The world's largest metamorphic oil field officially starts drilling

The Bozhong 26-6 condensate oil field is located in the southern waters of the Bohai Sea, with an average water depth of over 22 meters. In 2024, new proven oil and gas geological reserves will exceed 40 million cubic meters, boosting the cumulative exploration of this oil field. Ming's geological reserves exceeded 200 million cubic meters, making it the world's largest metamorphic oil field.

It is estimated that the Bozhong 26-6 Oilfield can extract more than 30 million cubic meters of crude oil. After being refined into gasoline, it can meet the daily transportation needs of urban residents with a population of one million for more than 20 years. More than 11 billion cubic meters of natural gas have been extracted, which has provided household gas for urban residents with a population of one million for more than 60 years, which has considerable social and economic benefits.

The average well depth of the Bozhong 26-6 oil field development project is 4,835 meters, with a maximum well depth of 5,049 meters. The drilling footage is expected to exceed 160,000 meters, which is equivalent to drilling through 18 Mount Everests. , the target layer is the Archaean buried hill metamorphic rock formation. The bedrock of the buried hill is mainly high-hardness granite. Since it is buried deep in the ground, the temperature reaches 178 degrees Celsius. The extreme operating environment of high temperature and high intensity brings severe challenges to the reliability of drilling instruments and equipment.

In order to ensure efficient development of oil fields, CNOOC has promoted improvements in drill bits, high-temperature mud systems, supporting speed-increasing tools and high-temperature directional well instruments, etc., and has completed targeted improvements in drilling rig equipment, especially high-temperature drilling equipment. The upgrade and optimization of anti-torsion drilling tools have reached the domestic advanced level, ensuring smooth development and production of oil fields.

As the world’s largest buried hill metamorphic oil field, the successful exploration and development of Bozhong 26-6 has increased the confidence and confidence for the Bohai Oilfield to increase its annual oil and gas production by 40 million tons, effectively promoting my country’s offshore Research on key core technologies for deep drilling and completion continues to make progress towards the development of deep ocean energy.