A method of fast reading massive shot data of seismic acquisition based on two-level index

Efficient exploration technology leads to the rapid growth of seismic acquisition data; how to improve the big shot I/O efficiency has a direct impact on field acquisition speed. Considering the construction environment and actual requirements of the field acquisition operation site, this study proposes a two-level index method for a big shot to improve its I/O speed by thoroughly studying the storage structure of the shot file. This method instantly locates the boundary location of any full shot, arrangement, and any trace of massive shot files through the two-level index and eliminates the time to find a shot or trace in order, to realize the rapid reading of shot, arrangement, or trace data. The practical application shows that this method greatly improves the efficiency of searching the starting position of a shot in the file, thereby improving the I/O speed of the big shot and laying the groundwork for comprehensively improving the field quality control efficiency and data processing efficiency of field seismic acquisition.