惠州凹陷A井区地震相特征及沉积相研究——以古近系文昌组NA油组为例
|
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。
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.
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.
引文
[1]沈守文,彭大钧.SB地区西山窑组上部地震相与沉积相分析[J].西南石油学院学报,1999,21(3):32～36.
[2]徐怀大,王世凤,陈开远.地震地层学解释基础[M].武汉:中国地质大学出版社,1990.
[3]陈长民,施和生.珠江口盆地(东部)第三系油气藏形成条件[M].北京:科学出版社,2002.
[4]龙更生,施和生.珠江口盆地惠州地区中新统地层岩性圈闭形成条件分析[J].中国海上油气,2006,18(4):229～235.
[5]林壬子,张金亮.陆相储层沉积学进展[M].北京:石油工业出版社,1996.
[6]王良忱,张金亮.沉积环境和沉积相[M].北京:石油工业出版社,1996.
[7]周建林.东营凹陷利津洼陷北部沙三段地震相类型及其展布特征研究[J].石油天然气学报,2010,32(4):67～70.
[2]徐怀大,王世凤,陈开远.地震地层学解释基础[M].武汉:中国地质大学出版社,1990.
[3]陈长民,施和生.珠江口盆地(东部)第三系油气藏形成条件[M].北京:科学出版社,2002.
[4]龙更生,施和生.珠江口盆地惠州地区中新统地层岩性圈闭形成条件分析[J].中国海上油气,2006,18(4):229～235.
[5]林壬子,张金亮.陆相储层沉积学进展[M].北京:石油工业出版社,1996.
[6]王良忱,张金亮.沉积环境和沉积相[M].北京:石油工业出版社,1996.
[7]周建林.东营凹陷利津洼陷北部沙三段地震相类型及其展布特征研究[J].石油天然气学报,2010,32(4):67～70.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心