【作者】 贺晓；

【导师】 周立发；

【作者基本信息】 西北大学 ， 构造地质学， 2009， 硕士

【摘要】 姬塬—元城地区位于鄂尔多斯盆地中部偏西北地区,其构造位置横跨于鄂尔多斯盆地陕北斜坡和天环坳陷两大构造单元,其北部又进入38°带,构造位置特殊,是多种构造交汇位置,构造格局较为复杂。上三叠统是鄂尔多斯盆地主要的油气储集层,并具有低孔低渗的特点,裂缝为其重要的储集空间。同时,盆地裂缝的发育对油气的开发有着重要的影响,因此本文对姬塬—元城地区上三叠统的裂缝系统进行了研究,以便为该区及盆地油气勘探和开发提供理论基础和基础资料。本文以现代构造地质学理论为指导思想,遵循“整体、动态、综合”的研究原则,通过对姬塬—元城地区及邻区上三叠统裂缝系统的详细野外地质观察、测量,通过对钻井岩芯裂缝系统的详细观察、测量,通过对研究区已有地球物理资料,尤其是对研究区现有倾角测井和成像测井资料的处理与解释,结合区域和地区构造演化及分布特征来建立姬塬—元城地区上三叠统中裂缝系统发育特征及空间分布模式;在此基础上结合构造裂缝系统的分布特点、性质、规模及其变形强度,对形成裂缝的不同时期的构造应力场特征进行了研究;以延长组构造层中不同构造期次构造裂缝系统的识别及其叠加与改造为重点,通过构造解析对三叠系延长组构造层中燕山期和喜马拉雅期的构造裂缝系统的叠加关系进行了研究。同时对储层裂缝系统的形成的机理和裂缝发育的主控因素进行初步分析。更多还原

【Abstract】 Jiyuan - yuanchen researching area is located in the central - Northwest Ordos Basin, and its structure across the location of the Ordos Basin in northern Shaanxi Tianhuan Depression slopes and the two tectonic units, which entered the north of 38°zone. The location of the particular structure is a wide range of Structural convergence of location, the more complex tectonic framework. Upper Triassic in Ordos Basin is a major oil and gas reservoirs, and has the characteristics of low porosity and low permeability, fractured reservoir is important for its space. At the same time, the development of cracks in the basin of the oil and gas development has important implications, this article on Jiyuan - Metadata area the Upper Triassic of the fracture system was studied for the area and the Basin oil and gas exploration and development and infrastructure to provide the theoretical basis information.In this paper, modern structural geology theory as the guiding ideology, to follow "Overall, dynamic and comprehensive" study of the principles of Jiyuan - yuanchen researching area and adjacent areas of Upper Triassic cracks Detailed geological field observations, measurements, through core drilling cracks Detailed observations, measurements, through the study area have geophysical information, especially for the study area and imaging Diplog existing logging data processing and interpretation, combined with regional and local tectonic evolution and distribution of characteristics to create Jiyuan -yuanchen researching area Upper Triassic development of cracks in the system characteristics and spatial distribution patterns; combination on the basis of the distribution of tectonic fracture system characteristics, the nature, scale and intensity of deformation, the formation of cracks in different periods The characteristics of tectonic stress field of study; structural layer to extend the group structure in different stages of the identification of structural cracks in the system and its superposition with the focus on the transformation, through the structural analysis of the Triassic Yanchang group layer structure and the structure of Himalayan superposition of the fracture system were studied. Reservoir fracture system at the same time the mechanism of the formation of cracks and development of a preliminary analysis of controlling factors.更多还原