黄土塬非纵地震资料处理技术研究

鄂尔多斯盆地黄土塬地区近地表环境复杂,地震采集激发、接收条件差,导致地震资料信噪比低。使用非纵地震勘探方法可在干扰波调查的基础上通过合理的设计避开近地表干扰,得到相对高品质的地震资料。相应的处理工作首先对原始资料处理获得二维剖面,而后通过叠后插值模拟三维数据体。除了黄土塬地区地震资料普遍面临的问题外,非纵地震资料又有其自身的特点,静校正、提高信噪比、保真保幅处理和速度分析等是其中比较突出的问题。本文介绍了非纵地震采集的基本原理,其资料处理过程中面临的问题和实际工作中用以解决问题的典型处理技术,最后以某工区实际地震剖面为例展示了非纵地震资料处理技术的应用效果。

The Study of Off-line Seismic Data Processing Technology on Loess Plateau Regions

Loess regions in Ordos Basin have complex near- surface environment, poor seismic excitation and acquisition conditions, so the SIN ratio of seismic data in these regions is low. The application of off-line seismic data can avoid near- surface interference through well designed acquisition based on the analysis of inference wave, and improve the quality of seismic data. The processing begins with 2D sections, and then 3D data volumes are simulated through post-stack interpolating. Except for the problems in off-line seismic data processing, the data have its own characteristics： static correction, SIN ratio, relative amplitude preserved processing, and velocity analysis. In this paper, the fundamental principle of off-line acquisition is introduced, and then the problems in processing of off -line seismic data and typical technologies to solve them are analyzed. Finally, a contrast of offline seismic section and straight-line section is posed to show the application effect of offline seismic data processing.