用反射地震方法研究物理海洋—地震海洋学简介
|
摘要
地震海洋学是通过传统反射地震勘探方法研究物理海洋学的一种新方法.相对于传统的接触式温盐深测量方法,该方法具有较高的横向分辨率和能快速对整个海水剖面成像等优点,是一种非常有前途的新方法.本文将详细阐述反射地震方法在探测海洋锋温盐细结构、刻画水团边界、海洋内波、黑潮等方面的研究进展.目前海水层温度差异主要通过叠加剖面的反射轴振幅计算得到,但是叠加剖面并没有做真振幅处理.为了解决计算过程中的误差,最后提出在地震海洋学仲利用真振幅偏移结果可以使计算更加合理的设想.
Seismic oceanography is a promising new tool for studies of physical oceanography which uses conventional low frequency marine seismic reflection techniques.Compared to the traditional methods of probing the ocean,they offer several advantages,such as enhanced lateral resolution,the ability to simultaneously image large sections of the ocean,and opportunities for three-dimensional and time-lapse imaging.The paper introduces the research progress on several important oceanic phenomena,including measuring thermohaline fine structure,imaging water mass boundaries,internal wave and the Kuroshio Current.Recently the seismic stacked sections are not considered as true amplitude processed,so the temperature contrasts,which are calculated by the amplitudes of post-stack sections,are not accurate.Finally,we present an idea of using new true amplitude migration method which can make the result more sense in seismic oceanography research.
Seismic oceanography is a promising new tool for studies of physical oceanography which uses conventional low frequency marine seismic reflection techniques.Compared to the traditional methods of probing the ocean,they offer several advantages,such as enhanced lateral resolution,the ability to simultaneously image large sections of the ocean,and opportunities for three-dimensional and time-lapse imaging.The paper introduces the research progress on several important oceanic phenomena,including measuring thermohaline fine structure,imaging water mass boundaries,internal wave and the Kuroshio Current.Recently the seismic stacked sections are not considered as true amplitude processed,so the temperature contrasts,which are calculated by the amplitudes of post-stack sections,are not accurate.Finally,we present an idea of using new true amplitude migration method which can make the result more sense in seismic oceanography research.
引文
[1]Holbrook W S,Paramo P,Pearse S,Schmitt R W.Thermo-haline fine structure in an oceanographic front from seismic re-flection profiling[J].Science,2003,301(8):821~824.
[2]Nandi P,Holbrook W S,Peatse S,et al.Seismic reflectionimaging of water mass boundaries in the Norwegian Sea[J].Geophysical Research Letters,2004,31:23321.
[3]Tsuji T,Noguchi T,Niino H,et al.Two-dimensional map-ping of fine structures in the Kuroshio Current using seismicreflection data[J].Geophysical Research Letters,2005,32:14609.
[4]Holbrook W S,Fer I.Ocean internal wave spectra inferredfrom seismic reflection transects[J].Geophysical ResearchLetters,2005,32:15604.
[5]Nakamura Y,Noguchi T,Tsuji T,et al.Simultaneous seis-mic reflection and physical oceanographic observations of oce-anic fine structure in the Kuroshio extension front[J].Geo-physical Research Letters,2006,33:23605.
[6]Paramo P and Holbrook W S.Temperature contrasts in thewater column inferred from amplitude versus-offset analysis ofacoustic reflection[J].Geophysical Research Letters,2005,32:24611.
[7]Zhang Y,Sun J,Gray S,Notfors C,Bleistein N.Towardsaccurate amplitudes for one-way wavefield extrapolation of 3-Dcommon shot records[C].71st Ann.Mtg.,Soc.Expl.Geo-phys.(workshop),2001.
[8]Zhang Y,Zhang G,Bleistein N.Theory of true amplitudecommon-shot migration[C].72nd Ann.Mtg.,Soc.Expl.Geophys.2002,2471~2473.
[9]Zhang Y,Zhang G,Bleistein N.Theory of true amplitudeone-way wave equations and true amplitude common-shot mi-gration[C].73rd Ann.Mtg.Soc.Expl.Geophys.,2003,925~928.
[10]Zhang Y,Zhang G,Bleistein N.Theory of true amplitudeone-way wave equations and true amplitude common-shot mi-gration[J].Geophysics,2005,70(3):1~10.
[11]张宇.振幅保真的单程波方程偏移理论[J].地球物理学报,2006,49(5):1410~1430.Zhang Yu,The theory of true amplitude one-way wave equa-tion migration,Chinese Journal of Geophysics,2006,49(5):1410~1430.
[12]Pinheiro L M,Song H B,Ruddick B,Dubert J,Ambar I.Detailed 2-D imaging of the Mediterranean Outflow and Med-dies from Multichannel seismic data[J].Submitted to Journalof Marine system.
[13]Ruddick B,Song H B,Dong C Z,Pinheiro L M.Water col-umn seismic images as smoothed maps of dT/dz[J].Submit-ted to Oceanography.
[14]Song H B,Pinheiro L.Reflection seismic research for continentalmargin system[C].2nd Inter.Symp.on Continental MarginTectonics and Georesources,Abstracts,2007,24~25.
[15]Dong C Z,Song H B.Application of technique of suppressingdirect wave in seismic oceanography research[C].2nd Inter.Symp.on Continental Margin Tectonics and Georesources,Abstracts,2007,37~39.
[16]宋海斌,董崇志.地震海洋学的研究现状与展望[C].中国地球物理,2007,621.Song H B,Dong C Z.Progress and prospect of seismic ocea-nography[C].Chinese Geophysics,2007,621.
[17]董崇志,宋海斌.直达波去除技术在地震海洋学中的应用[C].中国地球物理,2007,622.Dong C Z,Song H B.Application of technology of removingdirect wave in seismic oceanography[C].Chinese Geophys-ics,2007,622.
[2]Nandi P,Holbrook W S,Peatse S,et al.Seismic reflectionimaging of water mass boundaries in the Norwegian Sea[J].Geophysical Research Letters,2004,31:23321.
[3]Tsuji T,Noguchi T,Niino H,et al.Two-dimensional map-ping of fine structures in the Kuroshio Current using seismicreflection data[J].Geophysical Research Letters,2005,32:14609.
[4]Holbrook W S,Fer I.Ocean internal wave spectra inferredfrom seismic reflection transects[J].Geophysical ResearchLetters,2005,32:15604.
[5]Nakamura Y,Noguchi T,Tsuji T,et al.Simultaneous seis-mic reflection and physical oceanographic observations of oce-anic fine structure in the Kuroshio extension front[J].Geo-physical Research Letters,2006,33:23605.
[6]Paramo P and Holbrook W S.Temperature contrasts in thewater column inferred from amplitude versus-offset analysis ofacoustic reflection[J].Geophysical Research Letters,2005,32:24611.
[7]Zhang Y,Sun J,Gray S,Notfors C,Bleistein N.Towardsaccurate amplitudes for one-way wavefield extrapolation of 3-Dcommon shot records[C].71st Ann.Mtg.,Soc.Expl.Geo-phys.(workshop),2001.
[8]Zhang Y,Zhang G,Bleistein N.Theory of true amplitudecommon-shot migration[C].72nd Ann.Mtg.,Soc.Expl.Geophys.2002,2471~2473.
[9]Zhang Y,Zhang G,Bleistein N.Theory of true amplitudeone-way wave equations and true amplitude common-shot mi-gration[C].73rd Ann.Mtg.Soc.Expl.Geophys.,2003,925~928.
[10]Zhang Y,Zhang G,Bleistein N.Theory of true amplitudeone-way wave equations and true amplitude common-shot mi-gration[J].Geophysics,2005,70(3):1~10.
[11]张宇.振幅保真的单程波方程偏移理论[J].地球物理学报,2006,49(5):1410~1430.Zhang Yu,The theory of true amplitude one-way wave equa-tion migration,Chinese Journal of Geophysics,2006,49(5):1410~1430.
[12]Pinheiro L M,Song H B,Ruddick B,Dubert J,Ambar I.Detailed 2-D imaging of the Mediterranean Outflow and Med-dies from Multichannel seismic data[J].Submitted to Journalof Marine system.
[13]Ruddick B,Song H B,Dong C Z,Pinheiro L M.Water col-umn seismic images as smoothed maps of dT/dz[J].Submit-ted to Oceanography.
[14]Song H B,Pinheiro L.Reflection seismic research for continentalmargin system[C].2nd Inter.Symp.on Continental MarginTectonics and Georesources,Abstracts,2007,24~25.
[15]Dong C Z,Song H B.Application of technique of suppressingdirect wave in seismic oceanography research[C].2nd Inter.Symp.on Continental Margin Tectonics and Georesources,Abstracts,2007,37~39.
[16]宋海斌,董崇志.地震海洋学的研究现状与展望[C].中国地球物理,2007,621.Song H B,Dong C Z.Progress and prospect of seismic ocea-nography[C].Chinese Geophysics,2007,621.
[17]董崇志,宋海斌.直达波去除技术在地震海洋学中的应用[C].中国地球物理,2007,622.Dong C Z,Song H B.Application of technology of removingdirect wave in seismic oceanography[C].Chinese Geophys-ics,2007,622.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心