The state energy company in Mexico said it signed on with a partner to help extract natural gas from the Eagle Ford shale reservoir in the country. Petróleos Mexicanos, known also as Pemex, said it signed an exploration and extraction contract with the Mexican subsidiary of Lewis Energy to invest $617 million in developing the Olmos field in the Mexican state of Coahuila. “The purpose is to assess and develop the Eagle Ford field in Mexico,” Pemex stated. Lewis has drilled more the 500 wells in the Texas section of the Eagle Ford shale, setting itself up as the third-largest producer in the state. The Eagle Ford shale is the fourth-largest shale natural gas reservoir in the United States by volume. […]