Argentina’s YPF has drilled the longest horizontal well to date in the oil window of Vaca Muerta, where the state-backed energy company is focusing its investment for oil and natural gas production growth. The well was drilled with a lateral of 3,890 meters (12,762 feet) in the shale play, a person close to the company said Monday. The well is on Bandurria Sur, which YPF is developing in a joint venture with US-based Schlumberger, the source said on the condition of not being named. The company plans next to drill an even longer well — most of the laterals are being drilled to 2,500 meters in the play — in Loma Campana, a development with Chevron, the source added. […]