东营凹陷沙四上亚段层序地层格架研究
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摘要
针对东营凹陷沙四上亚段滨浅湖滩坝砂体沉积特征,根据层序地层学理论,在综合分析地震、测井、岩心等资料的基础上,采用地震层序、声波时差和测井曲线叠合等方法进行层序界面识别,建立了东营凹陷沙四上亚段层序地层格架,将沙四上亚段划分为一个三级层序,并根据层序内低位体系域、湖侵体系域及高位体系域发育情况,细分为7个准层序组。
Sequence stratigraphy framework is established for sub-Es4up of Dongying Depression according to the sedimentary characteristics of lacustrine shoal-bar sand body, based on sequence stratigraphy and comprehensive analysis of seismic, logging and coring data. Sequence boundary is identified through seismic sequence, acoustic transit time, and combination of logging curves. The sub-Es4up is classified as a third-order sequence which is subdivided into seven parasequence sets according to the development of lowstand, transgressive and highstand system tracts.
Sequence stratigraphy framework is established for sub-Es4up of Dongying Depression according to the sedimentary characteristics of lacustrine shoal-bar sand body, based on sequence stratigraphy and comprehensive analysis of seismic, logging and coring data. Sequence boundary is identified through seismic sequence, acoustic transit time, and combination of logging curves. The sub-Es4up is classified as a third-order sequence which is subdivided into seven parasequence sets according to the development of lowstand, transgressive and highstand system tracts.
引文
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[2]孙海龙,等.东营凹陷南斜坡沙四段高分辨率层序地层格架研究[J].特种油气藏,2004,11(4):19~22.
[3]Posamentier HW,Vail P R.Eustatic controls on clastic deposition II:Sequence and systems tract models[M].Houston,TX,United States:SEPM Special Publication,1988,42:125~154.
[4]武法东,等.东营凹陷第三纪层序地层格架及沉积体系类型[J].现代地质,1998,12(4):559~566.
[5]田景春,等.东营凹陷沙河街组层序地层及地层格架研究[J].矿物岩石,1994,14(2):37~46.
[6]Mitchum R M,Van Wagoner J C.High frequency se-quences and their stacking patterns:sequence stratigraph-ic evidence of high frequency eustatic cycles[J].Sedi-ment Geol,1991,70(2):131~160.
[7]Vail P R,et al.Seismic stratigraphy and global changes of sea level[A].Seismic Stratigraphy-Applications to Hy-drocarbon Exploration[C].AAPG Memoir26,1977:49~212.
[8]Vail P R.,et al.The stratigraphic signatures of tectonics,eustasy and sedimentology-an overview[A].Cycles and Events in Stratigraphy[C].New York:Springer-Verlag,1991:611~659.
[9]姚益民.东营凹陷下第三系ESR测年研究[J].油气地质与采收率,2002,9(2):31~34.
[10]王卫红,等.测井曲线识别层序边界的方法探讨[J].西南石油学院学报,2003,25(3):1~4.
[11]操应长,等.利用测井资料识别层序地层界面的几种方法[J].石油大学学报(自然科学版),2003,27(2):23~26.
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