As global energy markets grow increasingly volatile, China is looking deeper underground to insulate its economic engine.
The ability to unlock massive, ultra-deep subterranean reserves is no longer just an engineering triumph, but has become a vital geopolitical shield, allowing the world's second-largest economy to steadily replace vulnerable foreign gas imports with a homegrown "ballast stone" of energy security.
At the heart of this strategic shift is the newly certified Ziyang Dongfeng shale gas field in the Sichuan Basin, China's first ultra-deep shale gas field of this scale.
Operated by State-owned energy giant China Petroleum and Chemical Corp, or Sinopec, the field passed the Ministry of Natural Resources' review on May 13 with proven geological reserves totaling 235.69 billion cubic meters.
Tapping into this immense energy reservoir pushed Chinese exploration into uncharted territory. The gas lies trapped within the Earth's oldest commercially discovered shale layer, formed over 540 million years ago. To extract these resources, engineers had to drill to punishing depths ranging from 4,500 to 5,200 meters, said Sinopec.
