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  • 500元 倍投方案 稳赚:Enhanced Interpretation

    Broad Bandwidths

    后一万能码 2期内中 www.qgqx.net The broad bandwidths provided by BroadSeis? enhance interpretation since the higher frequencies provide more detail about the geology, such as thin stratigraphic features and subtle rock structures, and the low frequencies contribute to better imaging of deep targets and large scale facies variations as well as providing better stability for pre- and post-stack seismic inversions.

    Layer Differentiation

    The low frequencies give an envelope to the seismic signal that shapes the larger scale impedance variations or, in geological terms, the major lithology variations. This increases confidence in correlating seismic interpretation across faults and other major structural features and allows layers to be easily differentiated. The phase control of the low-frequencies is very good, so BroadSeis data have a characteristic 'texture' which brings a new appearance to seismic stratigraphy.


    WA Conventional WAus BroadSeis

    Slide to compare

    In this example from northwest Australia the broader bandwidths provided by BroadSeis give better lateral resolution and clear layer definition


    The increased resolution provided by wavelets without side lobes produces events that are single peaks or troughs, corresponding to genuine geological layers. This clarifies impedance contrasts and creates sharp images of small features, as well as providing clear differentiation between different sedimentary packages. Examples from northwest Australia show unprecedented clarity of deeper targets, with resolution our clients tell us they have never before seen in this area.

    Faster Auto-Picking

    The broader bandwidth provides greater correlation between traces for faster and more reliable interpretation by auto-tracking tools. In the North Sea example below tests demonstrated that it is five times faster to interpret the top chalk horizon on BroadSeis data than on conventional data.

    Enhanced Interpretation

    This example of BroadSeis from the North Sea demonstrates the additional value gained from the broader bandwidth. The sharp peak and lack of sidelobes enabled clear identification of thin layers and terminations in the Dornoch coals. Deeper in the stratigraphy, at the prospective Tertiary turbidite systems, there is a thick, low acoustic impedance shale sequence in the Paleocene Lista formation. The seismic correlates very well with well log data showing top and base of these soft shales. The strong-amplitude low frequencies bring in the true envelope signature of this formation revealing a major impedance contrast.

    NSea Dornoch SandsCentral North Sea example. BroadSeis data help to interpret as yet unseen details of the geology to identify new prospects and define existing plays better.

    Lithology Discrimination

    Away from the well calibration point, in the central part of the section, there is a prominent relief structure corresponding to a channel compactional feature with fill deposits having a different lithology, i.e. composed of less compactable sediments, including the desirable reservoir channel sands. The top of these sands appears very clearly on the BroadSeis data although it could hardly be identified on conventional data. Channel levee sands, overbank deposits and sand body pinch-outs are also easier to identify.

    Angola Kwanza basin - sub-salt plays of the u...

    Gregor Duval | Jaswinder Mann | Lauren Houston
    ?2013 GeoPublishing Ltd

    Exploring the Mid North Sea High

    Gregor Duval | Matthew Dack
    ?2014 GeoPublishing Ltd

    Santos Basin: Complex salt structures and pre...

    Jaswinder Mann | James W. D. Rigg
    ?2012 GeoPublishing Ltd
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    Make informed decisions for upcoming licensing rounds with our Espirito Santo BroadSeis data.
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    Flexibility is the key to a successful project. CGG offers a toolbox of broadband solutions to help you acquire the data you want.

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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