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本文叙述在苏南金常地区为获得古生界海相地层内的反射波开展的方法试验。在这里使用经过低频改装的模拟磁带地震仪,进行六次到十二次的多次覆盖,通过选择合适的观测系统和多检波器面积组合等手段,尽可能地提高讯噪比。 该区断裂发育,岩层倾角大,地质结构复杂,浅层强反射界面影响了弹性波能量的下传,干扰波发育。在克服种种困难,取得野外地震资料后,通过小型电子计算机的处理,进行必要的速度分析,初步获得了较满意的海相地层内的地震反射波。
This paper describes a method test for obtaining reflected waves in Paleozoic marine strata in the Kim Chang-Chang region of southern Jiangsu. Here we use the simulated low frequency modified tape seismograph to perform multiple coverage of six to twelve times. By selecting suitable observation system and multi-detector area combination, the signal to noise ratio can be improved as much as possible. The fault developed, the rock dip angle is large, and the geological structure is complex. The shallow reflection interface affects the transmission of elastic wave energy and the development of disturbing waves. After overcoming all kinds of difficulties and obtaining field seismic data, the necessary velocity analysis was carried out through the processing of a small electronic computer, and the more satisfactory seismic reflection wave in the marine strata was initially obtained.