Combined Solubility of Hydrocarbon Gas, CO2, and H2S in a Mud Component Formula
Combined Solubility of Hydrocarbon Gas, CO2, and H2S in a Mud Component calculates combined gas solubility in the mud component for mud and cementing workflows in drilling engineering.
How engineers use this formula
Use this formula when the listed inputs (f_h, f_CO2, f_H2S, r_sh, r_sCO2, r_sH2S) are known and the assumptions behind the cited mud and cementing 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, r_s_component equals 142.5 SCF/bbl.
0.8
0.15
0.05
100
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500
Inputs
f_h
dimensionlessMole Fraction of Hydrocarbon Gas
f_CO2
dimensionlessMole Fraction of Carbon Dioxide
f_H2S
dimensionlessMole Fraction of Hydrogen Sulfide
r_sh
SCF/bblHydrocarbon Gas Solubility in the Mud Component
r_sCO2
SCF/bblCarbon Dioxide Solubility in the Mud Component
r_sH2S
SCF/bblHydrogen Sulfide Solubility in the Mud Component
Outputs
r_s_component
Combined Gas Solubility in the Mud Component
Source and review
reviewedAdvanced Well Control, Watson, D., Brittenham, T., Moore, P.L. (2003)
Watson, D., Brittenham, T., and Moore, P.L. 2003. Advanced Well Control, Vol. 10, Society of Petroleum Engineers, Page 16.
Source