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不同原油因族组成和碳数分布差异,低温流动性往往差别较大。以阿赛管道沿线站场原油为研究对象,测定各油样族组分及碳数分布,利用灰色关联模型,分别以原油凝点和黏度为评价指标,系统分析了原油族组成及碳数分布中各单因素对原油凝点及黏度的影响程度,给出了各因素对原油低温流动性的贡献大小。结果表明:在原油组分中,蜡含量是影响原油低温流动特性最主要的因素,胶质、沥青质的影响则相对较小,油分含量对原油低温流动性的影响也不容忽视;在原油的碳数分布中,碳数分布在C16以下的油质对原油低温流动性的影响最大,而碳数分布在C16~C25和C31~C33的非晶蜡对原油低温流动性的影响程度较碳数分布在C26~C30和C34~C53的微晶蜡高。(图1,表4,参13)。
Different crude oil composition and distribution due to differences in carbon, low-temperature liquidity is often quite different. Crude oil in the pipeline site along the pipeline was used as the research object to determine the composition and carbon number distribution of each oil sample. Based on the gray relational model and crude oil freezing point and viscosity respectively, the composition and carbon number distribution In each single factor on the crude oil freezing point and the degree of viscosity, given the factors that contribute to the low temperature fluidity of crude oil. The results show that wax content is the most important factor influencing the low temperature fluidity of crude oil, and the influence of gum and asphaltene is relatively small. The influence of oil content on the low temperature fluidity of crude oil should not be neglected. In the carbon number distribution, the oil with carbon number below C16 has the greatest influence on the low temperature fluidity of crude oil, while the amorphous wax with C16 ~ C25 and C31 ~ C33 carbon number has a greater influence on the low temperature fluidity of crude oil than the carbon number Microcrystalline wax distribution in C26 ~ C30 and C34 ~ C53 high wax. (Figure 1, Table 4, reference 13).