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Determination of relative wettability of porous sandstones by imbibition studies
Author(s) -
Grattoni Carlos A.,
Chiotis Efstathios D.,
Dawe Richard A.
Publication year - 1995
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.280640104
Subject(s) - imbibition , wetting , porosity , porous medium , materials science , surface energy , mineralogy , composite material , chemical engineering , geotechnical engineering , geology , engineering , botany , germination , biology
The effective wettability of consolidated sandstone rocks has been determined using the Washburn equation by measuring the rate of imbibition of water, ethanol and their mixtures into cores and thin rectangular sections. The rocks behaved as low energy surfaces with a critical surface with a critical energy of spreading as defined by Zisman, of 28 mN m −1 . This behaviour is believed to be caused by clay particles or organic material present on the pore surfaces. A discussion of the validity and limitations of the Eashburn equation for obtaining effective wettabilities in consolidated porous media is presented. The general conclusion is that effective wettability depends on the preparation and general conditions of the samples.