Non-consistent time-lapse seismic prestack cross equalization processing method based on pseudo multichannel matching

The invention discloses a non-consistent time-lapse seismic prestack cross equalization processing method based on pseudo multichannel matching, which comprises the steps of inputting two periods of seismic data repeatedly acquired in a non-consistent mode, and extracting prestack time migration channel set to act as data preparation; solving data of a derivative channel, a Hilbert channel and a Hilbert channel data of a derivative of monitoring data; representing basic data to be a function of a monitoring data original channel, the Hilbert channel, the derivative channel and the Hilbert channel data of the derivative, and solving four matching factors corresponding to the four channels; carrying out convolution summation on the matching factors and the monitoring data, and realizing pseudo multichannel matching of the monitoring data and the basic data; and solving the difference between the monitoring data and the basic data after matching, acquiring a post-stack difference profile of the two periods of data, and highlighting the difference brought about by fluid substitution caused by oil reservoir exploitation. The method disclosed by the invention takes the pre-stack migration channel set of the two periods of data as data information, an appropriate time window is selected, more channel set information is utilized, and the precision and the efficiency of non-consistent time-lapse seismic cross equalization processing are improved.