An analysis of oil source in the Kebai fault zone,the Junggar Basin

Jiang Xiangqiang; Liu Guangdi; Gao Gang; Yang Haifeng

doi:10.11743/ogg20090613

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An analysis of oil source in the Kebai fault zone,the Junggar Basin
Vol. 30, Issue 6, Pages: 754-761(2009)
Online First：25 December 2009，

Published：2009
DOI： 10.11743/ogg20090613
稿件说明：

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DOI：

Jiang Xiangqiang, Liu Guangdi, Gao Gang, et al. An analysis of oil source in the Kebai fault zone,the Junggar Basin[J]. 2009, 30(6): 754-761. DOI： 10.11743/ogg20090613.

摘要

克百断裂带是准噶尔盆地油气聚集最为丰富的地区

其油源一直是悬而未决的问题。百克断裂带原油凝固点相对较低

饱和烃含量和含蜡量相对较低;原油根据生物标志化合物特征划分为A类和B类

不同类型原油的分布具有明显的分带性。结合原油地化指标对原油运移方向的指示作用

经分析认为本区的主要油源是克百断裂逆掩的风成组烃源岩

断裂带地层的展布也证实了此观点。综合克百断裂的分段封闭性和油源分析成果

总结出了本区"山下供油

断裂控油"的油气成藏模式

并预测了新的勘探领域

以指导新一轮的油气勘探。

Abstract

The Kebai fault zone is one of most prolific areas in Junggar Basin.But its oil source is still poorly understood.Crude samples from the area feature in relatively low solidifying point and low content of saturation hydrocarbon and wax.The samples can be classified into type A and type B according to their biomarker characteristics.The distribution of different types of samples presents a clear zonation.According to the oil migration direction indicated by the geochemical index of crude samples

it is believed that the oil is mainly sourced from the source rocks in the overthrust Fengcheng Formation—a conclusion verified by the spatial distribution of strata in the zone.The pooling pattern in the area is also summarized and future exploration targets are predicted in the paper.