临邑-濮阳原油管道结蜡层的组成与流变性研究  

Composition and Rheology of Wax Deposits in Linyi-Puyang Crude Oil Pipelines

作　　者：王国涛 程梁[2] 李传宪[2] 杨飞[2] 张莹[2] 蔡金洋[2] WANG Guo-tao CHENG Liang LI Chuan-xian YANG Fei ZHANG Ying CAI Jin-yang(Sinopec Pipeline Storage and Transportation Branch Company, Xuzhou 221000, China Department of Oil ＆ Gas Storage and Transportation Engineering, China University of Petroleum, Qingdao 266580, China)

机构地区：[1]中石化管道储运有限公司,江苏徐州221000 [2]中国石油大学(华东)储运与建筑工程学院,山东青岛266580

出　　处：《高校化学工程学报》2016年第5期1014-1020,共7页Journal of Chemical Engineering of Chinese Universities

基　　金：国家自然科学基金(51204202);山东省自然科学基金(ZR2012EEQ002);中央高校基本科研业务费专项资金(14CX02210A;15CX06072A)

摘　　要：以临邑-濮阳管道所输原油与临邑-赵寨子(结蜡层1)和赵寨子-莘县(结蜡层2)管段处的结蜡层为研究对象,通过SARA分析、DSC热分析、流变测量、气相色谱分析和宏观、微观形貌观察的方法,研究了管输原油与结蜡层的组成与流变特性。实验结果表明,与管输原油相比,结蜡层的凝点、析蜡点、含蜡量、饱和分含量和沥青质含量均有大幅升高,而芳香组分和胶质含量减少;黏度和屈服值显著增大;低碳数正构烷烃显著减少,高碳数正构烷烃显著增加;蜡晶结构由细小的针状和片状蜡晶变为类球状蜡晶和大针状和片状蜡晶。两种结蜡层相比,结蜡层1的析蜡点更高,蜡含量更少,沥青质含量更多;黏度和屈服值更大;高碳数正构烷烃含量更多;宏观和微观形态上来看,结蜡层1的片状针状蜡晶更多、尺寸更大、结构更为致密。因此,在临邑-濮阳管道的临邑站-赵寨子站管段,清管球卡死的现象更容易发生。The composition and rheological properties of crude oil in Linyi-Puyang pipeline and two waxdeposits in the pipelines of Linyi-Zhaozhaizi （wax deposit 1） and Zhaozhaizi-Shenxian （wax deposit 2） werecharacterized by SARA, DSC, rheological measurements, HTGC, macroscopic and microscopic observation.The results show that pour point, WAT, wax content, saturation and asphaltene content, viscosity, yield andheavy n-alkane content of the wax deposits increase significantly when compared with crude oil, but lightn-alkane content of the wax deposits decreases. The wax crystal of the crude oil is small needle-like structure,while the crystal of the wax deposit has spherical and large needle-like structures. WAT, asphaltene content,viscosity, yield, heavy n-alkane of wax deposit 1 are higher than that of deposit 2, but the light n-alkane of waxdeposit 1 are lower than that of wax deposit 2. The wax deposit 1 contains more and larger plate-like/needle-likewax crystals, which are also more compact than that of wax deposit 2. Therefore, pigs are easier to be stucked inthe pipeline of Linyizhaozhaizi section.

关 键 词：原油管道 结蜡层 组成 碳数分布 流变性 宏观和微观结构 

分 类 号：TE832[石油与天然气工程—油气储运工程]