Reservoir EngineeringReservoir Volumetrics
Hydrocarbon Pore Volume from Pore Volume and Water Saturation Formula
Hydrocarbon Pore Volume from Pore Volume and Water Saturation calculates hydrocarbon pore volume for reservoir volumetrics workflows in reservoir engineering.
How engineers use this formula
Use this formula when the listed inputs (PV, S_wi) are known and the assumptions behind the cited reservoir volumetrics relationship match the engineering case being checked.
Assumptions
- Input values are representative for the well, reservoir, fluid, or equipment case being evaluated.
- The declared units match the field-unit constants used in the formula.
- The cited formula applies to the selected petroleum engineering workflow.
Limitations
- The calculation does not replace a full engineering model or operating procedure.
- Accuracy depends on the source correlation, assumptions, input quality, and unit consistency.
Common mistakes
- Mixing unit systems without converting the inputs.
- Using default example values as field recommendations.
- Applying the formula outside the source assumptions.
Default example
Using the default inputs, HCPV equals 7,540,776 bbl.
PVbbl
10054368
S_wifraction
0.25
Inputs
PV
bblReservoir Pore Volume
S_wi
fractionInitial Water Saturation
Outputs
HCPV
bbl
Hydrocarbon Pore Volume
PV
bbl
Reservoir Pore Volume
S_wi
fraction
Initial Water Saturation
Source and review
reviewedPenn State PNG 301. Volumetric method fluid saturation and saturation-constraint terms.
Source