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dc.contributor.authorRoshan, H.
dc.contributor.authorAl-Yaseri, Ahmed
dc.contributor.authorSarmadivaleh, Mohammad
dc.contributor.authorIglauer, Stefan
dc.date.accessioned2017-01-30T14:45:42Z
dc.date.available2017-01-30T14:45:42Z
dc.date.created2016-05-11T19:30:17Z
dc.date.issued2016
dc.identifier.citationRoshan, H. and Al-Yaseri, A. and Sarmadivaleh, M. and Iglauer, S. 2016. On wettability of shale rocks. Journal of Colloid and Interface Science. 475: pp. 104-111.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/40793
dc.identifier.doi10.1016/j.jcis.2016.04.041
dc.description.abstract

The low recovery of hydraulic fracturing fluid in unconventional shale reservoirs has been in the centre of attention from both technical and environmental perspectives in the last decade. One explanation for the loss of hydraulic fracturing fluid is fluid uptake by the shale matrix; where capillarity is the dominant process controlling this uptake. Detailed understanding of the rock wettability is thus an essential step in analysis of loss of the hydraulic fracturing fluid in shale reservoirs, especially at reservoir conditions. We therefore performed a suit of contact angle measurements on a shale sample with oil and aqueous ionic solutions, and tested the influence of different ion types (NaCl, KCl, MgCl2, CaCl2), concentrations (0.1, 0.5 and 1M), pressures (0.1, 10 and 20MPa) and temperatures (35 and 70°C). Furthermore, a physical model was developed based on the diffuse double layer theory to provide a framework for the observed experimental data.Our results show that the water contact angle for bivalent ions is larger than for monovalent ions; and that the contact angle (of both oil and different aqueous ionic solutions) increases with increase in pressure and/or temperature; these increases are more pronounced at higher ionic concentrations. Finally, the developed model correctly predicted the influence of each tested variable on contact angle. Knowing contact angle and therefore wettability, the contribution of the capillary process in terms of water uptake into shale rocks and the possible impairment of hydrocarbon production due to such uptake can be quantified.

dc.publisherAcademic Press
dc.titleOn wettability of shale rocks
dc.typeJournal Article
dcterms.source.volume475
dcterms.source.startPage104
dcterms.source.endPage111
dcterms.source.titleJournal of Colloid and Interface Science
curtin.departmentDepartment of Petroleum Engineering
curtin.accessStatusFulltext not available


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