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哈萨克斯坦南图尔盖盆地受区域构造的影响,侏罗系沉积储层发育演化与构造活动密切相关。在地震、测井及岩芯等资料综合分析的基础上,通过层序地层以及沉积相分析,对南图尔盖盆地A探区萨雷布拉克侏罗系沉积层序特征及其影响因素进行了研究。研究表明:1)南图尔盖盆地A探区侏罗系和白垩系经历了3次较为明显的构造运动,可将研究区的构造演化划分为3个重要阶段:断陷期、断坳转换期及坳陷期,形成了3个二级层序,在二级层序格架内将侏罗系划分7个三级层序;2)早侏罗世断陷期(SQ1、SQ2)主要发育湖泊及辫状河三角洲沉积体系,中侏罗世断坳转换期(SQ3、SQ4)主要发育湖泊及三角洲沉积体系,晚侏罗世坳陷期(SQ5、SQ6、SQ7)主要发育湖泊、三角洲及河流沉积体系;3)通过对研究区沉积层序发育演化影响因素的研究,认为断陷—坳陷的构造演化对沉积层序的发育演化起主要的控制作用。
Affected by the regional tectonics in the South Turgai Basin in Kazakhstan, the development and evolution of the Jurassic sedimentary reservoirs are closely related to tectonic activities. Based on the comprehensive analysis of seismic data, logging data and core data, the sequence stratigraphy and sedimentary facies analysis are used to analyze the sedimentary sequence and its influencing factors of the Sarebulak Jurassic in Area A of the South Tureg basin Study. The results show that: 1) The Jurassic and Cretaceous of the A prospecting area in the South TUERGE basin experienced three obvious tectonic movements, which can be divided into three important stages: tectonic evolution, fault depression and transition Period and depression, three second-order sequences are formed, and the Jurassic is divided into seven third-order sequences in the second-order sequence framework. (2) The main Jurassic rift periods (SQ1 and SQ2) Lacustrine and braided river delta sedimentary system. Middle Jurassic depression depression transition (SQ3, SQ4) mainly develops lacustrine and deltaic depositional systems. Late Jurassic depression (SQ5, SQ6, SQ7) mainly develops lakes and deltas And river sedimentary system. (3) Through the study of the influencing factors of the sedimentary sequence evolution in the study area, it is believed that the tectonic evolution of the fault depression-depression plays a major role in the control of the evolution of the sedimentary sequence.