吐哈盆地柯柯亚地区致密砂岩沉积特征

摘要

It concludes that the coal environment of this area is mainly developed to the flood plain swamp and bay swamp by careful observation of typical core wells and analysis on characteristics of sedimentary system of Lower Jurassic combined with logging data and geological background.The braided delta is the main sedimentary facies zone,the thick layer of massive sandstone is developed with the coal source rock layer interactively as the“sandwich”structure.%通过对研究区典型岩心井观察描述，结合测井资料和地质背景等资料分析，以及通过对研究区下侏罗统沉积体系展布特征分析，研究区成煤环境普遍，主要以流河相泛滥平原沼泽和滨湖湖湾沼泽微相为主。沉积相带为辫状河三角洲相，河流厚层块状砂岩与煤系源岩互层，呈“三明治”结构互相叠置。