Experimental Research on Deformation Change of Waxy Crude oil With Uniformly Increased Stress

The experiments of constant stress loading rate were conducted in order to investigate the deformation problem for waxy crude oil. The yield strains have a small range from 0.01 to 0.20. The yield stress increases dramatically with the decreasing temperature and is less dependent on the stress loading rate. The yield time decreased as the stress loading rate is increased at a certain temperature.