Offshore oil

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Currently, oil and gas resources in deep and ultra-deep waters are becoming a focal point for countries such as the United States, the United Kingdom, Norway, and Brazil to compete for development. China’s deep-sea oil and gas resources, as well as natural gas hydrates, also need to be explored and developed through various means—Recently, three pieces of news have attracted considerable attention. 　　In Beijing, China National Offshore Oil Corporation officially announced that its parent company, China National Offshore Oil Group Corporation, has signed an oil contract with CNOOC China Petroleum Co., Ltd. for the deep-water block 43/11 located in the Pearl River Delta basin in the South China Sea. This block is located in the sea about 350 kilometers to the southeast, at water depths ranging from 1,500 meters to 3,000 meters, and covers an area of 9,729 square kilometers. 　　In Heilongjiang, China’s first deep-sea engineering technology research center was established at Harbin Engineering University. Within 5 years, a **-level deep-sea engineering technology research center will be established here. 　　In Guangdong, on the morning of May 7th, the scientific research vessel “Tanbao” of the Guangzhou Marine Geology Survey Bureau moored steadily at the Huangpu Wharf in Guangzhou. This ship was tasked with the research project under the **\"863\" Program – deep-water oil and gas geophysical exploration technologies – and achieved breakthrough results. 　　Deep-sea oil and gas exploration has attracted the attention of the entire society and has become a new hot spot for investment by energy companies, a process that is accelerating amid growing international cooperation. 　　The dream of deep-sea oil and gas exploration – to explore the unfathomable and mysterious oceans – has been a dream for humanity since ancient times. 　　Entering the 21st century, the oceans have gradually become a key target for global oil exploration. According to predictions by international authorities, 44% of the world’s total oil and gas reserves in the future will come from deep-sea areas. 　　In fact, the oil giants around the world have long been eyeing deep-sea oil and gas as a highly promising area for investment. For example, the French company Total has been granted permission to participate in the exploration and development of two deep-sea oil fields in northwestern Australia. Under the agreement between Total and the Australian energy company, Total will hold a 30% stake in one of the exploration areas, which is located 150 kilometers off the coast at depths of 300 to 1,500 meters. In addition, Total has also acquired a 50% stake in another exploration area located 20,000 kilometers offshore and at depths of 1,000 to 2,000 meters. The exploration plans for both areas will begin this year. 　　China has a coastline of 18,000 kilometers, ranking fourth in the world. In accordance with international law and the relevant provisions of the United Nations Convention on the Law of the Sea, the area of maritime waters claimed by our country amounts to 3 million square kilometers, which is nearly one-third of the area of our land territory. 　　At present, offshore oil and gas exploration in our country is mainly carried out in shallow waters (with water depths of less than 400 meters), and the available reserve oil resources are clearly insufficient. Within our country’s blue territories covering over 3 million square kilometers, there are approximately 36 billion tons of oil reserves, the majority of which are found in deep and medium-depth waters. There are also vast reserves of natural gas hydrates, namely \"flammable ice,\" which holds the greatest potential to become an alternative energy source in this century. 　　Among them, China’s South China Sea is one of the four major marine oil and gas resource regions in the world. The oil geological reserves in the South China Sea are estimated to be between 23 billion and 30 billion tons, earning it the title of the \"second Persian Gulf\" in the world. Zhang Hongtao, deputy director of the China Geological Survey under the Ministry of Land and Resources, said recently that the 10 major oil and gas-bearing basins off the coast of China cover an area of 973,000 square kilometers, with the potential reserves of oil and natural gas accounting for 26% and 27% of the country’s total reserves respectively. 　　The challenges of deep-sea oil and gas development: Deep-sea oil exploration is considered to be an important frontier in the oil industry, and significant progress has been made in this area in places such as the Gulf of Mexico, Brazil, and West Africa. However, in our country, due to the relatively backward key technologies and equipment for deep-sea oil and gas exploration, the development of deep-sea oil and gas remains in its initial stage. 　　To understand the difficulties of exploring the deep sea, consider some figures: the average height of land above sea level is 840 meters, while the average depth of the ocean is as high as 3,730 meters. Of this depth, 12.88% falls within the range of 1,000 to 3,000 meters, and 1.38% is at depths of over 6,000 meters. The vast majority of the ocean’s area lies between 3,000 and 6,000 meters in depth, accounting for 73.83% of the total ocean area. 　　In the field of oil and gas exploration, waters below 400 meters are considered normal depth operations, depths between 400 meters and 1,500 meters fall under deep-water operations, while depths greater than 1,500 meters are classified as ultra-deep-water operations. Compared to shelf and onshore exploration drilling operations, deep-water operations are extremely costly (the construction cost of offshore oil fields is about 3 to 5 times that of onshore ones), representing a high-tech, highly complex systematic project. 　　As the depth increases, the difficulty of offshore oil and gas exploration also rises sharply. Therefore, it is necessary to utilize the most advanced contemporary scientific and technological innovations, such as shipbuilding technology, satellite positioning and computer technology, modern machinery, as well as modern environmental protection and corrosion prevention techniques, in order to address a range of challenges associated with deep-sea oil exploration, including positioning, the establishment of moorings for fixed offshore platforms or floating platforms in the deep sea, wastewater disposal, and the storage and transportation of oil and gas at sea. 　　Whether the equipment for offshore oil and gas development is advanced directly determines the level of development of offshore oil and gas resources. Although our country has achieved domestic production in some relatively advanced oil and gas engineering equipment, the vast majority of key technologies remain in the hands of others. Domestic manufacturers are mainly limited to the manufacturing of drilling and production platforms, and the related supporting technologies are lagging behind; most of the equipment is imported from abroad, which severely restricts the large-scale development of offshore oil and gas resources. 　　Due to outdated technical equipment, the development of offshore oil and gas resources in China is currently concentrated mainly in coastal areas at depths of less than 200 meters; the country does not yet possess the capability to operate in waters deeper than 500 meters, leaving large-scale exploration and development of deep-sea oil and gas resources virtually non-existent. 　　Exploration for deep-sea oil and gas: Oil and gas exploration in deep seas is characterized by high capital requirements, advanced technology, significant risks, and high returns. Foreign oil companies often adopt strategies of international cooperation and joint ventures in order to spread these risks. 　　The international operation of offshore oil is an integral part of the world oil market system. In terms of the entities involved in its operation, this market includes upstream activities such as exploration and development, as well as downstream activities such as transportation and refining ； In terms of operation mode, it includes labor services, block exploration and development, and project contracting ； In terms of the mode of operation, it can be operated as a sole proprietorship, but more often it is a joint venture ； In terms of the sources from which oil and gas products are obtained, these can include crude oil and natural gas, among others. 　　Due to objective constraints, it is only in recent years that the Chinese mainland has begun to explore waters below 200 meters in basins such as the Pearl River Estuary and southeastern Hainan, and has partnered with oil companies from Taiwan to explore the southwestern Taiwan Basin, which is dominated by deep-water areas. As for the deep-water areas of the South China Sea, only route surveys and geophysical surveys of specific areas have been conducted. Although the pace of international expansion by China’s petroleum industry has been accelerating in recent years, offshore oil and gas development remains a significant weak point. 　　In this regard, experts believe that over the next 10 to 20 years, China’s offshore oil and gas development will be led by the three major domestic oil companies (CNPC, Sinopec, and CNOOC), with joint development projects carried out in partnership with foreign companies. This is because, on the one hand, domestic technology is not yet mature, and on the other hand, many uncertain factors need to be taken into account in order to effectively spread risks. 　　It is understood that by the end of the 20th century, China had signed nearly a hundred oil contracts and agreements with over 40 companies in more than 20 countries and regions. Several oil and gas fields developed through cooperation at sea have already gone into production, while some others are under development or in the preliminary stages prior to development. Not long ago, significant progress was made in the China-Vietnam-Philippines cooperation zone, setting a precedent for resolving disputes and carrying out joint development in adjacent areas; this is undoubtedly good news for China’s energy sector. 　　Meanwhile, in accordance with the **oil development plan, between 2004 and 2010, China’s offshore oil exploration will experience a period of rapid growth, with domestic offshore crude oil production doubling compared to the level in 2003. China’s three major oil companies also emphasized in the 11th Five-Year Plan the need to increase investment and actively pursue the development of oil and gas resources in offshore areas, particularly in deep seas, which has created new opportunities for such development in China.