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Sleipner West Carbon Capture Storage plume movement

Energy transition

Sleipner West Carbon Capture Storage 4D seismic monitoring

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The objective of this carbon capture storage (CCS) repeat seismic survey is to regularly monitor the distribution of Carbon Dioxide (CO2), which had been injected into the 800 - 1100 m deep Utsira Formation sandstone since 1996.

Up until now, about 18 million tons of CO2 has been injected into the formation, and through time-lapse seismic studies the migration of the CO2 is being studied. 

Sleipner is the world's first offshore CCS plant.

In operation since 1996, it stores approximately 1 million tonnes of CO2 per year.

Client
Equinor

Location
Norwegian North Sea, Block 15/9, 160 miles west of Stavanger

 

Services delivered

  • Offshore in-field feather predictions
  • Optimise line selection
  • SIMOPS and perform repeatability analysis to determine the quality of the survey

Why monitor Carbon Dioxide levels?

Previous repeat surveys (in total 9 monitor surveys since 1999) showed a large response from the injected CO2. Therefore, it has been possible to map the distribution of undissolved CO2 in detail.

The purpose of the current survey is to monitor the expansion of the plume, and to confirm that the CO2 has stayed within the formation and not penetrated the overburden.  

Sleipner West Carbon Capture Storage 4D Seismic monitoring
Map of 2D/4D seismic lines with of positioning repeatability: green is good = low errors
CO2 storage monitoring: leakage detection and measurement in subsurface volumes from 3D seismic data at Sleipner.
Image courtesy of Equinor ASA

Leakage detection and measurement in subsurface volumes from 3D seismic data at Sleipner.