松辽盆地黒帝庙地区姚一段浅水三角洲沉积特征及沉积演化
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摘要
根据岩心、测井解释、录井资料和地震资料,对姚一段的沉积微相类型、展布特征及其沉积演化规律进行了系统研究,结果表明黒帝庙地区姚一段发育浅水三角洲沉积体系。本次研究建立了浅水三角洲沉积体系的沉积模式,其可划分出浅水三角洲平原、浅水三角洲前缘和前浅水三角洲,根据不同的沉积特征,各亚相可进一步划分为多种沉积微相。与正常三角洲不同的是,浅水三角洲前缘河口沙坝不发育,且在该地区前浅水三角洲地带发育出露湖面的浅滩。
According to core observation,logging data and seismic survey,the sedimentary facies types of the 1st member of Yaojia Formation,distribution and evolution of Heidimiao area were studied systematically.The research showed shallow-water delta facies deposited in the 1st member of Yaojia Formation.The model of the shallow-water delta sedimentary system of the region of interest was established.Shallow-water delta could be divided into shallow-water delta plain,shallow-water delta front and prodelta.Based on the different sedimentary characteristics,different subfacies conld be further divided into a variety of sedimentary facies.Different from normal delta,distributary mouth bar was poorly developed in the shallow-water delta front,and shoal patch develop in the prodelta which exposed the shallow lake.
引文
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