China has little choice but to look beyond its borders for its energy needs. While it consumed 10.1 million barrels of oil a day last year — one-ninth of the world’s total — the country produced only 4.2 million barrels a day, according to a recent OPEC report. China has had mixed results drilling offshore, and it has been slow to develop what many energy experts believe to be vast shale gas resources on land, though Chinese energy executives express optimism.

“The China market feels that the revolution in shale gas will be coming very soon,” Zhang Mi, chairman and president of Honghua Group, an exporter of drilling rigs, said in an interview while at a Houston energy technology conference this month. He added that 100 shale gas land rigs would be put in operation by the end of the year.

Most energy experts think it will take another five to 10 years, though, before substantial amounts of gas can be produced — and even then the quantities may be small compared to China’s enormous needs. The two main shale gas areas are in the west, far from major energy users in the east, and pipelines are few.

More important, shale gas in China mainly lies significantly deeper underground than in the United States and is in poorly understood, geologically complex formations. The domestic oil industry is already struggling with safety and environmental concerns, and faces a challenge in drilling extremely deep wells in western Chinese terrain with pockets of compressed natural gas and toxic gases.

Image Leaders announcing a Chinese pact with Nigeria, a major oil supplier. Credit... Pius Utomi Ekpei/Agence France-Presse — Getty Images

China’s hunt for natural gas reserves at home has taken it into some of the poorest, most remote mountain valleys of western China, where terraced fields of mustard greens and corn cascade down hillsides from mud-brick farmhouses. While some of the country’s energy giants, like Sinopec, are using modern drilling rigs, smaller Chinese companies are also trying to jump into the industry, although many have minimal experience or technical expertise.