Study on the Effect of Crude Oil Composition on Waxing Characteristics of Waxy Crude Oil

The waxing deposition characteristics of crude oil is of great significance to the exploitation and transportation of high waxy crude oil. Therefore, three series of simulated crude oils were prepared on the basis of composition analysis and composition remixing of crude oil. The carbon distribution of oil samples and their corresponding wax components were analyzed by high temperature gas chromatography. The variation of waxing point, peak temperature and average exothermic enthalpy of these simulated crude oils were measured by Differential Scanning Calorimetry (DSC). The results showed that the increase of resin and asphaltene content had little effect on the waxing apprearance temperature (WAT) and Wax precipitation peak temperature (WAPT). The increase of aromatics content significantly decreased them, while some asphaltene may precipitate. The increase of wax content will greatly increase these two temperature, which is detrimental to the wax removal by heating method. (paper)