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Behavior of coal-gas reservoirs
  • Published Date:
    April 1969
  • Language:
    English
Filetype[PDF-1021.29 KB]


Details:
  • Personal Authors:
  • Corporate Authors:
    United States. Bureau of Mines. ; United States. Bureau of Mines. Methane Control Program. ;
  • Description:
    "Gas occurs in coalbeds in an adsorbed and a free gas state. Adsorbed gas is stored in the micropore structure and its transport is governed by Fick's law. The free gas occurs in the fracture system and flows according to Darcy's law . These two modes of mass transport are interdependent. Production decline curves of coal-gas wells are of the constant percentage decline type and, thus, show no indications of flow characteristics peculiar to coal-gas reservoirs. The effectiveness of surface boreholes as a degasification scheme depends upon both good fracture permeability and a high fracture density. Conventional methods of reservoir engineering analysis are not applicable to coalbeds." - NIOSHTIC-2

    NIOSHTIC no.10000175

  • Document Type:
  • Supporting Files:
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