A calculation model for liquid CO2 injection into shallow sub-seabed aquifer

Kyuro Sasaki, Satoshi Akibayashi

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

This study provided a model for calculating the aquifer transmissibility, the CO2 injection rate, the inner diameter of the injection well, and the number of wells for liquid CO2 disposal in the aquifer. The possibility of disposing liquid CO2 in an aquifer just beneath the sea floor was shown, based on the equilibrium lines in the pressure and temperature map. Our study focused on the feasibility of liquid CO2 disposal below the critical temperature because CO2 can be denser in the low-pressure range (below the critical temperature) than above the critical temperature. An aquifer about 200 m under the sea floor, at a water depth of around 500 m (700 m below the sea surface), will serve for liquid CO2 disposal. In the aquifer the absolute pressure is approximately 7.3 MPa, sea-floor temperature is about 4-6°C, and aquifer temperature is about 15-20°C. Therefore, it can be assumed that CO2 dissolves in the aquifer water, and liquid CO2 replaces the water. This means that under the previous conditions, more CO2 can be injected into the aquifer compared to supercritical conditions. Furthermore, by forming a cap of CO2 hydrates, the sediment between the sea floor and the aquifer, prevents CO2 leakage to the sea. Even without the cap, liquid CO2 and CO2 hydrates form at the sea floor, so the CO2 exerts no large environmental impact.

Original languageEnglish
Pages (from-to)211-225
Number of pages15
JournalAnnals of the New York Academy of Sciences
Volume912
Publication statusPublished - Jan 1 2000

Fingerprint

Groundwater
Aquifers
Oceans and Seas
aquifer
Injections
liquid
Liquids
seafloor
Temperature
temperature
Hydrates
Pressure
Water
calculation
Liquid
well
equilibrium line
leakage
Environmental impact
low pressure

All Science Journal Classification (ASJC) codes

  • Global and Planetary Change
  • Fuel Technology
  • Fluid Flow and Transfer Processes

Cite this

A calculation model for liquid CO2 injection into shallow sub-seabed aquifer. / Sasaki, Kyuro; Akibayashi, Satoshi.

In: Annals of the New York Academy of Sciences, Vol. 912, 01.01.2000, p. 211-225.

Research output: Contribution to journalArticle

@article{f42121369e8a4afd8cfe23f4e80ed26b,
title = "A calculation model for liquid CO2 injection into shallow sub-seabed aquifer",
abstract = "This study provided a model for calculating the aquifer transmissibility, the CO2 injection rate, the inner diameter of the injection well, and the number of wells for liquid CO2 disposal in the aquifer. The possibility of disposing liquid CO2 in an aquifer just beneath the sea floor was shown, based on the equilibrium lines in the pressure and temperature map. Our study focused on the feasibility of liquid CO2 disposal below the critical temperature because CO2 can be denser in the low-pressure range (below the critical temperature) than above the critical temperature. An aquifer about 200 m under the sea floor, at a water depth of around 500 m (700 m below the sea surface), will serve for liquid CO2 disposal. In the aquifer the absolute pressure is approximately 7.3 MPa, sea-floor temperature is about 4-6°C, and aquifer temperature is about 15-20°C. Therefore, it can be assumed that CO2 dissolves in the aquifer water, and liquid CO2 replaces the water. This means that under the previous conditions, more CO2 can be injected into the aquifer compared to supercritical conditions. Furthermore, by forming a cap of CO2 hydrates, the sediment between the sea floor and the aquifer, prevents CO2 leakage to the sea. Even without the cap, liquid CO2 and CO2 hydrates form at the sea floor, so the CO2 exerts no large environmental impact.",
author = "Kyuro Sasaki and Satoshi Akibayashi",
year = "2000",
month = "1",
day = "1",
language = "English",
volume = "912",
pages = "211--225",
journal = "Annals of the New York Academy of Sciences",
issn = "0077-8923",
publisher = "Wiley-Blackwell",

}

TY - JOUR

T1 - A calculation model for liquid CO2 injection into shallow sub-seabed aquifer

AU - Sasaki, Kyuro

AU - Akibayashi, Satoshi

PY - 2000/1/1

Y1 - 2000/1/1

N2 - This study provided a model for calculating the aquifer transmissibility, the CO2 injection rate, the inner diameter of the injection well, and the number of wells for liquid CO2 disposal in the aquifer. The possibility of disposing liquid CO2 in an aquifer just beneath the sea floor was shown, based on the equilibrium lines in the pressure and temperature map. Our study focused on the feasibility of liquid CO2 disposal below the critical temperature because CO2 can be denser in the low-pressure range (below the critical temperature) than above the critical temperature. An aquifer about 200 m under the sea floor, at a water depth of around 500 m (700 m below the sea surface), will serve for liquid CO2 disposal. In the aquifer the absolute pressure is approximately 7.3 MPa, sea-floor temperature is about 4-6°C, and aquifer temperature is about 15-20°C. Therefore, it can be assumed that CO2 dissolves in the aquifer water, and liquid CO2 replaces the water. This means that under the previous conditions, more CO2 can be injected into the aquifer compared to supercritical conditions. Furthermore, by forming a cap of CO2 hydrates, the sediment between the sea floor and the aquifer, prevents CO2 leakage to the sea. Even without the cap, liquid CO2 and CO2 hydrates form at the sea floor, so the CO2 exerts no large environmental impact.

AB - This study provided a model for calculating the aquifer transmissibility, the CO2 injection rate, the inner diameter of the injection well, and the number of wells for liquid CO2 disposal in the aquifer. The possibility of disposing liquid CO2 in an aquifer just beneath the sea floor was shown, based on the equilibrium lines in the pressure and temperature map. Our study focused on the feasibility of liquid CO2 disposal below the critical temperature because CO2 can be denser in the low-pressure range (below the critical temperature) than above the critical temperature. An aquifer about 200 m under the sea floor, at a water depth of around 500 m (700 m below the sea surface), will serve for liquid CO2 disposal. In the aquifer the absolute pressure is approximately 7.3 MPa, sea-floor temperature is about 4-6°C, and aquifer temperature is about 15-20°C. Therefore, it can be assumed that CO2 dissolves in the aquifer water, and liquid CO2 replaces the water. This means that under the previous conditions, more CO2 can be injected into the aquifer compared to supercritical conditions. Furthermore, by forming a cap of CO2 hydrates, the sediment between the sea floor and the aquifer, prevents CO2 leakage to the sea. Even without the cap, liquid CO2 and CO2 hydrates form at the sea floor, so the CO2 exerts no large environmental impact.

UR - http://www.scopus.com/inward/record.url?scp=0033940153&partnerID=8YFLogxK

UR - http://onlinelibrary.wiley.com/doi/10.1111/j.1749-6632.2000.tb06775.x/full

M3 - Article

AN - SCOPUS:0033940153

VL - 912

SP - 211

EP - 225

JO - Annals of the New York Academy of Sciences

JF - Annals of the New York Academy of Sciences

SN - 0077-8923

ER -