© Copyright 2005 POSC Product Flow Model Overview

© Copyright 2005 POSC Flow Component Hierarchy Model – Collection of networks. –Network – Collection of connected units. Unit – Black box with ports. –Port – Allows flow in or out. »Node – Allows ports to connect.

© Copyright 2005 POSC Product Flow Model Defines the flow behavior of something (normally larger installations). Collection of networks. –The model is represented by one network. –The other networks represent smaller things within the model. External ports. –Allows models to connect.

© Copyright 2005 POSC Product Flow Network Represents the internal behavior of the model or a unit in another network. Collection of connected units. Ports expose internal nodes. Port Network Unit Node

© Copyright 2005 POSC Product Flow Unit A black box with ports but internal network allows drill-down for more details. A unit can represent: –A complex thing like a platform or separator. –A simple thing like a valve or choke. Contextual knowledge (i.e., what does this unit represent).

© Copyright 2005 POSC Product Flow Port Expected direction (inlet or outlet). Connects to one Node –May represent many-to-many connection. Expected Product Flow (for validation). –For example, oil production or gas injection.

© Copyright 2005 POSC Node All ports that are connected to the same node are connected to each other. For an actual flow diagram the graphics may ignore the node. asserts a connection Port Node Unit

© Copyright 2005 POSC Flow Assumptions Steady state fluid flow across nodes and ports. That is, pressure is constant across internally and externally connected ports and nodes. Conservation of mass across a node or port. The temperature and other properties can vary between connected ports. Pressure can vary internally between ports on a unit. Connections between models should be one-to-one so that mass balance concerns are internal to each model.

© Copyright 2005 POSC Internal Network of a Unit Corresponding ports have the same name (i.e., they are logically the same port). There is no pressure change across ports or nodes. Thus, there is no pressure change between ports A2 and C1. B B1 B3 B2 B Internal Network B1 C1 A A2 B3 C

© Copyright 2005 POSC Direction The direction is the intended direction of flow. A change in pressure across a unit can change the actual flow direction at a port. In the Product Volume Report: –A positive volume represents an intended direction (i.e., a flow out of an outlet port or into an inlet port). –A negative volume represents an unintended direction (i.e., a flow into an outlet port and out of an inlet port). B3

© Copyright 2005 POSC Expected Product Flow Pairs of product kind and flow kind where: –Product = oil, gas, condensate, aqueous, oleic, vapor, water, carbon dioxide gas, etc. –Flow = production, injection, consume, import, export, gas lift, overboard, etc.

© Copyright 2005 POSC Properties The Product Flow Model only defines connectivity (i.e., how things could flow). The Product Volume Report can define: –A period of time (e.g., day, month, YTD, etc). –A type of flow (e.g., production, injection, etc). –A type of product (e.g., oil, aqueous, gas, etc). –A volume and other fluid properties at a port. –A pressure difference across a unit.

© Copyright 2005 POSC Summary Flow behavior defined by Network, Unit, Port and Node (connection). Unit can represent anything (big or small). Steady state fluid flow across ports/nodes Conservation of mass across ports/nodes. Properties are assigned by the Product Volume Report.