Rate Constraint Various types of rate are constrained. Any of these can...

... coefficient pressure constraint rate constraint gradient constraint coupling perforation reservoir simulation cpu time efficiency reservoir simulator network equation wellbore model symposium simulator newton iteration process simulation equation of state formulation composition...

... ABSTRACT A new procedure for the determination of well production rates from surface pipeline network and well tubinghead pressure constraints is presented. The well production rates are calculated using simultaneous modeling of multiphase fluid flow in the reservoir, well perforations, well...

... wellhead pressure. It is also called from the field and group levels to increase the flow rate of the desired phase by artificially lifting wells selected from a list of wells which had previously violated the wellhead pressure constraints. Three artificial lift options, namely, sucker-rod pump lift...