冀中坳陷典型斜坡带构造特征研究

发布时间：2018-01-06 16:40

本文关键词：冀中坳陷典型斜坡带构造特征研究　出处：《中国石油大学(华东)》2015年硕士论文　论文类型：学位论文

【摘要】：斜坡带是指陆相断陷盆地的箕状凹陷中深凹陷带向凸起过渡的地带,是以斜坡形式与相邻凸起和洼陷相连的单斜带。它对深化研究成盆机制、构造演化过程具有重要意义,为油气勘探提供理论指导。本文在区域地质背景、三维地震资料、构造顶面资料、录井、测井等资料的综合分析的基础上,主要对冀中坳陷典型斜坡带的几何学、运动学和动力学特征进行了研究。通过三维地震资料和区域地质特征分析,以及对每个斜坡带内断裂平面和剖面特征的分析和对比,重新对斜坡带进行分类;通过计算伸展量、伸展率、伸展速率以及平衡剖面回剥技术,恢复了冀中坳陷典型斜坡带的形成和演化过程,并进行对比和分析,建立了冀中坳陷典型斜坡带与断层的时空关系;最后结合冀中坳陷的深部构造背景以及构造物理模拟实验结果,明确每个斜坡带的形成机制及差异。研究表明:冀中坳陷典型斜坡带为文安斜坡、蠡县斜坡和束鹿西斜坡,文安斜坡为宽缓型沉积斜坡,蠡县斜坡为平台型沉积斜坡,束鹿西斜坡为窄陡型沉积—构造复合斜坡。在区域伸展、凹陷构造差异、古基底构造形态等多种因素的影响下,三个斜坡均以NE-NNE向断裂体系为主,该体系规模大,发育时间长,控制了古近系地层的沉积;发育NW向或者近EW向断层,主要起调节作用。恢复了冀中坳陷新生代各时期斜坡带的构造演化,确定了各斜坡带均为新生代开始发育,其中文安斜坡的剧烈发育时期为沙三—沙二期,蠡县斜坡和束鹿西的剧烈发育时期为沙一期。冀中坳陷的深部构造背景以及构造物理模拟实验结果表明,边界断层及主要二级断层是斜坡带形成的主控因素,基底结构以及凹陷的发育对斜坡带的形成有重要影响。
[Abstract]:Slope zone refers to the transition zone from middle deep depression to uplift in the half-graben depression of continental faulted basin. It is a monocline zone connected with adjacent protrusions and depressions in the form of slopes. It is helpful to further study the mechanism of basin formation. The process of tectonic evolution is of great significance and provides theoretical guidance for oil and gas exploration. This paper is based on the comprehensive analysis of regional geological background, 3D seismic data, structural roof data, logging, logging and other data. The geometric, kinematic and dynamic characteristics of typical slope zones in Jizhong Depression are studied. Three dimensional seismic data and regional geological characteristics are analyzed. The characteristics of fault plane and section in each slope zone are analyzed and compared, and the slope zone is reclassified. The formation and evolution process of typical slope zone in Jizhong depression is restored by calculating the amount of extension, extension rate, extensional rate and balanced section stripping technique, and the correlation and analysis are also carried out. The spatiotemporal relationship between the typical slope zone and fault in Jizhong depression is established. Finally, the formation mechanism and difference of each slope zone are clarified by combining the deep tectonic background and structural physical simulation results of Jizhong depression. The results show that the typical slope belt in Jizhong depression is Wenan slope. Lixian slope and Shoulu west slope, Wenan slope is wide slow sedimentary slope, Lixian slope is platform sedimentary slope, and Shulu west slope is narrow steep sedimentation-structural composite slope. Under the influence of paleo-basement structure and other factors, the three slopes are dominated by NE-NNE fault system, which has a large scale and a long development time, which controls the deposition of Paleogene strata. NW trending fault or near EW fault is developed, which plays a major role in regulating. The tectonic evolution of the slope zone in the Cenozoic period of Jizhong Depression has been restored, and it has been determined that each slope zone began to develop in the Cenozoic era. The violent development period of Wenan slope is the second stage of Sha Sansha period, and that of Lixian slope and Shoulu west is the first stage of sand. The deep tectonic setting of Jizhong depression and the result of structural physical simulation show that. Boundary faults and main secondary faults are the main controlling factors for the formation of the slope belt. The basement structure and the development of the sag have an important influence on the formation of the slope belt.
【学位授予单位】：中国石油大学(华东)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13;P542

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