Adsorbed Organic Material and Its Control on Wettability
| Autor: | Kim N. Dalby, Tue Hassenkam, Nicolas Bovet, Susan L. S. Stipp, J. Matthiesen |
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| Rok vydání: | 2016 |
| Předmět: |
Chemistry
General Chemical Engineering Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology 010502 geochemistry & geophysics 021001 nanoscience & nanotechnology 01 natural sciences Salinity Solvent Fuel Technology Adsorption Chemical force microscopy Chemical engineering Environmental chemistry Seawater Wetting 0210 nano-technology Core plug Carbon 0105 earth and related environmental sciences |
| Zdroj: | Energy & Fuels. 31:55-64 |
| ISSN: | 1520-5029 0887-0624 |
| DOI: | 10.1021/acs.energyfuels.6b00627 |
| Popis: | Laboratory core flood and field scale tests have demonstrated that 5–40% more oil can be released from sandstone reservoirs by injecting low salinity water, rather than high salinity fluids, such as seawater or formation water. The effect has been explained by a change in wettability of the minerals that form the pore surfaces, as a result of the decrease in divalent cation concentration. We have previously demonstrated that, even for solvent cleaned core samples, mineral surfaces retain a significant quantity of carbon containing material and this affects wettability and response to changed salinity. Here we quantified the response of sandstone core plug material in its preserved state (i.e., after storage in kerosene) and after the same core plug material was treated with ethanol and ozone to remove adsorbed organic compounds. We used the chemical force microscopy (CFM) mode of atomic force microscopy (AFM) to directly measure the adhesion force for two types of molecules on pore surfaces of individual ... |
| Databáze: | OpenAIRE |
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