According to China Hainan Oil, a third deep large-scale gas field, Treasure-Island 21-1, was discovered, with proven reserves of over 50 billion m3. It is located in the southeastern waters of Hainan Island, with a well drilling depth of over 5,000 m, and with extremely complex marine geological conditions. In tests, the daily natural gas production was 587,000 cubic meters. All three basins there have combined proven natural gas reserves of 1 trillion cubic meters. Through the completed “Cliff City-Hong Kong” offshore gas main pipeline, the largest of its kind in Asia, high-quality clean energy from the seabed can in future be directly supplied to nine cities of Guangzhou Province plus Hong Kong and Macau.
Another large deep sea gas field with proven reserves exceeding 50 billion m3 off Hainan