浅海区C-Boom型浅地层剖面地层畸变及校正
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摘要
浅地层剖面测量是海洋工程勘察、灾害地质调查和大陆架海洋地质科学研究的重要手段,资料解译的准确程度将对地质调查和研究成果的可靠性造成直接影响。由于C-Boom型浅地层剖面仪的发射换能器与水听器是分开安置的,当调查区域的水深过浅时,将其近似为自激自收的单道地震系统会导致地层的畸变,水深越浅地层畸变率越大。根据浅地层剖面仪的基本原理,推导出了C-Boom型浅地层剖面仪地层畸变率的计算公式及地层畸变校正公式,为用C-View软件更准确地解译此类浅地层剖面资料提供了参考。
Subbottom profile survey is an important means for marine engineering survey,hazardous geological investigation and continental shelf geological research.The accuracy of profile interpretation can directly influence the reliability of the results from geological investigations.Because the transducer and the hydrophone of the C-Boom Subbottom Profiler are mounted separately,stratum distortion can be caused if the profiler is seen as a self-excited and collected single-channel seismic system,particularly when water depth is very shallow in the surveying area,and the shallower the water depth,the greater the stratum distortion rate.According to the basic principle of the profiler,formula for calculating the stratum distortion rate and correcting the stratum distortion have been worked out for the C-Boom Subbottom Profiler,hence providing helpful references for using C-View software to interpret such profile data more accurately.
Subbottom profile survey is an important means for marine engineering survey,hazardous geological investigation and continental shelf geological research.The accuracy of profile interpretation can directly influence the reliability of the results from geological investigations.Because the transducer and the hydrophone of the C-Boom Subbottom Profiler are mounted separately,stratum distortion can be caused if the profiler is seen as a self-excited and collected single-channel seismic system,particularly when water depth is very shallow in the surveying area,and the shallower the water depth,the greater the stratum distortion rate.According to the basic principle of the profiler,formula for calculating the stratum distortion rate and correcting the stratum distortion have been worked out for the C-Boom Subbottom Profiler,hence providing helpful references for using C-View software to interpret such profile data more accurately.
引文
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[8]LIU J J,QI G J.Skewness and Correction Method of the Subbottom Profile from very Shallow Sea Water Zone[J].Marine Geology andQuaternary Geology,1996,16(1):111-116.刘金俊,齐国钧.极浅海水区浅地层剖面浅层失真及校正[J].海洋地质与第四纪质,1996,16(1):111-116.
[9]ZHAO T H,ZHANG Z X,XU F.Analysis of Typical Problem for Shallow Acoustic Surveying in the Shallow Waters[J].ComputingTechniques for Geophysical and Geochemical Exploration,2002,24(3):215-219.赵铁虎,张志,许枫.浅水区浅地层剖面测量典型问题分析[J].物探化探计算技术,2002,24(3):215-219.
[2]ZHANG J C,CAI A Z,GUO Y F,et al.Application of subbottom profiler to coastal engineering[J].Ocean Engineering,1995,13(2):71-74.张金城,蔡爱智,郭一飞,等.浅地层剖面仪在海岸工程上的应用[J].海洋工程,1995,13(2):71-74.
[3]WEI H Y.Application of subbottom profiler to water engineering exploration[J].South China Journal of Seismology,1996,16(4):73-79.魏恒源.浅地层剖面仪在水域工程勘察中的应用[J].华南地震,1996,16(4):73-79.
[4]XIA M Y,MI X L.Application of shallow-water section plotter in offshore engineering[J].Equipment for Geophysical Prospecting,2002,12(1):52-54.夏美永,米晓利.浅海剖面仪在海洋工程中的应用[J].物探装备,2002,12(1):52-54.
[5]CHEN G X,JIA X T,CHEN Z.Application Engineering Geophysical Prospecting Method in Shallow Sea Geological Survey[J].JiangsuGeology,2004,28(3):145-148.陈国祥,贾学天,陈哲.工程物探方法在浅海域地质调查中的应用[J].江苏地质,2004,28(3):145-148.
[6]JIN X L.The development of research in marine geophysics and acoustic technology for submarine exploration[J].Progress in Geophys-ics,2007,22(4):1243-1249.金翔龙.海洋地球物理研究与海底探测声学技术的发展[J].地球物理学进展,2007,22(4):1243-1249.
[7]LI Z L,QI F Q.New Subbottom Profiler C-Boom with Unique Low Voltage Technique[J].Coastal Engineering,2005,24(3):72-77.李增林,亓发庆.采用独特低电压技术的新型浅地层剖面仪C-Boom[J].海岸工程,2005,24(3):72-77.
[8]LIU J J,QI G J.Skewness and Correction Method of the Subbottom Profile from very Shallow Sea Water Zone[J].Marine Geology andQuaternary Geology,1996,16(1):111-116.刘金俊,齐国钧.极浅海水区浅地层剖面浅层失真及校正[J].海洋地质与第四纪质,1996,16(1):111-116.
[9]ZHAO T H,ZHANG Z X,XU F.Analysis of Typical Problem for Shallow Acoustic Surveying in the Shallow Waters[J].ComputingTechniques for Geophysical and Geochemical Exploration,2002,24(3):215-219.赵铁虎,张志,许枫.浅水区浅地层剖面测量典型问题分析[J].物探化探计算技术,2002,24(3):215-219.
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