Patent ID: 7900700
Filing Date: 2011-03-08
Classification: E21B,G01V

Abstract:
1. A method of determining completion criteria for a coal bed methane reservoir having a plurality of coal seams, comprising: obtaining an acoustic log and a resistivity image log for each of the plurality of coal seams; determining an acoustically determined cleat density for each of the plurality of coal seams using the corresponding acoustic logs; determining maximum horizontal stress direction for each of the plurality of coal seams using the corresponding acoustic logs; determining cleat orientation for each of the plurality of coal seams using the corresponding resistivity image logs; selecting one of the plurality of coal seams upon which to perform a completion operation based on the acoustically determined cleat density, maximum horizontal stress direction, and cleat orientation; and determining the completion criteria for the coal bed methane reservoir using the acoustically determined cleat density, maximum horizontal stress direction, and cleat orientation, wherein the completion operation is performed on the coal bed methane reservoir using the completion criteria.