Greater-than-one relative permeability in mixed-wet limestone

Magali Christensen, Luca Romanello, Yukie Tanino

Research output: Contribution to conferencePaper

Abstract

Waterflood relative permeability was measured in Indiana limestone under five mixed-wet conditions, as characterized by macroscopic contact angles on polished calcite which ranged from 0w = 55° to 150°, and two Darcy velocities: Uw = 1.5 μm/s and 30 μm/s. Oil relative permeability at initial oil saturation decreased and brine relative permeability at residual oil saturation increased with increasing 0w under the conditions considered presently. Greater-than-one end-point relative permeability was observed at 0w < 90° for oil and at 0w > 130° for brine. End-point brine relative permeabilities were larger at the larger Uw under all oil-wet conditions considered, i.e., 0w > 90 ̊. In contrast to recent literature that associate greater-than-one permeability to the flow of non-wetting fluid against surface, we observed enhanced permeability even when the flowing fluid was the wetting phase. Our results demonstrate that models assuming kr ≤ 1 underestimate fluid displacement for a wider range of contact angles than previously documented.
Original languageEnglish
Number of pages9
Publication statusPublished - Aug 2017
EventThe 31st International Symposium of the Society of Core Analysts - The Hofburg Palace, Vienna, Austria
Duration: 28 Aug 20171 Sep 2017

Conference

ConferenceThe 31st International Symposium of the Society of Core Analysts
CountryAustria
CityVienna
Period28/08/171/09/17

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limestone
permeability
brine
oil
fluid
saturation
wetting
calcite

Cite this

Christensen, M., Romanello, L., & Tanino, Y. (2017). Greater-than-one relative permeability in mixed-wet limestone. Paper presented at The 31st International Symposium of the Society of Core Analysts, Vienna, Austria.

Greater-than-one relative permeability in mixed-wet limestone. / Christensen, Magali; Romanello, Luca; Tanino, Yukie.

2017. Paper presented at The 31st International Symposium of the Society of Core Analysts, Vienna, Austria.

Research output: Contribution to conferencePaper

Christensen, M, Romanello, L & Tanino, Y 2017, 'Greater-than-one relative permeability in mixed-wet limestone' Paper presented at The 31st International Symposium of the Society of Core Analysts, Vienna, Austria, 28/08/17 - 1/09/17, .
Christensen M, Romanello L, Tanino Y. Greater-than-one relative permeability in mixed-wet limestone. 2017. Paper presented at The 31st International Symposium of the Society of Core Analysts, Vienna, Austria.
Christensen, Magali ; Romanello, Luca ; Tanino, Yukie. / Greater-than-one relative permeability in mixed-wet limestone. Paper presented at The 31st International Symposium of the Society of Core Analysts, Vienna, Austria.9 p.
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