PetrophysicsRock Properties
Amplitude Transmission Coefficient in Seismic Reflection and Refraction Formula
Amplitude Transmission Coefficient in Seismic Reflection and Refraction calculates amplitude transmission coefficient for rock properties workflows in petrophysics.
How engineers use this formula
Use this formula when the listed inputs (Z_1, Z_2) 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, T equals 0.8 dimensionless.
Z_1MRayl
6
Z_2MRayl
9
Inputs
Z_1
MRaylAcoustic Impedance of Medium 1
Z_2
MRaylAcoustic Impedance of Medium 2
Outputs
T
dimensionless
Amplitude Transmission Coefficient
Z_1
MRayl
Acoustic Impedance of Medium 1
Z_2
MRayl
Acoustic Impedance of Medium 2
Source and review
reviewedUniversity of Alberta. 2008. Geophysics 210 Final Exam Formula Sheet.
Source