Owned by Norway’s Petroleum Geo-Services and bearing a Bahamian flag, the seismic-survey vessel was stopped by a Venezuelan Navy ship Saturday morning in Guyanese waters, about 90 miles from a provisional border, Guyana said. PGS and Exxon didn’t give further details of the encounter but said the research ship, which had been acquiring the 3-D seismic data needed for drilling, stopped work and left with its 70 crew members. The Venezuelans didn’t board the ship, said its operators. Ten offshore oil discoveries since 2015 by an Exxon-led consortium, accounting for 5 billion barrels of crude, have turned Guyana, one of South America’s poorest nations, into one of the region’s hottest oil frontiers . But the finds have also resurfaced a simmering, century-old border controversy stemming from Venezuela’s claims of two-thirds of Guyana’s territory. “The Ministry of Foreign Affairs rejects this illegal, aggressive and hostile act,” Guyana Foreign Minister Carl […]