【摘要】 首次以准东煤田东部煤矿勘查区为主要研究对象,以钻井岩心描述资料、地震和测井资料为基础,运用层序地层学、煤田地质学和沉积学等相关理论和技术方法,建立了准东煤田东部层序地层格架,重点研究了中侏罗统西山窑组层序地层特征,探讨了聚煤作用和聚煤规律.研究区内侏罗系可划分为两个二级层序和6个三级层序,西山窑组可划分为一个完整的三级层序,6个准层序组(4级)和19个准层序(5级).层序地层研究表明,西山窑组可采煤层主要发育于湖扩体系域(TST)末期和高位体系域(HST)早期,该时期较快的可容纳空间增加速率和较快的泥碳堆积速率间相平衡,有利于厚煤层的聚集.更多还原

【Abstract】 It is the first time to study the east of zhundong coal field.Based on the information from the drilling cores,well logs and sesmic cross sections,applying the theories and methods of sequence stratigraphy,coal geology and sedimentology,the sequence stratigraphic framwork,depositional systems and coal facies of Xishanyao Formation in the Zhundong coal field are analysed.On the Basis of the conprehensive analysis above,the sequence stratigraphic framework of Xishanyao Formation is established,the types and evolution of depositional systems are discussed in detailed;Finally,the controlling factors of coal-accumulation and the distribution of thick coal seams are analysed.The Jurassic strata can be divided into two second-order sequences and six third-order sequences.The objective interval Xishanyao Formation is a complete third-order sequence,and can be divided into six Parasequence sets(forth-order) and nineteen Parasequence(fifth-order).By sequence stratigraphic analysis,coal seams with great significance in Xishanyao Formation were formed at the late lake expansion systems tract(EST)and the early highstand system tract(HST),when the rate in creation of accommodation kept balance with peat accumulation rate.更多还原