Product Flow Model

1. Product Flow Model Overview

2. 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.

3. 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.

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

5. 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).

6. 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.

7. Unit Port Node 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

8. 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.

9. B1 B2 B A A2 B3 B Internal Network C C1 B2 B1 B3 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.

10. 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

11. 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.

12. 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.

13. 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.