基于伪多道匹配法的地震波形一致性校正方法

WAVEFORM CONSISTENT CORRECTION BASED ON PSEUDOMULTICHANNEL MATCHING METHOD

由于在激发、接收和传播过程中受到众多干扰因素的影响,地震反射波形发生畸变,严重影响到叠加剖面的质量,因此,在叠前需要进行波形一致性校正。笔者针对单道匹配法的不足,引入伪多道匹配法,对地震波形的振幅、相位和时间进行高精度一致性校正,并能保持波形保真,提高叠加效果。模型测试和实际数据处理结果证明了本方法的有效性和适应性,在低信噪比资料处理中也可以获得比较好的效果。

Because of numerous interference factors in stimulating, receiving and propagating processes, the waveform of the reflected wave is distorted in the data, which will affect the quality of the stacking section. Therefore, waveform correction is the chief factor which should be considered before stacking. This paper brings forward the pseudomuhichannel matching method aiming at remedying some de- fects in the single channel matching method. The proposed method has higher precision in amplitude, phase and travel time, and can ac- quire good effect in the low signal-to-noise data. In addition, it can gain waveform fidelity and improve the quality of the stacking sec- tion. Its validity and applicability have been proved by the processing of seismic data.