摘要
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。
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 crude oil. Meanwhile, the crude oil gets heavy and dense and of high resin, due to oxidation, water washing and biodegradation of formation water. Thus the crude oil has certain characteristics of heavy oil.
出处
《中国石油勘探》
CAS
2009年第4期26-28,共3页
China Petroleum Exploration
关键词
松辽盆地
西部斜坡
套保
稠油
碳同位素
油源对比
Songliao Basin
west slope
Taobao
heavy oil
carbon isotope
oil and source rock correlation
