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  • 河北省快3开奖结果3:Industry Articles

    Industry Articles Banner

    后一万能码 2期内中 www.qgqx.net The benefits of CGG technologies and services are regularly featured in the industry press. Find out more by consulting our e-library of published industry articles. Narrow your search by entering at least one search criterion:

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    Integration in Exploration

    Oilfield Technology, May, 2019
    Carl Watkins | Daniel Carruthers | Pedro Martinez Duran | Simon Otto | Mark Cowgill
    ?2019 Palladian Publications Ltd

    Integrated exploration, new workflows for new challenges highlighting JumpStart Gabon, Marine Source Predictions and Encontrado reprocessing projects.

     Download (PDF, 1.7MB)

    Consolidating rock-physics classics: A practical take on granular effective medium models

    The Leading Edge, May, 2019
    Fabien Allo
    ?2019 SEG

    The paper presents a review of classic rock physics models used for clastic sedimentary rocks and how they have been combined into extended models through the introduction of a few parameters associated with a compositional or textural property of the rock. The models are used on a variety of real data sets to showcase how rock properties can be inferred from elastic properties.

     Download (PDF, 506.9KB)

    3D fault imaging using windowed Radon transforms: an example from the North Sea

    First Break, May, 2019
    Geoffrey Dorn
    ?2019 EAGE

    The interpretation of fault surfaces is key to understanding the subsurface geology represented in 3D seismic volumes. The geologic structure represented by seismic reflections can be auto-tracked in the volume. Faults, however, are imaged as discontinuities or changes in curvature in the seismic data. For many years, fault interpretation involved manually picking fault cuts on orthogonal slices through the seismic volume. These fault cuts were grouped into conceptual faults, and 3D fault surfaces were created from the fault cuts.

     Download (PDF, 930.8KB)

    Full-waveform inversion for salt: A coming of age

    The Leading Edge, March, 2019
    Ping Wang | Zhigang Zhang | Jiawei Mei | Feng Lin | Rongxin Huang
    ?2019 SEG

    Full-waveform inversion (FWI), proposed by Lailly and Tarantola in the 1980s, is considered the most promising data-driven tool to automatically build velocity models. Many successful examples have been reported using FWI to update shallow sediments, gas pockets, and mud volcanoes. However, successful applications of FWI to update salt structures had almost only been seen on synthetic data until recent progress at the Atlantis field, Gulf of Mexico (GoM). We revisited some aspects of FWI algorithms to minimize cycle-skipping and amplitude discrepancy issues and derived an FWI algorithm that is able to build complex salt velocity models. We applied this algorithm to a variety of data sets including WAZ (wide-azimuth) and FAZ (full-azimuth) streamer data as well as OBN (ocean bottom node) data with different geologic settings in order to: 1) demonstrate the effectiveness of the method for salt velocity updates, and 2) examine some fundamentals of the salt problem. We observe that in multiple cases, salt velocity models from this FWI produce subsalt images of superior quality. We demonstrate with one FAZ streamer data example in Keathley Canyon that we probably do not need very high frequency in FWI for subsalt imaging purposes. Based on this observation, we envision that sparse node for velocity (NFV) acquisition may provide appropriate data to handle large and complex salt bodies with FWI. We believe that the combination of advanced FWI algorithms and appropriate data acquisition will bring a step-change to subsalt imaging.

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    Leveraging Legacy Data

    Oilfield Technology, March, 2019
    Jo Firth | Priyabrata Pradhan
    ?2019 Palladian Publications Ltd

    In recent years, there have been many rapid developments in subsurface imaging, meaning that even data sets that are only two or three years old can benefit from reprocessing. Reprocessing older data, either on its own or in combination with new data, is both practical and cost-effective as new acquisition can be expensive and time-consuming, especially in areas where there are seasonal constraints due to climate, fishing or breeding seasons. The Cornerstone Evolution project in the Central North Sea demonstrates the value achieved by reprocessing a large number of older surveys in conjunction with newer acquisition.

     Download (PDF, 1.4MB)

  • 端午假期结束 中国接待国内游客8910万人次 2019-05-26
  • 一语惊坛(5月17日):深化“放管服”,把便民利企做实做好。 2019-05-23
  • 李克强主持召开国务院常务会议 2019-05-23
  • 冯提莫被挪用公款会计打赏 律师无法强制退钱 2019-05-19
  • 杭州加强对党员干部涉黑涉恶问题监督执纪 2019-05-19
  • “煤老大”渐行渐远 新动能清风徐来 山西抓紧资源型经济转型 2019-05-12
  • 俄罗斯世界杯F组:球迷风采 2019-05-11
  • Lorgane législatif chinois décide de la composition du nouveau gouvernement 2019-05-07
  • 相思湖边包鱼粽 孝心满满全家欢 2019-05-01
  • 次贷危机十年 防范金融危机还需做什么? 2019-05-01
  • 国务院关税税则委员会关于对原产于美国500亿美元进口商品加征关税的公告 2019-04-29
  • 我在吃饭,好像人只能吃饭不能作别的了。看着就笑笑 2019-04-29
  • 珠海银隆IPO终止,格力造车梦终结? 2019-04-26
  • 湖州市残疾人联合会第七次代表大会开幕 2019-04-25
  • 中国资本市场开放出大招 跨境证券投资更便利 2019-04-25