Petromium Tools / Formula set NODAL-001

Production Nodal Analysis

Versioned inflow + tubing outflow · all physical intersections · retained sensitivities · V2.0

Mode

Units

Browser-only dependency snapshots · bottomhole analysis node · no automatic operating selection

All physical roots retained

Inflow / outflow intersections

Inflow and outflow curves

Operating point where inflow meets outflow

ControlledNODAL-001 v1.0.0

Figure data

Sensitivity cases behind the nodal figure
Case
1
2

Selected analysis node

Production system

Operating point 402.5 m³/day at 188.5 bar

Schematic · not to scaleControlledNODAL-001 v1.0.0

Figure data

Solved operating points behind the system figure
Crossing	Rate (m³/day)	Node pressure (bar)	Residual (Pa)	Root
1	402.5297	188.5083	-61.656	bracketed

More than one crossing means the inflow and outflow curves meet more than once; every crossing is listed.

Base status

single

Physical roots

System and case

Worksheet name

Fluid system

U2 oil IPR coupled to U4 single-phase liquid outflow. NODAL-001 calls the dependency engines without copying their equations.

Frozen snapshots

Dependency controls

Reservoir pressure

Known top pressure

Tubing internal diameter

Productivity indexm3/s/Pa

Oil inflow method

Dependency set evaluated

Calculation audit

0 warnings

Operating rate

2,531.8359

STB/d

Node pressure

2,734.082

psia

Residual

-61.656

Root type

bracketed

BOTTOMHOLE_ANALYSIS_NODE

The selected analysis node is bottomhole pressure shared by the released inflow and tubing-outflow dependencies.

DEPENDENCY_ORCHESTRATION_ONLY

NODAL-001 orchestrates released dependency engines and does not duplicate their inflow or pressure-traverse equations.

MULTIPHASE_METHODS_BLOCKED

Only U4's released single-phase liquid and entered-property gas paths are available; multiphase methods remain Gate C blocked.

SCREENING_NOT_OPTIMIZATION

Operating points and sensitivities are screening results, not an automatic choke, tubing, lift, network, or operating recommendation.

Failures and no-root states retained

Sensitivity matrix

Reservoir pressure 90%

single1,839.331 STB/d

Tubing ID 110%

single2,613.916 STB/d

Versioned input snapshots

Dependency fingerprints

IPR-001 v1.0.0fnv1a32:7cb03b57inflow

VLP-001 v1.0.0fnv1a32:b1065020outflow

Dependency catalog: IPR-001 · GAS-DELIV-001 · VLP-001. Fingerprints change whenever their stored inputs change.

Named local systems

Browser snapshots

Save a snapshot to restore this complete dependency set on this device.

Dependency and decision scope

Model boundary

Formula

NODAL-001 v1.0.0

Active inflow

IPR-001

Outflow

VLP-001

Included: versioned single-phase inflow/outflow dependencies, bottomhole-node pressure balance, all roots, deterministic fingerprints, and retained sensitivities.

Excluded: multiphase tubing, lift/choke/network selection, transient response, economics, and operating authorization. MULTIPHASE_METHODS_BLOCKED

Operational boundary: Auditable screening aid only. It does not select or authorize a choke, tubing, lift method, network change, or operating rate and does not replace validated multiphase/transient simulation and competent engineering review.