频谱均衡滤波器的改进
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摘要
地震勘探分辨率不高的主要原因是地层对地震波高频成分的吸收衰减 ,通过对地层吸收衰减深入的理论计算可知 ,既便使用 2 4位遥测地震仪 ,在中深层勘探中也无法记录主频超过 13 5Hz的地震波 .为了有效补偿地层高频吸收衰减 ,给出了时变频谱均衡滤波器的设计方案 ,此方案中电阻网络参数随时间而改变 ,使浅、中、深层的反射波均有合适的高频提升速率 ,实现了地震波高频成分的有效补偿 ,提高了地震勘探的分辨率
The main factor that affects the resolution of seismic prospecting is Earth's absorption and attenuation effect on high frequency signals. Study and calculation of Earth's absorption and attenuation effect show that medium deep and deep reflectors over 135 Hz can not be recorded even by 24-bit seismometers. To effectively compensate the Earth's absorption and attenuation effect on high frequency signals, a new kind of time variable SEF has been designed which can switch its parameter of resistor network according to time. This makes it possible to compensate high frequency components of shallow, medium and deep reflections with proper ratio, thus can improve the resolution of seismic prospecting.
引文
[1] 李庆忠 .走向精确勘探的道路 [M] .北京 :石油工业出版社 ,1993 .3 1~ 3 8.
    [2 ] 陆基孟 .地震勘探原理 (上册 ) [M] .山东 :石油大学出版社 ,1993 .5 0 .
    [3 ] 陈祖传 .发展适应我国需要的新一代物探仪器 [J] .石油仪器 ,1997,11(5 ) :3~ 10 .
    [4] 陈祖传 .新一代地震仪器发展的探讨 [J] .石油物探装备 ,1996,6(1) :1~ 9.
    [5 ] 袁子龙 ,田景文 .地震数据采集系统中频谱均衡滤波器的理论设计 [J] .石油仪器 ,1998,12 (5 ) :1~ 4

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