海底地震观测系统设计方法研究
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摘要
海底地震仪(OBS)可以获取纵波、转换横波等多种有效的地震波信息。丰富的多波勘探信息对于弄清水合物内部速度结构、提高地层的分辨率具有重要意义。海底地震观测系统设计的主要研究目的是为海底地震数据采集提供最佳的海底地震仪分布形态、分布间距等观测系统参数。本文中结合国外OBS在天然气水合物中的应用成果,采用射线追踪法,实现了海底地震观测系统设计,取得了较好的应用效果。
Ocean bottom seismometer(OBS) can acquire various seismic information of P-wave and converted S-wave,which are vital to revel the velocity structure and to enhance resolution of strata bearing gas hydrate.The parameters of distributional pattern and space of OBS are the focus in geometry design.Based on the application of OBS acquisition on the gas hydrate at abroad,the method of ray tracing was introduced to the layout design of OBS in the paper,with a preferable effect.
Ocean bottom seismometer(OBS) can acquire various seismic information of P-wave and converted S-wave,which are vital to revel the velocity structure and to enhance resolution of strata bearing gas hydrate.The parameters of distributional pattern and space of OBS are the focus in geometry design.Based on the application of OBS acquisition on the gas hydrate at abroad,the method of ray tracing was introduced to the layout design of OBS in the paper,with a preferable effect.
引文
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[2]Amal Ray,Bertram Nolte,Don Herron,等.墨西哥湾雷马油田深水海域首次网络阵列的OBS数据采集[C]//SEG.国际博览会及74界年会,美国,丹佛:SEG,2004.Amal Ray,Bertram Nolte,Don Herron.First nodal OBS acquisition from the Thunder Horse Field in the deep water of theGulf of Mexico[C]//SEG.Int’l Exposition and 74th Annual Meeting,Denver,America:SEG,2004.
[3]Sambridge MS,Kennett B L N.非均匀介质中的边值射线追踪:一种简单而灵活的算法[J].国际地球物理,1990,101:157-168.Sambridge M S,Kennett B L N.Boundary value ray tracing in a heterogeneous medium:a simple and versatile algorithm[J].Geophys J Int,1990,101:157-168.
[4]Pereyraet V,Lee W HK,Keller HB.非均匀介质中两点地震射线追踪问题的求解,第一部分,一种广泛适应的有限差分方法[J].美国地球物理学会会刊,1980,70:79-92.Pereyraet V,Lee W HK,Keller H B.Solving two-point seismic ray-tracing problems in heterogeneous medium,Part 1,ageneral adaptive finite difference method[J].Bull Seism Soc Amer,1980,70:79-92.
[5]Vidale J.三维走时有限差分算法[J].地球物理,1990,55:521-526.Vidale J.Finite-difference calculation of traveltime in three dimensions[J].Geophysics,1990,55:521-526.
[6]张光学,黄有样,陈邦彦.海域天然气水合物地震学[M].北京:海洋出版社,2003.ZHANG Guang-xue,HUANG You-yang,CHEN Bang-yan.Seismology about marine natural gas hydrates[M].Beijing:OceanPress of China,2003.
[2]Amal Ray,Bertram Nolte,Don Herron,等.墨西哥湾雷马油田深水海域首次网络阵列的OBS数据采集[C]//SEG.国际博览会及74界年会,美国,丹佛:SEG,2004.Amal Ray,Bertram Nolte,Don Herron.First nodal OBS acquisition from the Thunder Horse Field in the deep water of theGulf of Mexico[C]//SEG.Int’l Exposition and 74th Annual Meeting,Denver,America:SEG,2004.
[3]Sambridge MS,Kennett B L N.非均匀介质中的边值射线追踪:一种简单而灵活的算法[J].国际地球物理,1990,101:157-168.Sambridge M S,Kennett B L N.Boundary value ray tracing in a heterogeneous medium:a simple and versatile algorithm[J].Geophys J Int,1990,101:157-168.
[4]Pereyraet V,Lee W HK,Keller HB.非均匀介质中两点地震射线追踪问题的求解,第一部分,一种广泛适应的有限差分方法[J].美国地球物理学会会刊,1980,70:79-92.Pereyraet V,Lee W HK,Keller H B.Solving two-point seismic ray-tracing problems in heterogeneous medium,Part 1,ageneral adaptive finite difference method[J].Bull Seism Soc Amer,1980,70:79-92.
[5]Vidale J.三维走时有限差分算法[J].地球物理,1990,55:521-526.Vidale J.Finite-difference calculation of traveltime in three dimensions[J].Geophysics,1990,55:521-526.
[6]张光学,黄有样,陈邦彦.海域天然气水合物地震学[M].北京:海洋出版社,2003.ZHANG Guang-xue,HUANG You-yang,CHEN Bang-yan.Seismology about marine natural gas hydrates[M].Beijing:OceanPress of China,2003.
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