Recent Research Progress of Asphaltene Deposition Characteristics and Control Strategies

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 asphaltene 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 asphaltene has been analyzed; 2 the asphaltene 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 asphaltene research direction has been put forward. All these researches have provided thoughts to solve the asphaltene precipitation problem in reservoir.