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The maximum displacement is about 3 medium-sized aircraft carriers, and it has 3 world firsts.
It integrates the culmination of offshore oil engineering, and spans from 300 meters to 1,500 meters in ultra-deep water.
Recently, the first 1,500-meter ultra-deep water gas field "Shenhai No.
1", the first 1500-meter ultra-deepwater gas field developed by China's self-operated exploration and development, was officially put into production, marking that CNOOC's exploration and development capabilities have entered the "ultra-deep water era" in an all-round way.
The upgrade is of great significance and is a solid step to enhance China's deep-sea resource development capabilities and build a maritime power
.
Crossing to 1500 meters of ultra-deep water
The "Shenhai No.
1" large gas field is located in the Lingshui Sea, 150 kilometers away from Sanya City, Hainan Province.
The proven natural gas reserves are over 100 billion cubic meters, the maximum water depth is over 1,500 meters, and the maximum well depth is over 4,000 meters.
It is an offshore ultra-deep water gas field with the deepest water depth and the most difficult exploration and development
.
Internationally, the oil and gas resources in the water depth of more than 300 meters are generally defined as deep water oil and gas, and the water depth above 1500 meters is called ultra-deep water
.
At present, China's dependence on foreign oil exceeds 70%, and dependence on natural gas exceeds 40%.
It is very important to improve China's energy security and strengthen resource security
.
As a major marine country, China is rich in marine oil and gas resources
.
However, deep water is not just "water depth", the quantitative change of water depth brings about a qualitative change in the difficulty of operation
.
From shallow water to deep water, completely different operation equipment, production equipment and development technology need to be adopted.
At present, only a few large oil companies in the world have deep water development technology capabilities
.
At the same time, the cost of trial and error in deepwater engineering is high.
For an underwater production system at a depth of 1,500 meters, the surface of the equipment is subjected to a pressure of 1,500 meters of water column, which is equivalent to 150 atmospheres of pressure on the outer surface of the equipment
.
Wang Dongjin, Secretary of the Party Leadership Group and Chairman of China National Offshore Oil Corporation, said that the development of the "Shenhai No.
1" large gas field means a major breakthrough in China's deepwater oil and gas development capability and deepwater marine engineering equipment construction level, marking that China has fully grasped the opening of the South China Sea.
The "key" of the deep-sea energy treasure has achieved a historic leap from 300 meters to 1,500 meters of ultra-deep water
.
It is expected to build the "South China Sea Trillion Atmospheric Area"
Zhou Shouwei, an academician of the Chinese Academy of Engineering, said that China's deepwater oil and gas exploration and development started relatively late, but after nearly 20 years of technological research and independent innovation, China has successively overcome three world-class oil and gas exploration and development problems in the deep water, high temperature and high pressure fields, forming a A complete set of deepwater oil and gas exploration and development technology systems with Chinese characteristics has made China one of the few countries in the world that can independently carry out deepwater oil and gas exploration and development
.
In order to efficiently develop the "Shenhai No.
1" large gas field, CNOOC adopted an all-sea development model of "semi-submersible production platform + underwater production system + submarine pipeline", and customized the world's first 100,000-ton-scale project for it.
Deepwater semi-submersible production and storage platform - "Deep Sea No.
1" energy station
.
According to You Xuegang, general manager of the "Shenhai No.
1" large gas field development project, the energy station is designed according to the high standard of "non-dock maintenance for 30 years"
.
The maximum displacement is 110,000 tons, equivalent to three medium-sized aircraft carriers
.
"Deep Sea No.
1" has achieved three world-class innovations: the world's first semi-submersible platform column oil storage, with a maximum oil storage capacity of nearly 20,000 cubic meters; the use of the world's largest-span semi-submersible platform truss block; the first on land The upper part adopts the large closing technology of wet half piers in the dock
.
At the same time, the energy station uses 13 domestic pioneering technologies, which is a masterpiece in the field of marine engineering construction in China, and realizes the integrated functions of condensate production, storage and export
.
"Shenhai No.
1" large gas field was discovered in 2014 through exploration.
It is China's first self-designed and built sixth-generation deep-water semi-submersible drilling platform "Haiyang Shiyou 981" discovered in the South China Sea at a depth of 1,500 meters.
The first major oil and gas discovery of exploration
.
According to reports, after the "Shenhai No.
1" large gas field is put into operation, deep-water natural gas will be connected to the national natural gas pipeline network through submarine pipelines, and 3 billion cubic meters of gas will be supplied to Guangdong, Hong Kong, Qiong and other places every year, which can meet the requirements of four points of the Guangdong-Hong Kong-Macao Greater Bay Area.
One of the natural gas needs for people's livelihood has increased the natural gas supply capacity of the South China Sea to more than 13 billion cubic meters per year, which is equivalent to 2.
6 times the annual gas consumption of Hainan Province
.
At the same time, the completion and operation of the "Shenhai No.
1" energy station can drive the development of new deepwater gas fields such as Lingshui 25-1 in the surrounding area, forming a gas field group, relying on the built natural gas pipeline network connecting the Guangdong-Hong Kong-Macao Greater Bay Area and Hainan Free Trade Port The main artery, to maximize the development of production and transmission of natural gas resources
.
It is estimated that by 2025, the proven reserves of natural gas in the three basins of Yinggehai, Qiongdongnan and Pearl River Estuary in the South China Sea will reach 1 trillion cubic meters, and the "South China Sea trillion gas area" will be built, which will effectively drive the economic development and energy structure transformation of surrounding areas.
.
Zhou Shouwei said that "Shenhai No.
1" means that China has entered the world's deepwater oil and gas development camp, and can independently develop and build deepwater oil and gas fields in the South China Sea
.
In the long run, there are still wider sea areas and more ultra-deep water areas in the South China Sea waiting for exploration and development.
The technology and equipment system established by the development of the "Shenhai No.
1" gas field has laid the foundation for the future development of the deep blue and deep sea
.
