Tilt interference elimination method based on linear event iterative tracking attenuation
A linear interference and event technology, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of loss of effective reflection signals of long-range offset channels, strong amplitude spatial aliasing, misleading seismic geological interpretation, etc.
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[0029] In field seismic exploration, seismic waves are excited by sources such as explosives, air guns, or electric sparks, and seismic signals are received by geophones to obtain seismic records containing linear interference waves such as direct waves, refracted waves, or surface waves.
[0030] Sea area A is a hard seabed area, the seabed is relatively flat, and the water depth changes gently between 90 meters and 110 meters. Selected survey line X 1 It is about 45 kilometers long and uses 480 channels to receive. The shot interval and track interval are 50 meters and 12.5 meters respectively, the minimum offset distance is 170 meters, and the data sampling interval and record length are 0.004 seconds and 4.5 seconds respectively. Since the seabed is a strong reflection interface, the corresponding seismic data has strong direct wave and refracted wave interference, which seriously affects the subsequent processing effects of random noise attenuation, ghost wave elimination...
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