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《Progress in Geophysics》 2007-03
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Spectral borrowing stretch-free normal moveout correction

CUI Bao-wen1,2,WANG Wei-hong3(Jilin University,Changchun 100029,China;2.Department of Reservoir Evaluation of Daqing Oilfield Corp.Ltd.,Daqing,163712,China;3.Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China)  
Normal moveout(NMO)stretch is a fundamental problem in seismic data processing,muting is one of attempts to solve NMO stretch.The long offset is adopted in modern seismic acquisition,therefore NMO stretch is more severe in seismic processing.The spectral borrowing stretch-free NMO approach is proposed in this paper based on convolutional model and the properties of Fourier transform.Transform the CMP to temporal frequency domain,take the minimum-offset-trace as reference trace,and borrows that phase spectrum to substitute the original traces in CMP gather.The proposed technique need no stack velocity data of formation under investigation,the given method can finish NMO processing automatically,and has high efficiency in calculation.The spectral borrowing stretch-free approach can keep the AVO effect unaffected during the course of NMO processing,and also process whatever long offset seismic data easily.Theoretical model seismic data NMO and the stack result demonstrate that the proposed technique is validity and applicable,and the spectral borrowing stretch-free NMO approach can process noisy seismic data.
【Fund】: 中国博士后科学基金项目(20060400229)资助
【CateGory Index】: P631.44
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