CCEC is a non–operated joint venture partner with CNOOC in three fields in Bohai Bay: the QHD32–6 field, where CCEC holds 24.5 percent working interest; and the Bozhong 25–1 and Bozhong 19–4 fields, where CCEC's working interest is 16.2 percent. CNOOC is the operator for all three fields and holds the rest of the working interest.
The QHD32–6 field was the very first offshore project in which a Chinese company was the operator with a foreign company being the non–operated joint venture partner. The first phase of the QHD 32–6 field development included six platforms. In early years of the project, CCEC assigned experts in different disciplines from Chevron's organizations around the world to help the operator with planning and execution of the development project and production operations. With strong partnership between the two companies, it took only two years from signing the petroleum contract to first production start–up. Through production optimization and small scale infill drilling, the QHD32–6 field was able to maintain very steady production year after year.
In order to optimize the recovery and maximize value of the QHD32-6 field, CCEC and CNOOC signed an agreement in 2013 for a second phase redevelopment including four new platforms. Through cooperation during the years, CCEC has introduced many technical and management tools and systems to the partner, including safety principles and best practices, project management systems, asset management systems, and new technologies in drilling and completion, and metering systems.