Laboratory measurements have shown that the permeability of coal samples varies significantly for ranges of pressure encountered during the testing of coalbed methane wells.

A laboratory pressure-permeability relation has been used with a numerical, two-phase coalbed methane simulator to examine the effect of pressure-dependent permeability on well-tests and on production of coalbed methane.

Keywords:
long-term production, exponent, coalbed methane, well-test analysis, variation, conventional analysis, constant-rate test, permeability compressibility, permeability, fluid pressure
Subjects:
Reservoir Simulation, Formation Evaluation & Management, Unconventional and Complex Reservoirs, Drillstem/well testing, Coal seam gas
Copyright 1984, Society of Petroleum Engineers of AIME
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