Wellbore Electric Voltage Generation Formula
Wellbore Electric Voltage Generation calculates voltage for electrical properties workflows in petrophysics.
How engineers use this formula
Use this formula when the listed inputs (V_e_w, DeltaV_e, r, r_e, r_w) 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, V equals 1.651468 V.
2
0.5
100
1000
0.5
Inputs
V_e_w
VElectric Voltage at Wellbore Radius
DeltaV_e
VVoltage Drop Between Wellbore Radius and Drainage Radius
r
ftSpecific Radial Location
r_e
ftDrainage Radius
r_w
ftWellbore Radius
Outputs
V
Voltage
V_e_w
Electric Voltage at Wellbore Radius
DeltaV_e
Voltage Drop Between Wellbore Radius and Drainage Radius
r
Specific Radial Location
r_e
Drainage Radius
Source and review
reviewedThermal Recovery, Prats, M. (1986)
Prats, M. 1986. Thermal Recovery. Society of Petroleum Engineers, New York, Chapter 14, Page 188.
Source