三分量数据的偏振分析及其应用

The analysis of polarization in three component seismic data and its application

1. 南京地矿部石油探研究所, 南京210014;2. 地矿部东北石油地质局大信公司, 长春130062

Research Institute of Deophysical Prospecting for Petroleum, Nanjing 210014

地震记录中存在多种类型的波,它们的质点振动轨道表现出不同的特征。偏振分析技术能够定量地表征质点振动轨迹,因此,利用质点偏振不同的特征(偏振系数,偏振方向,传递函数等)进行压制面波、分离纵波和转换波的偏振滤波处理是可行的。本文对模型实验室三分量数据和实际地震三分量记录进行偏振分析研究,并做压制面波、分离纵波和转换波的处理,取得了较好的效果。

There are various waves in a seismic record. The vibrating traces of their particles aredifferent in character. Polarization analysis technique can charactcrize the vibrating tracesquantitatively. Therefore,it is feasible for us to implement polarization filtering, such as surfacewave suppressing, P-wave and converted wave separating, by use of different polarizationcharacters (polarization coeffcient,polarization direction,transfer function ctc. ). In this paper, wedescribe our work where polarization analyzing. surface wave suppressing, and P-wave andconverted wave separating are finished on the three component data both from model laboratoryand field survey. The results obtained ate satisfying.