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一、过去的情况总结渭河地区五年来的地震勘探工作,我们对该地区的地震地质情况和沉积构造概貌以及速度规律等有了一定的认识。但是,由于研究程度不高,加之手段有限,所以对多次反射波的认识,只停留在怀疑阶段,不敢下结论。正如在过去的报告里指出的:“目前获得的资料是否全部反映深部地层,还得今后进一步考虑”。关于凹陷内存在多次波的问题,今年通过对速度谱的制作,才获得了新的认识,肯定了多次波的存在。
First, the past situation To summarize the five years of seismic exploration in the Weihe area, we have some understanding of the seismic geological conditions in the area, the outline of sedimentary structures and the velocity laws. However, due to the low degree of research and the limited means, the knowledge of multiple reflections is only in the stage of suspicion and can not be concluded. As the past report pointed out: “Whether all the information currently available reflects the deep strata has to be further considered in the future.” As for the problem of multiples in the depression, this year gained a new understanding of the production of the velocity spectrum and affirmed the existence of multiple waves.