Correlation coefficients A and B
Coefficients A and B for the viscosity of gas-saturated oil, from the gas-oil ratio at 15 °C and atmospheric pressure.
A = exp(−0.008724 × Gf₁₅ + 0.0000129 × Gf₁₅²); B = exp(−0.004711 × Gf₁₅ + 0.0000083 × Gf₁₅²)Inputs
You can change a field's unit: the value is converted to the formula's units automatically.
Unit converter for this formulaGas-oil ratio
- m³/m³1
- m³/m³ (15 °C)0.982944
- Nm³/m³ (0 °C)0.931776
- scf/bbl5.52946
- bbl/bbl0.984839
Gas at standard conditions (m³/m³ at 20 °C, scf/bbl at 60 °F); the oil volume is not converted. The correction for the oil's thermal expansion is in the "Gas-oil ratio at 15 °C" calculator.
- B — Coefficient B–
More in Reservoir fluid properties (PVT)
Viscosity of degassed oil at standard conditions from its density, for oil with a density of 0.845 to 0.924 g/cm³, in mPa·s.
Viscosity of degassed oil at standard conditions from its density, for oil with a density of 0.78 to 0.845 g/cm³, in mPa·s.
Viscosity of degassed oil at a given temperature from its laboratory viscosity and the coefficient a, in mPa·s. The coefficient c is chosen from the viscosity: 10 for μ > 1000, 100 for 10 ≤ μ ≤ 1000, 1000 for μ < 10.
Coefficient a for converting the viscosity of degassed oil to another temperature. The coefficients b and c are chosen from the viscosity: b = 0.00252 and c = 10 for μ > 1000; b = 0.00144 and c = 100 for 10 ≤ μ ≤ 1000; b = 0.00076 and c = 1000 for μ < 10.
Viscosity of gas-saturated oil at reservoir conditions from the degassed oil viscosity and the correlation coefficients A and B, in mPa·s.
Converts the gas content of oil from standard conditions to 15 °C and atmospheric pressure, in m³/m³.
Results are engineering estimates from standard formulas; for design decisions check them against the codes, project documents and specialists' calculations. The formulas carried over from the original set are unchanged, and their errors are described in the notes.