| 砂岩侵入体系模拟及形成机理分析 |
| |
| 引用本文： | 易雪斐,张昌民,李少华,杜家元,李康,王浩宇,李向阳,周凤娟,袁才.砂岩侵入体系模拟及形成机理分析[J].古地理学报,2015,17(5):669-676. |
| |
| 作者姓名： | 易雪斐 张昌民 李少华 杜家元 李康 王浩宇 李向阳 周凤娟 袁才 |
| |
| 作者单位： | 1.非常规油气湖北省协同创新中心,湖北武汉 430100;2.长江大学油气资源与勘探技术教育部重点实验室,湖北武汉 430100;3.中海石油(中国)有限公司深圳分公司,广东广州 510240;4.河南省核工业地质局,河南信阳 464000 |
| |
| 基金项目： | 国家“十二五”重大专项(编号:2011ZX05023-002)资助 |
| |
| 摘 要： | 砂岩侵入体系是一种普遍的地质现象,近些年来越来越受到地学界的重视,但对其形成机理探讨较少。作者及研究团队通过设计一套室内模拟实验装置,来简化模拟3层地层结构中砂岩侵入体系的形成和演化过程。在之前模拟实验(实验变量为顶层沉积物的厚度、进水管的结构)结果的基础上,进一步考察了地形坡度对实验结果的影响,并对砂岩侵入体系的形成机理进行了分析。实验过程中,共观察到7种不同形态不同样式的管道,并对实验过程中压力变化进行了测试。对实验结果分析认为:盖层厚度越大,压力下降的速度越慢,越不利于压力的释放;随着实验的继续进行,砂岩侵入体最终会转化为砂岩喷出体并喷出地表;不稳定的地形有利于触发疏松沉积物发生变形。实验表明,超压是砂岩侵入体发生的最重要条件之一,沉积盆地中的压实不均衡和生烃作用是可独立产生大规模超压的2种主要机制。
|
| 关 键 词： | 流化 超压 物理模拟 砂岩侵入体系 形成机理 |
| 收稿时间： | 15 November 2014 |
Sand injectite simulation and formation mechanism analysis |
| |
| Yi Xuefei,Zhang Changmin,Li Shaohua,Du Jiayuan,Li Kang,Wang Haoyu,Li Xiangyang,Zhou Fengjuan,Yuan Cai.Sand injectite simulation and formation mechanism analysis[J].Journal of Palaeogeography,2015,17(5):669-676. |
| |
| Authors: | Yi Xuefei Zhang Changmin Li Shaohua Du Jiayuan Li Kang Wang Haoyu Li Xiangyang Zhou Fengjuan Yuan Cai |
| |
| Institution: | 1.Hubei Cooperative Innovation Center of Unconventional Oil and Gas,Wuhan 430100,Hubei;2.Key Laboratory of Oil and Gas Resources and Exploration,Ministry of Education, Yangtze University,Wuhan 430100,Hubei;3.Shenzhen Branch of CNOOC Ltd.,Guangzhou 510240,Guangdong;4.Henan Nuclear Industry Geology Bureau,Xinyang 464000,Henan |
| |
| Abstract: | Soft sediment deformation is a common geological phenomenon,which has been focused on these years in the field of geosciences, but less study is on the formation mechanism of soft sediment deformation. A set of laboratory simulation device is designed to simulate the formation and evolution of sand injectites in a simplified three layers model in this paper. On the basis of the former simulation experiments,which only took account of the thickness of the overlying coarse sediment layer and the configuration of inlet pipes,the slope angles of terrain are examined to test the influence of three main variables on the structures formed during fluidization. Also,the formation mechanism is discussed. 7 different shape pipes in different types are observed and the pressures are tested during the experiments. The results show that the thicker the overlying layer is,the slower the pressure drops;the sand injectites finally will erupt out of the surface and turn out to be sand extrusions;unstable terrain is conducive to trigger the deformation of soft sediments. It is showed that overpressure is one of the most important conditions. Compaction disequilibrium and hydrocarbon generation are the two main independent controlling factors of different phases for the development and evolution of overpressure in sedimentary basins. |
| |
| Keywords: | fluidization overpressure physical simulation sand injectite formation mechanism |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《古地理学报》浏览原始摘要信息 |
| 点击此处可从《古地理学报》下载免费的PDF全文 |
|
