• 2018年度大学生就业蓝皮书发布 高职就业率首次超本科生 2019-06-13
  • 汇聚正能量 讴歌新时代——关于用微电影传播核心价值观的倡议书 2019-06-13
  • eHub发布“鲁班”智能营销云 重塑智能时代的商业变革 2019-06-08
  • 海外版望海楼:“五大观念”的时代价值 2019-06-08
  • 打假还是误伤?拼多多遭遇大量商家上门维权 2019-06-08
  • 柳斌杰:加强文化担当同样是企业不可缺少的社会责任 2019-06-08
  • 人民网评:异地医保的步子还需更大一些 2019-06-05
  • 【一周反腐】保监会原主席项俊波等两名省部级干部案有进展 2019-06-03
  • 吕梁:临县青塘“粽叶香”非遗艺术节开幕 乡土节目很吸睛 2019-06-03
  • 尽力打好每一场球(奥运大点兵·男篮)  2019-06-02
  • 高原净土·大美青海--旅游频道 2019-06-01
  • 做强茶企 告别“大而不强” 2019-05-27
  • 端午假期结束 中国接待国内游客8910万人次 2019-05-26
  • 一语惊坛(5月17日):深化“放管服”,把便民利企做实做好。 2019-05-23
  • 李克强主持召开国务院常务会议 2019-05-23
  • 河北时时彩11选五:Full Waveform Inversion

    后一万能码 2期内中 www.qgqx.net Full-Waveform Inversion (FWI) derives high-resolution velocity models by minimizing the difference between observed and modeled seismic waveforms. It goes beyond refraction and reflection tomography techniques, which use only the travel time kinematics of the seismic data, by using additional information provided by the amplitude and phase of the seismic waveform.

    The highly detailed models provided by FWI can be used to resolve complex geological features, as well as aid in identifying potential geohazards. These high-definition models can also be input directly to pore pressure prediction flows, time-lapse monitoring and reservoir characterization analysis. Subsurface images produced using these highly accurate models provide interpreters with a much higher degree of confidence with respect to reservoir delineation and subsequent well planning.

    Many areas across the world share a common issue – complex near-surface conditions such as shallow gas anomalies, sediment carapace, permafrost, volcanic intrusions and paleo-canyons. FWI is well suited to handling these challenges."

    Anisotropy & cycle skipping

    Our FWI algorithms honor anything from isotropy to orthorhombic anisotropy. In FWI, the problem of cycle-skipping occurs when the difference in arrival time between modeled and observed data is larger than a half-cycle of the dominant frequency. It can cause the algorithm to converge on a wrong local solution. We have developed technology and workflows to mitigate this issue, especially for data with a lack of low-frequency signal or with a less accurate starting model.

    Reflection-based FWI

    Our latest reflection-based FWI technology allows us to resolve complex geological challenges by utilizing both refraction and reflection data. The addition of reflection information improves the velocity model beyond diving-wave penetration depths, resulting in significantly better ultra-deep images. In areas such as the Gulf of Mexico, reflection-based FWI delivers improvements to salt model accuracy and subsalt imaging.

     

    This FWI example extracted from our 25,000 km2 BroadSeis? multi-client survey offshore Gabon shows the level of detail provided for interpreters.

    Orthorhombic full-waveform inversion for imag...

    Yi Xie | Bin Zhou | Joe Zhou | Jiangtao Hu | Lei Xu ...
    ?2017 SEG

    Extracting geological information directly fr...

    Nick Benfield | Vishram Rambaran | Joel Dowlath | Tom Sincla...
    ?2017 SEG

    An offshore Gabon full-waveform inversion cas...

    Bingmu Xiao | Nadezhda Kotova | Samuel Bretherton | Andrew R...
    ?2016 SEG
    Offshore - BroadSeis

    BroadSeis

    Broadest bandwidth, best low frequencies deliver accurate models for better decisions. Choose BroadSeis at all stages from exploration to production.

    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.

    Multi-Client Data - Gabon

    Gabon

    Over 25,000km2 PSDM seismic data available as part of a complete geoscience package including regional geological analysis in this prospective area.
    Subsurface Imaging

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  • 2018年度大学生就业蓝皮书发布 高职就业率首次超本科生 2019-06-13
  • 汇聚正能量 讴歌新时代——关于用微电影传播核心价值观的倡议书 2019-06-13
  • eHub发布“鲁班”智能营销云 重塑智能时代的商业变革 2019-06-08
  • 海外版望海楼:“五大观念”的时代价值 2019-06-08
  • 打假还是误伤?拼多多遭遇大量商家上门维权 2019-06-08
  • 柳斌杰:加强文化担当同样是企业不可缺少的社会责任 2019-06-08
  • 人民网评:异地医保的步子还需更大一些 2019-06-05
  • 【一周反腐】保监会原主席项俊波等两名省部级干部案有进展 2019-06-03
  • 吕梁:临县青塘“粽叶香”非遗艺术节开幕 乡土节目很吸睛 2019-06-03
  • 尽力打好每一场球(奥运大点兵·男篮)  2019-06-02
  • 高原净土·大美青海--旅游频道 2019-06-01
  • 做强茶企 告别“大而不强” 2019-05-27
  • 端午假期结束 中国接待国内游客8910万人次 2019-05-26
  • 一语惊坛(5月17日):深化“放管服”,把便民利企做实做好。 2019-05-23
  • 李克强主持召开国务院常务会议 2019-05-23