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Definition of geohazards in exploration 3-D seismic data using attributes and neural-network analysis

机译：使用属性和神经网络分析定义勘探3-D地震数据中的地质灾害

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摘要

During a geohazards evaluation of an area in deep-water Green Canyon, using standard exploration three-dimensional (3-D) seismic data, different features of significance to drilling operations and the planning of seabed installations were observed. These features were indications of seabed slope instability, shallow gas accumulations in a channel deposit, gas chimneys, faults, and a seabed mound above a gas chimney. Edge-detection maps were used to highlight slope-failure scars, faults, the channel, and the seabed mound. Average absolute-amplitude maps were used to highlight slope-failure scars, faults, and possible shallow gas accumulations. Possible gas chimneys were mapped to identify fluid-migration pathways. The mapping of chimneys was done by the use of a recently developed method for detection of gas chimneys in 3-D seismic data. The method was developed to facilitate and increase the consistency in the mapping, as well as make gas chimneys visible in the map view. The results of the geohazards assessment were identification of a seabed slope-failure risk and a risk of overpressured gas in channel deposits.
机译：在深水格林 峡谷地区的地质灾害评估中，使用标准勘探三维（3-D）地震 数据，对钻井作业具有不同意义的特征< sup> 并观察了海底设施的规划。这些 特征表明海床边坡不稳定，通道沉积物中浅 气藏，气烟囱，断层， 以及天然气上方的海床丘烟囱。边缘检测图 用于突出斜坡破坏的疤痕，断层，河道， 和海床丘。使用平均绝对振幅图 突出显示斜坡破坏的疤痕，断层和可能的浅层 气藏。绘制可能的烟囱以标识 流体迁移途径。烟囱的制图通过 的使用最新开发的方法来检测3-D地震数据中的天然气 烟囱。开发该方法的目的是为了方便 并增加映射的一致性，并在地图视图中显示make 烟囱。地质灾害 评估的结果是确定了海床边坡破坏风险 和通道沉积物中气体超压的风险。

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  • 来源
    《AAPG Bulletin》 |2004年第6期|00000857-00000868|共12页
  • 作者

    Roar Heggland;

  • 作者单位

    Statoil ASA, N-4035 Stavanger, Norwayrohe@statoil.com;

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