【摘要】 塔北中部东河塘—哈拉哈塘—哈得逊地区分布的下石炭统巴楚组东河砂岩段是深埋的海相优质碎屑岩储层。对重矿物的聚类分析以及对稳定系数、ZTR指数、砂岩碎屑组分含量和岩屑类型特征的分析表明,研究区东河砂岩有两个主要物源体系,且物源供给方式不同。根据地震反射特征、碎屑组分平面分布形态及粒度反映的水动力条件等,认为位于研究区西北侧的轮台凸起以浪控三角洲的形式向东河塘—哈拉哈塘地区供给沉积物,而哈得逊地区以正常波浪侵蚀填平补齐的形式供给沉积物,推测在这两个地区的中间区域存在物源混合带。岩心观察描述及测井、录井资料分析证实,不同物源供给体系受波浪强烈改造作用,均发育滨岸沉积,东河塘—哈拉哈塘地区主要发育浪控三角洲改造后的前滨海滩砂,哈得逊地区发育正常浪控前滨砂砾质滩,研究区中部地区发育中上临滨,南部地区发育下临滨—浅海。更多还原

【Abstract】 The "Donghe sandstone" here refers to the Lower Carboniferous Donghe sandstone Member(a member of Bachu Formation),which is the typical deep-buried marine clastic reservoir,distributing in Donghetang,Hanikatam and Hadexun areas in the central part of northern Tarim Basin.The heavy-minerals and rock detrital component methods are used in provenance analysis for Donghe sandstone.Based on the distribution illustrations of clustering sample groups,stability coefficients and ZTR maturity indexes of heavy-minerals,as well as the clastic component content and detrital types of the sandstone,it is indicated that the sediments in Donghe sandstone derived from two predominant provenance systems with different supplying patterns to the study area.According to the seismic reflection features,the plane distribution of detrital components and the grain-size-related hydrodynamic conditions,it is shown that sediments were supplied by the way of wave-dominating delta into Donghetang and Hanikatam from Luntai Uplift on the northwest and by the way of common wave erosion to fill up to lower areas in Hadexun.It is deduced that a mixing zone of both sediments would exist between both of areas.Core descriptions and logging dada analysis have further proved the development of shoreline sedimentary facies from different provenances in the Donghe sandstone areas due to frequent wave reformation.Foreshore sandstone beach subfa cies develops in Donghetang and Hanikatam and foreshore conglomeratic and sandstone beach subfacies is in Hadexun.Mid-upper shoreface subfacies and lower shoreface-neritic subfacies develop respectively in the middle and the south of the study area.更多还原