欢迎访问现代地质!

现代地质 ›› 2008, Vol. 22 ›› Issue (3): 333-341.

• 成藏系统 •    下一篇

中国海域的天然气水合物资源

姚伯初1,杨木壮2,吴时国3,王宏斌1   

  1. 1广州海洋地质调查局,广东 广州 510075;
    2广州大学 地理科学学院,广东 广州 510006;
    3中国科学院海洋研究所 中国科学院海洋地质与环境重点实验室,山东 青岛 266071
  • 收稿日期:2008-02-18 修回日期:2008-06-05 出版日期:2008-03-20 发布日期:2008-03-20
  • 作者简介:姚伯初,男,教授级高级工程师,1940年出生,固体地球物理专业,主要从事海洋地球物理调查和区域地质构造、油气地质研究。
  • 基金资助:

    国家自然科学基金项目(40746028)

The Gas Hydrate Resources in the China Seas

YAO Bo-chu1,YANG Mu-zhuang2,WU Shi-guo3,WANG Hong-bin1   

  1. 1Guangzhou Marine Geological Survey, Guangzhou, Guangdong 510075, China;
    2School of Geographical Sciences, Guangzhou University, Guangzhou, Guangdong 510006,China;
    3Key Laboratory of Marine Geology & Environment, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, Shangdong 266071,China
  • Received:2008-02-18 Revised:2008-06-05 Online:2008-03-20 Published:2008-03-20

摘要:

天然气水合物是甲烷等天然气在高压、低温条件下形成的冰状固体物质。据估算,全球天然气水合物中碳的含量等于石油、煤等化石能源中碳含量的2倍。在人类面临化石能源即将枯竭的时候,各国科学家和政府都把目光投向这一未来能替代化石能源的新能源。新生代构造演化历史、沉积条件、沉积环境等显示,南海具有生成和蕴藏巨大天然气水合物资源的条件;南海海域的地震反射剖面多处显示存在BSR反射波;2007年已钻探见到水合物样品。东海冲绳海槽在第四纪的沉积速率高(10~40 cm/ka),槽坡存在泥底辟构造和断裂活动,从上新世以来发生过两次构造运动,这些对天然气水合物的形成是十分有利的;因此,中国海域的天然水合物资源是十分丰富的,在不远的将来它可能成为新的替代能源。

关键词: 天然气水合物, 似海底反射, 资源量, 沉积环境, 构造环境, 上新世, 中国海域

Abstract:

The forming conditions of gas hydrate in the China seas according to the physical oceanography, palaeo-climate, sedimentary environment,and tectonic environment are discussed in this paper.The researching results show that the organism producibility is high and there are rich organic matters in sediments of the period 2,4,6 of oxygen-isotope in the South China Sea.  In these periods the sedimentary velocity was very high, and there are very good material conditions for the formation of gas hydrate. In addition, since Pliocene, the Philippine Sea plate has collided with Asian plate in Taiwan area, extruding the northeast part of the South China Sea along northwest direction. Owning to the extruding force in the sediments the fluid is very active and it is benefit for the formation of the gas hydrate. We have collected the sedimentary samples containing the gas hydrates through the drilling on the northern slope of the South China Sea in 2007. In the Okinawa Trough of the East China Sea, some mud volcanoes or mud diapir structures and the active faults were found in the west slope of the trough. The sedimentary rates are high in Quaternary in the trough,from 10 cm/ka to 40 cm/ka. The BSRs in the seismic profiles show that there should exist the gas hydrates in the Okinawa Trough. For above reasons, we infer that gas hydrates are rich in the China seas.

Key words: gas hydrate, BSR, resource, sedimentary environment, tectonic environment, Pliocene, the China seas

中图分类号: