SYSTEMATIC MAPPING OF NATURAL FRACTURES TO PREDICT COALBED METHANE PRODUCTION

RELIABLE MAPPING OF NATURAL FRACTURE SYSTEMS EXISTING IN COAL BEDS IS THE KEY TO EFFICIENT DEVELOPMENT OF THE LARGE VOLUME COALBED METHANE RESOURCES IN-PLACE IN THE PICEANCE BASIN LOCATED IN NORTHWEST COLORADO. ADEQUATE PERMEABILITY TO SUPPORT COMMERCIAL PRODUCTION REQUIRES THE PRESENCE OF A WELL DEVELOPED COAL CLEAT SYSTEM. IN PHASE I INNOVATIVE EVALUATION METHODOLOGY WILL INTEGRATE DETAILED DIRECT COAL CLEAT MEASUREMENTS, INDIRECT INDICATORS OF CLEAT INTENSITY, AND GEOPHYSICAL INTERPRETATIONS WITH TREND CONTROL FROM AREA STRUCTURE AND STRATIGRAPHY TO PRODUCE MAPS DELINEATING THE PATTERN OF COAL CLEAT INTENSITY AND ORIENTATION. DISTRIBUTION AND RELATIVE IMPORTANCE OF LOCAL RESERVOIR PERMEABILITY HETEROGENEITIES WILL ALSO BE EVALUATED. THE STUDY AREA ON THE NORTH MARGIN OF THE PICEANCE BASIN INCLUDES APPROXIMATELY 25 RECENTLY COMPLETED COALBED METHANE WELLS WHICH WILL PROVIDE PRODUCTION DATA TO DIRECTLY TEST AND CALIBRATE THE MAPS FOR PREDICTION OF COALBED METHANE RECOVERABILITY. IF TESTING PROVES THE UTILITY OF THIS RECOVERABILITY EVALUATION, A SIGNIFICANT LEVEL OF TRUE INNOVATION WILL BE ACHIEVED. NEW TECHNOLOGY WILL PROVIDE KNOWLEDGE ESSENTIAL FOR EFFICIENT RECOVERY OF THIS DESIRABLE RESOURCE DEVELOPMENT, AND DEFINING SIGNIFICANT NEW U.S. CLEAN ENERGY RESERVES.