As recently as last year, only four countries in the world were producing commercial volumes of either natural gas from shale formations (shale gas) or crude oil from tight formations (tight oil): the United States and Canada, and more recently, Argentina and China. Beyond these four countries, other countries have started exploring hydrocarbons from shale and other tight resources, but they are still short of reaching commercial production. The 2013 World Shale Gas and Shale Oil Resource Assessment , produced by EIA and Advanced Resources International (ARI), noted large shale deposits in China and Argentina. Exploration and drilling is already underway in these countries. For the last two years, China has drilled more than 200 wells, and Argentina has drilled more than 275 wells. Each country has the potential to significantly increase production of shale gas […]