In order to provide basic data and theoretical basis for developing wax inhibitor/remover, current status of oil well wax deposit in Yanchang oilfield was analyzed. Based on national relevant norms and standards, composition of crude oil from Yanchang oilfield was analyzed as well as carbon number distribution of wax and oil viscosity-temperature relationship, and the wax precipitation law was studied.%针对目前延长油田油井结蜡现状，为了给清防蜡药剂的研制提供基础数据和理论依据，采用国家或行业的相关规范和标准，分析了延长原油的组成以及原油中蜡的碳数分布和粘温关系等，并深入研究其析蜡规律。
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