| 柴达木盆地西部地区第三系湖相藻(蓝细菌)灰岩储层成因类型 |
| |
| 引用本文： | 赵贤正,陈子炓,陈洪德,寿建峰,施泽进.柴达木盆地西部地区第三系湖相藻(蓝细菌)灰岩储层成因类型[J].沉积学报,2004,22(2):216-224. |
| |
| 作者姓名： | 赵贤正 陈子炓 陈洪德 寿建峰 施泽进 |
| |
| 作者单位： | 石油大学,北京,昌平,102249;成都理工大学,成都,610059;杭州地质研究所,杭州,310023 |
| |
| 摘 要： | 柴达木盆地西部地区第三系湖相藻(蓝细菌)灰岩储层的成因类型主要包括两类:滨湖亚相的藻(蓝细菌)坪灰岩和浅湖亚相的藻(蓝细菌)丘灰岩。滨湖亚相的藻(蓝细菌)坪灰岩和浅湖亚相的藻(蓝细菌)丘灰岩具有完全不同的沉积特征、岩石类型和储层特征。柴达木盆地第三系藻(蓝细菌)灰岩储层分布较广,是柴达木盆地第三系碳酸盐岩储层中最重要的油气储层。目前柴达木盆地第三系藻(蓝细菌)灰岩储层主要见于西部地区的跃西、跃东、七个泉、狮子沟、花土沟、尖顶山、南翼山和大风山等地区,层位上从下干柴沟组上段(E23)至上油砂山组(N22)均有分布。E23和N1的藻(蓝细菌)灰岩主要分布于英雄岭凹陷以西(西南)地区,N12和N22的藻(蓝细菌)灰岩主要分布于英雄岭凹陷以东(东北)地区,这与柴达木盆地的湖水进退、沉积中心的迁移及盆地演化有着密切的关系。滨湖亚相藻(蓝细菌)坪灰岩储层的储集空间以次生溶孔和溶缝为主,溶孔和溶缝的形成与大气淡水的淋滤作用有关。浅湖亚相藻(蓝细菌)丘灰岩储层的储集空间以次生溶孔和溶缝为主,同时也发育原生枝管状钙藻(绿藻门的松藻科)的藻管孔,溶孔和溶缝的形成与晚期沿断裂带大气淡水的溶解作用及有机酸的溶解作用有关。
|
| 关 键 词： | 柴达木盆地 第三系 湖相藻灰岩 |
| 文章编号： | 1000-0550(2004)02-0216-09 |
| 收稿时间： | 2003-05-09 |
| 修稿时间： | 2003年5月9日 |
Genetic Types of Tertiary Lacustrine Algal(Cyanobacteria) Limestones Reservoirs in Western Qaidam Basin |
| |
| ZHAO Xian-zheng,CHEN Zi-liao,CHEN Hong-de,SHOU Jian-feng,SHI Ze-jin.Genetic Types of Tertiary Lacustrine Algal(Cyanobacteria) Limestones Reservoirs in Western Qaidam Basin[J].Acta Sedimentologica Sinica,2004,22(2):216-224. |
| |
| Authors: | ZHAO Xian-zheng CHEN Zi-liao CHEN Hong-de SHOU Jian-feng SHI Ze-jin |
| |
| Institution: | 1.Petroleum University, Changping, Beijing 102249;2.Chengdu University of Technology, Chengdu 610059;3.Hangzhou Institute of Petroleum Geology, Hangzhou 310023 |
| |
| Abstract: | Genetic types of tertiary lacustrine algal(cyanobacteria) limestones reservoirs in the western Qaidam basin mainly include:algal(cyanobacteria) flat limestones in littoral lake and algal(cyanobacteria) mound limestones in shallow lake.There are of completely different sedimentation characteristics,lithological types and reservoir featares.Tertiary algal(cyanobacteria)limestones reservoirs in the western Qaidam basin are characterized by widespread distribution and being the most important in the carbonate reservoirs.Tertiary algal(cyanobacteria)limestone reservoirs in the western Qaidam basin have been found in Yuexi, Yuedong,Qigequan, Shizigou, Huatugou, Jiandingshan, Nanyishan and Dafengshan regions etc., and distributed from E~2 3 to N~2 2. Algal(cyanobacteria)limestones reservoirs in E~2 3 and N 1 distributed mainly in the west(southwest) region of Yingxionglingdepression, those in N~1 2 and N~2 2 distributed mainly in east(northeast) region of Yingxionglingdepression. Distribution of algal(cyanobacteria)limestones in the western Qaidam basin is mainly controlled by lake level changes,migration of sedimentation center and basin evolution.Reservoir spaces of algal(cyanobacteria)flatlimestones in littoral lake are predominant with secondary disolution pores and disolution fissures .They are possibly controlled by atmospheric water leaching.Reservoir spaces of algal(cyanobacteria)moundlimestones in shallow lake are predominant with secondary disolution pores and disolution fissures,and also developed primary algal tube pores.They are possibly controlled bydisolution along rupture zones and organic acid disolution. |
| |
| Keywords: | western Qaidam basin Tertiary lacustrine algal(cyanobacteria)limestones genetic types |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《沉积学报》浏览原始摘要信息 |
| 点击此处可从《沉积学报》下载免费的PDF全文 |
|
