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ISSN Online: 2377-424X

ISBN Print: 978-1-56700-474-8

ISBN Online: 978-1-56700-473-1

International Heat Transfer Conference 16
August, 10-15, 2018, Beijing, China

SIMULATION OF WETTABILITY EFFECTS ON GAS-WATER FLOW IN POROUS MEDIA

Get access (open in a dialog) DOI: 10.1615/IHTC16.cat.023191
pages 1565-1570

Abstract

Wettability has significant influence on CO2 storage capacity of saline acquire, since it effects the seepage characters of caprock, in terms of relative permeability and capillary pressure. Thus, it is great importance to investigate effects of wettability on gas-water flow in caprocks. In this work, we studied influence of wettability on CO2-brine two phase flow behavior in a homogenous Berea sandstone based on pore network flow simulation method. Results indicates that, when system wettability changes from strong water wet to strong CO2 wet, the aqueous phase relative permeability decreases while CO2 relative permeability increases under the same water saturation conditions for draining cycle while both CO2 and water relative permeabilities decrease and there is a distinct change in the water relative permeability during the imbibition cycle. The fluid flow of gas and water is much more better in strong water wet system (θ = 10°) than completely CO2 wet system (θ = 160°) and the whole system is in stable displacement state, thus, CO2-brine displacement period is longer during the draining process. Therefore, a saline acquire with strong water wet properties might be the best site for CO2 storage, due to the better CO2 flow characteristics of strong water wet porous media.