吐哈盆地天然气勘探潜力分析

吐哈盆地位于世界著名的巨型天然气聚集区特提斯构造域北缘盆地群东部.通过与库车坳陷的油气地质条件对比研究认为,吐哈盆地具备形成大中型天然气富集区带的地质条件.根据前陆盆地油气分布规律,认为围绕吐哈盆地吐鲁番坳陷的丘东-小草湖、胜北、托克逊3个生气中心区和坳陷北部山前冲断构造带、前陆坳陷斜坡坡折带、南部前陆隆起带,是大中型天然气富集区带的有利勘探方向.指出吐哈盆地下部组合发育的上二叠统湖相泥岩和石炭系的海相烃源岩,是可能的大型天然气成藏领域.初步预测吐哈盆地煤层气资源雄厚,勘探潜力大. 

Analysis on exploration potential of natural gas in the Turpan-Hami Basin

The Turpan-Hami Basin locates in the northern basin group of the northern world famous Tethyan tectonic domain,which is a huge natural gas accumulation area.By comparison with petroleum geological condition of the Kuqa Depression in the Tarim Basin,it is believed that Turpan-Hami Basin possesses the geological condition of forming large-medium gas enrichment zone.According to gas distribution rules in foreland basin,it is thought that surrounding Turpan-Hami Basin,the three gas generation centers of Qiudong-Xiaocaohu,Shengbei,and Tuokexun in Turpan Depression,foreland thrust structural zone in the northern depression,slope br eak zone of foreland depression,and southern foreland uplift zone are favorable exploration direction for large-medium natural gas enrichment zone.It points out in this paper that lacustrine mudstone of Upper Permian and marine source rock of Carboniferous developed in the lower assemblage of Turpan-Hami Basin,are the possible large natural gas reservoir areas.It also preliminarily predicts that Turpan-Hami Basin is with rich CBM resources,and great exploration potential.