台南凹陷构造演化及其对油气成藏的控制作用
发布时间：2018-09-17 10:01
【摘要】：吐哈盆地是中国西部重要的含油气盆地之一,也是典型的多旋回叠合盆地,加之盆地夹持于北部博格达山和南部觉罗塔格山之间,构造应力场复杂,不同地质历史时期构造特征迥异,对不同时期油藏形成产生了重要影响。台南凹陷作为吐哈盆地内部的一个构造单元,二叠系和三叠系是吐哈盆地油气勘探的重要领域,正确认识台南凹陷构造演化及其对油气藏形成的控制作用,对于指导台南凹陷二叠系和三叠系油气勘探具有重要意义。针对台南凹陷内发育火焰山断裂致使下盘构造情况不明、地震品质差等特点,应用断层相关褶皱理论指导断裂精细解释,建立了火焰山断裂下盘三重断裂组合的地质模型。识别出台南凹陷发育火焰山基底断裂带、鲁南断裂带、鲁北断裂带和库北断裂带几条大规模断裂,将台南凹陷分隔形成火北斜坡带、火焰山断阶带(玉北)、火焰山断垒带、火焰山断阶带(英也尔构造带)、鲁克沁断垒带、鲁克沁断阶带、鲁南斜坡带和库木断垒带(库木凸起)八个构造单元。由编制构造演化剖面可以看出台南凹陷经历5期构造演化阶段,即早-中二叠世断陷阶段、晚二叠世逆冲反转阶段、三叠纪强烈逆冲褶皱阶段、侏罗纪-中新统平稳沉降阶段和上新统-现今的调整改造阶段。应用古构造恢复技术,对台南凹陷油气成藏期二叠系、三叠系古构造进行了恢复,得到构造演化对台南凹陷二叠系和三叠系油藏形成的控制作用主要有三方面:①在沉积期古构造控制了沉积体系的分布,早中二叠世台南凹陷表现为西高东低,库木凸起附近为深湖环境,物源方向来自西部、北部。晚二叠世进入逆冲反转阶段,库木凸起开始隆升,东高西低,以东南物源为主;②成藏期之前的古构造为油在台南凹陷聚集成藏提供了有利的圈闭条件。主要断裂带与多期不整合是圈闭形成的重要背景,在鲁克沁断垒带形成了背冲背斜圈闭。火焰山基底断裂、鲁北和库北断裂下盘形成反向断层遮挡圈闭。火焰山断垒带发育背斜-不整合遮挡复合圈闭;③成藏期古构造控制了油侧向运移的优势通道。砂岩输导层是台南凹陷的主要输导通道,二叠系发育的7条近南北向古构造脊沟通台北凹陷源岩区与台南凹陷,控制了油长距离侧向运移的优势通道,三叠系2条古构造脊在鲁克沁断垒带发育,为油在调整后进入三叠系继续运移提供优势通道。
[Abstract]:The Turpan-Hami Basin is one of the important petroliferous basins in western China, and is also a typical polycyclic superimposed basin. In addition, the basin is located between the northern Bogda Mountains and the southern Jolotag Mountains, so the tectonic stress field is complex. The structural characteristics of different geological historical periods are very different, which have an important influence on the formation of oil reservoirs in different periods. As a structural unit in the Turpan-Hami Basin, the Permian and Triassic systems are important fields for oil and gas exploration in the Turpan-Hami Basin. The tectonic evolution of the Tainan Sag and its controlling effect on the formation of oil and gas reservoirs are correctly understood. It is of great significance to guide the exploration of Permian and Triassic oil and gas in Tainan sag. In view of the characteristics of Huoyanshan fault developed in Tainan sag, such as unclear structure and poor seismic quality, a geological model of triple fault assemblage of Huoyanshan fault is established by using fault related fold theory to guide the fine interpretation of the fault. Several large-scale faults have been identified in the Huoyanshan basement fault zone, the southern Shandong fault zone, the northern Shandong fault zone and the Kubei fault zone in the Tainan sag. The Tainan sag is separated into the Huo Bei slope zone, the Huoshan fault terrace zone (Yubei), and the Huoyanshan fault barrier zone. Huojianshan fault terrace (Yingyir tectonic belt), Lukeqin fault barrier, Lukeqin fault terrace, southern Shandong slope and Kumu fault barrier (Kumu uplift) are eight tectonic units. From the compilation of tectonic evolution profiles, it can be seen that the Tainan Sag has undergone five stages of tectonic evolution, namely, the early and Middle Permian faulting stage, the late Permian thrust inversion stage, and the Triassic strong thrust fold stage. Jurassic-Miocene stable subsidence stage and Pliocene-present stage of adjustment and transformation. Using paleotectonic restoration technique, the Permian and Triassic paleotectonics in the hydrocarbon accumulation period in Tainan sag have been restored. It is concluded that the tectonic evolution controlled the formation of Permian and Triassic reservoirs in Tainan sag mainly in three aspects: 1. The paleotectonics controlled the distribution of sedimentary system during the sedimentary period, and the early and middle Permian Tainan sag was characterized as low in the west, high in the east and low in the east. The protruding area is deep lake environment, and the source direction comes from the west and north. In the late Permian period, the uplift of the Kumu uplift began to rise, and the east was high and the west was low. The paleotectonics, mainly from the southeastern provenance, provided favorable trap conditions for oil accumulation in Tainan sag. The main fault zone and multi-stage unconformity are the important background of trap formation, and the backthrust anticline trap is formed in Lukeqin fault barrier belt. Huoyanshan basement fault, north Shandong and northern Shandong fault footwall form reverse fault to block trap. The paleotectonics in Huoyanshan fault barrier zone controlled the dominant channel of lateral migration of oil. The sandstone transport layer is the main channel of the Tainan sag. There are 7 Paleotectonic ridges in the Permian system connecting the source rock area of Taipei Sag and Tainan Sag, which control the dominant channel of long distance lateral migration of oil. Two paleotectonic ridges of Triassic developed in Lukeqin fault barrier belt, which provides an advantage channel for oil to continue to migrate into Triassic after adjustment.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13
本文编号：2245518
[Abstract]:The Turpan-Hami Basin is one of the important petroliferous basins in western China, and is also a typical polycyclic superimposed basin. In addition, the basin is located between the northern Bogda Mountains and the southern Jolotag Mountains, so the tectonic stress field is complex. The structural characteristics of different geological historical periods are very different, which have an important influence on the formation of oil reservoirs in different periods. As a structural unit in the Turpan-Hami Basin, the Permian and Triassic systems are important fields for oil and gas exploration in the Turpan-Hami Basin. The tectonic evolution of the Tainan Sag and its controlling effect on the formation of oil and gas reservoirs are correctly understood. It is of great significance to guide the exploration of Permian and Triassic oil and gas in Tainan sag. In view of the characteristics of Huoyanshan fault developed in Tainan sag, such as unclear structure and poor seismic quality, a geological model of triple fault assemblage of Huoyanshan fault is established by using fault related fold theory to guide the fine interpretation of the fault. Several large-scale faults have been identified in the Huoyanshan basement fault zone, the southern Shandong fault zone, the northern Shandong fault zone and the Kubei fault zone in the Tainan sag. The Tainan sag is separated into the Huo Bei slope zone, the Huoshan fault terrace zone (Yubei), and the Huoyanshan fault barrier zone. Huojianshan fault terrace (Yingyir tectonic belt), Lukeqin fault barrier, Lukeqin fault terrace, southern Shandong slope and Kumu fault barrier (Kumu uplift) are eight tectonic units. From the compilation of tectonic evolution profiles, it can be seen that the Tainan Sag has undergone five stages of tectonic evolution, namely, the early and Middle Permian faulting stage, the late Permian thrust inversion stage, and the Triassic strong thrust fold stage. Jurassic-Miocene stable subsidence stage and Pliocene-present stage of adjustment and transformation. Using paleotectonic restoration technique, the Permian and Triassic paleotectonics in the hydrocarbon accumulation period in Tainan sag have been restored. It is concluded that the tectonic evolution controlled the formation of Permian and Triassic reservoirs in Tainan sag mainly in three aspects: 1. The paleotectonics controlled the distribution of sedimentary system during the sedimentary period, and the early and middle Permian Tainan sag was characterized as low in the west, high in the east and low in the east. The protruding area is deep lake environment, and the source direction comes from the west and north. In the late Permian period, the uplift of the Kumu uplift began to rise, and the east was high and the west was low. The paleotectonics, mainly from the southeastern provenance, provided favorable trap conditions for oil accumulation in Tainan sag. The main fault zone and multi-stage unconformity are the important background of trap formation, and the backthrust anticline trap is formed in Lukeqin fault barrier belt. Huoyanshan basement fault, north Shandong and northern Shandong fault footwall form reverse fault to block trap. The paleotectonics in Huoyanshan fault barrier zone controlled the dominant channel of lateral migration of oil. The sandstone transport layer is the main channel of the Tainan sag. There are 7 Paleotectonic ridges in the Permian system connecting the source rock area of Taipei Sag and Tainan Sag, which control the dominant channel of long distance lateral migration of oil. Two paleotectonic ridges of Triassic developed in Lukeqin fault barrier belt, which provides an advantage channel for oil to continue to migrate into Triassic after adjustment.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13
【参考文献】
相关期刊论文 前2条
1 何登发,杨庚,管树巍,石昕,张朝军,王桂宏,王晓波;前陆盆地构造建模的原理与基本方法[J];石油勘探与开发;2005年03期
2 袁玉松;郑和荣;涂伟;;沉积盆地剥蚀量恢复方法[J];石油实验地质;2008年06期
，本文编号：2245518
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