孤北～桩海地区古近系东营组层序划分及特征研究
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摘要
以孤北~桩海地区古近系东营组为研究对象,通过大量的地震剖面解释、测井资料分析、钻井岩芯观察,在研究区东营组岩石学特征分析的基础上,详细研究了层序划分及层序特征,共划分出SQ1、SQ2二个长期旋回,Ed1、Ed2、Ed3、Ed4四个中期旋回。同时,还深入讨论了各层序在地震剖面、钻井剖面及测井曲线上的特征;论述了各层序的发育特征。其中,Ed1层序在全区呈对称分布;Ed2层序主要发育下降半旋回;Ed3层序旋回对称明显,全区均有分布;Ed4层序在研究区内主要发育上升半旋回。通过对该地区层序划分的认识,为该地区的层序对比和层序地层格架的建立等,提供了重要的依据。
In this paper,with the Dongying formation of paleogene tempestites in Gubei-zhuanghai as the research object,based on lots of interpretation of seismic profiles,analysis of well logging,the observation of drilling cores,and the analysis of the petrology characters,the sequence distribution and the characters of the Dongying formation were researched and divided into two III-grade sequences,SQ1 and SQ2,and four intermediate cyclothem,Ed1、Ed2、Ed3、and Ed4.And the characters of the sequences on seismic profiles,drilling profile and well logging were profoundly discussed also.The developed characters of each sequence had also been discussed.The Ed1 sequence develops ascending and falling cycle in this area;the Ed2 sequence mainly develop the falling cycle;and Ed3 sequence develops ascending and falling cycle;the Ed4 sequence mainly develop the ascending cycle.The matching of successions and the establishing of strata sequence formwork had provided significant condition through the understand of the sequence distribution.
In this paper,with the Dongying formation of paleogene tempestites in Gubei-zhuanghai as the research object,based on lots of interpretation of seismic profiles,analysis of well logging,the observation of drilling cores,and the analysis of the petrology characters,the sequence distribution and the characters of the Dongying formation were researched and divided into two III-grade sequences,SQ1 and SQ2,and four intermediate cyclothem,Ed1、Ed2、Ed3、and Ed4.And the characters of the sequences on seismic profiles,drilling profile and well logging were profoundly discussed also.The developed characters of each sequence had also been discussed.The Ed1 sequence develops ascending and falling cycle in this area;the Ed2 sequence mainly develop the falling cycle;and Ed3 sequence develops ascending and falling cycle;the Ed4 sequence mainly develop the ascending cycle.The matching of successions and the establishing of strata sequence formwork had provided significant condition through the understand of the sequence distribution.
引文
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[2]李阳.沉积学研究对济阳断陷湖盆油气勘探开发的推动作用[J].沉积学报,2004,22(3):400.
[3]潘元林,张善文,肖焕钦,等.大型陆相断陷盆地层序地层与隐蔽油气藏研究-以济阳坳陷为例[M].北京:石油工业出版社,2004.
[4]邓宏文.美国层序地层研究中的新学派-高分辨率层序地层学[J].石油与天然气地质,1995,1:38.
[5]鹿洪友.层序地层学应用于陆相湖盆中隐蔽油气藏的成因解释[J].大地构造与成矿学,2004,28(2):209.
[6]国景星.冲积-河流相层序地层模式-以济阳坳陷新近纪为例[J].新疆地质,2003,21(4):393.
[7]冯有良.东营坳陷沙河街组三段层序低位域砂体沉积特征[J].地质论评,2001,47(3):278.
[8]王颖,王英民,赵锡奎,等.洛阳坳陷构造演化对断块型潜山的形成及油气成藏的影响[J].矿物岩石,2004,24(2):73.
[9]郑荣材,吴朝容,叶茂才.浅谈陆相盆地高分辨层序地层学研究思路[J].成都理工学院学报,2000,24(3):241.
[10]方勇.东营三角洲高频层序特征与岩性圈闭分布[J].中国海上油气,2003,17(3);160.
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