浙东深地震反射采集参数试验

Experimental Study on Parameters of Deep Seismic Reflection Acquisition in Eastern Area of Zhejiang Province

为了查明浙东地区深部构造信息,在该区域布设了一条18 km长的深地震反射剖面,并开展了深地震反射采集参数试验。本次试验采用炸药震源、法国产428XL 24位A/D转换数字地震仪和DSU1单分量数字检波器,采样间隔2 ms、道间距15 m、记录长度20.0 s,主要针对激发因素进行了较为全面的试验工作,并从实践出发对数字检波器的效能进行了分析。通过对不同激发参数原始单炮记录中目的层信噪比的比较,确定了在采用数字检波器情况下适合于该地区的最佳激发参数。

In order to find out the deep tectonic information in the eastern area of Zhejiang province,one deep seismic reflection profile having 18 km long was arranged in this area and a parameters test of the deep seismic reflection acquisition was carried out.This test applied the explosive source,the 428XL24-bit A/D conversion digital seismometer made in French and the DSU1 single component digital detectors. The sampling interval of this test was 2 ms,the track spacing was 15 m and the record length was 20.0 s. This test comprehensively finished the experimental work on motivating factors,and analyzed the performance of the digital detectors in practice.By comparing the signal-to-noise ratio of the target layers in the original single-shot record with different excitation parameters, the optimal excitation parameters suitable for the region are determined in the case of applying digital detectors.