中值滤波在井间地震资料处理中的应用

Median filter in seismic crosshole data processing

中国石化石油勘探开发研究院南京石油物探研究所,江苏南京 210014

Institute of Geophysical Prospecting, SINOPEC Research Institute of Petroleum Exploration and Production, Nanjing 210014, China

中值滤波是一种简便有效且信号失真较小的信号处理方法。在不同的道集域下,井间地震资料中的直达波、一次反射波和多次反射波在相邻道间的时差具有不同的表现形式,利用这一特点,应用中值滤波在不同道集域内对井间地震资料进行滤波处理,可以得到很好的效果。利用实验室复杂地质模型地震数据,进行了中值滤波压制噪声、突出有效信号,以及波场分离等处理方法的研究,最终得到了很好的上、下行反射波波场。

Median filter is a simple, effective and little signal distortion way in signal processing. The direct arrivals, primary reflections or multiple reflections wave moveout between two adjacent traces are difference in different gathers of crosshole seismic data with high resolution, the seismic crosshole data of complex model are processed by medial filter in different gathers, and supplies the proper result of wavefield separation, in the meanwhile, it provides a good basis to seismic crosshole imaging of reflections wave.