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Title: A LIGHTWEIGHT PROPPANT INFLUENCE ON THE COAL SPECIMEN PERMEABILITY
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A LIGHTWEIGHT PROPPANT INFLUENCE ON THE COAL SPECIMEN PERMEABILITY
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1314-2704
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English
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18
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1.3
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In the paper the problem of coal permeability enhancement by hydraulic fracturing with the lightweight proppant is considered. The used proppant consists of hollow aluminosilicate microspheres ASPM-500. The experimental results of the lightweight proppant influence on the long-flame coal permeability are presented. The permeability of coal with a propped crack is reduced by 4-9 times as the confining pressure is increased by 5 times from 1 to 5 MPa. The permeability decrease may be caused by the proppant pack compaction in the fracture. The use of lightweight proppant, consisting of aluminosilicate hollow microspheres, increases the permeability of long-flame coal with propped fracture (width 0.5 mm) by 7-19.5 times comparing to a non-propped it, as the confining pressure is risen by 5 times from 1MPa to 5 MPa. The effect of the proppant use increases with the rise of compression loads. So, it has been experimentally established, that at confining pressures P = 1, 2 MPa, the coal permeability increases by 7-8.5 times, at P = 3, 4 MPa, by 11-14 times, and at P = 5 MPa by 19.5 times. The lightweight proppant use is a promising direction in the hydraulic fracturing technology development for the degassing of coal seams.
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conference
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18th International Multidisciplinary Scientific GeoConference SGEM 2018
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18th International Multidisciplinary Scientific GeoConference SGEM 2018, 02-08 July, 2018
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Proceedings Paper
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STEF92 Technology
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International Multidisciplinary Scientific GeoConference-SGEM
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Bulgarian Acad Sci; Acad Sci Czech Republ; Latvian Acad Sci; Polish Acad Sci; Russian Acad Sci; Serbian Acad Sci & Arts; Slovak Acad Sci; Natl Acad Sci Ukraine; Natl Acad Sci Armenia; Sci Council Japan; World Acad Sci; European Acad Sci, Arts & Letters; Ac
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27-32
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02-08 July, 2018
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website
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cdrom
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233
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coal; permeability; hydraulic fracturing; lightweight proppant; degassing
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