PetrophysicsRock Properties
Poissons Ratio Seismic Arrival Time Method Formula
Poissons Ratio Seismic Arrival Time Method calculates poissons ratio for rock properties workflows in petrophysics.
How engineers use this formula
Use this formula when the listed inputs (V_p, V_s) 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, nu equals 0.21875 dimensionless.
V_pm/s
5000
V_sm/s
3000
Inputs
V_p
m/sCompressional Wave Velocity
V_s
m/sShear Wave Velocity
Outputs
nu
dimensionless
Poissons Ratio
V_p
m/s
Compressional Wave Velocity
V_s
m/s
Shear Wave Velocity
Source and review
reviewedZoback, M.D. 2007. Reservoir Geomechanics. Cambridge University Press, Page 64.
Source