可控震源高保真地震数据采集方法

High fidelity virbroseis seismic data acquisition.

可控震源高保真地震数据采集(HFVS)是通过从记录的震源驱动信号中分离出单台震源记录信号来实现多个震点同时进行数据采集的方法,通过增加绝对频带宽度、减少相关子波边叶畸变以及预置较稳定子波来提高震源数据分辨率。在地震采集施工中,使用HFVS方法所记录的数据量要显著高于常规方法,同时,HFVS方法利用震源驱动信号来对数据反演也大大提高了震源间的一致性和相位的稳定性,减小了信号中因谐波引起的幅值畸变。

The method of high fidelity vibroseis seismic data acquisition (HFVS) separated every vibroseis recording from the driving signals to get several vibration points’ data in the same time. Resolution of vibroseis data is improved by widening the absolute frequency band and suppressing distortion of correlation wavelet. In the field operation, HFVS have much more advantages than conventional methods, such as the consistency between vibroseis and the stability of phase is better, the distortion caused by harmonic wave is smaller by using the driving signal to invert data.