复杂地区检波器组合高差限制分析
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摘要
在复杂地区存在大量的复杂干扰,特别是次生波干扰非常发育。要压制这些干扰,需要加大组合排列长度,势必导致组合高差增加而损害有效波。通过模型正演、波形和频谱分析方法得出:在复杂地区勘探中对检波器组内高差小于1/4视波长的规定过于保守,束缚了大组合压制干扰技术在复杂地区的应用;组内高差的极限受地形、所保护的地震波波长、信噪比等因素影响,是变化的参数;放宽组内高差的限制,尽管有效波被损伤的程度会稍大一些,但如果干扰波被压制的程度更大,从提高信噪比的目标来衡量是值得的。
In complex areas,there is a large amount of complex interference,especially the very strong scattering noise.To suppress these disturbances,it is needed to spread the array,but this method result in increasing elevation to damage effective wave band.Through forward modeling,waveform and spectrum analysis methods,it is concluded that in the exploration of a complex area,elevation difference restriction of geophone array must be less than 1/4 main wavelength is too conservative to suppress interference by large array technology,Elevation difference restriction of geophone array is variable parameter as protected different seismic wavelength,signal to noise ratio and other factors.Relaxation of elevation difference restriction,despite suppressing to effective wave,will be slightly stronger,but if the interference wave is suppressed in a greater degree,then to measure the signal to noise ratio is worthy.
In complex areas,there is a large amount of complex interference,especially the very strong scattering noise.To suppress these disturbances,it is needed to spread the array,but this method result in increasing elevation to damage effective wave band.Through forward modeling,waveform and spectrum analysis methods,it is concluded that in the exploration of a complex area,elevation difference restriction of geophone array must be less than 1/4 main wavelength is too conservative to suppress interference by large array technology,Elevation difference restriction of geophone array is variable parameter as protected different seismic wavelength,signal to noise ratio and other factors.Relaxation of elevation difference restriction,despite suppressing to effective wave,will be slightly stronger,but if the interference wave is suppressed in a greater degree,then to measure the signal to noise ratio is worthy.
引文
[1]李庆忠.论地震次生干扰[J].石油地球物理勘探,1983,6(3):207-225.
[2]李庆忠,魏继东.论检波器横向拉开组合的重要性[J].石油地球物理勘探,2007,43(4):375-382.
[3]殷军,徐峰,杨举勇,等.库车地区宽线采集技术应用与效果[J].天然气工业,2008,28(6):49-51.
[4]张振宇.折射波法检波器二次定位[J].西南石油学院学报,2005,27(2):22-24.
[5]贺振华,胡光岷,黄德济.数学检波器与波动方程地震叠前正演[J].成都理工大学学报(自然科学版),2004,31(6):675-678.
[2]李庆忠,魏继东.论检波器横向拉开组合的重要性[J].石油地球物理勘探,2007,43(4):375-382.
[3]殷军,徐峰,杨举勇,等.库车地区宽线采集技术应用与效果[J].天然气工业,2008,28(6):49-51.
[4]张振宇.折射波法检波器二次定位[J].西南石油学院学报,2005,27(2):22-24.
[5]贺振华,胡光岷,黄德济.数学检波器与波动方程地震叠前正演[J].成都理工大学学报(自然科学版),2004,31(6):675-678.
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