EFFECTS OF PROPPANT ON FRACTURE COMPRESSIBILITY IN COAL SEAM
T. V. Shilova
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Keywords: Угольный пласт, дегазация, гидроразрыв, сжимаемость трещины, проппант, Coal seam, degassing, hydraulic fracturing, fracture compressibility, proppant
Abstract
The paper discusses the problem of enhancement of gas well drainage productivity in coal seams using the hydraulic fracturing technology. Filling of a fracture with proppant provides a long-term increase in the well drainage performance. Results of the laboratory experiments to determine coal permeability under various stress conditions are provided. The experimental results have shown that the use of proppants significantly reduces the fracture compressibility, while permeability of the propped fracture becomes less sensitive to changes in stress conditions.
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