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一、井间地震扫描是在一口井内放置震源,在另外一口井接收而获得地震记录。在井内不同深度处放置许多震源与检波器,地震射线便可以详细覆盖井间的岩石剖面。因为测量是在损耗很强的覆盖层及风化带下进行的,所以能够利用高频、短波长的地震波求解大部分类型岩石中的细结构,尽管在井间地震图中存在着反射波,但我们所感兴趣的是透射波,例如井间穿透岩石的直达P波或S波波至。直达波的走时及振幅能够反演产生描述井间地质横剖
First, cross-well seismic scanning is to place the source in one well and receive the seismic record in the other well. Many sources and geophones are placed at different depths in the well. Seismic rays can cover the cross-section of the rock in detail. Because measurements are carried out under highly overburden and weathering zones, high-frequency and short-wavelength seismic waves can be used to solve fine structures in most types of rocks. Although there are reflected waves in cross-well seismograms, What we are interested in are transmitted waves, such as direct P-wave or S-wave waves that penetrate rocks across the well. The travel time and amplitude of direct waves can be inverted to describe the geological cross-section between wells