z-logo
open-access-imgOpen Access
Swelling of Shales by Supercritical Carbon Dioxide and Its Relationship to Sorption
Author(s) -
Xiang Ao,
Zhilin Qi,
Zuping Xiang,
Zhiqiang Li,
Hai Qu,
Ziyi Wang
Publication year - 2020
Publication title -
acs omega
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.779
H-Index - 40
ISSN - 2470-1343
DOI - 10.1021/acsomega.0c02118
Subject(s) - sorption , swelling , supercritical carbon dioxide , carbon dioxide , supercritical fluid , oil shale , environmental chemistry , chemistry , environmental science , chemical engineering , waste management , organic chemistry , adsorption , engineering
Shale gas is a promising energy source offering additional energy security over concerns of fossil fuel depletion. Injecting CO 2 into depleted shale gas reservoirs might provide a feasible solution for CO 2 storage and enhanced gas recovery. However, shale strain caused by the CO 2 injection as well as CO 2 sequestration in the reservoir needs to be considered during shale gas production. For this purpose, this paper examines the adsorption capacities, CO 2 -induced swelling, and He-induced strain of shales at 0-16 MPa and 35-75 °C. The maximum excess adsorption at different temperatures correlated with the bulk phase density: as the CO 2 temperature increased, the maximum excess adsorption density decreased. The density of the adsorbed phase, obtained using the Dubinin-Radushkevich model, was used to fit the excess adsorption data. At low pressure, the CO 2 -induced strain on shale was caused by the gas adsorption, whereas at high pressure, it was caused by gas pressure. The absolute adsorption linearly correlated with the adsorption-induced strain.

The content you want is available to Zendy users.

Already have an account? Click here to sign in.
Having issues? You can contact us here
Accelerating Research

Address

John Eccles House
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom