低信噪比条件下地震叠加速度的提取技术

STUDY OF SEISMIC STACK VELOCITY EXTRACTION TECHNOLOGY FOR LOW SNR DATA

摘要: 主要讨论了如何针对低信噪比地震资料进行更加精确的叠加速度提取问题。首先介绍了叠前多域LIFT去噪以及共反射面元叠加(CRS)等关键技术以提高地震数据的信噪比;其次研究了基于相位相关的连续速度分析方法以提高叠加速度提取的精度;最后总结出一套精确提取低信噪比条件下地震叠加速度的方法。

Abstract: This paper mainly deals with the technique to precisely extract stacking velocity for low SNR seismic data. At first, the LIFT for pre-stack multi-domain de-noises technology and the common reflection surface stack technology were introduced, to improve the SNR seismic data. Then, a new method of continuous velocity analysis based on e phase correlation was presented to improve the precision of the extraction of stack velocity. Finally, a set of methods for accurate extraction of seismic velocity under the low SNR condition was summarized.