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北部湾 W10-3构造的垂直地震剖面(VSP)测量是在钻井平台上进行的,采用水枪作震源,地震数字测井仪记录,采样率1毫秒,采样间隔20—50米,偏移距50—60米。在资料处理时,除了使用了地面地震的常用手段以外,还做了分离上行波、下行波、侧面波等处理,并有相应的显示剖面。结果表明,VSP 资料提高了信噪比以及对薄层的分辨率,突出了深层弱反射波,提供了更高精度的速度资料。
Vertical seismic profile (VSP) measurements of the Beibuwan W10-3 structure were performed on a drilling rig using a water gun as a seismic source recorded by a seismic digital logging tool at a sampling rate of 1 millisecond with a sampling interval of 20-50 meters and an offset of 50 -60 meters. In data processing, in addition to the use of commonly used means of ground-based earthquakes, but also made a separation upstream, downstream, side waves and other processing, and the corresponding display section. The results show that the VSP data improves the signal-to-noise ratio and the resolution of the thin layers, highlights the deep weak reflected waves and provides more accurate velocity data.