原油水洗作用与高凝固点原油的成因探讨

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、芳烃色是行测试分析，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

Probe on the water washing with genesis of high solidifying point crude oil

The recovering of the crude oil with high solidifying point is a hard nut to crack. It is very important to study the genesis of the crude oil with high solidifying point, which is conductive to the measures taken to reduce the solidifying point of crude oil in recovering. In this paper, the whole hydrocarbons and light hydrocarbons of some oil samples with high solidifying point from Dagang Oil Field were measured. In combination with geological conditions, it is concluded comprehensively that the high solidifying point oil is mainly concerned with the water washing of crude oil during migration. The lost of light hydrocarbon, especially benzene and toluene, is responsible for the high solidifying point in crude oil. Moreover, water washing also influences some light hydrocarbon indexes commonly used.