Technique of suppression of bubble oscillation in marine seismic exploration in shallow water

Abstract

Also, as electric spark and electrodynamic sources, used mainly in works of the upper part of the section, non-explosive sources, which have become widespread, include pneumatic sources. This type of sources meets all the requirements for geophysical equipment. The main problem of such kind of sources is the presence of intense pulsations, long duration of the emitted signals, as well as not very reliability of some clusters.
Especially topical is the problem of pulsations during the shallow water acquisitions. The shallow water depth does not allow to extract the signature acceptable for the construction of the effective operator from the data due to the interference of pulsations from the direct wave with the bottom, and the suppression operator which extracted from the theoretical signature, often gives an unacceptable result.
To solve the bubble oscillation problems in shallow-water acquisition, it is proposed to use combined information of bubble oscillation extracted from a direct wave, extracted from bottom reflection, waveform predicting deconvolution and adaptive subtraction algorithms.