Authors: Osamah Alomair, Adel Elsharkawy and Hassan Alkandari
Viscosity is a key property for evaluation, simulation and development of petroleum reservoirs. The accurate prediction of viscosity will be helpful for, production forecasting, designing future of thermal recovery processes. Reservoir oil viscosity is usually measured isothermally at reservoir temperature.However, at temperature other than reservoir temperature these data are estimated by empirical correlations. Here, based on results of viscosity measurements of 33 heavy crude oil samples of API gravity ranging from 10° and 20°degree, at 68 oF collected from various areas of Kuwaiti oil fields, and tested at 68 to 320 oF. Anew correlation has been developed. The validity and accuracy of this correlation has been confirmed by comparing the obtained results of this correlation with other published ones. The results were satisfactory in contrast to other correlations which were mostly developed for significantly lighter oils at average reservoir temperatures. Most of them cannot reasonably predict the heavy oil viscosity at elevated temperatures.
Keywords: Unconventional Oil; Heavy Oil;Elevated Temperature Viscosity; Kuwaiti Crudes;