Continuous Methane Measurement: Equivalency Evaluation of Regulator-Approved Alternative Leak Detection and Repair Program in Alberta, Canada

Executive Summary

• The paper evaluates the effectiveness of Continuous Measurement (CM) systems as an alternative to traditional Leak Detection and Repair (LDAR) methods for methane emissions in oil and gas facilities. This was the first comprehensive demonstration combining controlled testing, simulation modeling, and field piloting under a regulatory-approved framework in Alberta, Canada.

• Through controlled release testing, the CM system demonstrated reliable detection (90% probability) of methane leaks at rates of 1 kg/h from distances of 75-100 meters. The simulation modeling using LDAR-Sim showed that the CM program could reduce methane emissions by 91.8% compared to about 50% reduction from conventional OGI (Optical Gas Imaging) methods.

• Field pilot results involving 52 CM devices across 16 facilities showed practical success in quickly detecting both fugitive emissions (like tank thief hatch leaks) and vented emissions (from high-bleed pneumatics). The CM system's ability to detect leaks within days rather than waiting for annual inspections led to faster repairs and significantly improved emissions reduction, with some facilities showing up to 60% reduction in emissions after implementing recommended changes.

This study provides strong evidence that continuous monitoring systems, when properly implemented with appropriate follow-up protocols, can be significantly more effective than traditional periodic inspection methods for methane leak detection and repair.