新型陆用压电检波器在滩浅海地区地震勘探中的应用及效果

Application of novel land piezoelectric detector and its effect in sea shoal seismic exploration

1. 中国地质大学,北京 100083;2. 中国石化胜利油田物探公司,山东东营 257100

China University of Geosciences, Beijing 100083, China

滩浅海地区所特有的复杂地表和表层结构条件给采集高品质的地震资料带来了一定的困难,也因此成为制约该类地区油气开发的主要因素之一。为此,开展了滩浅海地震水陆两用压电检波器的研究。阐述了陆用压电检波器的工作原理,分析了陆用压电检波器的实际应用效果。从单炮记录和地震剖面的信噪比、分辨率、频宽、主频以及能量等诸方面将其与AG3加速度检波器、常规检波器以及水上压电检波器进行了对比分析。结果表明,相对于其他检波器来说,在频谱、分辨率以及高频响应方面,陆用压电检波器在滩浅海地区采集的地震数据具有明显的优势,且陆用压电检波器具备了水听器的一些功能,能够解决滩、浅海结合部的过渡问题。

The peculiar surface and near-surface structures in sea shoal impede acquiring seismic data of high quality. This paper studies the operating principles of novel land piezoelectric detector and compares the novel land piezoelectric detector with AG3 accelerometer, conventional geophone, and hydrophone in terms of S/N in shot record or seismic sections, resolution, bandwidth, dominant frequency, and energy. It is concluded that the novel land piezoelectric detector has advantages over other types of gepphones in frequency spectrum, resolution, and high frequency responses, and has some functions of hydrophone. The novel land piezoelectric detector can be used in seismic data acquisition in sea shoal.