Report Highlights

China Offshore Decommissioning Market: Market Overview

China's offshore decommissioning market is entering a structural inflection point driven by the simultaneous ageing of a large installed base and the tightening of environmental liability rules. The country operates more than 200 offshore platforms, the majority installed during the 1980s and 1990s across the Bohai Sea, South China Sea, and East China Sea. As these assets exceed their originally licensed operational lifetimes, CNOOC—the dominant state operator—faces a growing mandatory decommissioning pipeline that the existing contractor base, led by COOEC and COSL, is not currently scaled to absorb. Market revenues were valued at USD 1.82 billion in 2024 and are forecast to reach USD 3.47 billion by 2032.

Government policy has been the decisive force shaping the market's current structure. China's offshore energy regulatory framework has historically prioritised production over asset retirement, leaving decommissioning obligations underfunded and technically underdeveloped compared to mature markets in the North Sea or Gulf of Mexico. The private sector's role is structurally constrained: CNOOC retains operational control as the licensed operator under the Mineral Resources Law, while COOEC and COSL function as captive engineering and marine contractors. Foreign participation is permitted only through joint venture structures approved by the Ministry of Natural Resources, limiting competitive pressure and suppressing innovation in removal methodology and waste stream processing.

Policy-Driven Growth in China's Offshore Decommissioning Sector

Three specific policy mechanisms are translating directly into decommissioning market demand. First, the Offshore Oil Safety Regulations (海洋石油安全生产规定), administered by the National Energy Administration (NEA), require operators to submit formal decommissioning plans for installations operating beyond their approved design life. Amendments introduced in 2021 set binding submission deadlines and empowered the NEA to impose operational suspension orders on non-compliant platforms, directly accelerating CNOOC's decommissioning scheduling from a discretionary to a mandatory activity. Second, the Marine Environment Protection Law (海洋环境保护法), revised in 2023 and effective from January 2024, strengthened platform removal obligations by requiring complete structural removal to seabed level for installations in water depths under 200 metres, closing the previous partial-removal loophole used extensively in the Bohai Sea.

Third, China's 14th Five-Year Plan for Offshore Oil and Gas Development (2021–2025) introduced a financial assurance mechanism requiring CNOOC and its joint venture partners to establish dedicated decommissioning reserve funds sized to estimated asset retirement obligation (ARO) values, modelled on the United Kingdom's Oil and Gas Authority decommissioning security agreement framework. The Ministry of Finance issued supplementary guidance in 2022 specifying that ARO provisions must be audited annually and reported in standardised formats to the State-owned Assets Supervision and Administration Commission (SASAC). Each of these mechanisms creates enforceable spending commitments that translate directly into contracted decommissioning service volumes across well abandonment, platform removal, and seabed remediation categories.

Regulatory Barriers and Compliance Costs

Market entry for non-state actors is governed by a layered licensing regime that imposes significant cost and timeline penalties. The Ministry of Natural Resources (MNR) administers the Offshore Oil Exploration and Development Environmental Impact Assessment (EIA) requirements under the Environmental Impact Assessment Law, which mandates a project-specific EIA for every decommissioning programme before any in-water operations can commence. EIA approval timelines in practice range from 14 to 22 months for complex multi-platform programmes, compared to an average of 9 months in Norway under the Petroleum Safety Authority framework. Foreign-owned entities face an additional approval layer under the Foreign Investment Law (2019), requiring a CNOOC joint venture partner endorsement before MNR will accept an EIA application, effectively reserving project lead roles for domestically registered entities.

Local content requirements compound the compliance burden. CNOOC's standard engineering, procurement, and construction (EPC) contracts for decommissioning programmes require a minimum 70% Chinese-sourced labour and equipment content, administered through contract audit by the China Classification Society (CCS). Imported specialist equipment—including real-time well intervention tools and advanced remotely operated vehicles (ROVs) not manufactured domestically—must obtain an import permit waiver from the MNR's offshore division, a process that typically adds 60 to 90 days to project mobilisation. CCS certification for marine vessels engaged in decommissioning operations is mandatory and requires re-certification every five years, with vessel compliance audits generating costs estimated at USD 800,000 to USD 1.4 million per vessel cycle for heavy-lift crane barges.

Policy-Created Opportunities in China's Offshore Decommissioning Market

The 2023 revision of the Marine Environment Protection Law has created a specific procurement opportunity in seabed remediation and post-removal environmental monitoring services. The law now requires operators to conduct biological survey assessments at decommissioning sites for a minimum of three years post-removal, a requirement previously absent from Chinese regulatory practice. CNOOC has no established internal capability in long-term ecological monitoring, creating a directly addressable contract category for environmental services firms able to meet the MNR's marine survey licensing standards. Estimated annual spend on compliance monitoring under this provision is projected to reach USD 180 million by 2027 as Bohai Sea removal programmes complete their first operational phases.

A second opportunity arises from the State Council's dual-carbon policy targets (碳达峰碳中和), which are accelerating early decommissioning of high-emission Bohai Sea assets and creating parallel demand for material recycling and steel recovery services. SASAC issued guidance in 2023 directing CNOOC to prioritise circular economy outcomes in asset retirement, including maximising recoverable steel tonnage from removed topsides. This policy direction opens a procurement channel for specialist cutting, sorting, and steel certification services currently not available at scale within COOEC's existing service portfolio. The Tianjin Free Trade Zone, which hosts several approved scrap metal processing facilities, is positioned as the primary material recovery hub, and regulatory approvals for new processing capacity under the Solid Waste Pollution Prevention Law are being fast-tracked by the Tianjin Municipal Government.

Market at a Glance

Leading Market Participants

• CNOOC Limited
• China Oilfield Services Limited (COSL)
• Offshore Oil Engineering Co. Ltd. (COOEC)
• Sinopec Oilfield Service Corporation
• Salvage Bureau of the Ministry of Transport
• China Merchants Heavy Industry
• ZPMC (Shanghai Zhenhua Heavy Industries)
• Heerema Marine Contractors (China JV)
• TechnipFMC (China operations)
• Halliburton China

Regulatory and Policy Environment

The primary legislative instrument governing offshore decommissioning in China is the Marine Environment Protection Law (海洋环境保护法), first enacted in 1982 and comprehensively revised in October 2023, with effect from January 2024. Regulatory administration is split between the Ministry of Natural Resources, which holds authority over offshore installation permits and EIA approvals, and the National Energy Administration, which oversees operational safety compliance and decommissioning plan submissions. The 2024 revision introduced Article 59, which explicitly prohibits partial platform abandonment in waters shallower than 200 metres and establishes administrative penalties of up to RMB 2 million per violation, with criminal liability provisions for repeat non-compliance. Operators must now submit decommissioning programmes at least 36 months before projected cessation of production, compared to the prior 12-month requirement. China's framework remains less prescriptive than the United Kingdom's OPRED decommissioning guidance, particularly on cost-sharing obligations for joint venture decommissioning liabilities, but the 2024 revision substantially closes the compliance gap relative to regional peers including Malaysia and Vietnam.

Upcoming regulatory changes expected before 2027 include draft standards from the Standardisation Administration of China (SAC) covering well plugging and abandonment technical specifications, currently in consultation and anticipated to be finalised by mid-2026. These standards will for the first time create a nationally uniform technical benchmark for P&A operations, replacing the patchwork of CNOOC internal standards currently applied inconsistently across Bohai and South China Sea operations. The China Classification Society is simultaneously revising its marine operations code for heavy-lift and derrick vessels engaged in platform removal, with updated certification criteria expected in 2026. Taken together, these regulatory developments are materially raising technical barriers to entry while simultaneously creating a defined compliance pathway that reduces approval uncertainty for operators prepared to invest in standards-compliant equipment and procedures.

Long-Term Policy Outlook for China's Offshore Decommissioning Market

By 2032, China's regulatory framework for offshore decommissioning is expected to converge further with international best practice, driven by CNOOC's increasing exposure to joint venture obligations with international oil companies operating under home-country decommissioning standards in the South China Sea. The Ministry of Natural Resources is expected to introduce a financial assurance registry by 2028, requiring all offshore licence holders to deposit decommissioning surety bonds calculated against independently audited ARO estimates. This mechanism, modelled on Australia's Offshore Petroleum and Greenhouse Gas Storage Act provisions, will require operators to pre-fund a significant portion of projected decommissioning costs, reducing budget discretion and locking in long-term contractor revenue streams regardless of commodity price cycles.

The dual-carbon policy framework will continue to exert structural pressure on older Bohai Sea assets throughout the forecast period, with CNOOC's internal decarbonisation roadmap—disclosed in its 2023 sustainability report—targeting the retirement of its highest-emission producing platforms by 2030. This timeline implies a sustained acceleration of decommissioning programme initiations from 2026 through 2029, creating peak demand conditions for heavy-lift marine assets and well intervention services that current domestic contractor capacity cannot satisfy without significant capital investment. Foreign contractors with proven North Sea or Gulf of Mexico decommissioning track records will find the post-2026 regulatory environment more navigable as SAC technical standards provide objective qualification criteria independent of the existing CNOOC captive contracting preference structure.

Market Segmentation

By Service Type

• Well Plugging and Abandonment
• Platform and Topsides Removal
• Pipeline and Subsea Infrastructure Decommissioning
• Seabed Remediation and Environmental Monitoring
• Waste Management and Material Recovery
• Project Management and Engineering

By Water Depth

• Shallow Water (0–200 metres)
• Deepwater (200–1500 metres)
• Ultra-Deepwater (above 1500 metres)

By End User

• National Oil Companies
• International Oil Company Joint Ventures
• Independent Operators

By Geography

• Bohai Sea
• South China Sea
• East China Sea

Frequently Asked Questions

Q1. Which Chinese government agency has primary authority over offshore decommissioning approvals? ▼

The Ministry of Natural Resources holds primary authority over offshore installation decommissioning permits and Environmental Impact Assessment approvals. The National Energy Administration administers operational safety compliance and reviews mandatory decommissioning plan submissions under the Offshore Oil Safety Regulations.

Q2. What does the 2024 revision of China's Marine Environment Protection Law require from offshore operators? ▼

The 2024 revision requires complete structural removal to seabed level for all installations in waters shallower than 200 metres, eliminating the previous partial-removal option. Operators must submit decommissioning programmes 36 months before projected cessation of production, up from the prior 12-month requirement.

Q3. Are foreign decommissioning contractors permitted to operate independently in Chinese offshore waters? ▼

Foreign-owned contractors cannot hold a lead project role without a CNOOC joint venture partner endorsement, as required under the Foreign Investment Law (2019) and the MNR's EIA application procedures. All operations must additionally comply with China Classification Society vessel certification requirements and 70% local content rules.

Q4. What financial assurance mechanisms currently apply to offshore decommissioning liabilities in China? ▼

The 14th Five-Year Plan for Offshore Oil and Gas Development requires operators to establish dedicated decommissioning reserve funds with values based on audited Asset Retirement Obligation estimates. The Ministry of Finance's 2022 supplementary guidance mandates annual ARO audits reported to SASAC, though a formal surety bond registry is not yet in force.

Q5. How do China's decommissioning regulations compare to those of regional peers such as Malaysia and Vietnam? ▼

China's 2024 Marine Environment Protection Law revision places its framework ahead of Vietnam's Petroleum Law and Malaysia's Petroleum Development Act in terms of structural removal obligations and enforcement penalties. However, China still lacks Malaysia's established decommissioning cost-sharing framework for joint venture licence holders, an area expected to be addressed by 2028 MNR reforms.