冲绳海槽天然气水合物稳定带特征和资源量评价(英文)
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摘要
根据冲绳海槽多道地震资料的处理解释,在16条地震剖面上发现了水合物拟海底反射层BSR,经过AVO、波形反演等特殊的处理技术,首次直接利用BSR圈定了冲绳海槽天然气水合物具体分布范围,直接利用数据得出了天然气水合物稳定带厚度在冲绳海槽的分布趋势,认为海槽南部最厚,中部次之,北部最薄,并通过计算得出了冲绳海槽水合物稳定带的厚度和水合物资源量,对今后海槽水合物勘查和资源量评价具有一定的指导意义。
According to the processing and interpretation of multichannel seismic reflection data in the area of Okinawa Trough, the BSR (bottom simulating reflector) was identified in 16 seismic profiles. By means of special processing technologies such as AVO and waveform inversion, the authors, for the first time, directly used the BSR to outline the distribution tendency of thickness of gas hydrate stability zone in the Trough and thought that the largest stability zone thickness was in the south and the smallest in the north. Then through calculation the authors got the thickness of hydrate stability zone and resource of the hydrate. This would be useful to the future hydrate exploration and resource evaluation in the Okinawa Trough.
According to the processing and interpretation of multichannel seismic reflection data in the area of Okinawa Trough, the BSR (bottom simulating reflector) was identified in 16 seismic profiles. By means of special processing technologies such as AVO and waveform inversion, the authors, for the first time, directly used the BSR to outline the distribution tendency of thickness of gas hydrate stability zone in the Trough and thought that the largest stability zone thickness was in the south and the smallest in the north. Then through calculation the authors got the thickness of hydrate stability zone and resource of the hydrate. This would be useful to the future hydrate exploration and resource evaluation in the Okinawa Trough.
引文
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[15]Meng Xianwei.Possibility of gas hydrate occurring in the western lower slope of Mid-Okinawa Trough.Acta Sedimentologica Sinica,2000,18(4):629-633.
[16]Tang Yong,Jin Xianglong,Fang Yinxia et al.Seismic study of gas hydrate BSR In Okinawa Trough.Acta Oceanologica Ainica,2003,25(4):59-66.
[17]Fang Yinxia.Calculation of gas hydrate stability zone in Okinawa Trough.Mineral Deposits,2002,21(4):414-419.
[18]Fang Yinxia,Li Mingbi,Jin Xianglong.Character analysis of gas hydrate stability zone in seabed.Marine Geology&Quaternary Geology,2001,21(1):103-106.
[19]Christine Ecker,Jack Dvorkin and Amos M Nur.Estimating the amount of gas hydrate and free gas from marine seismic data.Geophysics,2000,65(2):565-573.
[20]Gong Jianming,Yang Wenda,Lu Zhenquan et al.Character of regional geology and possible perspective zone of gas hydrate in East China Sea.Marine Geology Letters,2001,17(7):20-23.
[2]Fang Yinxia,Li Mingbi,Jin Xianglong et al.The formation analysis of gas hydrate in Okinawa Trough,East China Sea,Bulletin of Science and Technology.2003(1):1-5.
[3]Mallick S,Lauve J,Workman R.Analysis of bottom simulating reflector data.Soc.Expl.Geophys.Expanded Abstracts,1998:36-41.
[4]Ingo A Pecher,Timothy A Minshull et al.Velocity structure of a bottom simulating reflector offshore Peru:Results from full waveform inversion.Earth and planetary letters,1996,139:459-469.
[5]Song Haibin.Seismic inversion prospect of marine gas hydrate.Inversion Research on Elastic Parameters of Stratified Media.Beijing:High Education Press,2002:98-102.
[6]Yuan G D,Spence R D,Hyndman et al.Seismic velocity studies of a gas hydrate bottom-similating reflector on the northern Cascadia continental margin:amplitude modeling and full waveform inversion.Journal of Geophysical Research,1999,104(B1):1179-1191.
[7]Satish C Singh,Timothy A Minshull.Velocity structure of a gas hydrate reflector at Ocean Drilling Programe site889from a global seismic waveform inversion.JGR,1994,99:24221-24233.
[8]Ganyuan Xia,Mrinal K Sen,and Paul L Stoffa.Mapping of elastic properties of gas hydrates in the Carolina trough by waveform inversion.Geophysics,2000,65(3):735-744.
[9]Singh S C,Minshull T A,Spence G D.Velocity structure of a gas hydrate reflector.Science,1993,260:204-207.
[10]Korenaga J,Holbrook W S,Singh S C et al.Natural gas hydrates on the southeast U.S.margin:constraintsfrom full waveform and travel time inversions of wide-angle seismic data.Geophys.Res.,1997,102:15345-15365.
[11]Susan E Minkoff and William W Symes.Full waveform inversion of marine reflection data in the plane-wave domain.Geophysics,62(2):540-553.
[12]Ma Zaitian,Gong Jianhua,Dong Liangguo.Seismic distinguish study of marine gas hydrate.Marine Geology&Quaternary Geology,2002(1):1-4.
[13]Song Haibin,Matsubayashi Osamu.Geopgysical researches on marine gas hydrate.Progress in Geophysics,2001,16(2):118-126.
[14]Jin Xianglong.Marine Ggeology of East China Sea.Beijing:Ocean press,1992:323-330.
[15]Meng Xianwei.Possibility of gas hydrate occurring in the western lower slope of Mid-Okinawa Trough.Acta Sedimentologica Sinica,2000,18(4):629-633.
[16]Tang Yong,Jin Xianglong,Fang Yinxia et al.Seismic study of gas hydrate BSR In Okinawa Trough.Acta Oceanologica Ainica,2003,25(4):59-66.
[17]Fang Yinxia.Calculation of gas hydrate stability zone in Okinawa Trough.Mineral Deposits,2002,21(4):414-419.
[18]Fang Yinxia,Li Mingbi,Jin Xianglong.Character analysis of gas hydrate stability zone in seabed.Marine Geology&Quaternary Geology,2001,21(1):103-106.
[19]Christine Ecker,Jack Dvorkin and Amos M Nur.Estimating the amount of gas hydrate and free gas from marine seismic data.Geophysics,2000,65(2):565-573.
[20]Gong Jianming,Yang Wenda,Lu Zhenquan et al.Character of regional geology and possible perspective zone of gas hydrate in East China Sea.Marine Geology Letters,2001,17(7):20-23.
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