Subject(s): WASTE ISOLATION PILOT PLANT (NM)--EVALUATION | PETROLEUM RESERVES--NEW MEXICO--CARLSBAD REGION | NATURAL GAS RESERVES--NM--CARLSBAD REGION | PETROLEUM--GEOLOGY--NM--CARLSBAD REGION | GAS RESERVOIRS--NEW MEXICO--CARLSBAD REGION | OIL FIELDS--NEW MEXICO--CARLSBAD REGION