Method for Estimating Oil Viscosity via Dielectric Spectroscopy

The physical properties of bitumen (i.e., asphalt) are a topic of consistent interest in the fields of oil, gas, and mining. In this study, the relationship between bitumen viscosity and the rotation of asphaltene clusters was empirically explored via broadband dielectric spectroscopy (BDS). Cluster size was found to be independent of the concentration, and BDS was found to be a reliable means to predict viscosity in neat bitumen and concentrated solutions. Because of the simplicity and portability of modern impedance analyzers, this technique offers a unique method for estimating a wide range of oil viscosities in the field (from <10(1) to >10(5) cP) and even offers the possibility of in situ oil viscosity monitoring in pipelines or oil-lubricated mechanical systems.