关键词: 石油, 沥青质, 碳氢化合物, 沉积, 抑制剂, 粒度分布, 作用机理

Abstract: Asphaltene deposition in crude oil will lead to blockage of oil wells and gathering pipelines, thus affecting the normal production of crude oil and the efficient development of oil fields. The elemental analysis, XPS and FTIR analysis of asphaltenes in Iranian BA crude oil show that the asphaltene surface functional group is mainly composed of hydrocarbons (C-C, C-H), and also contains acidic functional groups such as fats sulfur (thiophenol and mercaptan) and carboxyl groups provide a theoretical basis for the selection of asphaltene deposition inhibitors. The inhibitor inhibits the coagulation by destroying the interaction of the asphaltene association. The particle size distribution of the asphaltene particles after the addition of n-heptane (precipitant) to the crude oil is measured by a laser particle size analyzer. The addition of the amine-containing basic group inhibitor FAE183 can inhibit the flocculation and precipitation of asphaltenes, and the particle size of the asphaltenes is significantly reduced. It is known from the mechanism of action of the inhibitor that the main mechanism of action of FAE183 inhibitor and asphaltenes is acid-base action, supplemented by hydrogen bonding and dipole action.

Key words: petroleum, asphaltene, hydrocarbons, deposition, inhibitor, particle size distribution, mechanism of action