琼东南盆地古近系陵水组层序地层特征
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张亚雄,男,在读博士研究生,从事沉积学方面的研究。联系电话:13811307471,E-mail:157498674@qq.com。

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Sequence characteristics of Paleocene Lingshui formation in Qiongdongnan basin,south China Sea
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    摘要:

    综合地震、钻井和测井资料分析,利用层序地层学、沉积学和石油地质学原理和方法,对琼东南盆地古近系陵水组进行层序地层划分,建立了三维等时层序地层格架,并在此基础上系统分析各层序的展布特征。结果表明,琼东南盆地陵水组自下而上可划分为层序Ⅰ、层序Ⅱ、层序Ⅲ、层序Ⅳ共4个三级层序,4个层序在纵向上发育与演化具有明显的继承性与旋回性。层序发育受构造运动与海平面升降的控制,在层序Ⅰ—层序Ⅳ沉积时期,海盆沉积面积逐渐加大,地层厚度与展布明显受断裂位置与走向控制,具有北部隆起带地层厚度较小而中央坳陷带地层厚度较大,靠近断裂地层厚度大而远离断裂地层厚度小的特征,其沉积中心在纵向上的演化具有由东北部向南部迁移再向东北部迁移的特征。

    Abstract:

    Integrated with analysis of seismic data, drilling data and logging data, this paper divided the Paleocene Lingshui formation into four third order sequence and established the sequence framework of Paleocene Lingshui formation in Qiongdongnan basin by using the principle and methods of sequence stratigraphy, sedimentology and petroleum geology. On the basis of the sequence framework,we analyzed the spatial distribution characteristics of each sequence. The results indicate that the development and evolution of the four sequences are characterized with inheritance and cyclicity in vertical. The depocenter which was in the northwest in the early stage moved to the south later. And, it was in the northwest again in the late stage. The deposition range of the basin varied during different stages. Different sag is of different deposition evolution feature. The distribution of the sequence is mainly controlled by the depocenter.Tectonic activity obviously controls the distribution of sedimentary strata. The thickness of the sequence is thick near the boundary fault in the each sag and becomes thinner in the gentle slope. Tectonic and sea level are the main factors controlling the development of the sequence.

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张亚雄,朱筱敏,张功成,陈欢庆.琼东南盆地古近系陵水组层序地层特征[J].油气地质与采收率,2013,20(5):33~37

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  • 在线发布日期: 2015-09-06