On June 24, the Weizhou 10-3 West Oilfield development project, operated by Roc Oil (Bohai) Company, commenced production, marking the transition into the harvest phase of this high-difficulty offshore marginal oilfield joint development after eight years of intensive efforts. This represents another significant achievement for Roc Oil in its continued commitment to oil and gas exploration and development in the Beibu Gulf, South China Sea.

The Weizhou 10-3 West Oilfield is a typical complex fault-block oilfield characterized by rapidly changing reservoirs and formidable development challenges. Through efficient collaboration and steady progress across all critical phases, the project team has successfully achieved the economically viable development of this complex offshore fault-block oilfield.

The development plan calls for drilling a total of 26 wells, including 15 production wells and 11 water injection wells. The project has completed the construction of a new ultra-thousand-ton wellhead platform and a self-installed production processing platform (MOPU)—the largest, heaviest, and most intelligent of its kind in China.

During the engineering and construction phase, the wellhead platform and the MOPU platform were advanced in parallel. The project team implemented full-process refined management throughout, successfully completing the construction of the thousand-tonne-class wellhead platform. The construction of the MOPU platform also set new domestic records in both weight and technical complexity for mobile production processing platforms.

During the drilling and completion phase, the project team leveraged the strengths of fine reservoir description and geology-engineering integration to optimize well placement, successfully encountering high-quality thick oil pay zones, further enhancing the field's reserve scale and overall economic performance. The first completion operation innovatively adopted the integrated production-injection technique in a single well and was completed 7.5 days ahead of schedule, setting a new benchmark for operational efficiency for wells of the same type.

As the operator, Roc Oil has played a pivotal role in scientific coordination and collaborative management throughout the project development. Facing multiple complex and interfacing operational fronts—including wellhead platform construction, MOPU construction, drilling and completion, subsea pipeline and cable installation, and offshore installation—the project team established a joint management mechanism and a routine coordination system to strengthen seamless integration across all phases. While ensuring safety and quality, the team effectively compressed the construction schedule, demonstrating its refined project management capabilities in the offshore engineering sector.

The successful commissioning of the Weizhou 10-3 West Oilfield represents a significant achievement of multi-party collaboration and shared success under the "innovation-driven, mutual empowerment" model. It has effectively unlocked the previously difficult-to-develop reserves in the Beibu Gulf region and will generate long-term value for all partners involved.