Volume 40 Number 3
  • ISSN: 0263-5046
  • E-ISSN: 1365-2397



Gravimetry and subsidence surveys are regularly conducted to monitor the gas-producing Snøhvit field. This technology provides insight into reservoir dynamics with lower costs and shorter turn-around time than widespread 4D seismic data. Through two decades, improvements in survey procedures and instrumentation have led to significantly better sensitivity to both gravity changes and subsidence. This has resulted in improved sensitivity to mass changes and compaction throughout the reservoir. In this article, we analyse the evolution of the noise level in the three surveys at Snøhvit in 2007, 2011 and 2019. We present in detail the results for the 2011–2019 time-lapse, and we describe how these measurements are incorporated into the history-matching routines and used to reduce the uncertainty in key reservoir parameters.


Article metrics loading...

Loading full text...

Full text loading...


  1. Agersborg, R. et al
    [2017]. Density Changes and Reservoir Compaction from In-situ Calibrated 4D Gravity and Subsidence Measured at the Seafloor:SPE Annual Technical Conference and Exhibition, Extended abstracts, PSE-187224-MS.
    [Google Scholar]
  2. Alnes, H. et al.
    [2010]. Experiences on Seafloor Gravimetric and Subsidence Monitoring Above Producing Reservoirs:72nd Conference and Exhibition, EAGE, Extended Abstracts, L010.
    [Google Scholar]
  3. Baig, I. et al.
    [2016]. Cenozoic exhumation on the southwestern Barents Shelf: Estimates and uncertainties constrained from compaction and thermal maturity analyses, Marine and Petroleum Geology, 73, 105–130.
    [Google Scholar]
  4. Hansen, O. et al.
    [2013]. Snøhvit: The History of Injecting and Storing 1 Mt CO2 in the Fluvial Tubåen Fm:Energy Procedia, 37, 3565–3573.
    [Google Scholar]
  5. Vatshelle, M. et al.
    [2017]. Monitoring the Ormen Lange field with 4D gravity and seafloor subsidence:79th EAGE Conference & Exhibition, Extended Abstracts, Th A1 06.
    [Google Scholar]
  6. VevatneJ. et al.
    [2012]. Use of field-wide seafloor time-lapse gravity in history matching the Mikkel gas condensate field:74th EAGE Conference & Exhibition, Extended Abstracts, F040.
    [Google Scholar]
  7. Zumberge, M. et al.
    [2008]. Precision of seafloor gravity and pressure measurements for reservoir monitoring:Geophysics, 73(6), WA133–WA141.
    [Google Scholar]

Data & Media loading...

  • Article Type: Research Article
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