Gas Solubility in a Mud System Formula
Gas Solubility in a Mud System calculates solution gas to mud ratio for mud and cementing workflows in drilling engineering.
How engineers use this formula
Use this formula when the listed inputs (f_o, f_w, f_e, r_so, r_sw, r_se) 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_sm equals 102 dimensionless.
0.6
0.35
0.05
150
20
100
Inputs
f_o
dimensionlessVolume Fraction of Base Oil
f_w
dimensionlessVolume Fraction of Water
f_e
dimensionlessVolume Fraction of Emulsifier
r_so
dimensionlessSolution Gas to Base-Oil Component Ratio
r_sw
dimensionlessSolution Gas to Water Component Ratio
r_se
dimensionlessSolution Gas to Emulsifier Component Ratio
Outputs
r_sm
Solution Gas to Mud Ratio
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