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阿瓦提凹陷三叠系地震相特征及有利探区预测
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摘要
利用层序地层学方法,将阿瓦提凹陷三叠系划分为4个三级层序;根据地震相参数,从内部结构和外部形态出发,结合反射连续性、反射振幅、频率等,在地震剖面上共识别出高振高连平行席状地震相、中振中连平行-亚平行席状地震相、中低振低连亚平行地震相、杂乱反射地震相、前积地震相等5种主要的地震相类型,这些地震相在平面上分布部位明确,纵向上具有差异性和继承性,与凹陷结构及构造演化有着良好的对应关系。
Based on sequence stratigraphy method,the Triassic in Awati sag is divided into four Class-III sequences.In view of internal texture and external configuration,integrated with reflection continuity,reflection amplitude and frequency,five types of major seismic facies are distinguished from the seismic profile,such as parallel sheet seismic facies with high amplitude and high continuity,parallel-subparallel sheet facies with medium amplitude and medium continuity,subparallel facies with mid-low amplitude and low continuity,chaotic reflecting facies and progradational facies.These seismic facies assume obvious distribution in plane and differential and successive features in vertical direction,and have good correlations with Awati sag structure and tectonic evolution in Tarim basin.
引文
[1]李思田,潘元林,陆永潮,等.断陷湖盆隐蔽油藏预测及勘探的关键技术——高精度地震探测基础上的层序地层学研究[J].地球科学——中国地质大学学报,2002,27(5):592-598.
    [2]朱筱敏.层序地层学[M].山东东营:石油大学出版社,2000:167-207.
    [3]Miaoo A D.Stratigraphic sequences and their chronostrati-graphic correlation[J].Journel of Sedimentary Petrology,1991,61:497-505.

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