关键词: 多尺度, 反演, 剩余静校正, 周波跳跃

Abstract: The conventional inversion method for seismic residual static correction is analyzed, and the reason for it is found. The quality of model trace is related to the apparent cycle of seismic wave. As a relative quantity, when the static correction quantity is larger than a half or more of the apparent cycle, the model trace's quality becomes poor, emerging the cyclic-skip phenomenon using linear inversion method. According to this, the multiscale residual static correction method based on model trace is developed, by which the large static correction quantity issue under small scale can be converted into the small static correction quantity issue under large scale, thus avoiding the appearance of cyclic-skip phenomenon. The low accuracy of the large scale static correction can be considered at the same time. So the large static correction quantity calculation could then be realized by using the multiscale inversion algorithm. The case study shows that this method is effective, efficient and convenient for use.

Key words: multiscale, inversion, residual static correction, cyclic skip