阿尔伯特凹陷KF油田原油地球化学特征及来源

阿尔伯特凹陷KF油田原油来源尚没有清晰认识。通过分析油田原油轻烃、饱和烃和芳烃等地球化学特征,对该油田原油来源及成因做了探讨。结果表明,KF油田原油为生烃高峰初期的产物,主要来自弱氧化-还原沉积环境的湖相烃源岩,有机质以Ⅰ~Ⅱ为主;在阿尔伯特凹陷上中新统烃源岩段是区域主力烃源岩。阿尔伯特凹陷上中新统烃源岩的证实说明东非裂谷西支新生代裂谷有广阔的油气勘探前景。

Characteristics and formation mechanism of high wax crude in KF Oilfield

KF oilfield have typically high wax content characteristic. In this study, 21 samples of crude oil of KF oilfield were analyzed by using the GC/GC-MC in order to clarify the origin and source of hydrocarbon in the Albert sag. Light hydrocarbon, saturated hydrocarbon and aromatic provided information on the depositional environment of the source rock and source input. The results indicate that crude oil comes from lacustrine source rock with early generation peak and weak oxidation to reduction depositional environment. Base on oil- rock relation, Miocene formation is main source rock for discovered reserves. The young rifts in Cenozoic of west branch in East Africa rift have great exploration potential due to confirmed of source rock of Upper Miocene in Albert sag