Solubility trapping as a potential secondary mechanism for CO2 sequestration during enhanced gas recovery by CO2 injection in conventional natural gas reservoirs : an experimental approach

Abba, MK ORCID: https://orcid.org/0000-0002-9333-5277, Abbas, AJ ORCID: https://orcid.org/0000-0002-0709-1713, Nasr, GG ORCID: https://orcid.org/0000-0001-7913-5802, Athari, A, Burby, ML ORCID: https://orcid.org/0000-0003-1107-3216, Saidu, B ORCID: https://orcid.org/0000-0002-7272-0694 and Suleiman, SM ORCID: https://orcid.org/0000-0003-2098-8645 2019, 'Solubility trapping as a potential secondary mechanism for CO2 sequestration during enhanced gas recovery by CO2 injection in conventional natural gas reservoirs : an experimental approach' , Journal of Natural Gas Science and Engineering, 71 .

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Abstract

This study aims to experimentally investigate the potential of solubility trapping mechanism in increasing CO2 storage during EGR by CO2 injection and sequestration in conventional natural gas reservoirs. A laboratory core flooding process was carried out to simulate EGR on a sandstone core at 0, 5, 10 wt% NaCl formation water salinity at 1300 psig, 50 °C and 0.3 ml/min injection rate. The results show that CO2 storage capacity was improved significantly when solubility trapping was considered. Lower connate water salinities (0 and 5 wt%) showed higher CO2 solubility from IFT measurements. With 10% connate water salinity, the highest accumulation of the CO2 in the reservoir was realised with about 63% of the total CO2 injected stored; an indication of improved storage capacity. Therefore, solubility trapping can potentially increase the CO2 storage capacity of the gas reservoir by serving as a secondary trapping mechanism in addition to the primary structural and stratigraphic trapping and improving CH4 recovery.

Item Type:	Article
Schools:	Schools > School of Computing, Science and Engineering
Journal or Publication Title:	Journal of Natural Gas Science and Engineering
Publisher:	Elsevier
ISSN:	1875-5100
Related URLs:	Publication
Depositing User:	SM Suleiman
Date Deposited:	02 Oct 2019 12:40
Last Modified:	23 Sep 2020 02:30
URI:	http://usir.salford.ac.uk/id/eprint/52498

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