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Title: Impact of wettability alteration on 3D nonwetting phase trapping and transport

Abstract

We investigate capillary trapping and fluid migration via x-ray computed microtomography (x-ray CMT) of nonwetting phase (air) and wetting phase (brine) in Bentheimer sandstone cores which have been treated to exhibit different degrees of uniform wettability. x-Ray CMT scans were acquired at multiple steps during drainage and imbibition processes, as well as at the endpoints; allowing for assessment of the impact of wettability on nonwetting phase saturation and cluster size distribution, connectivity, topology and efficiency of trapping. Compared with untreated (water-wet) Bentheimer sandstone, cores treated with tetramethoxylsilane (TMS) were rendered weakly water-wet, and cores treated with octadecyltrichlorosilane (OTS) demonstrate intermediate-wet characteristics. As apparent contact angle increases, drainage flow patterns deviate from those derived for water-wet systems, total residual trapping and trapping efficiency decrease, and buoyancy plays a larger role during nonwetting phase mobilization; this has significant implications for CO 2 migration and trapping during CO 2 sequestration operations.

Authors:
; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1351360
Resource Type:
Journal Article
Resource Relation:
Journal Name: International Journal of Greenhouse Gas Control; Journal Volume: 46; Journal Issue: C
Country of Publication:
United States
Language:
ENGLISH
Subject:
54 ENVIRONMENTAL SCIENCES

Citation Formats

Herring, Anna L., Sheppard, Adrian, Andersson, Linnéa, and Wildenschild, Dorthe. Impact of wettability alteration on 3D nonwetting phase trapping and transport. United States: N. p., 2016. Web. doi:10.1016/j.ijggc.2015.12.026.
Herring, Anna L., Sheppard, Adrian, Andersson, Linnéa, & Wildenschild, Dorthe. Impact of wettability alteration on 3D nonwetting phase trapping and transport. United States. doi:10.1016/j.ijggc.2015.12.026.
Herring, Anna L., Sheppard, Adrian, Andersson, Linnéa, and Wildenschild, Dorthe. Tue . "Impact of wettability alteration on 3D nonwetting phase trapping and transport". United States. doi:10.1016/j.ijggc.2015.12.026.
@article{osti_1351360,
title = {Impact of wettability alteration on 3D nonwetting phase trapping and transport},
author = {Herring, Anna L. and Sheppard, Adrian and Andersson, Linnéa and Wildenschild, Dorthe},
abstractNote = {We investigate capillary trapping and fluid migration via x-ray computed microtomography (x-ray CMT) of nonwetting phase (air) and wetting phase (brine) in Bentheimer sandstone cores which have been treated to exhibit different degrees of uniform wettability. x-Ray CMT scans were acquired at multiple steps during drainage and imbibition processes, as well as at the endpoints; allowing for assessment of the impact of wettability on nonwetting phase saturation and cluster size distribution, connectivity, topology and efficiency of trapping. Compared with untreated (water-wet) Bentheimer sandstone, cores treated with tetramethoxylsilane (TMS) were rendered weakly water-wet, and cores treated with octadecyltrichlorosilane (OTS) demonstrate intermediate-wet characteristics. As apparent contact angle increases, drainage flow patterns deviate from those derived for water-wet systems, total residual trapping and trapping efficiency decrease, and buoyancy plays a larger role during nonwetting phase mobilization; this has significant implications for CO2 migration and trapping during CO2 sequestration operations.},
doi = {10.1016/j.ijggc.2015.12.026},
journal = {International Journal of Greenhouse Gas Control},
number = C,
volume = 46,
place = {United States},
year = {Tue Mar 01 00:00:00 EST 2016},
month = {Tue Mar 01 00:00:00 EST 2016}
}