Tags Viet Nam-Russia oil and gas exploration joint venture Vietsovpetro earns US$1.89 billion in revenue, exceeding goal Friday, Dec 15, 2017 The Viet Nam-Russia oil and gas exploration joint venture (Vietsovpetro), on Thursday, announced that it has earned more than US$1.89 billion, exceeding its target of $1.88 billion set for 2017.