准噶尔盆地西北缘断裂带油气分布特征及控制因素

Controlling Factors and Characteristic of Petroleum Occurrence in Fault Belt in Northwestern Margin of Junggar Basin

根据地化指标和测井资料 ,并结合前人的研究成果 ,剖析了准噶尔盆地西北缘断裂带的油气分布特征及断裂带对油气分布的影响因素。研究表明 ,该区断裂带的油气分布具有特殊性 ,其油气分布不仅受断裂活动的控制 ,同时还受断裂带岩性的控制。在断裂活动期 ,碎屑岩和火山岩断裂带都可以作为油气运移的通道 ,在断裂平静期 ,火山岩断裂带可以作为油气运移的通道 ,碎屑岩断裂带对油气起封闭作用。

According to the geochemistry index and logging data,and based on the previous research achievement,controlling factors and characteristic of petroleum occurrence in fault belt in northwestern margin of Junggar basin are taken apart.The results show that petroleum occurrence has particularity.And it is controlled by the fault activities and rock's physical properties in fault belt.During the fault activities,the clastic rocks in fault belt and the volcanic rocks are the migration path.During the quiet period of fault activities,the clastic rock in fault belt obturated the petroleum,and the volcanic rock is still the migration path.