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  • 时时彩出号绝密公式:BroadSeis

    后一万能码 2期内中 www.qgqx.net CGG's BroadSeis? solution delivers the most detailed high-resolution subsurface images with the best low frequencies from a combination of advanced equipment, proprietary variable-depth streamer profiles and deghosting and imaging technology.

    GoM BroadSeis v3 Comparison from the Gulf of Mexico. BroadSeis achieves an impressive 2.5 - 155Hz of signal - almost 6 octaves, providing exceptional resolution and penetration.

    As a consequence of the unique, streamer configuration, BroadSeis is able to deliver the deepest tow in the industry, up to 50m. Combining this with the exceptional low-noise characteristics of Sentinel solid streamers delivers the lowest frequencies with the best signal to noise ratio available.

    Benefits:

    BroadSeis delivers the clearest images and details at the reservoir from exceptionally sharp and clean wavelets without sidelobes, from over 6 octaves of bandwidth, to provide:

    BroadSeis How 3

    How it works

    Towed streamer data are affected by a receiver ghost, caused by the reflection of data back down from the sea surface. The up-going primary energy and the down-going ghost energy interfere, causing a notch in the amplitude spectrum where these are out of phase and a boost where they are in phase. The frequency of the ghost notch depends on the depth of the receivers.

    BroadSeis acquires both low and high frequencies by using a variable-depth towing configuration. With this configuration, the receiver ghost notch varies along the cable and this “notch diversity” is exploited by the proprietary deghosting technique. The variability of the streamer depth and shape of the cable can be tuned for different targets so that the notch diversity and output spectra are optimized for each survey.

    Thus conventional flat streamer data are "tuned" to a specific frequency range whereas BroadSeis variable-depth streamer data are "detuned", since the ghost notches are at different frequencies for different offsets within any common midpoint and therefore cancel on stacking.

    Deghosting

    CGG has developed an extensive toolbox of deghosting algorithms that can be applied to data prior to imaging. Our Ghost Wavefield Elimination (GWE) technique uses linear Radon equations which have been modified to include re-datum and re-ghost terms, resulting in a surface datum Tau-p model. This model enables separation of the upgoing and downgoing waves and is used for receiver deghosting and to re-datum data. The method assumes 2D wavefield propagation along the streamers and is suitable for most 2D and 3D data acquired using a narrow- or wide-azimuth streamer geometry.

    BS Deghosting v2 Common shot displays showing input , up-going and down-going components, with common channel displays before and after deghosting with associated amplitude spectra in dB (input in blue, deghosted in red)

    For broadband processing of full-azimuth data (such as those acquired by StagSeis?) or reflections that exhibit strong 3D effects, use of our full 3D deghosting technique is required. This uses a progressive sparse Tau-Px-Py inversion to perform 3D joint deghosting and crossline interpolation in one step, thereby overcoming the issue of coarse and irregular crossline sampling.

    BroadSeis is operationally robust and fully compatible with streamer steering, wide-azimuth geometries and 4D monitoring. When combined with BroadSource to eliminate the source ghost notch, the high frequencies are limited only by the sampling interval Nyquist and the absorption of the earth, without compromising the excellent low frequencies.

    Variable-depth streamer: deep towing and effi...

    Robert Soubaras

    Broadband Seismic Technology and Beyond Part ...

    Lasse Amundsen | Martin Landro
    ?2014 GeoPublishing Ltd

    Experiencing the full bandwidth of energy fro...

    Jo Firth | Idar Horstad | Menne Schakel
    ?2014 EAGE
    Offshore - BroadSource & BroadSeis

    BroadSource & BroadSeis

    Get the widest bandwidth and highest frequencies from ghost-free wavelets without compromising low frequencies. Available in flip-flop mode across the fleet.
    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.
    Offshore - TopSeis

    TopSeis

    A next-generation marine acquisition solution for acquiring zero and near offsets to improve the imaging of shallow and intermediate targets.
    Offshore - BroadSeis for Exploration

    BroadSeis for Exploration

    Clear images of prospects at all levels delivered by the broadest bandwidth with the best low frequencies.
    Offshore - BroadSeis for Development

    BroadSeis for Development

    Quantitative inversion, even without wells, for accurate models and better decisions delivered by the broadest bandwidth and best low frequencies.
    Offshore - BroadSeis AVO & Inversion

    BroadSeis AVO & Inversion

    The low frequencies achieved by BroadSeis deliver stable inversion results, even away from existing wells making lithology prediction more reliable
    Offshore (Marine)

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    Offshore - BroadSeis

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    BroadSeis combines industry-leading equipment, unique variable-depth streamer acquisition techniques and proprietary deghosting technology.
  • 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