文章简介
沧东次凹渐新统沙河街组三段沉积相分析
  

摘要:本次研究以多门地质学理论为指导,建立岩心相、测井相、地震相图板,并进行耦合识别出扇三角洲、远岸水下扇、湖泊三种沉积相。通过单井相划分,对各井沉积相特征进行认识。进行联井剖面对比,发现凹陷北部从西到东依次发育滩坝-云灰坪-湖泊-滩坝沉积相,南部剖面则显示为扇三角洲-远岸水下扇-湖泊-滩坝沉积相。

关键词:沧东次凹;沙河街组;沉积相

AbstractThis study is guided by multiple geological theories and follows the research method of "point-line-plane". Firstly, the top and bottom interface of sha-3 member is identified by marker bed, and the core facies, log facies and seismic facies chart are established, and the four sedimentary facies, namely fan delta, braided river delta, lake and underwater fan, are identified by coupling.Through the division of single well facies and the comparison of combined well profiles, it is found that there are fan deltas -underwater fans - lakes - beach bars successively from west to east in south subsag and beach bars-dolomitic lime flats-lake-beach bars in north subsag.

Key words: Cangdong Subsag; Shahejie Formation; Sedimentary Facies



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