- Oil viscosity below bubblepoint
- Labedi (1992) $${\mu}_{\text{l}}=\frac{{\mu}_{\text{ob}}}{1-m({p}_{b}-p)}$$ $$\mathrm{ln}m={a}_{\text{1}}+{a}_{\text{2}}\mathrm{ln}{\gamma}_{API}+{a}_{\text{3}}\mathrm{ln}{p}_{\text{b}}$$ $$\overline{)\begin{array}{cc}\text{Coefficient}& \text{Original}\\ {a}_{1}& -8.92482\\ {a}_{2}& 1.13020\\ {a}_{3}& -0.45577\end{array}}$$

Oil viscosity below bubblepoint pressure measures the oil’s resistance to flow. Two methods for estimating oil viscosity below bubblepoint pressure are presented.