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| Method of harmonic noise elimination in slip sweep data |
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HUANG Jian-ping1,ZHOU Xue-feng2,GUO Jun2,WANG Fang-chao3,SHI Fei2,LI Zhen-chun1
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(1. School of Georesources in China University of Petroleum, Qingdao 266580, China;2. Tianjin Branch, Research Institute of Petroleum Exploration & Development in CNOOC Limited Company,Tianjin 300451, China;3. CNOOC EnerTech-Supervision & Technology Company, Tianjin 300451，China)
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| Abstract: |
| A new method of eliminating harmonics for slip sweep recording was presented using the pure phase shift filter. The phase spectrum of each harmonic components from the ground force obtained by recording or statistics was computed. Tlien the procedure of pure phase shift operation was taken and a favorable filter was designed to eliminate the harmonica. The results show that this method is robust，fast and can be easily implemented. Using only the ground force and the start times of the sweeps, it can remove the harmonics in slip sweep data effectively，and it is applicable for real-time processing. |
| Key words: seismic data processing slip sweep harmonic distortion pure phase-shift |
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