Abu Dhabi’s XRG, the international investment arm of the Abu Dhabi National Oil Company (ADNOC), and Italy’s Eni S.p.A. (NYSE:E) have officially signed agreements to acquire minority stakes in three upstream gas blocks linked to the Argentina LNG export project. The transaction involves the Meseta Buena Esperanza, Aguada Villanueva and Las Tacanas unconventional gas blocks located in Argentina’s prolific Vaca Muerta shale basin. Under the newly signed Sale and Purchase Agreements (SPAs), XRG and Eni will each own a 32% stake,…