Methods and systems for seismic data processing

A system for seismic data processing, comprising:

• a first determination module configured to determine, based on seismic data and logging information, target seismic data as a seismic trace near well;
• a second determination module configured to perform, based on a target calibration object, data processing on the logging information to determine a reflection coefficient sequence;
• a third determination module configured to extract seismic wavelets of the seismic trace near well, convolute the seismic wavelets with the reflection coefficient sequence, and determine a synthetic seismic record of the target calibration object in a time domain;
• a preliminary alignment module configured to:
• determine a sampling plan for the seismic trace near well and the synthetic seismic record, and for each sampling point in the sampling plan, determine, through a time window determination model, a size of a time window based on the seismic trace near well and the synthetic seismic record, the time window determination model being a machine learning model;
• truncate the synthetic seismic record and the seismic trace near well based on the time window to generate a truncated synthetic seismic record and a truncated seismic trace near well, respectively;
• convert a geological stratification in a depth domain into a geological stratification in the time domain and calculate an amount of time deviation between the geological stratification in the time domain and a seismic horizon;
• determine at least one correlation between the truncated synthetic seismic record and the truncated seismic trace near well under at least one time shift, wherein a range of values for the at least one time shift is determined based on the amount of time deviation;
• obtain a time shift corresponding to a maximum correlation in the at least one correlation as a global time shift based on the at least one correlation;
• and
• perform preliminary alignment on the synthetic seismic record through the global time shift and determine a preliminarily aligned synthetic seismic record.