<h1>Caofeidian 11-1/11-6 Adjustment Oil Project,Bohai,China</h1>
<p>Caofeidian 11-1/11-6 Adjustment Oil Project is an operating offshore oil project in Bohai,China. Known in Chinese as 曹妃甸11-1/11-6调整,it is operated by CNOOC Caofeidian Operating Branch and fully owned by CNOOC Ltd. The conventional oil development lies in the Bohai Bay Basin within block Bohai 04/36. Initial production dates to 2004,while a later comprehensive adjustment project commenced production in 2019. The adjustment project uses new central processing platforms together with existing Caofeidian oilfield facilities,reflecting CNOOC’s mature-field redevelopment strategy in China’s largest offshore crude oil production region.</p>
<h2>Quick Facts</h2>
<table>
<tbody>
<tr>
<th>Item</th>
<th>Details</th>
</tr>
<tr>
<td>Project Name</td>
<td>Caofeidian 11-1/11-6 Adjustment Oil Project</td>
</tr>
<tr>
<td>Country</td>
<td>China</td>
</tr>
<tr>
<td>Subnational Unit</td>
<td>Bohai</td>
</tr>
<tr>
<td>Fuel Type</td>
<td>Oil</td>
</tr>
<tr>
<td>Production Type</td>
<td>Conventional</td>
</tr>
<tr>
<td>Status</td>
<td>Operating</td>
</tr>
<tr>
<td>Status Year</td>
<td>2025</td>
</tr>
<tr>
<td>Operator</td>
<td>CNOOC Caofeidian Operating Branch</td>
</tr>
<tr>
<td>Owner(s)</td>
<td>CNOOC Ltd [100%]</td>
</tr>
<tr>
<td>Parent Company</td>
<td>CNOOC Ltd [100.0%]</td>
</tr>
<tr>
<td>Discovery Year</td>
<td>1999</td>
</tr>
<tr>
<td>Production Start Year</td>
<td>2004</td>
</tr>
<tr>
<td>Onshore/Offshore</td>
<td>Offshore</td>
</tr>
<tr>
<td>Basin</td>
<td>Bohai Bay</td>
</tr>
<tr>
<td>Block(s)</td>
<td>Bohai 04/36</td>
</tr>
</tbody>
</table>
<h2>Location and Operating Area</h2>
<p>The project is located offshore China in the Bohai Sea,within block Bohai 04/36. The basin is the Bohai Bay Basin. Average water depth is 20 to 25 meters,supporting fixed offshore platforms and brownfield tie-ins to existing oilfield infrastructure. CNOOC describes Bohai as the largest crude oil production base in China and one of its most important domestic producing areas.</p>
<h2>Operator and Ownership</h2>
<p>The project is operated by CNOOC Caofeidian Operating Branch. CNOOC Ltd holds a 100% interest,with no external equity partners confirmed at the project level.</p>
<h2>Development History</h2>
<table>
<tbody>
<tr>
<th>Milestone</th>
<th>Year or Date</th>
<th>Details</th>
</tr>
<tr>
<td>Discovery Milestone</td>
<td>1999</td>
<td>Project-level discovery year recorded as 1999.</td>
</tr>
<tr>
<td>Development Milestone</td>
<td>2019</td>
<td>CNOOC announced the Caofeidian 11-1/11-6 Oilfield Comprehensive Adjustment Project had commenced production.</td>
</tr>
<tr>
<td>Production Milestone</td>
<td>2004</td>
<td>Production start year recorded as 2004; the comprehensive adjustment phase commenced production in 2019.</td>
</tr>
<tr>
<td>Recent Status Milestone</td>
<td>2025</td>
<td>Project classified as operating in current data.</td>
</tr>
</tbody>
</table>
<p>The project-level discovery year is 1999,and production start is recorded as 2004. In November 2019,CNOOC announced the start of production from the Caofeidian 11-1/11-6 Oilfield Comprehensive Adjustment Project,a mature-field adjustment development using two newly built central processing platforms and existing Caofeidian facilities.</p>
<h2>Infrastructure and Facilities</h2>
<p>The comprehensive adjustment phase includes two newly built central processing platforms,six existing wellhead platforms,and one existing FPSO within the Caofeidian oilfield system. CNOOC reported that 89 producing wells were planned for the comprehensive adjustment project,with 12 wells producing at the time the adjustment phase commenced in 2019. CNOOC Engineering described construction milestones including jacket installation and module load-out during 2019.</p>
<h2>Production and Reserves</h2>
<p>The project is an operating oil development. Global Energy Monitor records production design capacity of 10.48 million barrels of oil per year for 2021. CNOOC stated in 2019 that the project was expected to reach peak crude oil production of approximately 28,700 barrels per day in 2021. Current production figures specific to the project are limited. Project-specific reserve figures are not clearly available in reviewed sources.</p>
<h2>Recent Developments</h2>
<p>The project remains classified as operating. The most recent public milestone is CNOOC’s November 2019 announcement of the comprehensive adjustment project commencing production. CNOOC Engineering reported construction milestones in 2019 including successful launch of the second newly constructed jacket and load-out of a 10,000-ton module from the COOEC Qingdao Yard. No public source confirms a new final investment decision,major redevelopment,ownership change,shutdown,or decommissioning event after the comprehensive adjustment phase.</p>
<h2>Sources</h2>
<ul>
<li><a href="https://www.gem.wiki/Caofeidian_11-1/11-6_Adjustment_Oil_Project_%28Bohai%2C_China%29" rel="nofollow noopener" target="_blank">Global Energy Monitor,Caofeidian 11-1/11-6 Adjustment Oil Project (Bohai,China)</a></li>
<li><a href="https://www.prnewswire.com/news-releases/cnooc-limited-announces-caofeidian-11-111-6-oilfield-comprehensive-adjustment-project-commences-production-300961758.html" rel="nofollow noopener" target="_blank">CNOOC Limited,Caofeidian 11-1/11-6 Oilfield Comprehensive Adjustment Project Commences Production</a></li>
<li><a href="https://www.offshore-technology.com/projects/caofeidian-oil-field-expansion-project-bohai-bay/" rel="nofollow noopener" target="_blank">Offshore Technology,Caofeidian Oil Field Expansion Project,Bohai Bay,China</a></li>
<li><a href="https://www.nsenergybusiness.com/company-news/cnooc-production-caofeidian-china/" rel="nofollow noopener" target="_blank">NS Energy,CNOOC begins production from Caofeidian 11-1/11-6 oilfield</a></li>
<li><a href="https://www.offshore-energy.biz/cnooc-kicks-off-production-from-oilfield-project-in-bohai-sea/" rel="nofollow noopener" target="_blank">Offshore Energy,CNOOC kicks off production from oilfield project in Bohai Sea</a></li>
<li><a href="https://www.oedigital.com/news/471948-cnooc-starts-bozhong-28-34" rel="nofollow noopener" target="_blank">Offshore Engineer,CNOOC starts Caofeidian 11-1/11-6 production</a></li>
<li><a href="https://www.cnoocengineering.com/english/Media/CompanyNewsTwo/202410/t20241022_97342.html" rel="nofollow noopener" target="_blank">CNOOC Engineering,Second newly constructed jacket of Caofeidian 11-1/11-6 project successfully lifted and launched</a></li>
<li><a href="https://www.cnoocengineering.com/english/Media/CompanyNewsTwo/202410/t20241022_97344.html" rel="nofollow noopener" target="_blank">CNOOC Engineering,10,000-ton module of Caofeidian project loaded out</a></li>
<li><a href="https://www.cnoocltd.com/english/aboutus/keyoperatingareas/" rel="nofollow noopener" target="_blank">CNOOC Limited,Key Operating Areas</a></li>
<li><a href="https://www.reuters.com/business/energy/chinas-cnooc-starts-producing-heavy-crude-bohais-kenli-oilfield-2025-07-22/" rel="nofollow noopener" target="_blank">Reuters,China’s CNOOC starts producing heavy crude at Bohai’s Kenli oilfield</a></li>
<li><a href="https://www.scirp.org/journal/paperinformation?paperid=92324" rel="nofollow noopener" target="_blank">Open Journal of Yangtze Oil and Gas,interlayer prediction study for Caofeidian 11-1 oilfield</a></li>
</ul>
<h2>Related Topics</h2>
<ul>
<li>Caofeidian 11-1/11-6 oilfield</li>
<li>Caofeidian oilfield comprehensive adjustment</li>
<li>CNOOC Bohai oil projects</li>
<li>Bohai Bay Basin</li>
<li>Bohai 04/36 block</li>
<li>Shallow-water offshore oil development</li>
<li>Mature-field redevelopment</li>
<li>Offshore central processing platforms</li>
<li>FPSO-supported field development</li>
<li>Offshore brownfield integration</li>
<li>Produced-water management in mature fields</li>
<li>China offshore crude oil production</li>
</ul>

IEPTC reference profile for Caofeidian 11 - 1/11 - 6 Adjustment Oil Project,Bohai in China,covering asset type,location,development status,and upstream industry context.

Caofeidian 11 - 1/11 - 6 Adjustment Oil Project,Bohai,China

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Caofeidian 11 - 1/11 - 6 Adjustment Oil Project,Bohai,China

Caofeidian 11 - 1/11 - 6 Adjustment Oil Project,Bohai,China

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