Abstract: In this paper,the seismic facies and sedimentory facies of the 3rd member of Shahejie Formation in the western Huimin Depression were studied with the data from seismic facies analysis,core analysis,and electric logging analysis.The results show that there are thirteen kinds of seismic facies in the 3rd member of Shahejie Formation,and these seismic facies represent different sedimentary environments and facies.The main types of sedimentary facies may be included in the three categories of sedimentary system,that is,a delta-deep water turbidite fan system,a delta-beach/bar system and a fan-delta system.These systems changed with the evolution of the western Huimin Depression,and are the main locations of sand deposits.In the end of this paper,the favorable oil/gas bearing areas and possible types of oil/gas traps are predicted.

摘要： 本文综合利用钻井、测井和地震资料,对惠民凹陷西部沙三段地震相及沉积相进行了研究。研究结果表明,沙三段共存在五大地震相区十三种地震相,这十三种地震相分别代表着不同的沉积环境和岩相。据沉积体系理论,可将研究区内沙三段主要沉积相类型归结为三种沉积体系,即长轴三角洲-深水浊积扇体系,短轴三角洲-沿岸滩坝体系和扇三角洲体系。它们随盆地的演化既有继承性又有新生性。这三种沉积体系是砂质沉积的主要场所,也是油气聚集的有利地区,中央隆起带和临南斜坡区的三角洲和临南洼陷中的深水浊积扇是今后寻找非背斜油气藏的有利场所。