Publication details.

Paper

Year:2020
Author(s):F. Parisio, V. Vilarrasa
Title:Sinking CO2 in Supercritical Reservoirs
Journal:GEOPHYSICAL RESEARCH LETTERS
ISSN:0094-8276
JCR Impact Factor:4.72
Volume:47
Issue No.:23
Pages:090456
D.O.I.:10.1029/2020GL090456
Web:https://dx.doi.org/10.1029/2020GL090456
Abstract:© 2020. The Authors.Geologic carbon storage is required for achieving negative CO2 emissions to deal with the climate crisis. The classical concept of CO2 storage consists in injecting CO2 in geological formations at depths greater than 800 m, where CO2 becomes a dense fluid, minimizing storage volume. Yet CO2 has a density lower than the resident brine and tends to float, challenging the widespread deployment of geologic carbon storage. Here, we propose for the first time to store CO2 in supercritical reservoirs to reduce the buoyancy-driven leakage risk. Supercritical reservoirs are found at drilling-reachable depth in volcanic areas, where high pressure (p > 21.8 MPa) and temperature (T > 374°C) imply CO2 is denser than water. We estimate that a CO2 storage capacity in the range of 50–500 Mt yr−1 could be achieved for every 100 injection wells. Carbon storage in supercritical reservoirs is an appealing alternative to the traditional approach.

Related staff

  • Victor Vilarrasa Riaño
  • Related departments

  • Oceanography and Global Change