渤中21构造区湖底扇成因模式及勘探意义

发布时间：2018-06-24 22:09

本文选题：渤中构造区 + 东二下段　；参考：《东北石油大学学报》2017年03期

【摘要】：为落实渤中21构造东二下段岩性圈闭类型及规模、储量规模,在对渤中21构造区古地貌背景和沉积体系演化模式的耦合分析基础上,通过井震标定、精细地震追踪、宏观地震相组合及多属性分析,与渤海已钻探典型湖底扇特征进行对比。结果表明:气层段为湖底扇型岩性圈闭。渤海湖底扇从成因机制上分为与早期继承性发育坡折带,以及与大型三角洲建造形成的同沉积坡折带密切相关的2种类型。渤中21构造区湖底扇成因与大型三角洲建造形成的同沉积坡折带相关。在成因模式指导下,通过对湖底扇沉积厚度、地震微相特征分析,用地震岩相正演模拟方法对湖底扇富砂区范围进行圈定,落实湖底扇岩性圈闭边界,为渤中21构造区储量计算和勘探评价提供依据,为开展隐蔽油气藏勘探提供有利目标。
[Abstract]:In order to realize the type and scale of lithologic traps and reserve scale in the lower part of the east second member of Bozhong 21 structure, based on the coupling analysis of paleogeomorphology background and sedimentary system evolution model in Bozhong 21 structural area, well earthquakes are calibrated and fine seismic tracing is carried out. The macro seismic facies combination and multi-attribute analysis are compared with the characteristics of typical sublake fan drilled in the Bohai Sea. The results show that the gas reservoir is a sublacustrine fan lithologic trap. The sublacustrine fan in the Bohai Sea can be divided into two types according to its genetic mechanism: early inherited developed slope break zone and synsedimentary slope break belt formed by large delta formation. The origin of sublacustrine fan in Bozhong 21 tectonic area is related to the synsedimentary slope break formed by large delta formation. Under the guidance of genetic model, by analyzing the thickness of sublacustrine fan and the characteristics of seismic microfacies, the sand-rich area of sublacustrine fan is delineated by the method of forward modeling of seismic lithofacies, and the lithologic trap boundary of sublacustrine fan is implemented. It provides the basis for reserves calculation and exploration evaluation in Bozhong 21 structural area, and provides a favorable target for the exploration of subtle oil and gas reservoirs.
【作者单位】：中海石油(中国)有限公司天津分公司渤海石油研究院;
【基金】：国家科技重大专项(2016ZX05024-003)
【分类号】：P618.13

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