库车坳陷亚肯北三维地震探区沉积体系域研究

应用层序地层学理论,在层序-体系域格架内对库车坳陷亚肯北三维地震探区侏罗系、白垩系、古近系各地层进行体系域分析对比,建立了层序-体系域格架内的储盖组合和配置体系,对有利储层砂体分布有利区带进行了预测,并研究了体系域沉积与储层分布的相互关系,指出扇三角洲沉积体系中有利储集砂体首选为湖侵体系域内的扇三角洲前缘水下分流河道和河口坝砂体,次之为低位域扇三角洲前缘(平原)分流河道砂体。

Depositional system tract of Yakenbei area in Kuqa depression

Sequence stratigraphy is used for analytical comparison of the sequence-system tracts in Cretaceous and Jurassic strata of Yakenbei area in Kuqa depression.The reservoircaprock assemblage among the sequence-system tracts and its allocation system was established to predict the distribution of favorable reservoir sandstones.The study of the relationship between the depositional system tracts and the reservoir distribution indicate the sand bodies in fan deltafront subaqueous distributary channel and mouth bar of the transgressive systems tracts are favorable reservoir sand bodies,the sand body in fan delta-front subaqueous distributary channel of the low stand systems tracts is secondary favorable reservoir sand body.