Enhancing CO2 solubility in the aquifer with the use of a downhole cooler tools

Mohsen Abbaszadeh; Seyed M. Shariatipour

doi:10.1016/j.ijggc.2020.103039

Enhancing CO2 solubility in the aquifer with the use of a downhole cooler tools

Mohsen Abbaszadeh, Seyed M. Shariatipour

School of Energy, Construction and Environment

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

1 Downloads (Pure)

Abstract

Different injection methods have been already proposed by different researchers to improve the solubility of CO2 in formation brine. In this study a novel injection technique is presented, its aim being to cool down (liquefy) the supercritical CO2 injected in a wellbore through the use of downhole cooler equipment. Higher temperature CO2 entering the cooling equipment therefore exits with a lower temperature further downstream. If the temperature of the downhole, where CO2 is in contact with the formation brine, decreases to the lowest possible safe operational temperature, the consequence is an increase in the solubility of CO2 to the highest possible value for that pressure. The colder (liquid) CO2 has a higher solubility in brine, higher density and viscosity, which increases the security of the CO2 storage. Using this method to cool the supercritical CO2 down to a liquid phase increases its solubility at the wellbore, thereby eliminating the risk of a phase change or pressure and rate fluctuation in the liquid CO2 injection from the surface. Additionally the formation will have a lower pressure build-up because CO2 and brine are well mixed, and so less CO2 remains in the free phase.

Original language	English
Article number	103039
Number of pages	9
Journal	International Journal of Greenhouse Gas Control
Volume	97
Early online date	15 May 2020
DOIs	https://doi.org/10.1016/j.ijggc.2020.103039
Publication status	Published - Jun 2020

Bibliographical note

NOTICE: this is the author’s version of a work that was accepted for publication in International Journal of Greenhouse Gas Control. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in International Journal of Greenhouse Gas Control, 97, (2020) DOI: 10.1016/j.ijggc.2020.103039

© 2020, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/

Keywords

CO solubility
CO storage
Cold CO injection
Storage security

ASJC Scopus subject areas

Pollution
Energy(all)
Industrial and Manufacturing Engineering
Management, Monitoring, Policy and Law

Access to Document

10.1016/j.ijggc.2020.103039

Post-PrintAccepted author manuscript, 901 KBLicence: CC BY-NC-ND

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abstract = "Different injection methods have been already proposed by different researchers to improve the solubility of CO2 in formation brine. In this study a novel injection technique is presented, its aim being to cool down (liquefy) the supercritical CO2 injected in a wellbore through the use of downhole cooler equipment. Higher temperature CO2 entering the cooling equipment therefore exits with a lower temperature further downstream. If the temperature of the downhole, where CO2 is in contact with the formation brine, decreases to the lowest possible safe operational temperature, the consequence is an increase in the solubility of CO2 to the highest possible value for that pressure. The colder (liquid) CO2 has a higher solubility in brine, higher density and viscosity, which increases the security of the CO2 storage. Using this method to cool the supercritical CO2 down to a liquid phase increases its solubility at the wellbore, thereby eliminating the risk of a phase change or pressure and rate fluctuation in the liquid CO2 injection from the surface. Additionally the formation will have a lower pressure build-up because CO2 and brine are well mixed, and so less CO2 remains in the free phase.",

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