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  • 时时彩平投1:1盈利技巧:Q Tomography

    后一万能码 2期内中 www.qgqx.net Spatial variations in the absorption properties of the overburden cause frequency-dependent dissipation effects. This results in seismic amplitude attenuation and wavelet phase distortion which masks underlying events and decreases resolution.

    CGG's proprietary Q tomography and Q PSDM help address these issues. Q tomography builds a model of the anomaly using pre-stack amplitudes. Q PSDM can then use this model to compensate, recovering bandwidth, allowing meaningful AVO studies to be performed and aiding in the accurate prediction of reservoir properties.

    Frequency Shift Q Tomography (FS-QTOMO) is a refinement of the method. It's a purely data driven method using centroid frequency shift information from surface seismic data for back-propagation along ray paths to reconstruct the attenuation distribution in terms of Q (Quality Factor) values.

    Features

    • Implemented for Kirchhoff, Beam and RTM algorithms
    • Compensates for frequency-dependent loss during propagation, giving correct
      • phase
      • amplitude
      • resolution
    • Uses the estimated absorption model from frequency-dependent Q tomography to compensate for Q effects relative to the background
    • Goes beyond simplistic surface-consistent assumptions to compensate for transmission effects anywhere in the overburden.

    Benefits

    • Enables meaningful AVO analysis under complex overburdens, for example:
      • gas pockets or gas hydrates
      • unconformities
    • More accurate prediction of reservoir properties
    • Easier identification and interpretation of deeper reflectors

     

    Without Q PSDM With Q PSDM

    Slide to compare

    These sections from our Barreirinhas Basin multi-client survey, offshore Brazil, compare conventional PSDM overlain by our tomographic Q model (left) with results obtained with Q PSDM using that Q model (right).

    Automatic Gas Pockets Detection by High-resol...

    Fatiha Gamar | Patrice Guillaume | Antonio Pica | Geoffroy P...
    ?2015 EAGE

    Image quality enhancement using volumetric Q-...

    Fatiha Gamar | Loic Janot | Diego Carotti | Jenny Morante Go...
    ??2016 EAGE

    Imaging through mega gas clouds in offshore B...

    Nina Lin | Xiaodong Wu | Yi Xie | Joe Zhou | Suni Sulaiman |...
    ??2016 EAGE
    Subsurface Imaging - Least-Squares Migration

    Least-Squares Migration

    Least-Squares Migration provides images with better balanced illumination, improved signal-to-noise ratio, reduced migration artifacts and more interpretable seismic amplitudes.

    Subsurface Imaging - FWI

    Full Waveform Inversion

    Reveal intricate velocity details for the clearest images. Harness seismic low frequencies from BroadSeis, StagSeis, seabed and land data.

    Multi-Client Data - Brazil Barreirinhas Basin

    Brazil - Barreirinhas Basin

    The Megabar survey in the Equatorial Margins of Brazil provides over 14,000km2 of BroadSeis data with advanced pre-stack depth migration
    EAGE YouTube - Q-Tomo

    EAGE YouTube Channel

    E-Lecture
    Automatic Gas Pockets Detection by High Resolution Volumetric Q-Tomography...
    by Fatiha Gamar
    © 2017 EAGE Education B.V.
    Subsurface Imaging

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  • 太坏了!傅欢遇“断子绝孙腿” 这动作红牌都不冤 2019-04-17
  • 市民工地发现并机智"抢回" 4件圆明园流散文物终"回家" 2019-04-17
  • 世界杯成中国企业营销升级大战场 2019-04-15
  • 中东部地区将有强降雨 京津冀等地有轻至中度霾 2019-04-11
  • 郑永年:新时代的清醒判断 2019-04-11
  • 让协商民主优势得以充分发挥 2019-04-10
  • 网友给太原市市长留言获回复 共计11条 2019-04-09
  • 尧都区车站街建设社区老党员高德宏同志手抄“党章”庆党生 2019-04-09
  • 正心正念 爱国爱教 佛界楷模 2019-04-02
  • 防治土地荒漠化 新疆保护生态兼顾农民增收 2019-04-02
  • 许倬云作序《现代的历程》:现代人的天问 2019-03-31
  • 证监会:首发审核政策始终没有变化 2019-03-31
  • 2008年全球金融危机之后,为什么金融危机发源地的美国,欧债危机重灾区的欧洲各国股市连续7年走牛,屡创历史新高,唯经济最好的中国股市却连续7年熊冠全球?去年中国 2018-11-17
  • 完成自己的第一部电影, 她23岁就做到了 2018-11-17