GRTgaz aims to take a leading role in the development of innovative and efficient methods for measuring methane emissions. The company strives to continuously improve its emissions-monitoring management in order to provide accurate and reliable reporting to national authorities, organisations such as the Oil & Gas Methane Partnership (OGMP), and the general public. GRTgaz also aims to be at the forefront of the industry in monitoring and reporting on methane emissions.
To achieve this, GRTgaz has partnered with Sia Partners, an official partner, to drive its Methane Emission Reduction Strategy. As part of the OGMP 2.0, GRTgaz has been rated as meeting the Gold Standard in 2021 and 2022, recognising its commitment to reducing methane emissions and its notable improvements in data reliability.
In collaboration with Bureau Veritas and Aeromon, GRTgaz has conducted pilot projects to measure methane emissions at its sites. Bureau Veritas performed source-level measurements using advanced technologies such as flame ionisation detectors and optical gas imaging cameras. Aeromon, on the other hand, conducted site-level measurements using their sensors, which were mounted on handheld devices and drones.
The data collected from both source-level and site-level measurements was analysed by Aeromon, ensuring accurate quantification of emissions. Reconciliation, the final step in the OGMP 2.0 Level 5 monitoring, was carried out by GRTgaz with support from Aeromon and Bureau Veritas. This process involved comparing the Level 4 source-level inventories with the site-level measurements to generate Level 5 asset-emission estimates, improving the accuracy and confidence in the reported emissions.
The challenges in reconciliation include understanding the different technologies used, the uncertainty levels of each method, and ensuring proper location of detected leaks on the asset’s site map. GRTgaz, Aeromon, and Bureau Veritas have collaborated closely to overcome these challenges and achieve accurate reconciliations.
Another important factor in site-level measurements is risk assessment, particularly when using drones. GRTgaz, Aeromon, and Bureau Veritas have conducted systematic risk assessments and defined operational rules to ensure safe working conditions during drone measurements. Weather conditions also play a significant role, as drone measurements are affected by wind, rain, and snow.
The collaboration with Aeromon has provided GRTgaz and Bureau Veritas with flexibility in sensor installation. Multiple sensors can be installed on one module, allowing for simultaneous measurements of various compounds such as CO2, CO, ammonia, methane, and VOCs. This flexibility and comprehensive coverage of compounds have been key factors in selecting Aeromon as a partner.
GRTgaz plans to conduct more site-level measurement projects in the future, aiming to further improve the quality of reconciliations. With the forthcoming European methane regulation, site-level emissions monitoring and reconciliation may become mandatory for major industrial players in EU countries.
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