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应用高分辨层序地层学分析的原理和方法,通过地震反射剖面和测井等资料的综合分析,揭示了盆地内部各级层序界面,建立了乌里亚斯太断陷盆地的层序地层格架。通过盆地的充填记录、构造特征和盆地的沉降史等信息,论证了该盆地经历了不同级别构造事件控制下的幕式演化过程。幕式构造运动是盆地内高级别层序发育的主控因素,与盆地的沉积充填具有良好的响应关系。一个裂陷期与盆地内部的一级层序相对应,并控制了盆地原型的构成;一个裂陷期内不同的裂陷幕控制了盆地原型内二级构造层序的发育;而三级层序的发育受控于低级的幕式伸展事件。此外,文章还通过层序内部结构分析,阐述了该湖盆体系域的构成模式。
Based on the principle and method of high resolution sequence stratigraphy analysis, through comprehensive analysis of seismic reflection profile and well logging data, the sequence boundaries of various levels in the basin are revealed and the sequence stratigraphy of the Uriyas too fault basin is established Grid. Based on the information of filling records, tectonic features and basin subsidence history in the basin, it is demonstrated that the basin underwent different episodes of evolution under the control of tectonic events. The episodic tectonic movement is the main controlling factor for the high-level sequence development in the basin and has a good response relationship with the sedimentary filling of the basin. A rift period corresponded to the first-order sequence within the basin and controlled the composition of the prototype of the basin. Different rift curtains during the rifting period controlled the development of the secondary tectonic sequence within the prototype of the basin. The development of sequence is controlled by the low-level curtain stretching event. In addition, through the analysis of the internal structure of the sequence, the article expounds the formation pattern of the lacustrine system tract.