Featured Gas OilNigeria’s crude oil reserves slide to 36.97 billion barrelsBy Shile GIWAJune 20, 2019June 20, 2019 by By Shile GIWAJune 20, 2019June 20, 20190610 The nation’s crude oil reserves dropped by 481 million barrels to 36.972 billion barrels in 2018, according to a new report by the Organisation of