Phase Behavior and ThermodynamicsFluid Properties
Standing Live Oil Density Correlation Formula
Standing Live Oil Density Correlation calculates live oil density for fluid properties workflows in phase behavior and thermodynamics.
How engineers use this formula
Use this formula when the listed inputs (gamma_o, R_s, gamma_g, t) 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, rho_o equals 44.001516 lb/ft^3.
gamma_odimensionless
0.85
R_sSCF/STB
600
gamma_gdimensionless
0.75
tF
180
Inputs
gamma_o
dimensionlessStock-Tank Oil Specific Gravity
R_s
SCF/STBSolution Gas-Oil Ratio
gamma_g
dimensionlessGas Specific Gravity
t
FTemperature
Outputs
rho_o
lb/ft^3
Live Oil Density
F_standing
dimensionless
Standing Correlating Parameter
B_o_standing
bbl/STB
Standing Oil Formation Volume Factor Term
Source and review
reviewedBoyun Guo, William C. Lyons, and Ali Ghalambor. Petroleum Production Engineering: A Computer-Assisted Approach, Page 2/20.
Source