Dimensionless Time in Wet Combustion - Kuo Formula
Dimensionless Time in Wet Combustion - Kuo calculates dimensionless wet-combustion time for waterflooding and eor workflows in reservoir engineering.
How engineers use this formula
Use this formula when the listed inputs (M_s, M_r, alpha_s, t, h_t) are known and the assumptions behind the cited waterflooding and eor 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, t_D equals 0.167184 dimensionless.
40
35
0.8
100
50
Inputs
M_s
BTU/ft^3-KVolumetric heat capacity of steam
M_r
BTU/ft^3-KVolumetric heat capacity of reservoir
alpha_s
ft^2/dayThermal diffusivity of steam to overburden
t
dayElapsed combustion time
h_t
ftReservoir thickness
Outputs
t_D
Dimensionless wet-combustion time
M_s
Volumetric heat capacity of steam
M_r
Volumetric heat capacity of reservoir
alpha_s
Thermal diffusivity of steam to overburden
t
Elapsed combustion time
h_t
Reservoir thickness
Source and review
reviewedThermal Recovery, Prats, M. (1986)
Prats, M. 1986. Thermal Recovery. Society of Petroleum Engineers, New York, Chapter 8, Page 104.
Source