Correlation of bitumen viscosity with temperature and pressure

Abstract

A previous viscosity‐temperature correlation (Puttagunta et al., 1992) is extended to include a pressure term and employed successfully in predicting the combined effect of temperature and pressure on the viscosity of Canadian bitumens and heavy oils. Predictions are made on new sets of data based on a single measurement of viscosity at 30°C and 101.3 kPa pressure; and the results show similar accuracy as obtained in the sets of data used in developing the correlation. The correlation yields an absolute average deviation between predicted and experimental viscosity of 4.79% and a correlation coefficient of 0.99 over a range of temperatures between 20 and 120°C and gauge pressures between 0 and 18 MPa.

Rapid Estimation of Heavy Oil Viscosities Using a Novel Predictive Tool Approach

“…The derived equations are applied to calculate new coefficients for equation (10) to predict the viscosity of heavy oil. Table 1 shows the tuned coefficients for equations (11) to (14) for predicting the viscosity of heavy crude oil. In brief, the following steps are repeated to tune the correlation's coefficients using Matlab Table 1.…”

Viscosity Estimation for Bitumen-Diluent Mixtures

“…This paper describes the 'application of a generalized viscosity-temperature correlation [Puttagunta, Miadonye and Singh, 1993) to predict viscosities of binary mixtures of bitumen-diluent systems.…”

“…The mixtures were considered as new samples, and the effect of temperature on their viscosities predicted using the heavy oil correlation of Puttagunta et al (1993):…”

Measurement and Correlation of Viscosity and Density for Compressed Athabasca Bitumen at Temperatures Up to 200ºC

“…Mehrotra (1992c) developed a mixing rule for predicting the viscosity of Alberta bitumens saturated with pure gases (nitrogen, carbon monoxide, methane, carbon dioxide, and ethane) . Puttagunta et al (1993) proposed a correlation that predicted the combined effect of temperature and pressure on the viscosity of Canadian bitumens and heavy oils. Miadonye et al (1994) proposed a correlation for predicting bitumen viscosity that requires only a single viscosity measurement.…”