PetrophysicsElectrical Properties
Resistivity Bed Reflection Coefficient Formula
Resistivity Bed Reflection Coefficient calculates coefficient of reflection for electrical properties workflows in petrophysics.
How engineers use this formula
Use this formula when the listed inputs (R_1, R_2) are known and the assumptions behind the cited electrical 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, C_R equals 0.6 dimensionless.
R_1ohm m
20
R_2ohm m
5
Inputs
R_1
ohm mResistivity of First Formation Bed
R_2
ohm mResistivity of Second Formation Bed
Outputs
C_R
dimensionless
Coefficient of Reflection
R_1
ohm m
Resistivity of First Formation Bed
R_2
ohm m
Resistivity of Second Formation Bed
Source and review
reviewedTheory, Measurement, and Interpretation of Well Logs, Bassiouni, Z. (1994)
Bassiouni, Z. 1994. Theory, Measurement, and Interpretation of Well Logs. SPE Textbook Series Vol. 4, Chapter 5, Page 96.
Source