【摘要】 偏移速度是影响偏移效果的关键因素。本文提出了四种新的基于广义Radon变换的偏移速度谱计算方法,即具有时间域和深度域表现形式的叠加偏移速度谱和相似度偏移速度谱。文中首先对广义Radon变换在实际数据上的偏移效果进行了验证,然后对这四种偏移速度谱进行了实际计算。其结果表明,偏移速度谱一般要比叠加速度谱易于解释;深度域偏移速度谱要比时间域偏移速度谱的分辨率高、连续性强,易于解释;而相似度速度谱的效果要好于叠加速度谱。更多还原

【Abstract】 Migration velocity is the key factor which influences the migration result. In the paper, we put forward four new methods for making migration velocity spectra by using generalized Radon transform, namely, stack migration velocity spectrum and semblance migration velocity spectrum,both of which can be computed in either time domain or depth domain. Performance of generalized Radon transform imaging was tested using real data, then four kinds of migration velocity spectrum were computed practically. Finally, we come to the conclusion: migration velocity spectrum can be easier interpreted than stack velocity spectrum; depth-domain migration velocity spectrum has higher resolution, better continuity and is easier interpreted than time domain migration velocity spectrum; and semblance migration velocity spectrum has better performance than stack migration spectrum.更多还原