摘要
由于地层介质对地震波的选频吸收作用以及数字地震仪器记录动态范围的有限性，使得同一时刻弱的高频信号与强低频信号可同时记录的能力受到了限制，从而也制约了地震记录分辨率的提高。本文通过对两个地层吸收衰减模型的试算结果分析表明，合理地选择震源子波可部分地补偿大地对高频信号的吸收，使有效波高频记录极限提高30HZ到40HZ或更高，从而改善了记录的分辨率。
The capability of recording both weak high-frequency signals and strong low-frequency signals simultaneously is limited by the selective absorption function of stratigraphic media and the finite dynamic range of digital seismic recorder, which restricts the improvement of seismic record resolution. The trial computational results for two absorption and attenuation models demonstrate that the high-frequency signals absorbed by the earth can be partly compensated via the choice of sultable source wavelets. This way raises the high-frequency recording limit of effective waves by more than 30 Hz. Thus the resolution of seismic records is improved.
出处
《石油物探》
EI
CSCD
北大核心
1998年第4期80-84,共5页
Geophysical Prospecting For Petroleum
关键词
炸药
震源
有效地震波
高频可记录性
地震勘探
explosive source, high frequency recordability of effective seismic wave, resolution
