Seismic Data Acquisition Using Ocean Bottom Seismic Nodes At the Deimos Field, Gulf of Mexico
Seismic Data Acquisition Using Ocean Bottom Seismic Nodes At the Deimos Field, Gulf of Mexico
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DOI：
10.1190/1.3063805
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
F. Smit;C. Perkins;Laura Lepre;K. Craft;Reagan N. Woodard
中科院分区：
文献类型：
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作者：
F. Smit;C. Perkins;Laura Lepre;K. Craft;Reagan N. Woodard
利用海底地震（OBS）节点对墨西哥湾Deimos油田进行了地震数据采集，水深约1000米。该油田位于盐垂下。采用波动方程模型确定节点的最佳位置。在很长的偏移量处获取数据的能力特别有用。事实证明，在有大量地面和海底基础设施、操作干扰和强洋流的地区，地震作业是灵活的。随着OBS节点技术市场的发展，未来将获得更多的调查，预计最佳操作实践将提高该领域的效率。数据的预处理包括节点定位、时间间隔对准、垂直检波器数据的优化波场分离和噪声衰减。下行波场数据成功地向目标深度偏移。迄今为止获得的处理结果表明，与现有的窄方位角数据相比，盐下成像有了显著改善。
Seismic data acquisition using Ocean Bottom Seismic (OBS) nodes was conducted over the Deimos field in the Gulf of Mexico, in about 1000m of water. The field is located under a salt overhang. Wave equation modeling was used to determine the optimal location of the nodes. The ability to acquire data at very long offsets was particularly useful. Seismic operations proved to be flexible in an area with considerable surface and subsea infrastructure, operational interference and strong currents. As the market for OBS node technology develops and more surveys get acquired in the future, it is expected that operational best practices will lead to increased efficiency in the field. Pre-processing of the data included node positioning, timebreak alignment, and optimized wavefield separation and noise attenuation on vertical geophone data. Migration of the downgoing wavefield data proved to be successful down to the target depth. Processed results achieved to date show significant improvements in sub-salt imaging compared to existing narrow azimuth data.