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南海北部陆坡区沉积与天然气水合物成藏关系

RELATION BETWEEN SEDIMENTATION AND GAS HYDRATE RESERVOIRS IN THE NORTHERN SLOPE OF SOUTH CHINA SEA

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【作者】 沙志彬郭依群杨木壮梁金强王力峰

【Author】 SHA Zhibin1,2,GUO Yiqun2,YANG Muzhuang3,LIANG Jinqiang2,WANG Lifeng2 (1 School of Earth Resources,China University of Geosciences,Wuhan 430074,China;2 Guangzhou Marine Geological Survey,Guangzhou 510760,China;3 School of Geographical Sciences,Guangzhou University,Guangzhou 510006,China)

【机构】 中国地质大学资源学院广州海洋地质调查局广州大学地理科学学院

【摘要】 截止2007年底,世界上已直接或间接发现水合物的矿点共有132处。另外,许多地方见有生物及碳酸盐结壳标志。世界上取得天然气水合物样品的地区表明,其形成与分布除了需要特定的温压条件外,还与沉积条件有较为密切的关系。2007年5月,我国在南海北部海域成功钻获天然气水合物实物样品,证实了南海北部蕴藏有丰富的水合物资源。通过对南海中北部陆坡区地层的地震相和沉积相分布特征、层序地层和沉积体系的综合分析,总结其沉积层序的特征,并对该区域沉积条件与水合物聚集成藏的关系进行了探讨。

【Abstract】 Until the end of 2007,132 gas hydrate sites have been directly found or inferred worldwide with many locations showing biological markers and carbonate mass. In the gas hydrates bearing sediments,formation and distribution of gas hydrates are mainly controlled by specified pressure and temperature,and they are also often associated with sedimentary conditions. In May 2007,gas hydrate cores were successfully recovered in the northern slope of South China Sea,conforming the existence of vast gas hydrate resources. Through the studies of distribution characteristics of seismic facies and sedimentary facies,together with data of sequence stratigraphy and sedimentary system in the sediments of central northern slope of South China Sea,we identify features of sedimentary sequences and further analyze and discuss relation between sedimentary conditions and accumulation of gas hydrate reservoirs in this region.

【基金】 国家自然科学基金项目(40746028);国家重点基础研究发展规划项目(2009CB219508);国土资源部公益性行业科研专项项目(200811014)
  • 【文献出处】 海洋地质与第四纪地质 ,Marine Geology & Quaternary Geology , 编辑部邮箱 ,2009年05期
  • 【分类号】P744.4
  • 【被引频次】36
  • 【下载频次】538
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