Equivalent Atomic H/C Ratio for In-Situ Combustion Fuel Formula
Equivalent Atomic H/C Ratio for In-Situ Combustion Fuel calculates equivalent atomic hydrogen-to-carbon ratio of combustion fuel for waterflooding and eor workflows in reservoir engineering.
How engineers use this formula
Use this formula when the listed inputs (m_CO, c_N2, c_O2, c_CO2) are known and the assumptions behind the cited waterflooding and eor 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, x_HC equals 0.34 ratio.
0.1
0.75
0.03
0.15
Inputs
m_CO
fractionMole ratio of carbon monoxide to carbon emissions
c_N2
mole fractionNitrogen concentration
c_O2
mole fractionOxygen concentration
c_CO2
mole fractionCarbon dioxide concentration
Outputs
x_HC
Equivalent atomic hydrogen-to-carbon ratio of combustion fuel
m_CO
Mole ratio of carbon monoxide to carbon emissions
c_N2
Nitrogen concentration
c_O2
Oxygen concentration
c_CO2
Carbon dioxide concentration
Source and review
reviewedThermal Recovery, Prats, M. (1986)
Prats, M. 1986. Thermal Recovery. Society of Petroleum Engineers, New York, Chapter 8, Page 91.
Source