齐家北地区表层吸收规律分析

陆上地震资料的高频信息大部分由近地表层所吸收,这是造成分辨率下降的主要原因。这里从微测井资料入手,根据测井数据中由深层激发至浅层激发所得到的信号,在振幅和频率等方面的变化信息,求取近地表层吸收反滤波器算子,绘制出近地表层吸收规律曲线和吸收规律的平面图,进而对齐家北地区的近地表层吸收规律进行了分析,给出了该区近地表层的吸收规律,为下一步进行近地表层吸收补偿提供了依据。

The absorbing analysis of near surface in Qijia bei area

Most of the high frequency will be absorbed by the near surface of the Earth for the seismic data of the Land, which is the dominating factor that makes the decline of seismic resolution. In this paper,we start with the information of micro-seismogram logs. Based on the amplitudes and frequencies which are obtained from the signal from deep formations inspiring to low formations inspiring, we figure out the inverse-filter factor of the near surfer of the earth, and draw curves of rules of the near surface of the earth and the ichnographies of the absorbing rules. Furthermore,we analyze the rules of absorption for the area of Daqing Qijia Bei,and bring out the absorption rules of this area, which will provide the groundwork for further attenuation compensation of the near surface.