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Image courtesy of BP/Flickr.

BP said on Tuesday that the Rumaila oilfield in Iraq has now produced three billion barrels of oil.

The field, operated by the Rumaila Operating Organization (ROO), began production in Janurary 2010.

The ROO is composed of BP, PetroChina and the South Oil Company of Iraq.

Oil production at Rumaila is now at its highest rate in 27 years, producing over 1.45 million barrels per day, up from 1 million bpd in 2009.

During the past six years, the oil produced from Rumaila has provided the Iraqi state with an estimated $200 billion dollars in revenue.

BP said the production spike was achieved “despite challenging geological conditions and aging infrastructure and equipment within 40-year-old field.”

Under ROO’s management, the number of producing wells at Rumaila has grown by about 50 percent, with more than 240 new wells drilled.

There is also ongoing well workover program at Rumaila designed to counter the mature field’s natural rate of decline.

BP said that new technologies such as real-time well logs, advanced core sample analysis and 3D subsurface maps have also boosted well performance, drilling accuracy and efficiency at the field.

BP said that, along with the field’s active drilling program, output in areas where reservoir pressure had dipped has been boosted after “one of the world’s largest water injection projects” was completed.

Water injection at Rumaila increased from 60,000 to 900,000 bpd from March 2013 tpo October 2016 following renovation of the Qarmat Ali water treatment plant, five pumping stations and associated pipelines.

The refurbishment of other facilities has also continued across the project.

Rumaila’s degassing stations can now treat around 1.8 million bpd of oil and produced water, volumes of fluids not seen at the field since 1979.

“Investment in new oil, gas and water separation units, dehydrators and desalters, and produced water disposal units are proving vital in helping to sustain facilities, many of which date back to the 1970s,” BP said.

BP added that the joint venture has also “significantly” reduced accidents at the field and have provided “a world-class emergency response in the event of any safety-related incidents.”

“Achieving 3 billion barrels of oil in less than seven years is a fantastic achievement, especially when you consider the challenges the oil and gas industry has faced globally during the past two years,” BP’s Chief Executive of Upstream Bernard Looney said.