Method for removing ship-crossing interference noise in marine seismic exploration

Abstract

The invention discloses a method for removing ship-crossing interference noise in marine seismic exploration. The method comprises the steps of 1) firstly performing dynamic correction on shot gatherdata after abnormal noise removal, 2) performing TAUP conversion on shot gather time-space domain data, 3) rearranging the data subjected to TAUP conversion in a P-shot-TAU arrangement mode, and 4) effectively removing ship-crossing interference by adopting an abnormal amplitude noise removal method, removing the ship-crossing interference and then performing reverse operations of steps 3), 2) and1), 5) performing P-channel reverse arrangement, and inversely transforming the arrangement mode of P-shot-TAU into the arrangement mode of shot-P-TAU; 6) inversely transforming TAUP into a TX domain; and 7) performing reverse correction, eliminating the influence of dynamic correction, restoring normal shot gather data, and completing the elimination of ship-passing interference noise. Accordingto the scheme, the TAUP domain P-channel rearrangement abnormal amplitude is adopted to remove the ship-crossing interference, the suppression of linear interference and hyperbolic and inverse hyperbolic ship-crossing interference can be achieved at a time, the effective signal protection effect is better, batch processing can be achieved, and high practical application value is achieved.

Description

technical field [0001] The invention relates to the field of marine seismic survey data processing, in particular to a method for removing interference noise of marine seismic survey passing ships. Background technique [0002] During the process of marine seismic acquisition, it is often easily affected by passing ships, so it is inevitable to receive interference noise from passing ships. According to the position of the interfering ship and the cable, the passing ship interference has various manifestations in the single shot record, such as figure 1 As shown, the main performance is linear form, positive hyperbolic, anti-hyperbolic and other forms. The apparent speed of the ship-passing interference varies with the position of the interfering ship and the cable, and the range of the apparent speed is very wide without obvious rules. Depending on the position of the ship and the cable, the appearance of the interference noise of passing the ship on the superposition sect...

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Problems solved by technology

[0005] 1. There are two main problems for the linear interference method to remove the ship-passing interference: (1) Since the apparent velocity of the ship-passing interference is not fixed, the filtering parameters are difficult to fix, resulting in the need to adjust the filter parameters according to the change of the apparent speed of the ship-passing interference, The efficiency is extremely low, and it is also difficult to process in batches; (2) the linear interference removal method is difficult to remove the interference noise of the hyperbolic shape, because at the apex of the interference noise of the hyperbolic shape, its apparent speed is consis

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