What Is an Oil Field?

The sum of oil and gas reservoirs under the control of a single geological structure (or stratum) within the same oil and gas producing area. An oil and gas field may have one or more oil and gas reservoirs. In the same area, the oil field is mainly called oil field, and the gas field is mainly called gas field. According to the geological factors that control the area of oil and gas production, oil and gas fields are divided into three categories: structural oil and gas fields. Means that the area of oil and gas production is controlled by a single structural factor, such as folds and faults. Strata-type oil and gas fields. Areas of anticline or monoclinic tectonic background that are controlled by formation factors (such as unconformity of strata, annihilation, and lithological changes). Compound oil and gas fields. Oil and gas fields that are not controlled by a single structural or stratum factor within the oil and gas producing area, but are controlled by multiple geological factors.

Oil fields refer to specific areas of crude oil production. Sometimes it is the general name of the underground oil accumulation in a specific area. Broadly speaking, several oil areas are called oil fields. For example, Daqing Oilfield, North Sea Oilfield in Britain, Tyumen Oilfield in Russia, etc. Oilfields are naturally occurring hydrocarbons underground and are liquid under surface conditions. In contrast, if it is still a gas under surface conditions, it is natural gas. The specific area of natural gas production is natural gas fields. The amount of oil recoverable reserves determines the value of extraction. It is required to accurately calculate the size of the oil-bearing area, the number and thickness of oil layers, and the oil reserves per unit area.

Generally, oilfields with recoverable reserves of more than 500 million tons are extra large oilfields, large oilfields of 70 million to 100 million tons are large, and small oilfields of 70 million tons or less. To calculate the possible oil wells and annual production, some oilfields have large reserves, but the production is not necessarily high, which is mainly affected by the driving capacity of the oilfield. After careful calculation from reserves to production, it can be formally exploited if it does have economic value for exploitation. ^[2]

The driving type of the oil field is related to the choice of development method. According to the oil storage situation, it determines the force (natural energy or artificial pressure) to develop the oil field. Water pressure drives the oil field, using the energy of the high-pressure water at the edge, the ultimate recovery rate is the highest, which can reach 50-30%; air pressure drives the oil field, which pushes crude oil to the bottom of the well by the gas cap energy, and the final recovery rate is 40 50%; Dissolved gas drives the oil field, and the expansion of the gas separated from the oil layer causes the crude oil to flow to the bottom of the well, and the ultimate recovery is only 15-30%; elastically drives the oil field, which is compressed by rock pressure and oil, using the power of the oil layer pressure to reduce The oil body expands and flows to the bottom of the well; gravity drives the oil field, and crude oil flows to the bottom of the well by its own gravity. The latter two oilfields have lower recovery factors. The difference in final recovery rate affects the degree of resource utilization and investment effect, which directly affects the total investment and development speed of oil field development, and of course directly affects the value of oil field development, which has a great effect on the layout of the oil field. In addition, the layout of the well site must be considered.

It includes wellsite equipment, gathering and transportation pipelines, oil transfer pumping stations, and crude oil depots at the mine. This requires sufficient land area and links to national oil pipelines. If there is no wide area, it will inevitably affect the layout of the oil field. The geographical location of the oilfield is also very important. Even if the above conditions are met, the oilfield's geographical location is far from the consumer area, and it is inconvenient to construct oil pipelines. The presence or absence of labor will also affect oil development. Therefore, when laying out an oil field, it attaches great importance to its geographical location, its proximity to consumer areas and large ports, the presence of labor nearby, and the status of nearby transportation equipment.

Gavar field: located

Oilfield natural gas

1. Daqing Oilfield

3. Liaohe Oilfield

4. Karamay Oilfield

5. Dagang Oilfield

6. North China Oilfield

7.Sichuan Oilfield

8. Jilin Oilfield

9. Qinghai Oilfield

10.Tarim Oilfield

11. Tuha Oilfield

12. Yumen Oilfield

13. Yunnan, Guizhou and Guizhou Petroleum Exploration Bureau

14. Jidong Oilfield

Oilfield Petrochemical

15. Shengli Oilfield (Shengli Petroleum Administration Bureau)

16. Zhongyuan Oilfield (Zhongyuan Petroleum Exploration Bureau)

17. Henan Oilfield (Henan Petroleum Exploration Bureau)

18. Jianghan Oilfield (Jianghan Petroleum Administration Bureau)

19. Jiangsu Oilfield (Jiangsu Petroleum Exploration Bureau)

20.Southwest Petroleum Bureau

21.Northwest Petroleum Bureau

22.North China Petroleum Bureau

23.East China Petroleum Bureau

24. Northeast Petroleum Bureau

25. Shanghai Offshore Oil Bureau

Oilfield other units

26. CNOOC Nanhai East Company

27. Yanchang Oilfield (State-owned Enterprise of Shaanxi Province)

Daqing Oilfield

It is located in the west of Heilongjiang Province, in the middle of the Songnen Plain, and between Harbin and Qiqihar. The oil field is 140 kilometers long from north to south, 70 kilometers wide from east to west, with a total area of 5,470 square kilometers. In March 1960, the CPC Central Committee approved the launch of the oil battle. In 1963, a production capacity of 6 million tons was formed. In that year, crude oil production of 4.39 million tons played a decisive role in achieving self-sufficiency in PetroChina. In 1976, the crude oil output exceeded 50 million tons. By 1996, it had successively produced 50 million tons of crude oil for a period of 21 years. With an annual output of 56 million tons of crude oil in 1995, it is China's largest oil field.

Shengli Oilfield

Located in the Yellow River Delta on the coast of the Bohai Sea in northern Shandong, it is mainly distributed in 28 counties (districts) in 8 cities including Dongying, Binzhou, Dezhou, Jinan, Weifang, Zibo, Liaocheng, and Yantai. The main scope of work is about 44,000 square kilometers. With an annual output of 30 million tons of crude oil in 1995, it is the second largest oil field in China

Liaohe Oilfield

The oil field is mainly distributed in the plains of the middle and lower reaches of the Liaohe River, and the beaches of eastern Inner Mongolia and Liaodong Bay. 26 oilfields have been developed and built, including 9 major production bases including Xinglongtai, Shuguang, Huanxiling, Jinzhou, Gaosheng, Shenyang, Ciyuyu, Lengjia, and Kerqin, covering 13 cities (regions) and 32 counties in Liaoning Province and Inner Mongolia (Banner), with a total area of nearly 100,000 square kilometers. In 1995, the output of crude oil was 15.52 million tons, ranking third in the country.

Karamay Oilfield

Located in Karamay, Xinjiang. In the past 40 years, 19 oil and gas fields have been found in the Junggar Basin and the Tarim Basin, with Karamay as the mainstay, 15 oil and gas fields have been developed, and the supporting production capacity of 7.92 million tons of crude oil has been completed (6.031 million tons of thin oil and 1.889 million tons of heavy oil), with 393 million cubic meters M natural gas production capacity. Since 1990, onshore crude oil production has ranked fourth in the country. In 1995, the annual output of crude oil was 7.9 million tons.

Sichuan Oilfield

It is located in the Sichuan Basin and has a history of 60 years. It has found 85 gas fields, 12 oil fields, and 55 oil-bearing structures. Four gas regions in the south, southwest, northwest and east are built in the basin. At present, the production of natural gas accounts for 42.2% of the country's total output. It is the largest gas field in China. In 1995, it produced 7.18 billion cubic meters of natural gas and 170,000 tons of crude oil annually.

North China Oilfield

Renqiu City, located in the Jizhong Plain of central Hebei Province, includes oil and gas production areas in Beijing, Hebei, Shanxi and Mongolia. In 1975, a exploratory well Ren 4 on the Jizhong Plain spewed out 1,000 tons of high-yield industrial oil flow per day, and discovered the largest carbonate buried hill oil field in China, Renqiu Oilfield. In 1978, the output of crude oil reached 17.23 million tons, which made an important contribution to the national crude oil output exceeding 100 million tons that year. Until 1986, it maintained an annual output of 10 million tons of crude oil for 10 years. In 1995, it produced 4.66 million tons of crude oil and 313 million cubic meters of natural gas.

Dagang Oilfield

Located in Tianjin Binhai New Area, its exploration area is vast, including Dagang exploration area and Xinjiang Urdus Basin. The total exploration area is 34629 square kilometers, of which Dagang exploration area is 18629 square kilometers. At present, 24 development zones of 15 oil and gas fields have been completed and put into operation in Dagang Exploration Area, with an annual production capacity of 4.3 million tons of crude oil and 380 million cubic meters of natural gas.

Zhongyuan Oilfield

Located in the Liyang area of Henan Province, it was discovered in 1975. After 20 years of exploration and development and construction, it has accumulated 455 million tons of proven petroleum geological reserves and 39.57 billion cubic meters of proven natural gas reserves. It has accumulated 77.23 million tons of crude oil and 133.8 tons of natural gas. One hundred million cubic meters. Now it is one of the important oil and gas production bases in eastern China. In 1995, it produced 4.1 million tons of crude oil and 1.1 billion cubic meters of natural gas.

Jilin Oilfield

Located in the Fuyu area of Jilin Province, oil and gas exploration and development began in two major basins in Jilin Province. 18 oilfields have been discovered and proven. Fuyu and Xinmin oilfields are large oilfields with reserves exceeding 100 million tons. Production scale of oversized enterprises with an annual output of over 3.5 million tons of crude oil and a processing capacity of 700,000 tons of crude oil.

Henan Oilfield

Located in the Nanyang Basin in southwestern Henan, the mining area spans the three cities of Nanyang, Zhumadian and Pingdingshan, and is distributed in 8 counties including Xinye and Tanghe. A total of 14 oil fields have been found, with proven oil geological reserves of 170 million tons and oil-bearing area of 117.9 square kilometers. In 1995, the annual output of crude oil was 1.92 million tons.

Changqing Oilfield

The exploration area is mainly in the Shaanxi-Gansu-Ningxia Basin, with a total exploration area of about 370,000 square kilometers. Oil and gas exploration, development and construction began in 1970. 22 oil and gas fields have been found, including 19 oil fields. The cumulative proven oil and gas geological reserves are 541.888 million tons (including the proven natural gas reserves of 233.008 billion cubic meters, which are equivalent to crude oil reserves). With an annual output of 2.2 million tons of crude oil and 100 million cubic meters of natural gas.

Jianghan Oilfield

It is an important comprehensive oil base in central and southern China. The oil field is mainly distributed in 7 cities and counties such as Qianjiang and Jingsha in Hubei Province, Shouguang City, Guangrao County in Shandong Province, and Hengyang City in Hunan Province. Twenty-four oil and gas fields have been discovered, with a proven oil-bearing area of 139.6 square kilometers and a gas-bearing area of 71.04 square kilometers. A total of 21.187 million tons of crude oil and 954 million cubic meters of natural gas were produced. In 1995, the annual output of crude oil was 850,000 tons.

Jiangsu Oilfield

The oil area is mainly distributed in 8 counties and cities in Yangzhou, Yancheng, Huaiyin, and Zhenjiang in Jiangsu Province, and 22 oil and gas fields have been developed. Currently, the main object of exploration is in the Dongtai depression of the Subei Basin. The annual output of crude oil in 1995 was 1.01 million tons.

Qinghai Oilfield

Located in the Qaidam Basin in the northwest of Qinghai Province. The area of the basin is about 250,000 square kilometers, and the sedimentary area is 120,000 square kilometers. The Mesozoic and Cenozoic sedimentary area with oil and gas prospects is about 96,000 square kilometers. At present, 16 oilfields have been proven and 6 gasfields. Annual output of 1.22 million tons of crude oil in 1995

Tarim Oilfield

Located in the Tarim Basin in southern Xinjiang. It is 1,400 kilometers long from east to west, and 520 kilometers wide from the north to the south, with a total area of 560,000 square kilometers. It is China's largest inland basin. In the middle is the Taklimakan Desert, known as the "Sea of Death." In 1988, after a high-yield gas flow was ejected from Well Lunan 2, after 7 years of exploration, 9 large and medium-sized oil and gas fields and 26 oil-bearing structures have been proved. The cumulative proven oil and gas geological reserves are 378 million tons, with an annual output of 5 million crude oil, Resources guarantee of 801 million tons of condensate oil and 2.5 billion cubic meters of natural gas. The annual output of crude oil in 1995 was 2.53 million tons.

Tuha Oilfield

Located in Turpan and Hami Basin, Xinjiang, it is responsible for oil exploration in Turpan and Hami Basin. The basin is 600 kilometers long from east to west and 50130 kilometers wide from north to south, with an area of about 53,000 square kilometers. In February 1991, the Turpan Petroleum Exploration and Development Campaign was fully launched. By the end of 1995, a total of 14 oil and gas fields, including Shanshan and Wen Jisang, and 6 oil- and gas-bearing structures had been discovered. The proven oil and gas bearing area was 178.1 square kilometers, with a cumulative proven oil and gas reserves of 208 million tons and natural gas reserves of 71.3 billion cubic meters. The annual output of crude oil in 1995 was 2.21 million tons.

Yumen Oilfield

It is located in Yumen City, Gansu Province, with a total area of 114.37 square kilometers. The oilfield was put into development in 1939. In 1959, crude oil production reached 1.4029 million tons, accounting for 50.9% of the country's crude oil production that year. It has created excellent results of stable production of 600,000 tons in the 1970s and 10 years of 500,000 tons in the 1980s. Known as the cradle of China's petroleum industry. In 1995, the annual output of crude oil was 400,000 tons.

Yunnan Qiangui Petroleum Exploration Bureau

Responsible for oil and gas exploration and development in Yunnan, Guizhou and Guangxi provinces. The area is 860,000 square kilometers, with a large number of Mesopaleozoic and numerous Tertiary small basins, and the area available for exploration is 277,000 square kilometers. Significant breakthroughs have been made in oil and gas exploration in Baise, Chishui, Chuxiong and other regions, demonstrating the vast oil and gas development prospects in Yunnan, Guizhou and Guizhou. In 1995, the annual output of crude oil was 100,000 tons.

Jidong Oilfield

Located on the northern coast of the Bohai Bay. The oilfield exploration and development covers seven counties, including Tangshan, Qinhuangdao, and Tanghai, with a total area of 6,300 square kilometers, of which 3,600 square kilometers is land, and 2,700 square kilometers are intertidal and extremely shallow. Thirteen oil-bearing formations in 7 oil fields including Gao Shangbao, Liuzan and Yang Gezhuang have been discovered successively. In 1995, the annual output of crude oil was 510,000 tons.