【摘要】 针对华北探区地震资料的特点,从叠前系列保真去噪、振幅处理、偏移速度场建立方面介绍了叠前时间偏移特色配套处理技术。首先介绍了叠前系列保真去噪处理技术,主要包括面波压制、摘除法50Hz工业干扰压制、脉冲噪声压制、地表一致性异常振幅剔除等,通过应用这些技术可以有效净化道集,提高叠前道集的品质,重点介绍了使用自主研发的基于覆盖次数的振幅处理技术,有效解决了由于覆盖次数严重不均匀造成的偏移画弧问题;最后介绍了基于偏移速度扫描建立的高精度叠前时间偏移速度场技术。这些特色配套处理技术在华北探区得到了很好的应用,收到了良好的效果。更多还原

【Abstract】 In view of the characteristics of seismic data in Huabei exploration area,the special systematic prestack time migration techniques are introduced from the perspectives of the prestack systematic noise suppression,the amplitude processing,and the establishment of migration velocity field.Firstly,the systematic prestack noise suppressing technique is introduced,which includes the surface wave suppression,the 50Hz commercial disturbance suppression based on excavation,the impulse noise suppression,and the surface-consistent abnormal amplitude removal.Through applying these techniques,the trace gathers can be effectively purified and the quality of prestack trace gathers can be improved.The application of the amplitude processing technique based on fold number is mainly introduced,because it is independently developed and effectively solves the arc problem in seismic migration caused by severe imbalanced fold number.Finally,the high-precision prestack time migration velocity field technique established by using migration velocity scanning is introduced.All these special systematic processing techniques have been well applied to the Huabei exploration area,and good application results have been obtained.更多还原