| 南海琼东南盆地天然气水合物稳定域分布特征及资源预测 |
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| 引用本文： | 陈多福,李绪宣,夏斌.南海琼东南盆地天然气水合物稳定域分布特征及资源预测[J].地球物理学报,2004,47(3):483-489. |
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| 作者姓名： | 陈多福 李绪宣 夏斌 |
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| 作者单位： | 中国科学院广州地球化学研究所,广州,510640;中国科学院广州天然气水合物研究中心,广州,510640;中国科学院广州地球化学研究所,广州,510640;中国海洋石油研究中心南海西部研究院,湛江,524057;中国科学院广州地球化学研究所,广州,510640 |
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| 基金项目： | 国家自然科学基金项目 (40 0 72 0 4 4 )，中国科学院知识创新重要方向项目 (KZCX3 -SW - 2 1 9，KGCX2 -SW - 30 9，KZCX2 -SW - 1 1 7) |
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| 摘 要： | 琼东南盆地油气地质显示盆地内具有生物成因和热成因天然气的巨大生成能力和远景. 地震剖面显示盆地内发育有泥底辟和气烟囱、沟通泥底辟和气烟囱与海底的断裂及可能正在活动的天然气冷泉，这些特征非常有利于天然气水合物的发育. 通过天然气水合物热力学稳定域预测，确定了琼东南盆地天然气水合物的平面和剖面分布特征. 生物成因甲烷水合物分布于水深大于约600m的海底，稳定带最大厚度约314m；热成因天然气水合物分布于水深大于约450m的海区，稳定带最大厚度约410m. 盆地内天然气水合物远景总量约10×109m3,水合物天然气远景为1.6×1012m3.
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| 关 键 词： | 天然气水合物 分布和产出 资源远景 琼东南盆地 南海 |
| 文章编号： | 0001-5733(2004)03-0483-07 |
| 修稿时间： | 2004-1-14 |
Distribution of gas hydrate stable zones and resource prediction in the Qiongdongnan Basin of the South China Sea. |
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| CHEN Duo Fu LI Xu Xuan , XIA Bin Key Laboratory of Marginal Sea Geology,Guangzhou Institute of Geochemistry and South China Sea Institute of Oceanology,Chinese Academy of Sciences,Wushan Guangzhou ,China Center for Gas Hydrate Research,Chinese Academy of Sciences,Wushan Guangzhou ,China Nanhai West Institute of China National Offshore Petroleum Research Center,Zhanjiang Guangdong ,China.Distribution of gas hydrate stable zones and resource prediction in the Qiongdongnan Basin of the South China Sea.[J].Chinese Journal of Geophysics,2004,47(3):483-489. |
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| Authors: | CHEN Duo Fu LI Xu Xuan XIA Bin Key Laboratory of Marginal Sea Geology Guangzhou Institute of Geochemistry and South China Sea Institute of Oceanology Chinese Academy of Sciences Wushan Guangzhou China Center for Gas Hydrate Research Chinese Academy of Sciences Wushan Guangzhou China Nanhai West Institute of China National Offshore Petroleum Research Center Zhanjiang Guangdong China |
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| Institution: | 1.Key Laboratory of Marginal Sea Geology, Guangzhou Institute of Geochemistry and South China Sea Institute of Oceanology, Chinese Academy of Sciences, Wushan Guangzhou 510640, China 2 Center for Gas Hydrate Research, Chinese Academy of Sciences, Wushan Guangzhou 510640, China 3 Nanhai West Institute of China National Offshore Petroleum Research Center, Zhanjiang Guangdong 524057, China |
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| Abstract: | Oil and gas prospecting in the Qiongdongnan basin of the South China Sea indicates the potential of plenitudinous natural gases. Seismic sections show the occurrences of diapirs and gas filled zones that are communicated with seafloor through faults. The blur zones near seafloor on seismic section may suggest gas plumes in seawater. These characteristics are comparatively propitious to hydrate occurrence. A profile of gas hydrate stable zones across the basin slope is constructed by using thermodynamic prediction. Biogenic methane hydrates occur probably in the subsurface where water depth is larger than ～600m with ～310m of the maximum thickness, and thermogenic gas hydrates occur possibly on the subsurface where water depth is larger than ～450m with ～410m of the maximum thickness. The gas hydrate of ～10×109m3, and the hydrate gas of ～1.65×1012m3 are estimated in the Qiongdongnan basin of the South China Sea. |
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| Keywords: | Gas hydrates Distribution and occurrence Resource potential Qiongdongnan basin South China Sea |
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