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| The first arrival time picking up method for vibroseis seismic datasets |
| Ni Yu-dong1,2, Zu Yun-fei2, Li Hai-xiang2, Lei Yun-shan2 |
1. China University of Geosciences,Wuhan City,Hubei Province,430074,China;
2. Seismic Acquisition Technical Support Dept.,BGP.Inc of CNPC,Zhuozhou City,Hebei Province,072751,China |
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Abstract Nowadays for most vibroseis acquisition in China,common shot-point gather datasets were acquired by cross-correlating vibroseis scanning signal and the received signal by seismic recording system,this process was normally accomplished by hardware in seismic recording system.For the cross-correlation single shot record,the existence of the coherent noise reduces the signal to noise ratio of the first arrival,so the minimum phase processing for the record is needed before picking up the first arrival.By utilizing scanning signal or surface signal to conduct deconvolution processing for the seismic records,the signal to noise ratio of the first arrival can be improved and the first arrival taking-off can be much more clear so that the first arrival picking up accuracy and static accuracy can be raised.In low signal to noise ratio area,the HCI(Human-computer interaction)mode should be adopted,by changing display mode the first arrival taking-off effect can be improved and the accuracy for the first arrival picking up and the static correction can be raised.
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Received: 11 October 2009
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2010, Vol. 45 
