Reservoir EngineeringUnconventional Reservoirs
Langmuir Adsorbed Gas Content Formula
Langmuir Adsorbed Gas Content calculates adsorbed gas content for unconventional reservoirs workflows in reservoir engineering.
How engineers use this formula
Use this formula when the listed inputs (V_L, P, P_L) are known and the assumptions behind the cited unconventional reservoirs 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, G_c equals 571.428571 SCF/ton.
V_LSCF/ton
800
Ppsi
500
P_Lpsi
200
Inputs
V_L
SCF/tonLangmuir Volume
P
psiReservoir Pressure
P_L
psiLangmuir Pressure
Outputs
G_c
SCF/ton
Adsorbed Gas Content
V_L
SCF/ton
Langmuir Volume
P
psi
Reservoir Pressure
P_L
psi
Langmuir Pressure
Source and review
reviewedAhmed, T., McKinney, P.D. 2005. Advanced Reservoir Engineering, Gulf Publishing of Elsevier, Chapter 4, Page 320.
Source