Cluster wells, one of the firm’s approaches to boost efficiency in gas production, is seen at a PetroChina...
Cluster wells, one of the firm’s approaches to boost efficiency in gas production, is seen at a PetroChina plant in Sulige, Inner Mongolia, May 29, 2013. Remote Sulige, which means "uncooked meat" in Mongolian, is testament to China's success in developing its giant reserves of so-called "tight gas", part of a drive to dramatically boost consumption of cleaner burning natural gas to help replace dirty coal and costly oil imports. Picture taken May 29, 2013. REUTERS/Chen Aizhu (CHINA - Tags: BUSINESS ENERGY)