The development stages:In production - under development/2013-01.The Burgos asset has 142 gas producing fields located throughout Mexico's northeast. Natural gas production began in 1945 and the asset covers an area of 109,605 square kilometers. The Burgos asset covers both the Burgos and Sabinas basins, two important shale gas-bearing areas. Holding 53.8Tf3 of technically recoverable resources.