Filtration Rate for API Fluid Loss Measurement Formula
Filtration Rate for API Fluid Loss Measurement calculates filtration rate for mud and cementing workflows in drilling engineering.
How engineers use this formula
Use this formula when the listed inputs (h_mc, A, DeltaP, k, mu) 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, dVf_dt equals 1.5504 cm^3/s.
0.2
45.6
6.8
0.001
1
Inputs
h_mc
cmFilter Cake Thickness
A
cm^2Filter Cake Area
DeltaP
atmPressure Difference
k
DFilter Cake Permeability
mu
cPFiltration Fluid Viscosity
Outputs
dVf_dt
Filtration Rate
k
Filter Cake Permeability
A
Filter Cake Area
DeltaP
Pressure Difference
mu
Filtration Fluid Viscosity
h_mc
Filter Cake Thickness
Source and review
reviewedDrilling Fluids Lab Course Notes, Altun, G. (2014)
Altun, G. 2013-2014. Drilling Fluids Lab Course Notes, ITU Petroleum and Natural Gas Engineering, Experiment 2, Page 4.
Source