松辽盆地南部套保地区稠油成因

利用地球化学技术手段，结合地质背景资料，对松辽盆地南部套保稠油的形成过程进行研究。综合分析认为，套保地区的原油来自东侧的中央坳陷青山口组，经过长距离（约50km）的油气运移，被套保逆断层截挡，聚集在套保地区。由于运移距离长，储层的层析、过滤作用导致原油凝固点低、沥青质含量低，同时地层水的氧化、水洗作用和生物降解作用使本区原油变重、变稠，胶质含量高，从而形成具有一定特点的稠油。

Origin of Heavy Oil in Taobao Area of Southern Songliao Basin

According to the geological data, the formation process of heavy oil in Taobao area is studied, by using geochemical techniques. It is considered that the crude oil of the area began from the Qingshankou Formation of the central sag in the east, migrated for about 50 kilometers and was hindered by the Taobao adverse fault and at last was accumulated in the area. Because of long distance migration, the bed absorbing process and filtration of the reservoir leads to the low freezing point and low asphaltene of...