吐哈盆地北部山前带西段地质结构分析与油气远景预测
Analysis on geologic framework and hydrocarbon potential prediction of west mountain front in northern Tuha basin
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摘要: 吐哈盆地北部山前带西段,地质结构处于吐哈北部博格达前陆盆地冲断带西段,是盆地内结构最复杂、油气最为富集的区域。近年勘探研究工作逐渐深化冲断带的结构认识,该区整体具有南北分带、东西分段地质结构特征,由南往北发育;同时结合石油地质条件基础评价,该区紧邻生油凹陷,油气成藏以喜山期成藏为主,圈闭和储层是该区成藏关键因素,由此指出下步油气勘探方向。Abstract: The west mountain front in northern Tuha basin,loca- ted at the west thrust strip of Bogeda foreland basin in the north Tuha area,is of the most complicated structure and the most concentrated hydrocarbon resources within the ba- sin.Recent studies on the structure of thrust strip show that the tectonic structure is characterized by the zonation from south to north and the segmentation from east to west.Eval- uation on the basic factors of petroleum geology suggests that the area is closely near to the source sag,the hydrocar- bon pool is formed mainly in the Himalayan period,and the trap and the reservoir are the key factors of pool forming; hence the future target area for hydrocarbon exploration is presented.