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The streaming potential of liquid carbon dioxide in Berea sandstone
Author(s) -
Moore Jeffrey R.,
Glaser Steven D.,
Morrison H. Frank,
Hoversten G. Michael
Publication year - 2004
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2004gl020774
Subject(s) - electrokinetic phenomena , streaming current , carbon dioxide , electrical resistivity and conductivity , analytical chemistry (journal) , coupling (piping) , mineralogy , relative humidity , materials science , chemistry , thermodynamics , environmental chemistry , composite material , nanotechnology , organic chemistry , physics , electrical engineering , engineering
We report here, for the first time, evolution of the streaming potential coupling coefficient as liquid carbon dioxide infiltrates Berea sandstone. Using 125 Ω‐m tap water, the coupling coefficient determined before and after each CO 2 flood of five samples averaged approximately −30 mV/0.1 MPa. After liquid CO 2 passed through the specimens displacing all mobile pore water, trapped water remained and the coupling coefficient was approximately −3 mV/0.1 MPa. A bound water limit of the coupling coefficient for liquid CO 2 flow was found using an air‐dried sample to be −0.02 mV/0.1 MPa. For initially water‐saturated samples, bulk resistivity varied during CO 2 invasion from 330 Ω‐m, to 150 Ω‐m during CO 2 /water mixing, to a final value of 380 Ω‐m. Results suggest that trapped and bound water control electrical conduction and the electrokinetic response. Applications include monitoring CO 2 injectate in subsurface reservoirs using the self potential method.