Journal of Tropical Oceanography >
Research on ghost suppression and notch compensation of dual-sensor ocean bottom cable data
Received date: 2017-05-26
Request revised date: 2017-07-04
Online published: 2018-04-11
Supported by
Foundation item: National Science and Technology Major Project (2011ZX05006-002)
Copyright
Because of the influence of strong reflection interfaces such as free surface, seabed, etc., the ghost produces obvious notches in ocean bottom cable (OBC) spectra. It degrades the quality of sections, and increases the difficulty of processing and interpretation. According to different responses of hydrophone and geophone to down-going wave field, we present a new dual-sensor summation method based on pseudo-multichannel matching filter. Compared with traditional methods, the proposed method is totally data driven, so it does not depend on the reflection coefficient. In practical applications, the method can effectively suppress ghosts, remove notches and expand spectral bandwidth. The good results reveal the effectiveness of this method.
Key words: ocean bottom cable; notch; ghost; dual-sensor summation; pseudo-multichannel
LI Jiguang , WANG Dongkai . Research on ghost suppression and notch compensation of dual-sensor ocean bottom cable data[J]. Journal of Tropical Oceanography, 2018 , 37(2) : 100 -104 . DOI: 10.11978/2017063
Fig. 1 Schematic diagram of dual-sensor OBC processing technology. a) Hydrophone and geophone data simulated by Ricker wavelet, the resulting dual-sensor data; b) amplitude spectra corresponding to records in panel a图1 双检合成原理示意图 |
Fig. 2 Geological model for dual-sensor data forward modeling图2 海底电缆双检数据正演模型 |
Fig. 3 Synthetic OBC seismic data computed from the model in |
Fig. 4 Spectra of synthetic dual-sensor data in |
Fig. 5 OBC data acquired from Shengli Oilfield. a) Real geophone data; b) real hydrophone data; c) result of dual-sensor summation based on pseudo-multichannel adaptive matching filter; arrows point to primary waves图5 实际资料处理效果图 |
Fig. 6 Spectra of dual-sensor OBC data in |
Fig. 7 Comparison of stack from OBC seismic data in |
The authors have declared that no competing interests exist.
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