PR-07Foundational
Production Allocation & Back-Allocation
Splits the metered facility total back to individual wells with a documented, repeatable method instead of a spreadsheet nobody can audit.
Production & Artificial LiftDomainIT
PR-06IntermediateWave 2AIDomain
Virtual Flow Metering
In one sentence
Estimates each well’s oil, water and gas rate continuously from pressure and temperature, between the physical tests.
The problem
A well is physically tested once or twice a month, and that single measurement is carried as the well’s rate for the entire period. Any change in between is invisible, and allocation error accumulates against it.
How it works
A hybrid model couples a mechanistic multiphase flow calculation across the choke and tubing with a data-driven correction trained on the well’s own test history. Estimates carry uncertainty, and the model reports when it has drifted far enough from the last test to need a new one.
Data required
- Wellhead pressure and temperature at high frequency, upstream and downstream of the choke
- Choke position with a calibrated Cv curve
- Well test history with test quality flags
- PVT properties and completion geometry
What you get
- Continuous three-phase rate estimate per well with uncertainty band
- Drift alert recommending a physical test
- Improved allocation input for the production accounting system
What it cannot do
Virtual metering is a supplement to physical testing, not a replacement for it, and it should never be used as a fiscal measurement. Accuracy degrades when the well moves outside the conditions covered by its test history, particularly during rapid water-cut change, and choke Cv drift on eroded chokes is a persistent source of bias that only recalibration fixes.
Every capability page states a real limitation. If a vendor cannot tell you where their product stops, you are not being told the truth about where it starts.
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