复杂地表区低信噪比地震资料处理技术

The processing technique for low S/N ratio data in complex surface area

胜利石油管理局物探研究院,东营257100

Geophysical Academy of Shengli Petroleum Administration, Dongying 257100

对复杂地表区资料处理中存在的静校正问题与低信噪比问题进行了分析与研究。在大量试验及分析的基础上,采用近地表校正与折射波静校正相结合的方法,有效解决了因地表起伏大、低降速带复杂所造成的野外静校正问题。对于面波、低频干扰、大野值、声波、高频随机干扰、工频干扰等造成信噪比降低的因素进行了针对性的压制与消除。

In this paper, the problem about the static correction and low S/N ratio in the complex surface seismic data are analyzed and studied. Based on a large amount of experiments and analysis, the method that near surface correction combine with refraction static correction is adopt for solving the problem in the field static correction because of the complex surface and low velocity layer effectively. The factors, such as surface wave, low frequency disturbance, large wild value, sonic wave, high random disturbance and industrial frequency disturbance, are suppressed which caused the low S/N ratio of the seismic data. The different in the wavelet and the band of shots, is solved effectively with the match filtering and surface consistency processing method.