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  • 时时彩为什么赢不了:Subsalt Imaging

    后一万能码 2期内中 www.qgqx.net Truly broadband data bring high resolution and layer differentiation. The reduced sidelobes create sharper wavelets for greater clarity. The six octaves of data recorded by BroadSeisTM provide high resolution shallow data as well as low frequencies for subsalt penetration. In order to achieve sufficient bandwidth in areas where high frequencies are limited, it is necessary to extend the low frequencies. Lower frequencies are affected less by attenuation, and provide greater accuracy and stability for seismic inversion.

    Brazil - Santos Basin

    Toggle to compare: Conventional Conventional with GWE BroadSeis

    In this example from the fast track PSDM processing from CGG's Santos Basin multi-client data, the broad bandwidth from BroadSeis provides improved pre-salt imaging over conventional surveys, even with GWE deghosting.

    Conventional marine streamer acquisition lacks sufficient signal-to-noise ratio in the 2-7 Hz bandwidth due to streamer depth, streamer tow noise, source array configuration, source depth and source bubble. Using BroadSeis we routinely record frequencies down to 2.5 Hz, providing three octaves of data below 20 Hz.

    Good signal-to-noise ratio data at low frequency need to be recorded, Deghosting techniques that only boost the low frequencies will not provide the same strength of signal as truly broadband data that have been recorded. Due to the proprietary curved shape of BroadSeis streamers, the average tow depth is significantly deeper than that of other acquisition geometries, which increases the signal-to-noise both by being below the swell and due to the steeper slope of the receiver ghost notch. In addition, Sentinel solid streamers are renowned for their low-noise properties, especially at low frequencies, and have been shown to be 10-15 dB quieter at 5 Hz than gel streamers in vibration tank tests.

    Gulf of Mexico

    GoM salt flood 20 Hz Salt Flood RTM showing improved illumination of the subsalt.

    Angola BroadSeis

    Offshore West Africa - Angola

    We see the same improvements in data quality on the Eastern side of the Atlantic. In this example from our multi-client data in Block 21 there is clear imaging of the base salt and pre-salt structures as well as fine definition of the post-salt.

    In addition to extending the low frequencies subsalt imaging is often enhanced by acquiring long offsets and increasing the range of azimuths. The improved sampling enhances illumination as well as improving noise and multiple attenuation.

    Improve Pre-Salt Imaging with Variable-Depth ...

    Thomas Rebert | Ronan Sablon | Nicolas Vidal | Pierre Charri...
    ?2012 SEG

    Broadband, long-offset, full-azimuth, stagger...

    Fabrice Mandroux | Beng Ong | Chu-Ong Ting | Sabaresan Mothi...
    ?2013 EAGE

    Staggered marine acquisition design for compl...

    Fabrice Mandroux | Chu-ong Ting | Bob Montgomery | Alexandre...
    ?2013 SEG
    Offshore - StagSeis

    StagSeis

    Illuminate subsalt and basalt like never before. Reduce exploration and production risk. Ultra long-offset, full-azimuth broadband for unparalleled interpretation.
    Offshore - Low Frequency Recording

    Ultra-Low Frequency Recording

    See below salt and basalt. Build better reservoir models. Record useful data down to 2.5 Hz with Sentinel.
    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.
    Offshore - BroadSeis

    BroadSeis

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

    Offshore - BroadSeis Interp

    BroadSeis Interpretation

    Confident interpretation from clear differentiation between sedimentary packages and better facies discrimination with the ultra-low frequencies delivered by BroadSeis.
    Multi-Client Data - Brazil Presalt

    Brazil Pre-Salt

    Extensive modern BroadSeis pre-salt library offshore Brazil, including Santos and Campos Basins. Assess your options. Make informed decisions.
    Offshore (Marine)

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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