Quantification Methodology for Underbalanced Drilling with Natural Gas and Formation Gas Recovery

The purpose of this methodology is to quantify greenhouse gas emissions reductions from underbalanced drilling (UBD) with natural gas as opposed to underbalanced drilling with nitrogen. The opportunity for generating carbon offsets with this methodology arises mainly from direct and indirect greenhouse gas emission reductions through the recovery of formation or produced gas during UBD that would otherwise have been flared.