本文關(guān)鍵詞：海底地震儀數(shù)據(jù)處理及應(yīng)用　出處：《海洋地質(zhì)與第四紀(jì)地質(zhì)》2016年03期 　論文類型：期刊論文

  更多相關(guān)文章： 海底地震儀 廣角地震 成像處理 縱橫波波速比

【摘要】：海底地震儀(OBS)探測在國內(nèi)進(jìn)入了快速、自主發(fā)展的階段,并得到廣泛應(yīng)用。目前國內(nèi)OBS探測以國產(chǎn)儀器及國內(nèi)科研隊伍為主,主要用于海底地殼結(jié)構(gòu)研究及海洋地震監(jiān)測。介紹了國內(nèi)OBS廣角地震數(shù)據(jù)處理及速度成像的主要方法,并綜合分析了前人提供的不同巖性縱橫波速比特征。(1)OBS數(shù)據(jù)處理包括解編、裁截、時間和位置校正、水平分量旋轉(zhuǎn)(橫波處理特有)及其他增強信噪比、提高分辨率的過程。(2)利用rayinvr擬合來自不同界面的反射及折射縱橫波,完成已識別震相的確認(rèn),得到合理的速度結(jié)構(gòu)。(3)縱橫波速比與巖性、孔隙填充物及孔隙度等壓實因素息息相關(guān)。不同巖性的巖石Vp/Vs與波速的關(guān)系分布在不同的區(qū)間內(nèi),未壓實的沉積層普遍具有較高的波速比,含有流體的巖石比含有氣體的巖石泊松比要高。
[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.

【作者單位】： 中國地質(zhì)大學(xué)(武漢)地球物理與空間信息學(xué)院;
【分類號】：P716.83
【正文快照】： 海底地震儀(Ocean Bottom Seismograph,簡稱OBS)是一種將地震檢波器直接放置在海底的流動地震觀測臺陣。它的主要組成部分包括地震計、水聽器、采集記錄單元、釋放單元及輔助設(shè)備等[1]。目前天然地震探測主要使用長周期OBS,短周期OBS主要應(yīng)用于海洋人工地震勘探。其結(jié)果可以用，

本文編號：1355868