Abstract:

Six kinds of crude oil from the gathering-transportation station of SINOPEC Shengli Oilfield are selected, desalinated and dehydrated in the laboratory. The physical properties, elemental composition, chemical composition, and structural composition of the dehydrated crude oil are determined. The results show that Gudao crude oil has the highest asphaltene and sulfur content and the worst properties among the six kinds of Shengli crude oil, followed by Gudong crude oil with the highest acid value and carbon residue, while Chunliang crude oil and Haoxianlian crude oil have high wax content, both exceeding 20%, low density, less than 0.9 g/cm³, and their processing properties are similar. The values of molecular weight, aromaticity, total ring number and aromatic ring of gum and asphaltene of Gudao crude oil are the highest among the six kinds of crude oil, indicating that Gudao crude oil has the worst properties and is the most difficult to dehydrate and desalinate, followed by marine crude oil and Gudong crude oil, while the values of gum and asphaltene of Chunliang crude oil, Haoxianlian crude oil and gathering-transportation crude oil are relatively small, indicating that these three kinds of crude oil have good properties, and dehydration and desalting is easy.

Key words: Shengli crude oil, dehydration, gum, asphaltene, structural parameter

摘要：

自胜利油田集输站选取6种原油，在实验室内脱盐脱水，并测定了脱水后原油物理性质、元素组成、化学组成、结构组成。研究结果表明：6种胜利原油中孤岛原油沥青质、硫含量最高，性质最差；其次是孤东原油，其酸值、残炭最高；而纯梁原油、郝现联原油的蜡质量分数高，都超过20%,密度小，20℃下低于0.9 g/cm³,其加工性能比较接近。孤岛原油的胶质和沥青质的分子量、芳碳率、总环数、芳香环数在6种原油中数值最大，说明孤岛原油性质最差，脱水脱盐难度最大，其次是海洋原油与孤东原油，而纯梁原油、郝现联原油、集输原油的胶质和沥青质的含量比较低，说明这3种原油性质优良，脱水脱盐难度小。

关键词: 胜利原油, 脱水, 胶质, 沥青质, 结构参数