@article { author = {Karimi, Yavar and Solaimany Nazar, Ali Reza}, title = {Measurement and Prediction of Time-independent and Time-dependent Rheological Behavior of Waxy Crude Oil}, journal = {Iranian Journal of Oil and Gas Science and Technology}, volume = {6}, number = {1}, pages = {26-44}, year = {2017}, publisher = {Petroleum University of Technology}, issn = {2345-2412}, eissn = {2345-2420}, doi = {10.22050/ijogst.2017.44374}, abstract = {Wax deposition phenomenon changes the rheological behavior of waxy crude oil completely. In the current work, the rheological time-dependent and time-independent behaviors of waxy crude oil samples are studied and flow curve and compliance function are measured for the oil samples with various wax contents at different temperatures. A decrease in temperature and an increase in wax content lead to an increase in the viscosity and yield stress but a significant drop in compliance function. A modified Burger model is developed to predict the behavior of the compliance function and a modified Casson model is used to predict the flow curve of the waxy crude oil samples within a vast range of wax contents and temperatures. The proposed Burger and Casson models match with experimental results with R2 of 99.7% and 97.33% respectively.}, keywords = {Waxy Crude Oil,Viscoelastic Properties,Rheological Model,Flow Curve}, url = {https://ijogst.put.ac.ir/article_44374.html}, eprint = {https://ijogst.put.ac.ir/article_44374_4128cfd2c5fd3c8b5d24ac51f38894d1.pdf} }