Effect of oxidation and silane surface treatments of coal powders on relative permeability in packed coal beds
Article
Article Title | Effect of oxidation and silane surface treatments of coal powders on relative permeability in packed coal beds |
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ERA Journal ID | 124613 |
Article Category | Article |
Authors | Ge, Lei (Author), Soares, Fabio Terzini (Author), Mahoney, Shilo (Author), Hamilton, Christopher (Author), Khan, Chawarwan (Author), Steel, Karen (Author), Rufford, Thomas E. (Author) and Rudolph, Victor (Author) |
Journal Title | Journal of Natural Gas Science and Engineering |
Journal Citation | 69 (102931), pp. 1-9 |
Number of Pages | 9 |
Year | 2019 |
Place of Publication | United States |
ISSN | 1875-5100 |
2212-3865 | |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.jngse.2019.102931 |
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. |
Keywords | coal bed methane; relative permeability; wettability; silane treatment; coal processing |
ANZSRC Field of Research 2020 | 340305. Physical properties of materials |
401907. Petroleum and reservoir engineering | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | University of Queensland |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q554v/effect-of-oxidation-and-silane-surface-treatments-of-coal-powders-on-relative-permeability-in-packed-coal-beds
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