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The First Large-Scale Offshore Drilling of China Completed!

The Kenli 6-1 oilfield drilling development project consists of three blocks: Block 4-1, Block 10-1 North, and Blocks 5-1, 5-2, and 6-1. There are a total of 9 drilling operating platforms, with 177 wells drilled, it is China’s offshore drilling development project with the largest scale, the shortest time and the most platforms to date.
According to Feng Shuo, Bonan regional project manager of the Engineering Technology Operation Center of CNOOC Tianjin Branch: "In the face of many problems such as the distribution of oil and gas field reserves that are 'scattered, narrow, thin, and miscellaneous', the large-scale development of billion-ton oil fields, and the construction of intelligent platforms, etc., the project uses management model innovation as a breakthrough, and through the empowerment of localized process technology, it ensures the efficient operation and progress of the project, and comprehensively achieves the goals of 'increasing speed, improving quality, increasing production, and improving efficiency'."
It is understood that the Kenli 6-1 Oilfield has innovatively implemented a new drilling model of the "Multi-Vssel Drilling Competition" and selected drilling platforms from CNOOC and CNPC to conduct drilling operations on nine drilling platforms in a "competition on the same stage". A good situation has been formed within the project of "compare and learn from each other and strive to be the first".
During the project development process, through the integrated application of system drilling technology, various problems in efficient drilling of shallow long-reach wells were solved, and the CNOOC "Xuanji" drilling system was introduced to practice intelligent completion, open hole staged sand control, and integrated wet joint pumps. Working conditions, rotating casing running, post-casing logging and other process technologies have brought the application and promotion of localized tools to a new level.
Liu Baosheng, deputy general manager of the Engineering Technology Operation Center of CNOOC Tianjin Branch, said, “The project took less than two years to carry out large-scale drilling operations of more than 100 wells, and concentrated on completing the shallow exploration discovery of the low uplift in Laibei, Bohai Sea, my country. The rapid development of the first large-scale 100-million-ton lithological oil field has achieved excellent results with a speed increase of more than 20%, breaking my country's offshore oil field drilling development record."
At the same time, as the first drilling project in the Bohai Oilfield to be connected to shore power development, the Kenli 6-1 oilfield drilling development project actively implements the "dual carbon" strategy and uses power grid shore power to replace traditional diesel power generation on offshore drilling platforms for operations. Through shore power transformation, diesel consumption costs can be significantly reduced, and a single platform can also achieve an average annual reduction of nearly 10,000 tons of carbon dioxide emissions.
Yu Guimin, deputy general manager of CNOOC Tianjin Branch, said: “The key engineering technology system for the Bohai Oilfield’s exploration of large-scale and rapid development of large-scale offshore oil fields has completed the high-quality construction of Kenli’s 600-100 million ton oil field, and will help the rapid realization of subsequent 100-million ton oil fields. Intelligent, large-scale and standardized drilling development has good practical significance."

Kenli 6-1 Oilfield, the first 100-million-ton oilfield developed by large-scale drilling offshore China, completed drilling operations for all 177 wells, with a project quality qualification rate of 100%, a speed increase of over 20%, and the application of thirteen new technologies. It broke eight CNOOC drilling records and greatly shortened the production capacity construction cycle. Currently, the oil field has reached a daily production capacity of nearly 10,000 cubic meters of crude oil.