期刊
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
卷 22, 期 -, 页码 325-328出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ijggc.2014.01.006
关键词
CO2-wettability; Contact angle measurements; Surface contamination
类别
资金
- Australian National Low Emissions Coal Research and Development (ANLEC RD)
- Australian Coal Association Low Emissions Technology Limited
- Australian Government through the Clean Energy Initiative
CO2-wettability of sandstones is a key variable which determines structural and residual trapping capacities and strongly influences multi-phase fluid dynamics in the rock. An increasing number of researchers has now estimated this wettability by conducting contact angle measurements on quartz, however, there is a large uncertainty associated with the reported data. We demonstrate clearly that the main factor which leads to this broad data spread is due to surface contamination. It is clear that typically inappropriate cleaning methods were used which resulted in artificially high contact angle measurements. We used surface cleaning methods typically prescribed in the surface chemistry community and found that the water contact angle theta on a clean quartz substrate is low, 0-30 degrees, and that theta increases with pressure. We conclude that quartz is strongly water-wet at high pressure conditions. (C) 2014 Elsevier Ltd. All rights reserved.
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