PetrophysicsRock Properties
Error Percentage of Porosity Measurements Formula
Error Percentage of Porosity Measurements calculates porosity error percentage for rock properties workflows in petrophysics.
How engineers use this formula
Use this formula when the listed inputs (phi_m, phi_ps) are known and the assumptions behind the cited rock properties 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, E_phi equals 9.090909 %.
phi_mfraction
0.22
phi_psfraction
0.2
Inputs
phi_m
fractionMeasured Porosity
phi_ps
fractionCalculated Porosity or Pseudo-Porosity
Outputs
E_phi
%
Porosity Error Percentage
phi_m
fraction
Measured Porosity
phi_ps
fraction
Calculated Porosity or Pseudo-Porosity
Source and review
reviewedMihcakan, I.M., Alkan, K.H. and Ugur, Z. 2001. Petroleum and Natural Gas Laboratory Course Notes, ITU, Page 1-7.
Source