Hammerlindl Method for Gas in Place Formula
Hammerlindl Method for Gas in Place calculates gas in place for material balance and production workflows in reservoir engineering.
How engineers use this formula
Use this formula when the listed inputs (G_app, R) are known and the assumptions behind the cited material balance and production 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 equals 588,235,294.117647 SCF.
500000000
0.85
Inputs
G_app
SCFApparent Gas in Place
R
dimensionlessEffective Total-System Compressibility to Gas Compressibility Ratio
Outputs
G
Gas in Place
G_app
Apparent Gas in Place
R
Effective Total-System Compressibility to Gas Compressibility Ratio
Source and review
reviewedAdvanced Reservoir Engineering, Ahmed, T., McKinney, P. D. (2005)
Ahmed, T. and McKinney, P. D. 2005. Advanced Reservoir Engineering, Gulf Publishing of Elsevier, Chapter 3, Page 216.
Source