Calculation modules
Every module runs on the same isolated math engine and reports in both unit systems. Current entry units: ft depth, in diameter, ppg density, psi pressure.
Wellbore Volumes
Tubing, annular and casing capacity and volume over an interval, from ID/OD and length.
Capacity · Volume · Flow area
Hydrostatics
Fluid gradient, hydrostatic head and static bottomhole pressure, with the pressure/depth profile.
Gradient · Hydrostatic · BHP
Packer Differential
Pressure either side of the string at packer depth and the net differential across the element.
Tubing · Annulus · Differential
Vogel IPR
Inflow performance curve for a solution-gas-drive well, from a well test or a stated AOF.
AOF · PI · IPR curve
SCP Diagnostics
API RP 90 evaluation of sustained casing pressure: thermal threshold, bleed-down outcome, recovery curve and MAWOP comparison, per annulus.
Bleed-down · MAWOP · Classification
How results are produced
- Calculations live in an isolated, unit-tested module; the interface only formats what it returns.
- Inputs are validated before they reach the engine, and the engine validates again independently.
- Diagram settings are display-only — changing them never re-runs a calculation.
- PDF and Excel exports carry the inputs, the results and the tabulated curve behind each chart.