Dead oil viscosity

Dead oil viscosity measures the oil’s resistance to flow at atmospheric pressure. Three methods for estimating dead oil viscosity are presented.

1. Beggs and Robinson (1975)
$$\ln (\ln ({\mu }_{\text{od}}+1))=a_1+a_2{\gamma }_{API}+a_3\ln T$$ $$\overline{)\begin{array}{}\text{Coefficient}\text{Original}\\ a_1& 7.816432\\ a_2& -0.04658\\ a_3& -1.163\end{array}}$$




2. Glaso (1980)
$$\ln {\mu }_{\text{od}}=a_{\text{1}}+a_{\text{2}}\ln T+a_{\text{3}}\ln (\ln {\gamma }_{\text{API}})+a_{\text{4}}(\ln T)\ln (\ln {\gamma }_{\text{API}})$$ $$\overline{)\begin{array}{}\text{Coefficient}\text{Original}\\ a_1& 54.56805426\\ a_2& -7.179530398\\ a_3& -36.447\\ a_4& 4.478878992\end{array}}$$




3. Labedi (1992)
$$\ln {\mu }_{\text{od}}=a_{\text{1}}+a_{\text{2}}\ln {\gamma }_{\text{API}}+a_{\text{3}}\ln T$$ $$\overline{)\begin{array}{}\text{Coefficient}\text{Original}\\ a_1& 21.23904\\ a_2& -4.7013\\ a_3& -0.6739\end{array}}$$