35 research outputs found
420,000 year assessment of fault leakage rates shows geological carbon storage is secure
Carbon capture and storage (CCS) technology is routinely cited as a cost effective tool for climate change mitigation. CCS can directly reduce industrial CO2 emissions and is essential for the retention of CO2 extracted from the atmosphere. To be effective as a climate change mitigation tool, CO2 must be securely retained for 10,000 years (10 ka) with a leakage rate of below 0.01% per year of the total amount of CO2 injected. Migration of CO2 back to the atmosphere via leakage through geological faults is a potential high impact risk to CO2 storage integrity. Here, we calculate for the first time natural leakage rates from a 420 ka paleo-record of CO2 leakage above a naturally occurring, faulted, CO2 reservoir in Arizona, USA. Surface travertine (CaCO3) deposits provide evidence of vertical CO2 leakage linked to known faults. U-Th dating of travertine deposits shows leakage varies along a single fault and that individual seeps have lifespans of up to 200 ka. Whilst the total volumes of CO2 required to form the travertine deposits are high, time-averaged leakage equates to a linear rate of less than 0.01%/yr. Hence, even this natural geological storage site, which would be deemed to be of too high risk to be selected for engineered geologic storage, is adequate to store CO2 for climate mitigation purposes
ΠΠ΅ΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΎΠ΅ ΡΡΡΠΎΠ΅Π½ΠΈΠ΅ ΠΈ ΠΏΠ΅ΡΡΠΏΠ΅ΠΊΡΠΈΠ²Ρ Π²Π²ΠΎΠ΄Π° Π² ΡΠ°Π·ΡΠ°Π±ΠΎΡΠΊΡ ΠΌΠ°Π»ΡΡ ΠΌΠ΅ΡΡΠΎΡΠΎΠΆΠ΄Π΅Π½ΠΈΠΉ, Π½Π° ΠΏΡΠΈΠΌΠ΅ΡΠ΅ Π‘ΡΠΎΠ»Π±ΠΎΠ²ΠΎΠ³ΠΎ ΠΌΠ΅ΡΡΠΎΡΠΎΠΆΠ΄Π΅Π½ΠΈΡ
Π Π°ΡΡΠΌΠΎΡΡΠ΅Π½Ρ Π³Π΅ΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΎΠ΅ ΡΡΡΠΎΠ΅Π½ΠΈΠ΅, Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊΠΈ Π½Π΅ΠΎΠ΄Π½ΠΎΡΠΎΠ΄Π½ΠΎΡΡΠΈ ΠΏΡΠΎΠ΄ΡΠΊΡΠΈΠ²Π½ΡΡ
ΠΏΠ»Π°ΡΡΠΎΠ² Π‘ΡΠΎΠ»Π±ΠΎΠ²ΠΎΠ³ΠΎ ΠΌΠ΅ΡΡΠΎΡΠΎΠΆΠ΄Π΅Π½ΠΈΡ, Π½Π° ΠΎΡΠ½ΠΎΠ²Π°Π½ΠΈΠΈ ΠΊΠΎΡΠΎΡΡΡ
ΡΠ΄Π΅Π»Π°Π½Ρ Π²ΡΠ²ΠΎΠ΄Ρ: Π°) Π½Π΅ΡΡΡΠ½ΡΠ΅ Π·Π°Π»Π΅ΠΆΠΈ Π² ΠΌΠ΅Π»ΠΎΠ²ΡΡ
ΠΈ ΡΡΡΠΊΠΈΡ
ΠΎΡΠ»ΠΎΠΆΠ΅Π½ΠΈΡΡ
ΡΠ°ΡΡΠΌΠ°ΡΡΠΈΠ²Π°ΡΡ ΠΊΠ°ΠΊ ΠΎΠ΄ΠΈΠ½ ΠΎΠ±ΡΠ΅ΠΊΡ ΡΠ°Π·ΡΠ°Π±ΠΎΡΠΊΠΈ; Π±) Π±ΠΎΠ»ΡΡΠ°Ρ ΠΏΠ»ΠΎΡΠ°Π΄Ρ ΠΈ ΠΌΠ°Π»ΡΠ΅ Π·Π½Π°ΡΠ΅Π½ΠΈΡ ΡΡΠ΅Π΄Π½ΠΈΡ
Π½Π΅ΡΡΠ΅Π½Π°ΡΡΡΠ΅Π½Π½ΡΡ
ΡΠΎΠ»ΡΠΈΠ½ Π½Π΅ ΠΏΠΎΠ·Π²ΠΎΠ»ΡΡ ΡΠ°ΡΠΏΠΎΠ»ΠΎΠΆΠΈΡΡ ΡΠΊΡΠΏΠ»ΡΠ°ΡΠ°ΡΠΈΠΎΠ½Π½ΡΠ΅ ΡΠΊΠ²Π°ΠΆΠΈΠ½Ρ ΠΏΠΎ ΡΠ°Π²Π½ΠΎΠΌΠ΅ΡΠ½ΠΎΠΉ ΡΠ΅ΡΠΊΠ΅