| 含天然气水合物沉积物的岩石物性模型与似海底反射层的AVA特征 |
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| 引用本文： | 宋海斌, Matsubayashi Osamu, 杨胜雄, 吴能友, 江为为, 郝天珧. 含天然气水合物沉积物的岩石物性模型与似海底反射层的AVA特征[J]. 地球物理学报, 2002, 45(04): 546-556, |
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| 作者姓名： | 宋海斌 Matsubayashi Osamu 杨胜雄 吴能友 江为为 郝天珧 |
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| 作者单位： | 1. 中国科学院地质与地球物理研究所,北京,100101; 2. 日本地质调查所,筑波,3058567; 3. 广州海洋地质调查局,广州,510760 |
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| 摘 要： | 研究含天然气水合物沉积物的岩石物性模型与似海底反射层的振幅随入射角变化(AVA)特征. 基于时间平均-Wood加权方程、三相介质波传播理论模型和弹性模量模型,计算并阐述含天然气水合物岩石弹性参数与水合物饱和度、含游离气岩石弹性参数与游离气饱和度的关系;给出不同模型AVA特征. 结果表明,不同天然气水合物饱和度、不同游离气饱和度的各种组合呈现形态相似但反射系数值不同的AVA特征.
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| 关 键 词： | 天然气水合物 岩石物性 饱和度 振幅随入射角变化 似海底反射层. |
| 收稿时间： | 2001-05-25 |
| 修稿时间： | 2002-03-05 |
PHYSICAL PROPERTY MODELS OF GAS HYDRATE-BEARING SEDIMENTS AND AVA CHARACTER OF BOTTOM SIMULATING REFLECTOR |
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| SONG HAI BIN, MATSUBAYASHI OSAMU, YANG SHENG XIONG, WU NENG YOU, JIANG WEI WEI, HAO TIAN YAO. PHYSICAL PROPERTY MODELS OF GAS HYDRATE-BEARING SEDIMENTS AND AVA CHARACTER OF BOTTOM SIMULATING REFLECTOR[J]. Chinese Journal of Geophysics (in Chinese), 2002, 45(04): 546-556, |
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| Authors: | SONG HAI BIN MATSUBAYASHI OSAMU YANG SHENG XIONG WU NENG YOU JIANG WEI WEI HAO TIAN YAO |
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| Affiliation: | 1. Institute of Geology and Geophysics, CAS, Beijing 100101, China; 2. Geological Survey of J apan, Tsukuba 3058567, Japan; 3. Guangzhou Marine Geological Survey, Guangzhou 510760, China |
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| Abstract: | Physical property models of gas hydrate bearing sediments are studied and the amplitude versus angle （AVA） character of bottom simulating reflector are analysed. The relationships between elastic properties and gas hydrate/free gas concentration are presented based on the models of weighted time average wood's equation, seismic wave propagation in three phases effective medium and elastic modulus. The AVA character of different models are calculated and analyzed. The analysis of AVA character of BSR shows that different reflection coefficient values but similar configurations of AVA curves are given for various combinations of different concentrations of gas hydrate and free gas. |
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| Keywords: | Gas hydrates Physical properties Concentration Amplitude versus angle Bottom simulating reflector |
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