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  • 重庆时时分析手机软件:Demultiple

    后一万能码 2期内中 www.qgqx.net Multiples are echoes or reverberations of primary reflections. They are usually unwanted and hence removed from the seismic to allow for optimal processing, imaging and interpretation results. Their presence can mask or interfere with underlying primary reflections which can often be weaker in amplitude.

    There are many different methods for multiple attenuation. Some target a specific class of multiple, often related to the water-layer in marine seismic. Others work on the basis of separating primary from multiple via transforms. Many form a model of the multiples which is then adaptively subtracted from the input. A variety of approaches are usually cascaded through an entire processing flow. Our experience and expertise allow us to maximize multiple attenuation whilst preserving primary energy. With so many methods and options available you can rely on our guidance, backed up by thorough testing, to obtain the best result for your particular project.

    Surface Related Multiple Elimination (SRME)

    Surface related multiple elimination uses the recorded data to predict multiples produced by the downward reflection at the sea-surface, without the need for any information on the subsurface. In addition to direct water bottom multiples and water layer peg legs, direct multiples from deeper horizons are also addressed.

    CGG’s true-azimuth 3D SRME provides highly effective multiple attenuation for any acquisition geometry. Our complementary data-driven and wave-equation modelling techniques respect the true offset and azimuth of the traces and can be applied directly to wide-azimuth data. The additional cross-line offsets which wide-azimuth data provide, allow the generation of a more accurate multiple model, which results in more effective multiple attenuation and better preservation of primaries.

    Internal Multiple Attenuation

    Internal multiple attenuation is based on an extension of the ideas of SRME. Surface related multiple attenuation recognizes that surface multiples can be broken down into combinations of various primary events and that therefore they can be modelled by convolution of the pre-stack input data. In a similar fashion, internal multiples can be broken down into combinations of primary reflections, but with a missing primary leg.

    The prediction of internal multiples that cross a nominal interface requires the convolution of data below the interface, plus a correlation of the data above the interface to remove the missing primary leg. This requires that all surface multiples have first been attenuated, along with any internal multiples generated above the interface. Input to the module is data that has already been processed to remove all source and receiver side surface multiples, plus an interface that separates the multiple generating events. CGG can offer several different techniques for Internal Multiple Attenuation.

     

    Challenges and strategies of interbed multipl...

    Min Wang | Barry Hung | Xiang Li | Stephane Fintz
    ?2016 EAGE

    Primary-preserving multiple attenuation for b...

    Ronan Sablon | Jean-Michel Deprey | Celine Lacombe
    ?2016 SEG

    Joint SRME and model-based water-layer demult...

    Hui Huang | Ping Wang | Jing Yang | Hui Chen | Pierre-Olivie...
    ?2016 SEG
    Subsurface Imaging - MWD

    MWD

    Get clearer images, more accurate velocity models and improved fault delineation. Remove unwanted multiples. Preserve data integrity.
    Subsurface Imaging - Land SRME

    Land SRME

    Remove multiples from seismic data. Preserve primary energy. Now available for land data. Clearer images. Better reservoir attributes.
    GeoSoftware - Geovation

    Geovation

    Efficient, reliable and high-quality seismic imaging and processing software for the largest and most challenging datasets.
    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
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