关键词: 特超稠油, 水热反应, 降黏, 集输

Abstract: Shengli extra-heavy crude oil was aquathermolysis treated under low temperature with the aim of reducing its viscosity for better gathering and transferring. Analyses of viscosity, elemental composition, SARA (saturates, aromatics, resins and asphaltines), fraction distribution and salt content of crude samples treated under various aquathermolysis conditions were carried out. It was found that the viscosity of Shengli extra-heavy crude could be significantly reduced by aquathermolysis treatment, and the viscosity of the treated crude was heavily depended on the cracking conversion. The cracking conversion of extra-heavy crude could be enhanced by adding catalyst, increase aquathermolysis temperature and time effectively. With the presence of suitable catalyst, the treated temperature was lower and treated time was shortened. Using a coke base porosity catalyst A, under the conditions of an aquathermolysis temperature of 330℃ and a treated time of 60 min, the cracking conversion reached 30.11%, the viscosity of Shengli extra-heavy crude was dropped to 1 536 mPa·s from the original of 52 410 mPa·s, a viscosity reduction rate of 97.07% was obtained. The fluidity of the treated crude was improved significantly and it can be gathered and transferred as conventional crude, which indicates that the application of aquathermolysis in the field of pipeline transporting heavy crude is promising.

Key words: Extra-heavy crude oil, aquathermolysis, viscosity break, gathering and delivering