Key Takeaways ExxonMobil begins production at Yellowtail in the Stabroek Block offshore Guyana.One Guyana FPSO adds 250,000 barrels per day, lifting total capacity past 900,000 barrels.Production start comes four months early, marking a milestone toward 2030 output goals.Exxon Mobil Corporation (XOM) , the U.S.-based oil and gas major, announced the start of production at the Yellowtail development in the prolific Stabroek Block, offshore Guyana. The company mentioned that the fourth floating production sto ...