Standard Discharge Time for Saybolt Viscosimeter Measurements Formula
Standard Discharge Time for Saybolt Viscosimeter Measurements calculates standard discharge time for fluid properties workflows in phase behavior and thermodynamics.
How engineers use this formula
Use this formula when the listed inputs (t_o, T_s, T_o) are known and the assumptions behind the cited fluid 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_s equals 100.128 s.
100
100
120
Inputs
t_o
sMeasured Discharge Time
T_s
deg FStandard Temperature
T_o
deg FTest Temperature
Outputs
t_s
Standard Discharge Time
t_o
Measured Discharge Time
T_o
Test Temperature
T_s
Standard Temperature
Source and review
reviewedPetroleum and Natural Gas Laboratory Course Notes, I-Fluid Properties, Mihcakan, I. M., Alkan, K. H., Ugur, Z. (2001)
Mihcakan, I. M., Alkan, K. H., and Ugur, Z. 2001. Petroleum and Natural Gas Laboratory Course Notes, I-Fluid Properties, ITU Petroleum and Natural Gas Engineering, Page 2-6.
Source