海洋天然气水合物地震识别标志
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摘要
天然气水合物的地震识别标志对海洋天然气水合物勘探和研究具有十分重要的意义。本文根据国外探测和研究成果,详细分析了似海底反射波(BSR)、振幅空白、负极性和异常高速带等海洋天然气水合物的地震识别标志及其特征。
To distinguish the seismic evidence of gas hydrates in seismic reflection sections is very significant for the primary exploration and researches on marine gas hydrates. On the basis of the results from for- eign explorations and researches, combined with the first collection data for gas hydrates survey in China, this paper searches for the seismic evidence, analyzes their features and indicates the exist- ence of gas hydrates, such as Bottom Simulating Reflectors (BSR), amplitude blanking, polarity re- versal and high velocity anomaly.
To distinguish the seismic evidence of gas hydrates in seismic reflection sections is very significant for the primary exploration and researches on marine gas hydrates. On the basis of the results from for- eign explorations and researches, combined with the first collection data for gas hydrates survey in China, this paper searches for the seismic evidence, analyzes their features and indicates the exist- ence of gas hydrates, such as Bottom Simulating Reflectors (BSR), amplitude blanking, polarity re- versal and high velocity anomaly.
引文
1． Sloan, E. D., 1998, A primer on the geological occurrence of gas hydrates. in: Henriet J. P., ed. Gas hydrates relevance to world margin stability and climate change. London the geological society, 31～50．
2． Gornitz, V., et al., 1994, Potential distribution of methane hydrate in the world ocean. Global Biogechemical Cycles,Vol.8, No.3, 335～346．
3． 姚伯初,1998,南海北部陆缘天然气水合物初探,海洋地质与第四纪地质,1998,Vol.18,No.4,11～18。
4． Yang Muzhuang, et al., 1999, Exploration prospect of gas hydrates in South China Sea. Fouth international conference on Asian Marine Geology.
5． 张光学、文鹏飞,2000,南海甲烷水合物的地震特征研究,首届广东青年科学家论坛论文集,中国科学技术出版社。
6． Miller, J. J., et al., 1991, An analysis of a seismic reflection from the base of a gas hydrate zone, offshore Peru. A. A.P. G. Bulletin, Vol. 75, No. 5, 910～924．
7． Lee, M. W., etal., 1993, Seismic character of gas hydrates on the Southeastern U. S. continental margin. Marine Geo-physical Researches, Vol. 16, 163～184．
8． Shiply, T. H., et al., 1979, Seismic evidence for widespread possible gas hydrate horizons on continental slopes and rises.A. A. P. G. Bulletin, Vol. 63, No. 12, 2204～2213．
9． Hyndman, R. D., Spence, G. D., 1992, A seismic study of methane hydrate marine bottom simulating reflectors. Journal of Geophysical Research, Vol. 97, No. B5, 6683～6698．
2． Gornitz, V., et al., 1994, Potential distribution of methane hydrate in the world ocean. Global Biogechemical Cycles,Vol.8, No.3, 335～346．
3． 姚伯初,1998,南海北部陆缘天然气水合物初探,海洋地质与第四纪地质,1998,Vol.18,No.4,11～18。
4． Yang Muzhuang, et al., 1999, Exploration prospect of gas hydrates in South China Sea. Fouth international conference on Asian Marine Geology.
5． 张光学、文鹏飞,2000,南海甲烷水合物的地震特征研究,首届广东青年科学家论坛论文集,中国科学技术出版社。
6． Miller, J. J., et al., 1991, An analysis of a seismic reflection from the base of a gas hydrate zone, offshore Peru. A. A.P. G. Bulletin, Vol. 75, No. 5, 910～924．
7． Lee, M. W., etal., 1993, Seismic character of gas hydrates on the Southeastern U. S. continental margin. Marine Geo-physical Researches, Vol. 16, 163～184．
8． Shiply, T. H., et al., 1979, Seismic evidence for widespread possible gas hydrate horizons on continental slopes and rises.A. A. P. G. Bulletin, Vol. 63, No. 12, 2204～2213．
9． Hyndman, R. D., Spence, G. D., 1992, A seismic study of methane hydrate marine bottom simulating reflectors. Journal of Geophysical Research, Vol. 97, No. B5, 6683～6698．
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