Argentina's YPF says Vaca Muerta shale output rose to 40,000 bpd
February 26, 2015 at 16:53 PM EST
BUENOS AIRES, Feb 26 (Reuters) - Energy output at Argentina's vast but barely tapped shale oil and gas field "Vaca Muerta" has risen to 40,000 barrels of oil equivalent per day, said YPF Chief Executive Officer Miguel Galuccio on Thursday.