Offshore Platform

Deep Sea No. 1 — gas leak, fire and prolonged shutdown

12 May 2026

South China Sea, approximately 150km southeast of Hainan, China

17.3000, 111.5000

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What happened

A gas leak reportedly triggered a major fire at CNOOC's Deep Sea No. 1 platform, China's largest deepwater gas field development in the South China Sea. Trade press reported the resulting shutdown could last up to six months and threatens gas deliveries to Hong Kong and the industrial heartland of Guangdong province, potentially forcing CNOOC to seek emergency spot LNG purchases. CNOOC has not issued a public statement confirming the incident. This record is marked 'reported' pending independent corroboration; the coordinate is an approximation based on the reported distance and bearing from Hainan.

When cited sources give different casualty, damage or spill figures for this event, they’re reported side by side above rather than merged into one number. See how confidence levels work.

Evidence
Reported / attributed
Confidence
Moderate
Infrastructure
Offshore Platform
Current temperature
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Latitude
17.3000°
Longitude
111.5000°

Attribution

Attributed to Unknown — under investigation

CNOOC has not publicly confirmed the incident. Reporting is based on industry trade press (Energy Intelligence) and unverified social-media reports; no wire-service (Reuters/AP/AFP) confirmation was located at time of entry.

Sources

  1. Fire at China's Flagship Deepwater Gas Hub Threatens SuppliesEnergy Intelligence · Incident reporting
  2. Deep Sea No. 1 Gas Outage Puts China's CNOOC in a Tight SpotEnergy Intelligence · Follow-up reporting on the outage duration and CNOOC's silence