Reservoir EngineeringMaterial Balance
Havlena-Odeh Cumulative Water Influx from Fluid Withdrawal Formula
Havlena-Odeh Cumulative Water Influx from Fluid Withdrawal calculates cumulative water influx for material balance workflows in reservoir engineering.
How engineers use this formula
Use this formula when the listed inputs (F, G, E_G) are known and the assumptions behind the cited material balance 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, W_e equals 100,000 bbl.
Fbbl
5100000
GSCF
1000000000
E_Gbbl/SCF
0.005
Inputs
F
bblFluid Withdrawal
G
SCFGas in Place
E_G
bbl/SCFGas Expansion Term
Outputs
W_e
bbl
Cumulative Water Influx
F
bbl
Fluid Withdrawal
G
SCF
Gas in Place
E_G
bbl/SCF
Gas Expansion Term
Source and review
reviewedAhmed, T. and McKinney, P.D. 2005. Advanced Reservoir Engineering, Gulf Publishing of Elsevier, Chapter 3, Page 209.
Source