Yacheng 13 1 Gas Field

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Summary Information

  • Operator: CNOOC
  • Country: China
  • Location: South China Sea
  • Production start: 1996
  • Partners: CNOOC (51 per cent), and Kuwait Foreign Petroleum Exploration Company (49 per cent)
  • Type: Gas
  • Estimated Reserves: 3-trillion cubic feet of gas
  • Production Volume:


  • The Yacheng field has estimated reserves of more than 3-trillion cubic feet of gas, making it the largest offshore natural gas producing field in China
  • Yacheng 13-4 Gas Field is a satellite
  • The gas is mostly transported to Hong Kong through a 480-mile pipeline, the second longest subsea pipeline in the world.
  • A second pipeline supplys natural gas to local industries on Hainan Island some 60 miles away.


  • HHI: Construction of Wellhead Platform & Pile
  • Saipem:
    • Yacheng RDPP1 - LQ Jacket
    • Gas pipeline installation


  • 1983 - Yacheng 13 1 Gas Field discovered
  • 1996 - Production start up
  • 2004 - BP handed operatorship to its major project partner CNOOC
  • 2012 - Yacheng 13-4 Gas Field Starts Production
  • 2013 - BP sells stake KUFPEC


  • The primary reservoir is the Middle/Late Oligocene Lingshui-3 Member sandstones, which were developed during a major marine transgression in response to the continued opening up of the South China Sea. The thermal subsidence during late syn-rift stage created substantial accommodation space that contributed to the development of overwhelmingly thick succession (over 150 m) of reservoir sandstones with excellent reservoir quality.


  1. Hyundai Heavy Industries Platform References
  2. FoundOcean Subsea References
  3. Saipem Pipeline References
  4. Sequence Stratigraphic Framework and Reservoir Architecture of the Lingshui-3 Member, Yacheng 13-1 Gas Field, South China Sea
  5. ARCO, Chinese Leaders Celebrate Startup of China's Largest Offshore Natural Gas Project
  6. Yacheng 13-4 Gas Field Starts Production Successfully
  7. BP to Sell Yacheng Gas Field in China to KUFPEC
  8. KUFPEC To Acquire BP’s interest in the Yacheng Gas Field offshore China

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