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《Progress in Geophysics》 2012-01
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Methods and applications for improving pre-stack seismic data resolution

WAN Huan1,FAN Xiao-yi1,LIU Tao1,REN Ke-ying2,LIU Ming-quan2, ZHANG Hong-bing3,CAO Cheng-hao3(1.Oilfield Engineering Research Institute of CNOOC,Tianjin 300452,China; 2.Zhanjiang Branch of CNOOC Ltd.,Zhanjiang 524057,China; 3.College of Earth Science and Engineering,Hohai University,Nanjing 210098,China)  
The precision of seismic reflection data does not fulfil to explore private and complex structure oil gas accumulations.So we need to improve the resolution of the seismic data.To achieve this,we processed the pre-stack seismic data in Weixinan using four methods of improving the resolution,namely the inverse Q filter,the generalized S transform,the spectrum anaplasty and the spectrum whitening.We compare the processing results for four methods.The results indicated that those methods can improve peak frequency and frequency bandwidth,where the result for the inverse Q filter is best and the result for the generalized S transform takes second place.Low and middle-high frequency components are reasonable in the result for the inverse Q filter,and its signal/noise ratios are obviously larger than that for other methods in middle-high frequency.Moreover,the results using various Q values indicated that the peak frequency and the frequency bandwidth are little reduced when Q value is increasing,but the signal/noise ratio is increasing.The signal/noise ratio is not obviously improved very small when Q value is larger than 200.0.Then we only gain reducing of the peak frequency and the bandwidth adding Q value again.
【Fund】: 国家重大专项项目(2008ZX05023)资助
【CateGory Index】: P631.44
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