【摘要】 惠州凹陷深层古近系文昌组(Ew)处于勘探初期,钻井资料稀少,因此通过对惠州凹陷A井区A-1井古近系文昌组NA油组(EwNA)的岩性统计及钻井取心的沉积构造进行观察,证实了该井钻遇的EwNA主要发育辫状河三角洲沉积,在此基础上对该地区地震相进行研究,识别出了楔状地震相、平行-亚平行席状地震相、前积地震相及下凹充填地震相;并将地震相转化为沉积相,划分出辫状河三角洲平原、辫状河三角洲前缘、扇三角洲及滨浅湖相,确定了沉积相在平面上的分布范围,为该地区Ew地层以后的勘探工作奠定了坚实的基础。更多还原

【Abstract】 The Paleogene Wenchang Formation of Huizhou Sag was at the early exploration stage,there were little drilling data.By analyzing the lithology and core sedimentary structure from Well A-1 in Wellblock A,it was proven that braided river delta deposits were mainly developed in the well.On the basis stated,it is found out that the seismic facies includes wedge-shaped seismic facies,parallel-subparallel seismic facies,foreset seismic facies and concave filling seismic facies.The sedimentary facies include braided river delta plain sub-facies,braided river delta front sub-facies,fan delta facies,shallow lake and shore facies.It provides a solid base for the seismic exploration of the Paleogene Wenchang Formation in the area.更多还原