海底地震仪数据处理及应用
发布时间:2017-12-30 18:12
本文关键词:海底地震仪数据处理及应用 出处:《海洋地质与第四纪地质》2016年03期 论文类型:期刊论文
更多相关文章: 海底地震仪 广角地震 成像处理 纵横波波速比
【摘要】:海底地震仪(OBS)探测在国内进入了快速、自主发展的阶段,并得到广泛应用。目前国内OBS探测以国产仪器及国内科研队伍为主,主要用于海底地壳结构研究及海洋地震监测。介绍了国内OBS广角地震数据处理及速度成像的主要方法,并综合分析了前人提供的不同岩性纵横波速比特征。(1)OBS数据处理包括解编、裁截、时间和位置校正、水平分量旋转(横波处理特有)及其他增强信噪比、提高分辨率的过程。(2)利用rayinvr拟合来自不同界面的反射及折射纵横波,完成已识别震相的确认,得到合理的速度结构。(3)纵横波速比与岩性、孔隙填充物及孔隙度等压实因素息息相关。不同岩性的岩石Vp/Vs与波速的关系分布在不同的区间内,未压实的沉积层普遍具有较高的波速比,含有流体的岩石比含有气体的岩石泊松比要高。
[Abstract]:OBS (OBS) detection in China has entered a rapid development stage, independent, and widely used. At present, the domestic OBS detection using domestic instruments and domestic scientific research team, mainly used for undersea research of crustal structure and marine seismic monitoring. This paper introduces the main methods of domestic OBS wide-angle seismic data processing and imaging speed, and comprehensive analysis of the different lithology of previous researches of shear wave characteristics. (1) OBS data processing including decoding, cutting, time and position correction, rotation of horizontal component (shear wave and other special processing) enhance the SNR, improve the resolution process. (2) using rayinvr fitting from different interface reflection and refraction wave, complete recognition of seismic phase confirmation, get reasonable speed structure. (3) and shear wave velocity is closely related to lithology, pore fillings and porosity of rock compaction factors. Different lithology and wave Vp/Vs The relation of velocity is distributed in different intervals. The UN compacted sedimentary layer generally has higher wave velocity ratio, and the rock with fluid is higher than the Poisson's ratio of rock containing gas.
【作者单位】: 中国地质大学(武汉)地球物理与空间信息学院;
【分类号】:P716.83
【正文快照】: 海底地震仪(Ocean Bottom Seismograph,简称OBS)是一种将地震检波器直接放置在海底的流动地震观测台阵。它的主要组成部分包括地震计、水听器、采集记录单元、释放单元及辅助设备等[1]。目前天然地震探测主要使用长周期OBS,短周期OBS主要应用于海洋人工地震勘探。其结果可以用,
本文编号:1355868
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