他拉哈西—英台地区深水重力流沉积特征研究
发布时间：2018-10-24 16:13
【摘要】：从七十年代起,重力流勘探就在勘探领域占有重要的一席之地。但目前我国对重力流沉积研究并非非常成熟,很多理论与实际勘探问题仍在工作的进行中逐步发现并完善,基于岩心、测井、分析化验和地震等资料的综合分析,结合国内外深水重力流研究的最新进展,本次研究以松辽盆地他拉哈西-英台地区青山口组为主要研究对象,对大型坳陷湖盆重力流的沉积特征、识别标志、分布规律和勘探潜力进行了系统研究。本文对他拉哈西-英台地区青山口组三、四级层序进行了识别与划分,主要识别出冲刷面底部、坝体顶部、泥岩基值转换点、最大湖泛面四种层序界面,并将研究区域青山口组划分为3个长期旋回和12个中期旋回,以此基础上建立了四级层序地层格架。研究区青山口组的古底形恢复得出了青一段到青三段平均坡度为0.2°~0.5°,重力流主要形成并控制于坡折带。多级地貌不但控制着重力流的形成并且还控制了重力流的形式,多级坡折带易形成子母扇,大型低洼地貌控制叠置扇的形成,断坑地貌发育断坑重力流体,并且多级地貌形成的重力流形式在地震反射上均有相对应的不同反射特征。文章详细对研究区主要发育的四种重力流形式进行了沉积特征、识别标志、分布规律和外部形态的描述与对比,其中对最主体的砂质碎屑流做了粒度分析与C-M图分析,显示出了其牵引流与重力流特征兼备的二元性;地震上将重力流砂体厚度与砂地比、合成记录对应起来,通过地震属性切片分析得出砂地比变化对地震反射特征的重要影响。重力流砂体由于其搬运方式、沉积超压环境和有机酸的溶蚀作用的影响,其储层物性具有很好的优势,我们对研究区的勘探潜力分析发现圈闭217个,单个圈闭面积约0.3-15 Km2,总面积达161.5Km2,勘探潜力十分可观。文章观点与研究成果为陆相湖盆深水重力流沉积理论做出一定贡献,并在大庆未来勘探部署中有一定实际意义。
[Abstract]:Since the 1970 s, gravity flow exploration has played an important role in the exploration field. However, at present, the study of gravity flow deposition in China is not very mature, and many theoretical and practical exploration problems are still being discovered and perfected step by step, based on the comprehensive analysis of core, logging, analytical laboratory and seismic data, etc. Combined with the latest development of deep water gravity flow research at home and abroad, the Qingshankou formation in Tahashi and Yingtai area of Songliao Basin is taken as the main research object, and the sedimentary characteristics of gravity flow in large depression lake basin are identified. The distribution law and exploration potential are systematically studied. In this paper, the third and fourth order sequences of Qingshankou formation in Tharahas-Yingtai area are identified and divided. The four sequence interfaces are mainly identified: the bottom of scour surface, the top of dam body, the transition point of mudstone base value, the maximum lake pan-surface. The Qingshankou formation is divided into 3 long term cycles and 12 middle cycles, based on which the fourth order stratigraphic framework is established. The average slope of the Qingshankou formation is 0.2 掳~ 0.5 掳, and the gravity flow is mainly formed and controlled in the slope break zone. The multilevel geomorphology not only controls the formation of gravity flow but also controls the form of gravity flow. The multilevel slope break zone is easy to form subparent fan, and the large low-lying geomorphology controls the formation of superimposed fan, and the fault pit geomorphology develops crater gravity fluid. And the gravity flow forms formed by multilevel geomorphology have different reflection characteristics in seismic reflection. The paper describes and compares the sedimentary characteristics, identification marks, distribution rules and external forms of the four main gravity flow forms in the study area. Among them, the grain-size analysis and C-M analysis of the most main sand clastic flow are carried out. It is shown that the characteristics of traction flow and gravity flow are both duality, and that the thickness of gravity flow sand body and the ratio of sand to ground are corresponding to the synthetic records, and the important influence of the change of sand to ground ratio on seismic reflection characteristics is obtained through seismic attribute slice analysis. Due to the influence of its transport mode, sedimentary overpressure environment and dissolution of organic acid, the gravity flow sand body has a good advantage in reservoir properties. We have found 217 traps by analyzing the exploration potential of the study area. The area of a single trap is about 0.3-15 Km2, with a total area of 161.5 km ~ 2, and the potential for exploration is considerable. The views and results of this paper contribute to the theory of deep-water gravity flow deposition in continental lacustrine basin and are of practical significance in the future exploration and deployment of Daqing.
【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】：P631.1;P618.13
本文编号：2291878
[Abstract]:Since the 1970 s, gravity flow exploration has played an important role in the exploration field. However, at present, the study of gravity flow deposition in China is not very mature, and many theoretical and practical exploration problems are still being discovered and perfected step by step, based on the comprehensive analysis of core, logging, analytical laboratory and seismic data, etc. Combined with the latest development of deep water gravity flow research at home and abroad, the Qingshankou formation in Tahashi and Yingtai area of Songliao Basin is taken as the main research object, and the sedimentary characteristics of gravity flow in large depression lake basin are identified. The distribution law and exploration potential are systematically studied. In this paper, the third and fourth order sequences of Qingshankou formation in Tharahas-Yingtai area are identified and divided. The four sequence interfaces are mainly identified: the bottom of scour surface, the top of dam body, the transition point of mudstone base value, the maximum lake pan-surface. The Qingshankou formation is divided into 3 long term cycles and 12 middle cycles, based on which the fourth order stratigraphic framework is established. The average slope of the Qingshankou formation is 0.2 掳~ 0.5 掳, and the gravity flow is mainly formed and controlled in the slope break zone. The multilevel geomorphology not only controls the formation of gravity flow but also controls the form of gravity flow. The multilevel slope break zone is easy to form subparent fan, and the large low-lying geomorphology controls the formation of superimposed fan, and the fault pit geomorphology develops crater gravity fluid. And the gravity flow forms formed by multilevel geomorphology have different reflection characteristics in seismic reflection. The paper describes and compares the sedimentary characteristics, identification marks, distribution rules and external forms of the four main gravity flow forms in the study area. Among them, the grain-size analysis and C-M analysis of the most main sand clastic flow are carried out. It is shown that the characteristics of traction flow and gravity flow are both duality, and that the thickness of gravity flow sand body and the ratio of sand to ground are corresponding to the synthetic records, and the important influence of the change of sand to ground ratio on seismic reflection characteristics is obtained through seismic attribute slice analysis. Due to the influence of its transport mode, sedimentary overpressure environment and dissolution of organic acid, the gravity flow sand body has a good advantage in reservoir properties. We have found 217 traps by analyzing the exploration potential of the study area. The area of a single trap is about 0.3-15 Km2, with a total area of 161.5 km ~ 2, and the potential for exploration is considerable. The views and results of this paper contribute to the theory of deep-water gravity flow deposition in continental lacustrine basin and are of practical significance in the future exploration and deployment of Daqing.
【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】：P631.1;P618.13
【参考文献】
相关期刊论文 前1条
1 庞雄;彭大钧;陈长民;朱明;何敏;申俊;柳保军;;三级“源-渠-汇”耦合研究珠江深水扇系统[J];地质学报;2007年06期
，本文编号：2291878
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