Effect of oxidation and silane surface treatments of coal powders on relative permeability in packed coal beds

Ge, Lei ORCID: https://orcid.org/0000-0003-2989-0329 and Soares, Fabio Terzini and Mahoney, Shilo and Hamilton, Christopher and Khan, Chawarwan and Steel, Karen and Rufford, Thomas E. and Rudolph, Victor (2019) Effect of oxidation and silane surface treatments of coal powders on relative permeability in packed coal beds. Journal of Natural Gas Science and Engineering, 69 (102931). pp. 1-9. ISSN 1875-5100


Abstract

We studied the influence of wettability on relative permeability by altering the surface chemistry of coal from the Dawson Creek mine (Bowen Basin, Australia) with hydrogen peroxide (D-H2O2) and a silane treatment (Dsilane). The distributions of wetting contact angles measured by a falling particle method were centred around θ = 63° in untreated coal, θ = 56° in D-H2O2, and θ = 89° in D-silane. We constructed homogeneous and artificial cores from the treated powders. Relative permeabilities were measured with N2 and 4 %wt KCl brine by the steady state method in a Hassler-type core flooding apparatus. The relative permeability curves for D-H2O2 had a crossover point at Swx = 0.53, and a higher critical water saturation (Swr = 0.43) than D-untreated (Swr = 0.36). To assess potential of using near-wellbore chemical treatments to facilitate dewatering of coal seams and enhance gas production, we performed a hypothetical reservoir simulation study.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Published version cannot be displayed due to copyright restrictions.
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials (1 Jan 2017 -)
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials (1 Jan 2017 -)
Date Deposited: 08 Oct 2019 04:20
Last Modified: 21 Nov 2019 06:00
Uncontrolled Keywords: coal bed methane; relative permeability; wettability; silane treatment; coal processing
Fields of Research : 03 Chemical Sciences > 0303 Macromolecular and Materials Chemistry > 030304 Physical Chemistry of Materials
09 Engineering > 0914 Resources Engineering and Extractive Metallurgy > 091406 Petroleum and Reservoir Engineering
Socio-Economic Objective: B Economic Development > 85 Energy > 8501 Energy Exploration > 850103 Oil and Gas Exploration
Identification Number or DOI: 10.1016/j.jngse.2019.102931
URI: http://eprints.usq.edu.au/id/eprint/36803

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