苏南金常地区碳酸盐岩的地震方法试验

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。

SEISMIC EXPERIMENTS FOR OBTAINING REFLECTIONS FROM CARBONATITE RESERVOIR IN JIN-ZHANG REGION, SOUTH JEANGSU

This paper describs the experiments for obtaining reflections from Palaeozoic marine deposits in Jin-Chang region, South Jiangsu. In order to improve the signal-to-noise ratio as far as possible, the analogue seismograph with its low frequency refitted, the 6-12 multicoverage, the appropriate layout chart as well as the areal multi-geophone array have been adopted.The area is characterized by its faults, its large strata inclination and its complicated geological structure. The strong refletion interfaces in this district prevent the elastic waves from propagating downwards. The noise is rather serious. Having made painstaking efforts and overcome many difficulties, now, acceptable reflections from marine deposits have been obtained by computerizing and the velocity analysis.