西南石油大学学报(自然科学版) ›› 2003, Vol. 25 ›› Issue (6): 49-52.DOI: 10.3863/j.issn.1000-2634.2003.06.14

• 油气化学工程与化工 • 上一篇    下一篇

含蜡原油结构形成机理研究

敬加强 杨莉 秦文婷 罗平亚
  

  1. (1.西南石油学院国家重点实验室,四川 南充 637001; 2.西南石油学院)
  • 收稿日期:2002-11-06 修回日期:1900-01-01 出版日期:2003-12-20 发布日期:2003-12-20

STUDY ON MECHANISM OF WAXY CRUDE OIL STRUCTURE FORMATION

JING Jia-qiang YANG Li QIN Wen-ting LUO Ping-ya

  

  1. (Southwest Petroleum Institute, Nanchong Sichuan 637001, China)
  • Received:2002-11-06 Revised:1900-01-01 Online:2003-12-20 Published:2003-12-20

摘要:

基于蜡与沥青的红外光谱、含蜡模拟油微观结构以及结晶学理论,对含蜡原油结构形成机理进行了探讨。研究表明,含蜡原油结构形成的机理就是晶核形成、蜡晶生长和蜡晶颗粒连接的机理,其基本条件包括:高分子蜡或沥青质、胶质等大分子物质形成晶核;蜡晶随蜡分子与晶核间的相互作用增大而不断形成与生长,并形成蜡晶颗粒;蜡晶颗粒相互作用增强,致使颗粒彼此接触、“搭架”形成结构。弄清含蜡原油的结构形成机理,有助于含蜡原油的降凝降粘机理及其低温流动改进技术的研究。

关键词: 结构, 晶核形成, 蜡晶生长, 蜡晶连接, 含蜡原油

Abstract:

Based on the infrared spectra of paraffin and asphaltene, the microstructure of simulated waxy oils and crystallographic theories, mechanism of structure formation for waxy crude oils has been discussed. Results show that the mechanism is that of the formation of crystalline nucleuses, the growth of paraffin crystals and the interconnection of paraffin crystalline particles. The basic conditions include that macromolecules such as paraffin or asphaltene or resin form crystalline nucleuses, paraffin crystalline particles continuously form and grow as increase of the interactions between the paraffin molecules and crystalline nucleuses. The increase of the interactions among paraffin crystalline particles leads the particles to contact each other and bridge to form the structure. To understand fully the mechanism of structure formation of waxy crude oils is very helpful to investigate that of their pour point depression and viscosity reduction, and the improving technology of their flow-ability at lower temperature.

Key words: structure, formation of crystal nucleus, growth of paraffin crystal, interconnection of paraffin crystalline particles, waxy crude oil

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