This paper discusses remedial hydraulic stimulations used to increase production rates from two coalbed methane wells at GRI's Rock Creek project. The poorly performing stimulation was plugged with cement and the well restimulated using a non-damaging gel, nitrogen foam, and sand stimulation. These treatments suggest: 1) cement can be used to abandon undesirable hydraulic fractures prior to restimulation, 2) the use of an alternative gel polymer, identified by core testing for a specific coal sample, minimized permeability damage during stimulation, and 3) a special foam and sand stimulation created a more effective fracture than the original water and sand treatment in the same well.

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