Bohai Oilfield has become the largest crude oil base in my country - with an annual output of more than 30 million tons of crude oil, and the increase in crude oil accounts for nearly 50% of the national increase

On January 9, CNOOC announced that China's largest offshore oilfield, CNOOC Bohai Oilfield, will produce 30.
132 million tons of crude oil in 2021, making it China's largest crude oil production base, with crude oil increment accounting for nearly 50% of the national increment.
%
.

30 million tons of crude oil is equivalent to 1/7 of China's annual crude oil production.
To extract these 30 million tons of crude oil, an average of 488 drilling wells are required to operate at the same time.
The total drilling footage is 1.
12 million meters, which is equivalent to 126.
6 Mount Everest heights
.

Founded in 1965, Bohai Oilfield is the birthplace of China's offshore oil industry and the main oilfield with the highest output, the largest scale and the best benefit in CNOOC
.
In the more than 50 years since it was put into production, it has discovered over 4.
4 billion tons of proven oil geological reserves and nearly 500 billion cubic meters of natural gas reserves, contributing over 493 million tons of oil and gas to the country
.

Since the comprehensive implementation of the "Seven-Year Action Plan" for increasing oil and gas reserves and production in 2019, Bohai Oilfield has continuously explored and discovered 4 million-ton oil and gas fields, producing a total of 85.
353 million tons of crude oil and 9.
15 billion cubic meters of natural gas in three years
.
At present, the oilfield has more than 50 oil and gas fields in production and more than 180 production facilities.
It has built a comprehensive oil and gas production base covering three provinces and one city around the Bohai Sea, integrating exploration and development, engineering construction, and production and operation
.

Speaking of the geological structure of the Bohai Bay Basin, Xue Yongan, Chief Exploration Engineer of CNOOC Tianjin Branch, bluntly said that its structure is complex, "It's like a 'golden plate' that fell on the ground and shattered and was stepped on a few times.
The distribution of oil reservoirs is very scattered.
It is complicated and separated by a layer of seawater, making exploration and development more difficult
.
” In order to find these scattered oil reservoirs, Bohai Oilfield has successively applied the concepts of "three-dimensional exploration", "cluster exploration", "combination exploration" and "value exploration", and the proven reserves have been rising continuously
.
After entering the "13th Five-Year Plan", Bohai Oilfield has innovatively proposed the theory of "gas formation in lake basins" and the theory of "convergence ridge" accumulation, and discovered several billion-ton oil and gas fields, laying a solid reserve foundation for building China's largest crude oil production base.

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Zhao Chunming, chief development engineer of CNOOC Tianjin Branch, said that Bohai Oilfield not only has scattered oil reservoirs, but also has large crude oil viscosity, mainly heavy oil reservoirs
.
To this end, since the 1990s, CNOOC has carried out three consecutive "premium and fast drilling" promotion actions, reducing the average drilling cycle from 57 days to less than 10 days, and increasing the drilling efficiency by 6 to 7 times, which is the highest in Bohai Oilfield.
The rapid development has broken through key bottlenecks, and successively overcame a number of technical problems in exploration and development.
These achievements indicate that China's offshore exploration and development technology has reached a world-class level
.

The growth of domestic crude oil production depends on the sea, and the growth of offshore crude oil production depends on the Bohai Sea
.
Yan Hongtao, general manager of CNOOC Tianjin Branch, said that during the "14th Five-Year Plan" period, Bohai Oilfield will promote the "seven-year action plan" with high quality, and build Bohai Oilfield into an integrated exploration and development, standardization of engineering construction, intelligent oil and gas production, A benchmark energy base with lean operation and management, striving to achieve breakthroughs in exploration, hard growth of crude oil, and great development of natural gas, to ensure that oil and gas production will reach 40 million tons in 2025
.

As China's largest offshore oil and gas producer, CNOOC has ranked first in domestic crude oil production increments for three consecutive years
.
In 2021, the company will produce 48.
64 million tons of crude oil domestically, a year-on-year increase of 3.
23 million tons, accounting for about 80% of the total domestic crude oil increase
.

Wang Dongjin, chairman of CNOOC, said that CNOOC will vigorously promote the "tough project of increasing reserves and production, strengthening the foundation of scientific and technological innovation, and leapfrogging projects of green development", continue to increase investment in exploration and development, and further leverage the contribution of offshore oil and gas production to China's oil and gas.
The important role of the safe and stable supply of resources and the reduction of external dependence is to firmly hold the energy job in our own hands
.