Estimation of the Microstructural Wettability of Oil-Saturated Rocks Using a Scanning Electron Microscope

A technique for determining the microstructural wettability of a carbonate rock using a scanning electron microscope (SEM) in the low-vacuum mode employing a special chamber and the results of respective experiments are described. To this end, the principle of the spontaneous formation of microscopi...

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Bibliographic Details
Published in:Surface investigation, x-ray, synchrotron and neutron techniques x-ray, synchrotron and neutron techniques, 2021-09, Vol.15 (5), p.980-986
Main Author: Kuzmin, V. A.
Format: Article
Language:English
Subjects:
Carbonate rocks
Chemistry and Materials Science
Condensates
Contact angle
Electron microscopes
Materials Science
Scanning electron microscopy
Surface properties
Surfaces and Interfaces
Thin Films
Water drops
Wettability
Wetting
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Summary:A technique for determining the microstructural wettability of a carbonate rock using a scanning electron microscope (SEM) in the low-vacuum mode employing a special chamber and the results of respective experiments are described. To this end, the principle of the spontaneous formation of microscopic water droplets on the sample surface as a result of vapor condensation and measurement of the contact angle on SEM images is implemented. The possibility of determining the surface properties of dispersed particles with different mineral compositions is shown. Analysis of the surface properties of the pore space of oil-saturated rocks using a SEM makes it possible to specify the wetting properties in the pore space at the microscale level. These studies are of practical importance for petroleum geology. Detailed determination of the wettability makes it possible to predict the water cut of the produced products and provides additional possibilities for adopting special methods to decrease the amount of residual oil in the reservoir and increase the production of hydrocarbons.
ISSN:1027-4510
1819-7094
DOI:10.1134/S1027451021040297