Standard methods were used to determine the physical parameters of Nigerian crude oils sampled from Flowing Tubing Head Pressure (FTHP) of well heads in different locations. Direct correlations of the HLB values with the measured physical parameters were not observed. However, with the same r2 value of 87%, the total acid number (TAN)-a precursor to the HLB, increases exponentially as API gravity decreases and increases as the viscosity increases in power regressions. The correlation of the total acid number of the sampled crudes with the dielectric constant values has a coefficient of determination of 0.74 in power regression. The results showed that Nigerian crude oil samples are low in the components that may contribute to the effective HLB and chemical stabilizations. Electrical factors resulting from wax and solid particles may be more responsible for the stability of their emulsions. These serves as a prelude to the application of interrelationships in some crude oil’s physical properties in screening and selection of water in-crude oil emulsion demulsifiers. The results also provide a means of predicting the naphthenic acid corrosivity of Nigerian crude oil using their physical parameters.