Nigeria is one of the top seven gas-flaring countries in the World. It is estimated that around 2 million people in the country live less than 4 km away from a flare site .
Most of the focus on the impact of flaring has been on the economic impacts while its likely harm to human health, which can be long-lasting, has largely been ignored
The Nigerian authorities are leading the charge in the control and regulation of flaring gas, looking towards eliminating the need for routine flaring over the next few years.
However, a key component in that challenge is accurate measurement.
Fluenta, the global leader in ultrasonic sensing technology for measurement of flare gas, has completed work on the Dangote Refinery in Nigeria – Africa’s biggest oil refinery – to install 18 ultrasonic flare gas meters on large pipelines around the plant.
The Dangote Refinery stands at the vanguard of Africa’s and Nigeria’s moves towards energy self-sufficiency. The West African nation currently imports refined petroleum products for its own use, even though it is Africa’s biggest oil producer.
Dangote Refinery, the world’s largest single-train refinery, which began operating in May 2023, is capable of refining 650,000 barrels of oil per day — enough to meet Nigeria’s daily fuel supply requirements, with adaily surplus of 38m litres of refined products, already earmarked for export.
Nigeria is positioning itself as a world-leader when it comes to reducing its emissions, and flaring – the controlled burning or combustion of excess or waste gases that cannot be processed or captured for productive use – is a safety and environmental practice employed in the petroleum industry to prevent release of potentially harmful or combustible gases into the atmosphere.
Flare measurement in a refinery is essential, from a regulatory and environmental law compliance perspective, and for accurate emissions monitoring.
Fluenta spent more than four months working with its exclusive Nigerian representative, Daptem Engineering, and the Dangote project team to deliver a workable, accurate and reliable flare measurement solution.
Whilst it’s not unusual to have high levels of customisation associated with such installations, the wide variety and sizes of pipelines, which ranged from 18” to 90” diameters presented a unique engineering challenge. Larger pipelines make it difficult to measure accurately as the acoustic pulse has further travel which could weaken it and lead to less accurate readings. In addition, flared gas expelled through these pipelines is high in CO2, a particularly difficult gas to measure using ultrasonic technology.
The team implemented amultitude of innovative, bespoke solutions, each considered on a case-by-case basis, to ensure accuracy of the system.
Under current Nigerian law, companies refining oil and gas must pay a ‘tax’ for flared gas, to encourage an overall reduction in flaring, underlining the importance of Fluenta’s accurate, trustworthy flare measurement and management.
Radek Kurkowski, Director at Fluenta, says: “Flare gas measurement and control is vital to ensure compliance with environmental regulations and tohelp identifypotential safety hazards. This is especially true at a plant on this never-before-seen scale and with the world’s largest flare pipe.
“Delivering this solution meant some close work with our local partner and the client project team, and we aredelighted with the end result – which will support bringing energy security to Nigeria and the wider Africa region. Our team used a range of state-of-the-art technology, adapted meter software and special pipe gaskets and ball valves to deliver the pipe flare gas measurement solution.
“Fluenta’s work stands as testament to the power of innovation, creative team work and a desire to always meet the client’s needs.We are extremely proud to support the domestic security of energy supply in Nigeria,” Kurkowski enthused.