准噶尔盆地二叠系构造—地层层序与盆地演化
发布时间：2018-11-16 20:00
【摘要】：二叠纪是准噶尔盆地形成演化的关键变革期,是发展盆地分析理论的天然实验室,该层系油气资源量居各个层系首位,发展前景广阔。因此研究二叠系构造-地层层序,探讨盆地演化历史,对于深入认识准噶尔盆地油气地质条件,开展地区油气资源预测具有重大意义。本论文以层序地层学、构造地质学理论为基础,利用最新的钻测井和地震等资料,建立准噶尔盆地二叠纪地层系统,识别出区域不整合,划分构造-地层层序,并划分盆地演化阶段;在以上研究基础上,按照单井相-连井相-平面相的思路,最终恢复准噶尔盆地二叠系沉积充填演化过程。本次研究取得了以下几点认识:(1)准噶尔盆地二叠系可识别出两个一级区域不整合(C/P和P/T)和一个二级区域不整合(P1/P2),同时在二叠系内部还发育有三个三级构造不整合(P1j/P1f、P2x/P2w和P2w/P3w)。它们的形成主要受控于构造运动。不整合类型主要以削截和上超为主。玛湖凹陷、沙湾凹陷以及中拐凸起是不整合发育的主要构造单元,另外东部隆起各凹陷、中央坳陷莫索湾凸起、东道海子凹陷也有发育。(2)根据准噶尔盆地二叠系6个不整合面的级别,将其划分为中上二叠统和下二叠统两个二级构造层以及佳木河组、风城组、夏子街组、下乌尔禾组和上乌尔禾组5个三级构造层。(3)准噶尔盆地二叠纪沉积充填具有如下特点:西北缘经历了佳木河组火山岩相→风城组扇三角洲平原亚相→夏子街组冲积扇相→下乌尔禾组扇三角洲相;中央坳陷玛湖-沙湾凹陷经历了佳木河组扇三角洲相→风城组-中上二叠统滨浅湖相;中央坳陷东道海子凹陷-阜康凹陷经历了佳木河组浅湖相→风城组扇三角洲相、滨浅湖相→中上二叠统滨浅湖相;准东地区经历了金钩组扇三角洲、冲积扇相→将军庙组扇三角洲相→中上二叠统扇三角洲相、滨浅湖相。早二叠世盆地沉积中心位于西北缘克-夏断阶带,中二叠世位于玛湖凹陷,晚二叠世位于盆一井西凹陷,沉积中心逐渐向南迁移。(4)准噶尔盆地二叠纪构造演化经历了:佳木河组沉积期周缘前陆盆地阶段-风城组沉积期联合前陆盆地阶段-二叠纪中期前陆盆地持续发展阶段-上乌尔禾组沉积期前陆盆地向坳陷盆地转化的前陆盆地消亡阶段。
[Abstract]:Permian is the key transformation period for the formation and evolution of Junggar Basin. It is a natural laboratory for the development of basin analysis theory. Therefore, it is of great significance to study the tectonic-stratigraphic sequence of the Permian system and to explore the evolution history of the basin, which is of great significance for further understanding of the oil and gas geological conditions in Junggar Basin and for the prediction of regional oil and gas resources. Based on the theory of sequence stratigraphy and tectonic geology, using the latest drilling logging and seismic data, this paper establishes the Permian stratigraphic system of Junggar Basin, identifies the regional unconformity, and divides the tectonic-stratigraphic sequence. And divided into basin evolution stages; On the basis of the above research, according to the thought of single well facies, contiguous well facies and plane facies, the evolution process of Permian sedimentary filling in Junggar Basin was finally restored. The results of this study are as follows: (1) the Permian system in Junggar Basin can identify two primary regional unconformities (C / P and P / T) and a secondary regional unconformity (P1/P2). At the same time, there are three tertiary structural unconformities (P1j / P1fP1fP2x / P2w and P2w/P3w) developed within the Permian. Their formation is mainly controlled by tectonic movements. The main types of unconformity are truncation and superposition. Mahu sag, Shawan sag and Zhongguai uplift are the main structural units of unconformity. In addition, each sag in the eastern uplift and Mosuowan uplift in the central depression, (2) according to the grade of 6 unconformities of Permian system in Junggar Basin, it can be divided into two secondary tectonic layers of middle and upper Permian and lower Permian, as well as Jiamuhe formation, Fengcheng formation, Xiazijie formation, etc. (3) the Permian sedimentary filling in Junggar Basin has the following characteristics: the northwestern margin experienced the volcanic facies of the Jiamuhe formation, the fan delta plain subfacies of the Jiamuhe formation and the fan-delta plain subfacies of the Xiaxizi formation. (3) the Permian sedimentary filling in the Junggar Basin is characterized by the following characteristics: The alluvial fan facies of the Street formation and the fan delta facies of the lower Wuerhe formation; The Mahu-Shawan sag in the central depression has experienced the fan delta facies of the Jiamuhe formation, the Fengcheng formation and the shore-shallow lacustrine facies of the middle and upper Permian. The Dongdao Haizi Sag and Fukang Sag of the Central Depression have experienced the fan delta facies of the shallow lake facies of Jiamihe formation and the fan delta facies of the Fengcheng formation and the shallow lake facies of the middle and upper Permian. The area has experienced the fan delta, alluvial fan facies, the fan delta facies of the middle and upper Permian, and the shallow lake facies. The sedimentary center of the early Permian basin is located in the northwestern margin of the Kexia fault terrace, the middle Permian is located in the Mahu sag, and the late Permian is located in the basin Yijingxi sag. (4) the Permian tectonic evolution of Junggar Basin underwent the following stages: the peripheral Foreland basin stage of the Jiamihe formation, the Foreland basin stage of the Fengcheng formation combined with the Foreland basin stage of the middle Permian period, and the middle Permian Foreland basin stage. The stage of sustainable development and the extinction of Foreland basin from Foreland basin to depression basin during the depositional period of Upper Wuerhe formation.
【学位授予单位】：中国地质大学(北京)
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P618.13;P534.46
本文编号：2336499
[Abstract]:Permian is the key transformation period for the formation and evolution of Junggar Basin. It is a natural laboratory for the development of basin analysis theory. Therefore, it is of great significance to study the tectonic-stratigraphic sequence of the Permian system and to explore the evolution history of the basin, which is of great significance for further understanding of the oil and gas geological conditions in Junggar Basin and for the prediction of regional oil and gas resources. Based on the theory of sequence stratigraphy and tectonic geology, using the latest drilling logging and seismic data, this paper establishes the Permian stratigraphic system of Junggar Basin, identifies the regional unconformity, and divides the tectonic-stratigraphic sequence. And divided into basin evolution stages; On the basis of the above research, according to the thought of single well facies, contiguous well facies and plane facies, the evolution process of Permian sedimentary filling in Junggar Basin was finally restored. The results of this study are as follows: (1) the Permian system in Junggar Basin can identify two primary regional unconformities (C / P and P / T) and a secondary regional unconformity (P1/P2). At the same time, there are three tertiary structural unconformities (P1j / P1fP1fP2x / P2w and P2w/P3w) developed within the Permian. Their formation is mainly controlled by tectonic movements. The main types of unconformity are truncation and superposition. Mahu sag, Shawan sag and Zhongguai uplift are the main structural units of unconformity. In addition, each sag in the eastern uplift and Mosuowan uplift in the central depression, (2) according to the grade of 6 unconformities of Permian system in Junggar Basin, it can be divided into two secondary tectonic layers of middle and upper Permian and lower Permian, as well as Jiamuhe formation, Fengcheng formation, Xiazijie formation, etc. (3) the Permian sedimentary filling in Junggar Basin has the following characteristics: the northwestern margin experienced the volcanic facies of the Jiamuhe formation, the fan delta plain subfacies of the Jiamuhe formation and the fan-delta plain subfacies of the Xiaxizi formation. (3) the Permian sedimentary filling in the Junggar Basin is characterized by the following characteristics: The alluvial fan facies of the Street formation and the fan delta facies of the lower Wuerhe formation; The Mahu-Shawan sag in the central depression has experienced the fan delta facies of the Jiamuhe formation, the Fengcheng formation and the shore-shallow lacustrine facies of the middle and upper Permian. The Dongdao Haizi Sag and Fukang Sag of the Central Depression have experienced the fan delta facies of the shallow lake facies of Jiamihe formation and the fan delta facies of the Fengcheng formation and the shallow lake facies of the middle and upper Permian. The area has experienced the fan delta, alluvial fan facies, the fan delta facies of the middle and upper Permian, and the shallow lake facies. The sedimentary center of the early Permian basin is located in the northwestern margin of the Kexia fault terrace, the middle Permian is located in the Mahu sag, and the late Permian is located in the basin Yijingxi sag. (4) the Permian tectonic evolution of Junggar Basin underwent the following stages: the peripheral Foreland basin stage of the Jiamihe formation, the Foreland basin stage of the Fengcheng formation combined with the Foreland basin stage of the middle Permian period, and the middle Permian Foreland basin stage. The stage of sustainable development and the extinction of Foreland basin from Foreland basin to depression basin during the depositional period of Upper Wuerhe formation.
【学位授予单位】：中国地质大学(北京)
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P618.13;P534.46
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