压电式检波器在高分辨率地震勘探中的试验研究

Experimental study on piezoelectric geophone in high resolution seismic exploration

随着勘探地区和勘探目标的复杂化,高分辨率地震勘探得到了快速发展。作为高分辨率地震勘探的源头——高品质地震数据的采集,传统动圈式电磁感应检波器已不能满足要求,于是一种更适合高分辨率地震勘探的地震检波器——陆地压电式加速度检波器的研究受到了广泛重视。从传统动圈式电磁感应检波器和压电式加速度检波器基本结构和工作原理出发,详细分析了两种检波器对振动的响应特性。在同等野外条件下,进行了压电式加速度检波器和传统动圈式电磁感应检波器的采集试验与对比分析,结果表明,压电式加速度检波器固有的宽频带、高灵敏度可以满足高精度地震勘探的需要。

With the increase of complexity of exploration area and tar- gets,high resolution seismic exploration has achieved a fast devel- opment.The acquisition of high-quality seismic data is regarded as the source of high resolution seismic exploration and the traditional electromagnetic velocity geophone cannot meet the requirement. Therefore,land piezoelectric acceleration detector which is more suitable for high resolution seismic exploration attracts much atten- tion of scholars.From the basic structure and operational princi- ples,the response characteristics of the two geophones on oscilla- tory are described in detail.In the equal field conditions,acquisi- tion testing and comparison have been carried out on the two geo- phones.The results show that the build-in wide frequency width and high sensitivity of land piezoelectric acceleration can satisfy the demands of high resolution seismic exploration.