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高凝固点原油在油藏开采过程中是一个非常棘手的问题，研究高凝固点原油的成因，对于开采过程中降低高凝固点原油的工艺措施具有重大指导意义。对取自大港油田的高凝固点原油样品从轻烃、全烃、饱和烃色质、芳烃色质等方面进行测试分析，并结合实际地质情况综合判断，认为该区的高凝固点原油的成因与原油在运移过程中遭受的水洗作用有关，轻烃尤其是苯和甲苯等轻芳烃的散失是造成原油具有高凝固点的重要原因。还对水洗作用对一些常用的原油轻烃指标的影响进行了研究。
The high freezing point of crude oil in the process of reservoir exploitation is a very difficult problem. The study of the origin of crude oil with high freezing point is of great guiding significance for the process of reducing the crude oil with high freezing point in the mining process. The samples of high freezing point crude oil from Dagang Oilfield were tested and analyzed from the aspects of light hydrocarbon, total hydrocarbon, saturated hydrocarbon, aromatics, and combined with the actual geological conditions, it is concluded that the origin of crude oil with high freezing point in this area is related to crude oil The water washed during transportation is related to the loss of light aromatic hydrocarbons, especially light hydrocarbons such as benzene and toluene, which are the important reasons for the high freezing point of crude oil. The effect of water washing on some common crude oil light hydrocarbon indices was also studied.