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| ODP204航次天然气水合物的可能有利储层——浊积层 | |
| 引用本文： | 龚建明,张莉,陈建文,Young-Joo LEE,王红霞,闫桂京.ODP204航次天然气水合物的可能有利储层——浊积层[J].现代地质,2005,19(1):21-25. |
| 作者姓名： | 龚建明 张莉 陈建文 Young-Joo LEE 王红霞 闫桂京 |
| 作者单位： | 1. 中国海洋大学,海洋地球科学学院,山东,青岛,266003;青岛海洋地质研究所,山东,青岛,266071 2. 广州海洋地质调查局,广东,广州,510075 3. Korea Institute of Geoscience&Mineral Resources,30 Gaiung-dong Yusung-gu,Daejon 305-350,Korea 4. 中国海洋大学,海洋地球科学学院,山东,青岛,266003 |
| 基金项目： | 国家重点基础研究发展规划项目(G20000467). |
| 摘 要： | 为了解岩性在天然气水合物分布中的作用, 利用岩矿鉴定、扫描电镜和能谱法对ODP204航次的 4个站位 10个钻孔共计 115个沉积物样品进行分析, 发现沉积物中矿物成分基本相近, 以粘土矿物为主, 含少量以石英为主的陆源碎屑。样品中含有丰富的硅藻和有孔虫等微体化石, 可形成硅藻粘土—硅藻土、有孔虫硅藻土或凝灰质硅质生物粘土。石英碎屑大多呈棱角状, 粒径小、含量少, 同时, 样品中可见透镜体、团块或旋涡状层状结构以及杂乱堆积的斑杂构造。上述特征表明沉积物为含有大量深海或半深海的浊流沉积物或其夹层。由于钻井岩心中有相当部分的天然气水合物样品分布在上述沉积物中, 推断这些浊流沉积物很可能是ODP204航次天然气水合物的有利储层。 |
| 关 键 词： | 岩矿鉴定 电镜扫描 浊流沉积物 天然气水合物 ODP204航次 |
| 文章编号： | 1000-8527(2005)01-0021-05 |
| 修稿时间： | 2004年10月18 |
A Favorable Reservoir for Gas Hydrate Found in ODP Leg 204: Turbidite |
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| GONG Jian-ming,ZHANG Li,CHEN Jian-wen,Young-Joo LEE,WANG Hong-xia,YAN Gui-jing.A Favorable Reservoir for Gas Hydrate Found in ODP Leg 204: Turbidite[J].Geoscience——Journal of Graduate School,China University of Geosciences,2005,19(1):21-25. | |
| Authors: | GONG Jian-ming ZHANG Li CHEN Jian-wen Young-Joo LEE WANG Hong-xia YAN Gui-jing |
| Institution: | GONG Jian-ming~ |
| Abstract: | Methods of rock-mineral identification, scanning electron microscopy and energy spectrum are used to analyze 115 sediment samples from 10 drilling holes at four sites of ODP Leg 204 in order to make clear the relation between lithology and gas hydrate distribution. We find that the samples are nearly similar to each other in mineral compositions, mainly consisting of clay with minor terrestrial clasts dominated by quartz. The samples are rich in diatom and microfossils (such as foraminifers) and take the forms of diatomaceous clay, foraminiferal diatomaceous clay or tuffaceous and siliceous organic clay. Quartz clasts are mostly angular, and small both in grain size and quantity. The samples show lenticular, crumb and whirl-lamination structures, and mottled texture typical of chaotic accumulation, suggesting deep-sea or semi-pelagic turbidite or interbeds. Since drilling-proved gas hydrate samples are distributed in the turbidite, such sediments are considered as a favorable reservoir for gas hydrate of ODP Leg 204. |
| Keywords: | rock-mineral identification scanning electron microscopy turbidite gas hydrate ODP Leg 204 |
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