Open AccessExperimental evaluation of the impact of the interactions of CO 2 ‐SO 2 , brine, and reservoir rock on petrophysical properties: A case study from the Ketzin test site, Germany
Author(s) -
Kummerow Juliane,
Spangenberg Erik
Publication year - 2011
Publication title -
geochemistry, geophysics, geosystems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.928
H-Index - 136
ISSN - 1525-2027
DOI - 10.1029/2010gc003469
Subject(s) - petrophysics , dissolution , electrical resistivity and conductivity , permeability (electromagnetism) , geology , brine , soil science , aquifer , petroleum engineering , geotechnical engineering , mineralogy , porosity , groundwater , membrane , thermodynamics , chemical engineering , chemistry , physics , electrical engineering , engineering , biochemistry
The objective of this study is to evaluate the impact of impure CO 2 on a possible CO 2 repository. Here we present experimental data on the simulation of the injection of pure CO 2 and CO 2 and cocontaminant SO 2 into a saline aquifer. Long‐term exposure experiments with pure CO 2 reveal no significant changes in the petrophysical properties (electrical resistivity, elastic wave velocity, and permeability). In contrast, for the injection of CO 2 and cocontaminant SO 2 (1 vol %) we have observed significant and irreversible changes of all monitored physical parameters. On the one hand, the decrease of P wave velocity and the increase of electrical resistivity indicate a dissolution of some framework material. On the other hand, the decrease of permeability points to the mobilization and redistribution of fines. These data might be relevant for subsequent modeling and estimations about tolerable concentration limits regarding the contaminants of CO 2 to be stored.