砂岩型铀矿地震勘探中可控震源激发参数试验

摘要

针对鄂尔多斯盆地东胜地区砂岩型铀矿成矿特点,开展可控震源的震源台数、震动次数、扫描时间、扫描频率、驱动电平、扫描信号斜坡等激发参数试验,确定了较适用于该区的激发参数取值：震动台次2台×6次,扫描时间12 s,扫描频率15~100 Hz,驱动电平60%,扫描信号斜坡0.3 s。采用这些参数可提高该区砂岩型铀矿地震原始资料的信噪比和分辨率。%The shooting parameters of vibroseis system were tested to identify the features of sandstone type uranium deposits of Dongsheng area in Ordos basin. The shooting parameters include number of vi-broseis system,shaking time,scanning time,range of scanning frequency,drive energy and the width of the scanning signal slope. The suitable value of the parameters for the research area was obtained as follows:2 vibroseis system and 6 shaking times with 12 seconds scanning time,1 5—100 Hz scanning frequency with 60% drive energy and 0.3s. scanning signal slope width,which increased the noise-signal ratio and resolution ratio of seismic original data.