CNOOC Limited announced today (February 25) that China's deep oil and gas exploration in the Bohai Sea has made new major discoveries. The new drilling and testing capacity of the Bozhong 26-6 oilfield reached a new high, with more than 40 million cubic meters of new proven oil and gas reserves, and the cumulative proven reserves exceeded 200 million cubic meters. The Bozhong 26-6 oilfield is located in the southern part of the Bohai Sea, about 170 kilometers away from Tianjin. The recently completed drilling evaluation well, Bozhong 26-2 North 2 well, encountered an oil and gas layer up to 118 meters thick during the drilling process. The test results showed that the average daily oil production of the well exceeded 390 cubic meters, and the daily gas production exceeded 50,000 cubic meters, setting a record high for the test production capacity of new drilling wells in the oilfield.
Zhou Jiaxiong, Deputy General Manager of CNOOC Tianjin Branch: According to the normal recovery factor, the Bozhong 26-6 oilfield can be exploited more than 30 million cubic meters. After being refined into gasoline, it can meet the daily transportation use of urban residents with a population of one million for more than 20 years, and at the same time, it can extract more than 11 billion cubic meters of natural gas, which can meet the household gas of urban residents with a population of one million for more than 60 years, which has considerable social and economic benefits.
Scientific and technological innovation promotes technological breakthroughs in deep offshore oil and gas exploration.
With the new drilling well testing capacity reaching a new high, the Bozhong 26-6 oilfield has become the world's largest metamorphic rock oilfield. Offshore oil and gas is an important energy growth pole, and CNOOC's researchers have been increasing their exploration technology and overcoming a number of problems to achieve exploration breakthroughs.
The reservoirs of the Bozhong 26-6 oilfield are several thousand meters below the seabed and are mainly composed of metamorphic rocks. Metamorphic rocks refer to the rocks formed by the original rocks in the earth's crust due to different degrees of changes in mineral composition and structural structure due to tectonic movements, magmatic activities or changes in heat flux in the earth's crust.
Previously, a number of well-known foreign oil companies have drilled more than 80 deep wells in this area, but none of them have made such large-scale discoveries. CNOOC's researchers have overcome the imaging problems in the deep part of the complex fault zone through self-developed ultra-low frequency all-round exploration and other technologies, and have made an exploration breakthrough in the Bozhong 26-6 oilfield.
Xu Changgui, Deputy Chief Engineer of CNOOC Exploration: It has solved the problem that it is difficult to accumulate oil and gas in the deep part of the Bohai Sea such a strong active fault zone on a large scale, further consolidated the material foundation for increasing reserves and production in the Bohai Oilfield, and provided a solid theoretical and technical reserve for the exploration and development of China's offshore oil industry to develop in deep and complex fields. (*CCTV news client).