ExxonMobil Development Africa B.V. has acquired a 25 percent indirect interest in Mozambique’s gas-rich Area 4 block from Eni and assume responsibility for midstream operations.

Mozambique made one of the world's biggest gas finds in a decade in 2010 but negotiations with operators Eni and U.S. firm Anadarko have dragged on for years due to disputes over terms and concerns about falling energy prices.

The World Bank is downgrading its 2016 global growth forecast to 2.4 percent from the 2.9 percent pace projected in January. The move is due to sluggish growth in advanced economies, stubbornly low commodity prices, weak global trade, and diminishing capital flows.

“South Africa’s oil refineries are not ready and will not be ready to produce Euro 4 standard fuel, let alone Euro 6, which the world is moving to by 2017 or 2020 in preparation for the introduction of more fuel-efficient vehicles,” he said in an opinion piece in Johannesburg-based Business Report newspaper Tuesday. “Our present crude-oil stocks are suitable for producing products of lower specifications, which means we need to stockpile higher-quality grades of crude oil.”