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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
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摘要
通过对东营凹陷利津洼陷北部地质、地震和测井资料综合分析,应用层序地层学理论,建立了沙三中、下亚段层序地层格架。研究认为,该层段可划分为3个三级层序,其中SQ1、SQ2对应沙三下亚段,SQ3对应沙三中亚段;分析了地震相类型及其展布特点,沙三段地震相主要包括前积地震相(主要发育在SQ1中)、楔状地震相(主要沿陡坡带分布)、杂乱地震相(在陡坡带发育,分布范围自下而上逐渐变小)、透镜状地震相以及平行-亚平行地震相和充填地震相(发育在半深湖-深湖区)。
By analyzing the geological,seismic and well logging data,the sequence stratigraphic framework of middle and lower submembers of Es3 was established by using the theory of sequence stratigraphy.Study shows that the middle and lower submembers of Es3 could be divided into 3 third-order sequences: SQ1,SQ2 and SQ.SQ1 and SQ2 were corresponded to the lower submember,and SQ3 was corresponded to the middle submember of Es3.The type and distribution characteristics of the seismic facies are analyzed,it is found out that the seismic facies includes foreset seismic facies(mainly developed in SQ1),wedge-shaped seismic facies(mainly developed along the steep slope belt),chaotic seismic facies(mainly developed in the steep slope belt,and its distribution reducing upwards),lens seismic facies,parallel-subparallel seismic facies and filling seismic facies(developed in hemi deep lake-deep lake environments).
引文
[1]李丕龙,姜在兴,马在平.东营凹陷储集体与油气分布[M].北京:石油工业出版社,2000.81~111.
    [2]李明刚,庞雄奇,漆家福,等.东营凹陷砂岩岩性油气藏分布特征及成藏模式[J].油气地质与采收率,2008,15(2):13~15.
    [3]张德武,冯有良,邱以钢,等.东营凹陷下第三系层序地层研究与隐蔽油气藏预测[J].沉积学报,2004,22(1):67~72.
    [4]姜在兴,李华启.层序地层学原理及应用[M].北京:石油工业出版社,1996.5~29.
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    [6]宋国奇.济阳坳陷下第三系层序地层学分析[J].现代地质,1993,7(1):20~30.

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