沥青质沉积特征及控制策略研究进展

Recent Research Progress of Asphaltene Deposition Characteristics and Control Strategies

对于含沥青质油藏,沥青质可能在原油生产整个过程中析出,沉积在近井地带储层、生产系统的内表面或者生产设备中,从而造成流动保障问题。在石油的生产、加工和运输过程中,沥青质沉淀问题越来越受到人们的重视,目前已成为石油工业中需要重点研究和解决的技术问题之一。针对沥青质沉积问题,分析了沥青质的组成和分子结构,调研了沥青质析出原因及有效控制策略,总结了沥青质稳定性评价方法、析出动态表征方法和沥青质析出后的补救措施,并提出了沥青质下一步研究方向,对解决油藏沥青质沉积问题提供了思路。

For the reservoirs which containing asphaltene, the asphaltene might exclude during the process of the whole oil production and deposit in the wellbore surrounding reservoir, the inner surface of production system, and the equipment inside, which would cause the flow assurance problem. During the process of oil production, treatment and transportation, people have pay more and more attention on the asphahene deposition problem and it has become one of the main themes in the petroleum industry researches. Many works have been done about this problem, which include： （1） the composition and molecular structure of the asphahene has been analyzed; （2） the asphahene precipitation reason and the effective control strategies have been studied; （3） the asphaltene stability evaluation method, the precipitation dynamic characteristics and the remedial measures after the precipitation was summarized; （4） the further asphahene research direction has been put forward. All these researches have provided thoughts to solve the asphaltene precipitation problem in reservoir.