• 冯翠玲:把党的声音传递给“国际大家庭” 2019-06-24
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  • 河北体彩十一选5推荐号:4D Processing

    后一万能码 2期内中 www.qgqx.net Processing and imaging time-lapse datasets requires great care and attention to detail which is why our experience really makes a difference. The aim of 4D processing is to attenuate the 4D noise caused by changes in acquisition parameters or environmental conditions, and to emphasise the 4D signature of the reservoir caused by changes in fluid, pressure and stress.

    A key philosophy in 4D processing is to optimize for the 4D difference. For example with 4D demultiple, if you optimize for best multiple attenuation on each individual dataset you usually end up with a worse 4D result. We use 4D cost functions to allow a trade-off between what is best for processing and what gives the best 4D difference.

    Statics

    Static differences between vintages occur in both land and marine 4D surveys. They are caused by changes in the near-surface, weathering layer, water column or water surface conditions. Our range of strategies and algorithms include application of deterministic GPS-based tidal and waveheight corrections and statistical 4D corrections.

    Regularization

    The regularization of 4D datasets uses bin centring and interpolation of missing data to create either regularly sampled datasets on a common grid, or to map monitor survey data onto a base survey grid. Our REVIVE technique uses up to 5 dimensions to dramatically increase the interpolation accuracy.

    4D binning

    4D Binning

    4D binning is an essential step in time-lapse processing which selects the most compatible data for 4D processing. Traces are selected from all of the vintages making up the 4D dataset which are best matched in terms of source, receiver and midpoint position, offset and azimuth. The binning criteria can be extended to include statistical measurements of 4D data quality such as cross-correlation, predictability and NRMS.

    De-striping

    Systematic amplitude variations related to the acquisition geometry create a pattern or acquisition footprint. The footprint within each vintage is emphasized in the 4D difference. We use a 4D de-striping technique where data from all vintages are analyzed for systematic variations with respect to acquisition attributes, such as sail line, and scalars are calculated to compensate for them.

    Matching

    Matching is used to minimize residual 4D differences caused by acquisition and environmental variations which cannot be addressed by deterministic corrections. We have a range of sophisticated multi-vintage matching techniques to suit a wide range of 4D datasets, including the merging and 4D matching of streamer and OBC datasets.

     

    A regularization algorithm optimized for time...

    Adel Khalil | Henning Hoeber | Bernard Deschizeaux | Mark Ib...
    ??2016 EAGE

    Time-lapse full-waveform inversion as a reser...

    Erik Hicks | Henning Hoeber | Marianne Houbiers | Séverine P...
    ?2016 SEG

    Application of image consistent time-strain a...

    H. Hoeber | A. Khalil | S. De Pierrepont | Z. Dobo | H. Neal...
    ??2016 EAGE
    Offshore - 4D Solutions

    4D Solutions

    Our 4D toolbox ensures seismic repeatability via powerful integrated vessel, source and streamer steering with source signature monitoring .
    Subsurface Imaging - MWD

    MWD

    Get clearer images, more accurate velocity models and improved fault delineation. Remove unwanted multiples. Preserve data integrity.
    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

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  • 冯翠玲:把党的声音传递给“国际大家庭” 2019-06-24
  • 经济日报多媒体数字报刊 2019-06-24
  • 红木家具日常养护之法 2019-06-24
  • 今年东盟投资峰会亮点纷呈 八场活动宣传广西旅游 2019-06-22
  • 90后听障女孩北漂学舞 王力宏为她写歌:我欣然接受我的不完美 2019-06-21
  • 习近平齐鲁之行的七个感人瞬间 2019-06-19
  • 中国雷达4.0时代相关新闻 2019-06-19
  • 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
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