【摘要】 通过岩心观察,运用录井、测井、地震及分析化验资料,对查干凹陷苏红图组二段、银根组的沉积相特征进行了描述和分析,确定了其沉积相类型及变化规律。结果表明:苏二段沉积时期,扇三角洲相沉积较发育,主要分布在虎勒断层、图拉格断层和毛西断层附近,砂体多期叠加,延伸距离较近,向凹陷中心方向尖灭;银根组沉积时期发育辨状河相沉积,河道迁移频繁,在平面上展布范围很大。苏红图组二段至银根组早期为查干凹陷的断坳转换期,银根组中后期为全面的坳陷期,随着地形的逐渐平缓,湖盆萎缩,沉积相类型也由先前的扇三角洲、辨状河三角洲和湖泊相沉积过渡为河流相沉积。更多还原

【Abstract】 Based on cores’description,electric log,mud logging,cores’analysis data,seismic survey,etc.,the sedimentary facies’types and their characteristics of the Second number of Suhongtu Formation and Yinggen Formation,Chagan Sag,were studied,as well as their distribution rule.The research showed that the study area was dominated by fan delta facies during the sedimentary period of Second number of Suhongtu Formation,distributed near Hule fault,Tulage fault and Maoxi fault.The sand overlained each other and extend no more distance,and pinchout from the center of the lake.更多还原