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    1. Geosciences

    CGG supporting latest phase of Northern Lights seismic impacts study

    Oct. 25, 2023
    CGG has joined Phase 3 of the HNET Horda Platform Region project to monitor background seismicity at the Northern Lights CO2 storage project in the Norwegian North Sea.
    Related To: CGG
    Courtesy CGG
    Holnsøy seascape in June 2023: HNET consortium members gather around a geophone station that is part of the HNAR onshore array monitoring the subsurface microseismic activity in the future CO2 storage area.
    Holnsøy seascape in June 2023: HNET consortium members gather around a geophone station that is part of the HNAR onshore array monitoring the subsurface microseismic activity in the future CO2 storage area.

    Offshore staff

    MASSY, France — CGG has joined Phase 3 of the HNET Horda Platform Region project to monitor background seismicity at the Northern Lights CO2 storage project in the Norwegian North Sea.

    The company has made available the 3D velocity model from its 44,000-sq-km Northern Viking Graben multiclient seismic dataset and is working with other partners using this model to improve the accuracy of seismic events detected, as part of a future monitoring system.

    Phases 1 and 2 of HNET investigated onshore and offshore seismic monitoring instrumentation solutions, deploying a new onshore array (HNAR) on Holsnøy island north of Bergen.

    The program included assessing the integration of offshore nodes that form part of existing permanent reservoir monitoring sensor arrays in the area.

    Phase 3, which will run until April 2024, is focused on determining natural seismicity in the planned CO2 offshore injection site. The operator aims to assess the nature of tectonic seismic activity prior to CO2 injection underground and more accurately analyze any induced seismicity during the injection period.

    In this case, the HNAR onshore monitoring array and a selection of offshore permanent reservoir monitoring nodes will be used to improve detection accuracy.

    HNET is a research and technology project aimed at developing and demonstrating a baseline seismic monitoring network for offshore CO2 storage in the Horda platform region of the North Sea.

    Goals include testing local seismic array processing for enhanced earthquake detection; improving understanding of seismic hazard potential in the area; supporting offshore CO2 storage projects in the region; working with stakeholders to find better ways of understanding earthquake hazards.

    10.25.2023

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