1887

Abstract

Summary

Time-lapse gravity and seafloor deformation surveys have become pivotal in monitoring offshore hydrocarbon-producing reservoirs, particularly in Norwegian gas fields like Troll, Ormen Lange, and many others. These surveys offer an alternative to 4D seismic methods or can be used to reduce the frequency of costly seismic acquisitions.

The technology is deployed from smaller vessels, and hence minimizes environmental impact and is suitable for areas with dense infrastructure like windmill farms. All these advantages make it a very good fit for CCS monitoring. This abstract introduces first the principles of the technology and then discusses field cases illustrating its value for CCS.

Feasibility studies on the Morecambe fields demonstrate the technology’s effectiveness in mapping CO2 movement and detecting even minute migrations out of storage sites. Notably, this is a case in which injection is planned on a depleted gas reservoir, which suffers from weak 4D seismic signals due to the C02 mixing with the residual gas in place. Modeling results show very strong time-lapse and seafloor deformation signals. As technology advances, with unmanned vessel deployment expected by 2025, time-lapse gravimetry and deformation surveys promise enhanced operational efficiency and accuracy, cementing their pivotal role in the mixture of technologies for CCS monitoring.

© EAGE Publications BV
Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.202477085
2024-11-20
2026-02-11

  • From This Site

    /content/papers/10.3997/2214-4609.202477085
    dcterms_title,dcterms_subject,pub_keyword
    -contentType:Journal -contentType:Contributor -contentType:Concept -contentType:Institution
    10
    5
Loading full text...

Full text loading...

References

  1. Borges, F. et al., (2024), Monitoring CO2 Storage in the Morecambe Depleted Gas Reservoirs through Seafloor Deformation and Time-Lapse Gravimetry Measurements. First Break, 42(3), 71–75.
     [Google Scholar]
  2. Dunnet al., (2016), A long-term seafloor deformation monitoring campaign at Ormen Lange gas field, First Break34 (10).
     [Google Scholar]
  3. Harrington, S. et al., (2023), Quantifying the Predicted Seismic and EM response of CO2 injection into a depleted gas reservoir. The fourth EAGE Global Energy Transition Conf. and Exhib., Nov 2023, 1–5.
     [Google Scholar]
  4. RinaldiA. P., RutqvistJ. (2013), Modeling of deep fracture zone opening and transient ground surface uplift at KB-502 CO2 injection well, In Salah, Algeria. International Journal of Greenhouse Gas Control 2013:12:155–67.
     [Google Scholar]
  5. Ringrose, P.S. et al., (2013). The In Sala CO2 storage project: lessons learned and knowledge transfer, Energy Procedia376226–6236.
     [Google Scholar]
  6. Ruiz, H. et al., (2022). Monitoring the Snøhvit gas field using seabed gravimetry and subsidence. First Break, 40(3), 93–96.
     [Google Scholar]
  7. Rutqvist, J. (2012), The GeoMechanics of CO2 Storage in Deep Sedimentary Formations, Geotech. Geol.Eng. 30:525–551.
     [Google Scholar]
  8. Rutqvist, J. et al., (2016), Fault activation and induced seismicity in geological carbon storage -Lessons learned from recent modeling studies, Journal of Rock Mechanics and Geotechnical Engineering8 (2016) 789–804.
     [Google Scholar]
  9. Solbu, Ø.Et al. (2023). Time-Lapse Gravity and Subsidence Applied in History Matching of a Gas-Condensate Field. First Break, 41(9), 69–74.
     [Google Scholar]
/content/papers/10.3997/2214-4609.202477085
Loading
Time-lapse Gravity and Deformation Monitoring as a Cost-Efficient Alternative to 4D Seismic for CCS
Conference Proceedings 2024, 1 (2024); https://doi.org/10.3997/2214-4609.202477085
/content/papers/10.3997/2214-4609.202477085
/content/papers/10.3997/2214-4609.202477085
Loading

Data & Media loading...

Most Cited This Month Most Cited RSS feed

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error