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  • 重庆时时彩计划_人工版:CleanSweep

    A game-changer for onshore broadband seismic

    后一万能码 2期内中 www.qgqx.net CGG's CleanSweep is a new technology which unlocks the full potential of broadband land seismic by delivering a sweep featuring high-fidelity low frequencies free of harmonic noise and exceptionally high signal-to-noise ratio over the whole bandwidth. CleanSweep enables you to leverage the broad frequency content of your data for more reliable inversion and interpretation.

    Getting the most out of your broadband sweep?

    The advent of a new generation of sweeps tailored to extend the bandwidth at both low and high frequencies opened the door to onshore broadband acquisition. However, the full potential of these broadband sweeps has remained until now, obscured by the undesired harmonic distortion that was inevitably contaminating the whole bandwidth. To mitigate the effect of this broadband harmonic noise, the industry has developed specific acquisition strategies and post-acquisition processing techniques, but without addressing the challenges during sweep generation.

    Innovative harmonic noise reduction during sweep generation

    CleanSweep provides a signal free of harmonic noise over the first four octaves of frequency during sweep generation. It therefore avoids subsequent broadband harmonic noise contamination. CleanSweep is a noise cancellation solution which consists in adding an anti-distortion signal extracted from field measurements to a standard pilot sweep. This is specifically designed to result in a ground force that is free of harmonics and accurately fits the desired pilot.

    Time-frequency spectrum without CleanSweep

    Average time-frequency amplitude spectra of the ground force for a low-dwell broadband sweep, without and with CleanSweep. With CleanSweep the harmonic noise is totally removed over the first four low-frequency octaves and is significantly removed over the remaining bandwidth.

    Time-frequency spectrum with CleanSweep

    Four low-frequency octaves totally free of distortion

    CleanSweep is effective on all sweep designs particularly CGG's EmphaSeis low-dwell sweep, delivering four low-frequency octaves free of distortion. This removes the requirement for the use of post-processing techniques to eliminate the high distortion energy commonly recorded at low frequencies and therefore reduces the risk of impairing the signal.

    Shots without CleanSweep Shots with CleanSweep

    Slide to compare

     

    Best signal-to-noise ratio over the full bandwidth

    Because of the broadband nature of harmonic noise it will contaminate the entire bandwidth if not handled properly. By canceling the distortion during sweep generation, CleanSweep provides a signal-to-noise ratio uplift over the full bandwidth.

    Benefits for both flip-flop and slip-sweep acquisitions

    In flip-flop mode, CleanSweep avoids self-harmonic contamination such as ground roll harmonic interference with early arrivals. In slip-sweep mode, CleanSweep further improves the signal-to-noise ratio by reducing significantly the harmonic contamination from the next shots.

    Onshore - EmphaSeis

    EmphaSeis

    Optimize vibroseis source performance. Get better penetration and sharper images. Improve bandwidth for single or multicomponent analysis.
    Onshore - UltraSeis

    UltraSeis

    Enabling quantitative interpretation with high-quality, high-density and cost-effective seismic. A fully integrated solution for onshore reservoir development.

    Onshore - General Geophysics

    General Geophysics

    Mastering the full spectrum of geophysical techniques to design customized geophysical surveys for a wide range of industries.

    Onshore (Land)

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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