Another billion-ton discovery!

On March 1, CNOOC announced that my country has made another billion-ton discovery in Bohai Sea - Bozhong 26-6 Oilfield. This oilfield is the largest metamorphic rock buried hill oilfield in China and also the largest crude oil production base in my country. The billion-ton oilfield discovered in Bohai Oilfield for three consecutive years has further consolidated the foundation of my country's offshore oil and gas resources reserves and is of great significance to ensuring national energy security.

Bozhong 26-6 oilfield is located in the southern waters of Bohai Sea, about 170 kilometers away from Tianjin, with an average water depth of 22.1 meters. Its structure is located between the two hydrocarbon-rich depressions of the Yellow River Mouth Sag and the Bozhong Sag in Bohai Sea. The discovery well Bozhong 26-6-2 encountered oil and gas layers for a total of more than 320 meters, and the well was completed at a depth of 4,480 meters. The average daily oil production in the test exceeded 270 tons, and the average daily gas production exceeded 320,000 cubic meters, which confirmed that the oilfield has the characteristics of large reserves, good oil quality, and high test production capacity.

The buried hill where the Bozhong 26-6 oilfield is located was formed 3.2 billion years ago. The main rock composition type of the reservoir is metamorphic rock. Since the late 1970s, it has undergone multiple rounds of exploration, but the results have not been ideal. "Since 2018, we have deployed more than 10 deep exploration wells, conducted in-depth research on the impact of faults on the segmentation of buried hills, and innovatively proposed the theoretical understanding that faults have the ability to seal buried hill reservoirs, breaking the traditional understanding that 'water can be found in the upper part of the buried hill, and oil cannot be found underwater', and successfully discovered the Bozhong 26-6 billion ton oilfield." Zhou Jiaxiong, chief geologist of CNOOC Tianjin Branch, introduced.

The proven geological reserves of Bozhong 26-6 Oilfield exceed 130 million tons of oil equivalent. At a normal recovery rate, it can produce more than 20 million tons of crude oil, which can be refined into gasoline to power 10,000 cars for 30 years. At the same time, it can produce more than 9 billion cubic meters of natural gas, which can meet the needs of Tianjin's permanent population for nearly 15 years, and has considerable social and economic benefits.

According to statistics, the cumulative proven geological reserves of oil and gas in the Bohai Oilfield over the past five years have exceeded 1 billion tons, providing strong material support for the Bohai Oilfield to increase its production by 40 million tons and laying a solid reserve foundation for my country's marine oil and gas production to continuously break records.