1 CNPC Key Geophysical Laboratory,China University of Petroleum,Beijing,102249,China;
2 Technique Center of China National Logging Corporation,CNPC,Xi'an,Shanxi,710021,China
Abstract：Based on the wavelet decomposition and its reconstruction theory,we propose here a method to reconstruct wide-band wavelets.Different seismic wavelets can be reconstructed in this way.In virtue of complex frequency B-spline wavelet,we form a wide-band B-spline wavelet with four parameters and deduce its analytic expressions both in the time domain and in the frequency domain.The side lobes and phase numbers of the wide-band B-spline wavelet with four parameters can be easily adjusted through its parameter.In comparison with the Ricker wavelet and wide-band Ricker wavelet in the condition of the same main lobe equivalent frequency,the wide-band B-spline wavelet with four parameters not only has smaller side lobe but also has shorter non-zero time length.The synthetic result of wedge model indicates that the wide-band B-spline wavelet with four parameters has higher resolution and its parameters are easily adjusted.Therefore,it is a seismic theory wavelet more conveniently to be used in seismic data processing.
刘兰锋, 曹思远, 王鲁. 四参数宽带B样条子波[J]. 石油地球物理勘探, 2011, 46(2): 247-251.
LIU Lan-feng, CAO Si-yuan, WANG Lu. Wide-band B-spline wavelet with four parameters. OGP, 2011, 46(2): 247-251.
