Non-Isothermal Models to Determine the Rheological Constants of Different Kuwaiti Crude Oils

Abstract

The rheological characteristics of four Kuwaiti crude oils (MG 23T, MG 29T, MG 34T and MG 108T) in the temperature range 298–313 K were investigated using the Bingham, Ostwald–de Waele, Herschel–Bulkley, Casson, and modified Casson models. The experimental data of the shear stress were modeled as a function of the shear rate and temperature. Statistical estimations were used to determine the most accurate model and non-isothermal empirical relations. The Ostwald–de Waele and Herschel–Bulkley models yielded the most accurate predictions for MG 23T, MG 29T and MG 108T, and MG 34T, respectively.