两种检波器GS-One和SM-24的二维地震对比测试
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摘要
进行检波器(地震道或采集道)的野外测试对比,是地震勘探设备在生产使用期间经常要做的基本工作,也是地震勘探设备初次投产使用必须要做的工作。本文以哥伦比亚实施的一个二维地震采集项目为例,对该项目中布设在同一测线的相同桩号处的SM-24检波器串和单只GS-One检波器所获取的两组数据,从原始记录的振幅及相位谱、初叠、时移剖面、衰减等方面进行了对比,详细对比剖析了它们在采集效果上的差异。所有的对比显示两者差别很小或没差异。GS-One的数据比SM-24检波器串的数据的振幅低1.14dB;在施工方面搬运GS-One比SM-24少用一半人工。
Field test comparison for geophone must be doing before putting into seismic exploration operation and also is an ordinary job during the production period.This paper took the a 2-D seismic acquisition project conducted in Columbia as an example,compared acquisition data from two sets of geophone(SM-24 and GS-One) from the original recording amplitude and phase spectra,raw records,brute stacks,time-migrated sections,and AVO responses etc.All of these comparisons showed little to no differences.The single sensor data showed RMS amplitudes that were a constant 1.14 dB below those of the 6-phone string data.Operationally,the geophysical contractor noted that the personnel required to move single phone stations was about half that required for the 6-element stations.
Field test comparison for geophone must be doing before putting into seismic exploration operation and also is an ordinary job during the production period.This paper took the a 2-D seismic acquisition project conducted in Columbia as an example,compared acquisition data from two sets of geophone(SM-24 and GS-One) from the original recording amplitude and phase spectra,raw records,brute stacks,time-migrated sections,and AVO responses etc.All of these comparisons showed little to no differences.The single sensor data showed RMS amplitudes that were a constant 1.14 dB below those of the 6-phone string data.Operationally,the geophysical contractor noted that the personnel required to move single phone stations was about half that required for the 6-element stations.
引文
1 ION Products.Sensor Geophones website.http:∥www.geophone.com/techpapers/Geophone-brochure.pdf,2001-12-13
2 Geospace Website.http:∥www.oyogeospace.com/tech-nologies/index.php?id=28,2001-12-13
3 Sercel Website.http:∥www.sercel.com/brochures/Geo-phoneshydrophones.pdf,2001-12-13
2 Geospace Website.http:∥www.oyogeospace.com/tech-nologies/index.php?id=28,2001-12-13
3 Sercel Website.http:∥www.sercel.com/brochures/Geo-phoneshydrophones.pdf,2001-12-13
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