Method and device for detecting electric leakage crosstalk noise

Abstract

An embodiment of the invention discloses a method and device for detecting electric leakage crosstalk noise. The method comprises the following steps: acquiring an original shot gather record of shotson a seismic acquisition line; increasing the energy difference between the electric leakage crosstalk noise signal in the original shot gather record and other seismic wave signals except the electric leakage crosstalk noise signal to obtain a processed shot gather record; and determining a detection result of the electric leakage crosstalk noise in the cable by utilizing the processed image information recorded by the shot gather.

Description

technical field [0001] The embodiments of the present application relate to the field of offshore oil geophysical exploration, especially to a method and device for detecting electric leakage crosstalk noise. Background technique [0002] The cables used in marine seismic exploration are solid cables, and the geophones are packaged inside the cables. After long-term use, some leakage and crosstalk noises will be generated due to internal leakage of cables or signal interference. This is inevitable, but how to find out in time, It is very important to solve the leakage crosstalk, reduce the bad shot rate, reduce the impact on seismic data, and eliminate hidden dangers of equipment. [0003] figure 1 Schematic illustration of leakage crosstalk noise recorded in shot sets from solid cables used for marine seismic exploration. Such as figure 1 As shown, the leakage crosstalk noise is a pulse signal formed by a combination of peaks and valleys. The inspection method in relate...

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Problems solved by technology

The inspection method in related technologies is shot-by-shot playback inspection. There are tens of thousands of shots in a survey line. If such noise occurs randomly in a survey line, it will take a lot of time to play back shot-by-shot inspection, which is tantamount to finding a needle in a haystack, and crosstalk will There is a process from weak to strong. When the crosstalk noise is weak, it is difficult to identify it with the naked eye on a single shot set. Therefore, the traditional method has problems of low inspection efficiency, untimely discovery, low accuracy, and incomplete investigation. Affected the quality control efficiency of on-site seismic data, and there was a big quality hidden danger

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