秦京线输送冀东原油低输量运行特性研究

Research on Low Flow Operation Characteristic of QinJing Pipeline Transports JiDong Crude Oil

根据中国石油股份公司规划,针对2008年以后秦京线输送冀东原油低输量运行需求,研究了冀东原油基本物性和流变特性,冀东原油最佳热处理温度是60℃。筛选出针对冀东原油最佳改性效果的降凝剂,凝点降低幅度13.5℃,降粘率86.6%。制定了秦京线输送冀东原油2.8×106t/a的运行方案。针对秦京线在低输量条件下的管道运行特性,包括热负荷能力、结蜡规律、能耗费用、最优清管方案和加剂原油流动性变化规律进行了深入研究,秦京线冬季工况下结蜡厚度最大值50.24mm,经济清管周期是34d。研究成果为秦京线2008年以后输送冀东原油提供了安全保障和技术支持。

According to CNPC plan and low flow operation necessity of QinJing pipeline transports JiDong crude oil after 2008,the basic physical characteristic and rheological characteristic of JiDong crude oil were investigated. The best heating treatment temperature of JiDong crude oil was 60 ℃. The best benefication PPD of JiDong crude oil was selected,with pour point decreased 13.5 ℃ and viscosity decreasing rate up to 86.6 percent. The operation scheme of QinJing pipeline transports 2.8×106 t/a JiDong crude oil was also established. In allusion to the low flow operation characteristic of QinJing pipeline transports JiDong crude oil,such as heat load capability,wax deposition law,energy expenditure,optimized pigging plan and the flow transformation law of the PPD benefited oil were studied in detail. The maximum of wax deposition thckness was 50.24 mm,and optimized pigging period was 34 days in winter operation condition of QinJing pipeline transports JiDong crude oil. The research production provided safe guarantee and technology support for QinJing pipeline transports JiDong crude oil after 2008.