Flares are necessary to quickly dispose of hydrocarbon gas in emergencies. Flaring gas releases harmful Carbon Dioxide (CO₂) emissions. These emissions are strictly regulated under the EU emissions trading scheme (ETS), which places stringent limits on the amount of CO₂ emissions that oil and gas operators can release year on year.
Operators are required to measure the amount of CO₂ released by flaring within certain accuracies, and ensure the amount released stays within their emission quotas. Ultrasonic flow meters (USM) are commonly installed in flare systems to measure the amount of gas flared. This can then be used to calculate the release of CO₂ emissions. However, flare gas measurement offshore can be extremely challenging. This is mainly due to space and load constraints on platforms that can lead to non-ideal meter installations and unstable flows.
NEL utilise their expert Computational Fluid Dynamics (CFD) service to accurately replicate a model of offshore flare stacks. We can understand the true metering error by analysing a range of operating conditions such as:
- Low-level controlled flaring used to maintain the flare pilot light,
- General plant leakage,
- High-level unplanned emergency flaring
By correcting these errors, significant savings can be made.
With more than 40 years of flow measurement experience, NEL have inspected and tested virtually every type of flow meter there is. In addition, our practical experience of managing and maintaining our National Standard, UKAS accredited flow facility has allowed us to build knowledge of all associated instrumentation such as sensors, values, flow computers, SCADA systems and more.
NEL use this knowledge to help customers ensure they are making the right purchasing decision and the right measurement solution.