The Sleipner CO2 storage site: using a basin model to understand reservoir simulations of plume dynamics

Stuart Haszeldine, Andrew J Cavanagh (Lead Author), Bamshad Nazarian

Research output: Contribution to journalArticlepeer-review

Abstract

The modelling challenge of simulating the layered CO2 plume at Sleipner site. Presenting insights into plume dynamics from applying both basin modelling and reservoir simulation approaches to matching the observed distribution of CO2. Using a Darcy flow model, the first decade of reservoir simulations for Sleipner has been characterized by poor matches to the known plume distribution, and forecasted plume dynamics that persisted for decades-to-centuries beyond the injection period. To overcome this problem of poor simulated replication, and to test the veracity of long term plume dynamics, we applied a basin model to Sleipner, which simulated the gravity-domi- nated migration of a buoyant fluid using a capillary percola- tion method. The basin model achieved an accurate match to the observed CO2 plume distribution. This implies that the plume is in a state of dynamic equilibrium and is likely to stabilize within years of the injection ending. Two challenges remain for the benchmark reservoir simulations: (A) how to represent the trapping and breaching behaviour of thin shale barriers for percolating CO2 within a storage formation; and (B) how to address pressure field arti- facts in larger regional Darcy flow models of CO2 storage.
Original languageEnglish
Pages (from-to)61 - 68
Number of pages8
JournalFirst Break
Volume33
Issue numberJune 2015
Early online date1 Jun 2015
Publication statusPublished - 2015

Keywords

  • Carbon dioxide capture and storage
  • Utsira
  • modelling
  • capillary flow
  • Darcy flow
  • calibration
  • pressure
  • trapping
  • glaciation
  • de-glaciation
  • Fracture and flow
  • percolation
  • equilibration

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