When the state-owned oil and gas giant with the deepest understanding of the "sea" enters the offshore wind sector, this is not a mere exploratory venture but a strategic return leveraging decades of marine engineering expertise.
Recently, Cnooc Limited established two new energy companies in Shanwei, Guangdong, with a combined registered capital of 11 billion yuan. Notably, Cnooc had already set up a wind power company in Shanwei by the end of 2025. Coinciding with this, Cnooc signed a cooperation agreement with Mingyang Smart Energy for the Hongwan Phase IV project. This project boasts a total capacity of 500 megawatts, plans to utilize 28 ultra-large 18 MW turbines, and involves a total investment of approximately 5.85 billion yuan.
Many might initially assume that the offshore oil and gas giant is being compelled to venture into new energy. However, following this line of thinking would likely lead to a misinterpretation of the broader strategy. The truly noteworthy aspect is this: when the enterprise most proficient in maritime operations begins systematically investing in offshore wind power, the leading player in offshore energy might be changing.
What does 500 MW represent? It is equivalent to the capacity of a large thermal power plant, capable of meeting the annual electricity demand of a city with several hundred thousand residents. The 18 MW unit capacity is among the largest commercially available turbine series globally. This reveals a cognitive dissonance: while most perceive Cnooc's move into wind power as "crossing sectors," the reality might be the opposite—it is a "return to its main arena."
Why is this the case? We must reason from first principles. What is the essence of offshore wind power? To understand Cnooc's strategy, one must first ask a fundamental question. Many would initially say "power generation," but this is only half correct. A more precise answer is: constructing an industrial system on the sea that can operate continuously for 20-30 years. The key terms are "offshore," "industrial system," and "20-30 years." This implies that the core competency for offshore wind is not "understanding electricity," but "understanding offshore engineering." It is akin to running a restaurant: while good food is the baseline, what truly determines success is supply chain management, location selection, and cost control. Similarly, for offshore wind, power generation technology is fundamental, but the decisive factors are: Can the platform withstand a Category 17 typhoon (wind speeds exceeding 60 m/s)? Can subsea cables and mooring systems be laid at 120-meter depths? Can all-weather operations and maintenance be conducted 100 kilometers offshore? Can a platform operate for 20-30 years without major failures? These questions all point to the same core capability: the offshore engineering system, which is precisely Cnooc's area of expertise.
Now, consider the second layer of logic. If the essence of offshore wind is "offshore engineering," why have power sector state-owned enterprises, not Cnooc, dominated its development over the past decade? The answer is simple: the previous rules of the game did not require such advanced offshore engineering capabilities. Traditional offshore wind development was concentrated in shallow waters within 50 meters of depth. In this realm, the process involved obtaining permits, building wind farms, connecting to the grid, and competing on electricity prices. Here, power companies held advantages: they understood the grid, pricing, and policies, and could transfer experience from onshore wind. Offshore engineering was necessary but not yet decisive. However, as offshore wind moves into deep waters—depths exceeding 50 meters and distances over 100 kilometers offshore—the rules are completely rewritten. Data speaks volumes: most global premium resources are located beyond 50-meter depths; China's quality resources within 50 meters are becoming saturated, with limited new space; deep-water wind resources beyond 50 meters exceed 1 billion kilowatts, holding immense development potential. This means the future battleground is in deep waters. There, the game changes entirely. For instance, in a 10-billion-yuan deep-water wind project, offshore engineering alone can cost 6 billion yuan. Engineering costs soar from 30% in nearshore projects to over 60%. Whoever masters the offshore engineering system controls costs, and cost control determines survival in this market. At this point, the advantages of power companies diminish, while Cnooc's decades of "marine engineering" experience begin to demonstrate a "dimensional advantage."
Cnooc has been operating oil and gas platforms for over 40 years. This means it has accumulated experience in constructing over 300 offshore platforms and floating facilities, with operations reaching depths of 1,500 meters (as with the "Deep Sea No. 1" ultra-deepwater gas field). It has established a complete engineering system encompassing platform construction, subsea pipelines, heavy lifting, and long-term operations and maintenance. This system, originally built for oil and gas extraction, can now be directly transferred to deep-water wind power. For example, in 2023, Cnooc's "Haiyou Guanlan" floating wind platform (7.25 MW) commenced operations off the coast of Wenchang, Hainan. Its parameters—120-meter depth, 136 kilometers offshore, coupled with seawater hydrogen production—represent the most challenging aspects of deep-water wind power. For Cnooc, these are "standard operations," as its oil and gas platforms in the South China Sea routinely operate at depths of hundreds to thousands of meters, farther offshore, and must withstand Category 17 typhoons. This is akin to an engineering team accustomed to building roads on Mount Everest applying its skills to constructing highways on plains. The technical and environmental complexities are not comparable. After over 40 years of operating in extreme conditions—1,500-meter depths, Category 17 typhoons, hundreds of kilometers offshore—tackling 120-meter depth wind projects is a natural fit. This is the "dimensional advantage."
To assess a company's strategy, one should not just listen to its statements but examine its organizational design, as structure reveals true intent. Cnooc's recent organizational setup for this venture is three-tiered: First, a Regional Headquarters (10 billion yuan registered capital)—Cnooc (Shanwei) New Energy Co., Ltd., responsible for the entire power chain from generation to transmission, distribution, and sales. This is a "platform" company aiming for control over regional offshore wind. Second, a Technology R&D Center (1 billion yuan registered capital)—Cnooc (Lufeng) Offshore Wind Power Co., Ltd., focused on technology and system R&D. This is a "capability" company building a technological moat. Third, a Project Execution Entity (SPV joint venture)—a joint venture with Mingyang Smart Energy (36.5%) and Shanwei Investment Holdings (12.5%), with Cnooc holding the remaining 51%. This is a "project" company ensuring execution efficiency. This three-tier structure signals that Cnooc is not merely "testing the waters" but building organizational infrastructure for long-term, replicable, and scalable offshore wind development. This "infrastructure" can be quickly replicated in other sea areas—the platform company coordinates resources, the tech company builds capabilities, and the project company ensures agile execution. This is not an ad-hoc project but the creation of a self-reinforcing system. Crucially, this design mirrors the mature model Cnooc has used in oil and gas development for over 40 years, now transferred to wind power.
Now, consider the third layer: Why is Cnooc partnering with Mingyang Smart Energy to establish wind power companies? Last year, the two jointly formed Cnooc (Dongfang) Energy Co., Ltd., and this year, they set up Cnooc (Shanwei) Offshore Wind Power Co., Ltd. Superficially, this is a common "turbine supplier + SOE" partnership. However, it is essentially a "technology roadmap alliance." Offshore wind technology is rapidly evolving: unit capacity is increasing from 5 MW and 10 MW to 18 MW, potentially 26 MW in the future; foundation types are shifting from fixed-bottom to floating; typhoon resistance is advancing from Category 15 to 17 and beyond. This technological uncertainty carries risk, as betting on the wrong direction could lead to billions in losses. Cnooc's strategy is to ally with wind giant Mingyang to lock in the technology roadmap early. The Hongwan Phase IV project will use Mingyang's latest 18 MW turbines, among the world's largest. This is not a simple buyer-supplier relationship but a deep division of labor: Mingyang provides ultra-large turbines, floating wind technology, and customized typhoon-resistant designs; Cnooc provides maritime resources, engineering execution capability, long-term operational experience, and real-world application scenarios. This binding offers three benefits: First, it reduces technological risk. Mingyang can iterate and optimize based on Cnooc's actual scenarios, while Cnooc secures advanced equipment and avoids missteps in technology direction. Second, it helps seize standard-setting authority. If the 18 MW turbines prove successful on Cnooc's platforms and lead to replicable engineering solutions, they could become industry standards. Whoever sets the standards gains future market influence. Third, it builds an ecosystem barrier. Once the combination of "Cnooc's maritime resources + Mingyang's turbine technology" scales, new entrants must overcome both offshore engineering capabilities and turbine technology hurdles. This creates an ecosystem-level moat. This ecosystem can self-reinforce, much like Apple's iOS ecosystem: once users are accustomed to the ecosystem, it becomes harder to leave. Cnooc and Mingyang's alliance is building an "iOS ecosystem" for offshore wind, which, once established, becomes increasingly difficult for competitors to disrupt.
However, Cnooc's ambitions evidently extend beyond "excelling at wind power." Looking ahead 10 years, a larger chessboard emerges: the integrated offshore energy system. When different elements combine, the system can exhibit new functionalities not present in individual parts—this is the "emergent effect" of complex systems. For instance, hydrogen and oxygen alone are flammable and comburent gases, but combined in a 2:1 ratio, they form water—a completely different substance that extinguishes fires. Cnooc is building such a system: Offshore wind provides green power; Offshore oil and gas platforms offer operational scenarios and pipeline networks; Offshore hydrogen production utilizes fluctuating power to produce green hydrogen; CCUS technology captures and stores CO2 for carbon neutrality; Offshore energy storage balances power fluctuations. Combined, these elements give rise to a new business model: the integrated offshore energy island. This is not theoretical but is becoming reality. Consider these scenarios: Scenario 1: Powering oil and gas platforms. A platform using traditional diesel generators consumes about 5,000 tons of diesel annually, costing over 30 million yuan and emitting roughly 16,000 tons of CO2. Switching to wind power eliminates emissions and saves costs. Cnooc owns over 300 platforms and floating facilities; converting them to wind power could yield significant savings and emission reductions. Scenario 2: Hydrogen production and transport. Offshore wind's flaw is intermittency—excess power when windy, shortages when calm. Using surplus electricity for seawater electrolysis to produce hydrogen converts "fluctuating power" into "stable hydrogen." Crucially, Cnooc has existing offshore gas pipelines. Green hydrogen can be transported ashore via these, avoiding new infrastructure costs. Scenario 3: CCUS closed loop. In Huizhou, Guangdong, Cnooc launched China's first 10-million-ton CCUS cluster project, transporting CO2 from Daya Bay enterprises to the Pearl River Mouth Basin for injection and permanent storage in saline aquifers 1,200-1,600 meters deep. Depleted oil and gas fields, with their stable geological structures, are ideal storage sites. Combined, these scenarios form a business闭环: Wind generates power → Powers oil and gas platforms (saving costs) → Surplus power produces hydrogen (new revenue) → Hydrogen is transported via existing pipelines (zero-cost infrastructure) → CO2 is stored in depleted fields (adding value) or used for methanol production. Why can't traditional power companies create this system? They lack the "anchor" of oil and gas platforms, preventing multi-energy integration. Cnooc, however, transforms its 40-year accumulation of "existing assets" into a "strategic advantage" for the new energy era.
So, is this a sector crossover or a return? The answer is clear: It is a return. From first principles, offshore wind's essence is "offshore engineering," not "power generation." Cnooc's core competency, honed over 40 years, is precisely "offshore engineering." It is simply transferring this capability from "extracting oil and gas" to "developing wind power." Thus, Cnooc's move is not a pivot but a "return of capability" to its main arena—the sea, albeit with the product shifting from oil and gas to electricity and hydrogen. This is like a heavyweight boxer moving to a lighter weight class: the rules and opponents change, but the core skills—power, agility, resilience—remain. The value Cnooc creates is not merely in reducing the levelized cost of electricity but in providing dual guarantees for energy security and industrial upgrading. To understand a system, observe its "emergent effects." The integrated offshore energy system Cnooc is building gives rise to a self-reinforcing, evolving industrial ecosystem. Therefore, when news breaks of Cnooc establishing wind power companies, it should not be simplistically interpreted as "an oil and gas SOE dabbling in new energy." What is truly happening is that a giant with over 40 years of marine engineering experience is using a "dimensional advantage" to upgrade offshore energy from "single-resource development" to an "integrated energy system." Once this system proves viable, it will redefine the competitive landscape of China's offshore wind—shifting the focus from securing more permits to integrating wind, gas, electricity, hydrogen, and carbon into an efficient, operational ecosystem. When a sea-savvy player begins systematically restructuring the offshore energy order, China's offshore wind may be entering a genuine "engineering era." This is the signal the industry should take seriously.
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