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  • 重庆时时彩有可能赢吗: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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  • 宝贝是地名,你能想到这么浪漫的地名在哪儿吗? 2019-11-03
  • 岳云鹏跟陈赫学打嗝 网友调侃:你教他说相声啊 2019-11-03
  • 高息债台倒塌致败局 资本猎手颜静刚丢了宏达矿业 2019-11-02
  • 成都寻旧文章中国国家地理网 2019-11-02
  • 第九届全球健康促进大会 2019-11-02
  • 孟铎合同到期即将离队 离加盟广东宏远只差官宣 2019-10-31
  • 香港推进“青年宿舍计划”(观香港) 2019-10-25
  • 马克思主义哲学是帮助我们看清世界的一双“慧眼” 2019-10-24
  • 望远镜的眼睛有多大?这个参数很关键 2019-10-24
  • 重磅!6月20日起 湖南启动省级环保督察 2019-10-19
  • 西安一男子伙同他人制假 将工业醋酸变身食用醋 2019-10-19
  • 合肥庐阳18小区将现“十八变” 4254户居民将受益 2019-10-16
  • 俄罗斯世界杯F组:球迷风采 2019-10-12
  • 赵艳青的专栏作者中国国家地理网 2019-10-05
  • 本赛季首次梅开二度 C罗“金球定律”如约而至 2019-10-03
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