1979–1989: Founding and Opening China’s Offshore Sector
1979: China begins establishing a national offshore oil development strategy as the economy opens to foreign cooperation
1982: CNOOC is founded as the state entity responsible for offshore petroleum exploration and development
1982: CNOOC becomes the primary counterparty for Production Sharing Contracts (PSCs) with international oil companies in offshore China
Mid–late 1980s: Early offshore exploration advances in Bohai Bay, the South China Sea, and the East China Sea, supported by foreign technology and capital via PSCs
Strategic opening + institutional creation + PSC-based collaboration launch China’s offshore exploration.
1990–1999: Commercialization and Capacity-Building
Early 1990s: CNOOC expands offshore field appraisal and development; engineering, drilling, and supply-chain systems mature
Mid–late 1990s: Development shifts toward standardized project execution and production operations, preparing for corporatization and capital-market access
2000–2005: Corporate Restructuring, Listing, and First Major Overseas Push
1999–2001: Operating assets reorganized into a more commercial structure to support external financing and international standards
2001: CNOOC Limited established and listed (Hong Kong and New York) to fund growth and improve governance and transparency
2002–2005: Domestic offshore development intensifies (notably Bohai) while overseas upstream participation scales via acquisitions and partnerships
2005: Unsuccessful bid for Unocal signals ambition to become a major global upstream player
2006–2012: Deepwater Drive and Global Portfolio Expansion
2006–2009: Offshore China growth accelerates; project management and engineering strengthen for larger, more complex developments
2010–2012: Deepwater exploration and development capabilities expand, particularly in the South China Sea
2012: Acquisition of Nexen expands international reserves/production (Canada, UK North Sea, Gulf of Mexico)
2013–2019: Integration, Mixed-Ownership Signals, and Gas/LNG Emphasis
2013–2015: Post-Nexen integration; balances domestic offshore growth with overseas assets and risk management
2013–2015: Natural gas becomes more prominent, aligned with demand growth and air-quality priorities
Mid–late 2010s: Deepens LNG and gas value-chain participation; strengthens production bases (Bohai and southern offshore areas)
Mid–late 2010s: Focus expands to cost control, safety, and efficiency amid oil-price fluctuations
2020–2022: Resilience, Domestic Upstream Priority, and Capital-Market Shift
2020: Maintains production through pandemic volatility while advancing key offshore China projects
2021: Reinforces domestic exploration and development as energy security becomes a priority
2022: CNOOC Limited delists from the NYSE amid cross-border listing and compliance changes
2022: A-shares listing in Shanghai expands mainland capital access and broadens domestic investor base
2023–Present: From Offshore Champion to “Global Energy Group” Positioning
2023–2024: Offshore China production growth continues via large-scale projects and enhanced recovery in mature fields
2023–2024: Portfolio management continues across international assets; strategy emphasizes energy security, efficiency, and selective global participation
2025–Present: Positions as an integrated globally engaged energy company—core offshore upstream leadership, gas prioritization, and operational decarbonization measures (efficiency upgrades, methane management, lower-carbon project practices)