In 2020, the Ministry of Natural Resources will conscientiously implement the spirit of General Secretary Xi Jinping’s important instructions on vigorously enhancing oil and gas exploration and development and ensuring energy security, and actively promote the integration of oil and gas exploration and production, and the implementation of exploration and mining management system reform measures such as competition and assignment of exploration rights. , National oil and gas exploration made a number of important breakthroughs. The proven reserves of oil and gas increased, with 2 new oil fields of 100 million tons, 1 natural gas field of 100 billion cubic meters, and 1 shale gas field of 100 billion cubic meters; Years of steady growth and rapid growth in natural gas production; important progress has been made in oil and gas geological surveys. At the same time, affected by unfavorable factors such as the new crown pneumonia epidemic and low oil prices, the investment in oil and gas exploration and exploitation has declined, and the workload has decreased.
I. Significant increase in new proven reserves of oil and natural gas
In 2020, the national oil and gas (including oil, natural gas, shale gas, coalbed methane and natural gas hydrate) exploration investment was 71.024 billion yuan, a year-on-year decrease of 12.0%; km, a year-on-year decrease of 41.6% and 9.3%; 2,956 exploratory wells were completed with a footage of 8,394,200 meters, a year-on-year increase of 2.1% and 2.9% respectively.
The newly added proven geological reserves of oil were 1.322 billion tons, a year-on-year increase of 17.7%, and have maintained continuous growth since 2018. Among them, there are 4 new basins with proven geological reserves of more than 100 million tons, namely Ordos, Bohai Bay (including sea areas), Junggar and Tarim Basins; there are 2 new oilfields with new proven geological reserves of more than 100 million tons, They are Qingcheng Oilfield in the Ordos Basin and Changji Oilfield in the Junggar Basin.
The newly added proven geological reserves of natural gas were 1,051.458 billion cubic meters, a year-on-year increase of 30.0%. Among them, there are 3 basins with newly added proven geological reserves of more than 100 billion cubic meters, namely the Ordos, Tarim and Sichuan Basins. There is one new gas field with proven geological reserves of more than 100 billion cubic meters, which is the Kelasu gas field in the Tarim Basin.
The newly added proven geological reserves of shale gas were 191.827 billion cubic meters, a year-on-year decrease of 74.9%. The newly added proven reserves came from the Fuling shale gas field in the Sichuan Basin.
The newly added proven geological reserves of coalbed methane were 67.313 billion cubic meters, a year-on-year increase of 950.5%. The newly added proven reserves came from the Qinshui Basin and the eastern margin of the Ordos Basin.
By the end of 2020, China had 1,060 proven oil and gas fields (including 771 oil fields and 289 natural gas fields), 7 shale gas fields, 28 coalbed methane fields, and 3 carbon dioxide gas fields. The cumulative proven geological reserves of oil, natural gas, shale gas and coalbed methane are 42.200 billion tons, 16.88 trillion cubic meters, 2.00 trillion cubic meters and 725.911 billion cubic meters respectively.
Second, the production of oil and coalbed methane continued to grow steadily, the production of natural gas increased rapidly, and the production of shale gas increased significantly
In 2020, the national oil and gas exploration investment was 224.948 billion yuan, a year-on-year decrease of 11.0%; 17,297 development wells and 35.797 million meters were completed, a year-on-year decrease of 26.1% and 31.1% respectively.
The oil output was 195 million tons, a steady increase of 2.1% year-on-year for two consecutive years. Among them, the basins with output greater than 10 million tons included the Bohai Bay (including sea areas), Songliao, Ordos, Junggar, Tarim and Pearl River Mouth Basin. A total of 181 million tons, accounting for 92.6% of the national total.
The national conventional natural gas production was 161.822 billion cubic meters, exceeding 150 billion cubic meters for two consecutive years, a year-on-year increase of 7.2%. Among them, the basins with output greater than 5 billion cubic meters were Ordos, Sichuan, Tarim, Pearl River Estuary, Qaidam and The Songliao Basin has a total output of 149.967 billion cubic meters, accounting for 89.6% of the national total.
The national shale gas output was 20.055 billion cubic meters, a year-on-year increase of 30.4%. The output mainly came from the Sichuan Basin and its periphery. In 2020, the output of surface-developed coalbed methane was 5.767 billion cubic meters, a year-on-year increase of 5.6%, mainly from the Qinshui Basin and the eastern margin of the Ordos Basin.
By the end of 2020, the country has produced 7.35 billion tons of oil, 2.38 trillion cubic meters of natural gas, 69.13 billion cubic meters of shale gas, and 28.866 billion cubic meters of coalbed methane.
III. Important progress has been made in the basic geological survey of oil and gas, and new understanding of the national oil and gas resource evaluation has been obtained during the “13th Five-Year Plan”
Significant progress has been made in new areas such as new districts, new layers, and new types. First, an important breakthrough was made in the investigation of continental shale oil and gas in the Songliao Basin. For the first time, Well Jiliyeyou 1 in the southern Lishu fault depression obtained an industrial gas flow with a daily output of 76,000 m3 in the Shahezi Formation, and obtained new continental shale gas formations and new An important breakthrough in type investigation; Well Songyeyou 3 in the northern Sanzhao sag obtained industrial oil flow in the shale reservoir with normal pressure, medium and low thermal evolution, and opened up a new area for shale oil investigation. Second, new progress has been made in the geological survey of shale gas in Anhui in the lower reaches of the Yangtze River Economic Belt, in the middle reaches of Hunan, in the upper reaches of Yunnan Daguan and Guizhou Danzhai. The third is that Well Xinsudi 1 in the northwestern margin of the Tarim Basin obtained industrial gas flow from the Silurian two-layer fracturing, and new progress has been made in the oil and gas investigation of the new Silurian formation. Fourth, the coalbed methane investigation broke through the industrial gas flow in the mining area, goaf, and deep peripheral wells of Heijidi 4, Heijidi 3, and Heijidi 1 in the Jixi Basin. new field of unconventional oil and gas resource investigation. Fifth, the second round of trial production of natural gas hydrate in the Shenhu area of the South China Sea successfully realized the leap from “exploratory trial production” to “experimental trial production”. Sixth, new progress has been made in the investigation of oil and gas resources in new areas and new formations in key sea areas such as the South Yellow Sea, the East China Sea, and the northern part of the South China Sea.
Comprehensive analysis and summary of the national oil and gas resource evaluation results during the “13th Five-Year Plan”, and the following conclusions are drawn: First, the onshore oil and gas resources have the basis for increasing exploration and development efforts; second, the large basins are still onshore oil and gas exploration The main battlefield; third, the quality of the remaining onshore oil and gas resources is generally deviated, and it is difficult to increase reserves and production, and the deep layers are the main front for major discoveries; fourth, the quality of conventional oil and gas resources in the sea area is relatively good, and offshore is a realistic area for conventional oil and gas production; fifth, unconventional oil and gas The oil and gas resources have great potential and are the strategic replacement area for increasing reserves and production in the future. Technological breakthroughs are the key. Sixthly, the economic evaluation of conventional and unconventional oil and gas resources has realized the corresponding connection between geological resources and economically recoverable resources, and technological innovation and improved management Management efficiency is the key to reducing costs and increasing efficiency and achieving economies of scale in exploration and development.
Fourth, the depth of conventional oil and gas exploration continues to increase; shale oil and gas exploration has made breakthrough progress in continental, normal pressure and complex structural areas
Conventional oil and gas exploration has achieved a number of major breakthroughs in new areas and new formations in large oil and gas-bearing basins such as Tarim, Junggar, Sichuan, Pearl River Estuary and Songliao. Well Luntan 1 in the Tarim Basin produced 134 tons of oil and 45,900 cubic meters of gas per day in the Cambrian subsalt at a depth of 8,200 meters, breaking through the “death line” of 8,000-meter ultra-deep oil exploration for the first time in geological theory; With a depth of 7,600 meters, the high-yield oil and gas flow of 624 tons of oil and 370,000 cubic meters of gas per day has been obtained, and the Fuman block has achieved large-scale reserves of 100 million tons; the Shunbei 57X and Shunbei 71X wells in the new area of the Shunbei area have made major breakthroughs, which are the first and only part of the Shunbei Oilfield. The implementation of the 1 billion ton resource position has laid the foundation. A breakthrough was made in the risk exploration well Kangtan 1 in the Fukang sag of the Junggar Basin, and a large-scale oil area of more than 500 million tons is expected to form in the eastern part of the basin. It shows a new pattern of “hydrocarbon progress” in the basin-scale increase of reserves. Wells Pengtan 1 and Jiaotan 1 on the northern slope of the central Sichuan paleo-uplift in the Sichuan Basin have made major strategic breakthroughs in natural gas exploration in the Sinian-Cambrian, and are expected to form the second trillion cubic gas region in the Sichuan Basin; A major breakthrough was made in risk exploration in Well Pingqiao 1, which opened up a new field of marine exploration in the eastern Sichuan Basin. The Huizhou 26-6 structure in the Pearl River Mouth Basin made the largest self-operated exploration discovery in the Huizhou area in the natural gas exploration of the Paleogene-paleo buried hill and shallow water area, creating a new field of “double ancient” exploration.
In terms of unconventional oil and gas exploration, Guyeyouping 1 well in the northern Songliao Basin produced 38.1 cubic meters of oil and 13,000 cubic meters of gas per day in Qing 1st member, and the first 1HF well in Yingye 1HF produced 36.1 cubic meters of oil and 4,416 cubic meters of gas per day. A major strategic breakthrough has been made in the exploration of facies shale oil, which is expected to become an important strategic resource for the construction of Daqing’s century-old oilfield. Well Fuye 10HF in the Fuxing area of southeastern Sichuan Basin obtained industrial oil and gas with a daily gas production of 55,800 cubic meters and an oil output of 17.6 cubic meters in Jurassic Dongyuemiao, achieving a major breakthrough in the exploration of new Jurassic continental shale oil and gas fields; Well Longye 3HF in the Wufeng-Longmaxi Formation has a daily gas production of 72,000 cubic meters, achieving a major breakthrough in the exploration of new normal-pressure shale gas zones; Well Zhenye 1HF in the true syncline of the Southeastern Sichuan Basin is in the normal-pressure formation of the Wufeng-Longmaxi Formation. The daily gas production was 74,900 cubic meters, achieving an important breakthrough in shale gas exploration in the new area of the complex structural area of the basin margin.
V. Theoretical innovation and technological progress of oil and gas exploration and production have promoted the double growth of oil and gas reserves and production
The innovation of exploration theory and technological progress are important guarantees for the continuous discovery of new discoveries in oil and gas exploration. The innovation of risk exploration and evaluation technology has led to strategic breakthroughs in oil and gas exploration, and effectively guided the exploration of Manshen 1, Luuntan 1, Pengtan 1, Jiaotan 1, Hutan 1, Kangtan 1 and other wells to achieve major breakthroughs; ultra-deep fault-karst bodies New theoretical understandings such as accumulation models lead and guide new breakthroughs in oil and gas exploration in Shunbei, Fuman and other areas; the theory of large-area, high-abundance shale gas enrichment has guided the formation of a trillion-cubic-meter gas region in southern Sichuan; the first successful development in China Three-dimensional induction imaging logging tools and supporting processing technology have been developed to achieve a breakthrough in the evaluation of anisotropic reservoirs; the single-point high-density seismic geophysical exploration technology has been continuously improved, promoted and applied to achieve high-quality and high-efficiency effects, and the “four-lift” drilling engineering technology is strongly supported. New breakthroughs have been made in oil and gas exploration. The breakthrough progress of ultra-deep well drilling and ultra-high temperature directional engineering technology has achieved remarkable results in ultra-deep well drilling in the Shunbei oil and gas field; the geological theory innovation in the old exploration area in the southern Bohai Sea has effectively guided Kenli 6-1, Bozhong 29-6, Bohai Zhong 36-1 and other large and medium-sized oilfields were discovered; the “double ancient” exploration theory and technological innovation in Southwest Huizhou guided the major oil and gas discoveries in Huizhou 26-6 new field; the high-efficiency exploration technology in faulted basins guided the discovery of high-quality reserves in the high-mature exploration area of the Beibu Gulf ; The new geological understanding and engineering technology innovation have guided the breakthrough in the single well production of continental shale gas in the Ordos Basin; the application of the fine-spot characterization technology has provided theoretical support for the quality and efficiency improvement of tight gas in the eastern margin of Ordos.
Innovations in extraction technology have contributed to the efficient development of oil and gas fields. Nano flooding technology helps Changqing Oilfield low-permeability/ultra-low permeability old reservoirs tap potential to reduce costs and increase oil; three-dimensional large-platform horizontal well drilling technology boosts the large-scale development of shale oil in Qingcheng; special drilling technology for the development of different types of oil and gas fields Assisted the development of shale gas, tight sandstone gas and other oil and gas fields to improve quality, reduce cost and increase efficiency; the innovation of fracturing technology effectively supported the efficient and stable production of Fuling shale gas and tight gas in North China; the key technology innovation for efficient development of offshore complex fluvial oilfields Guarantee the continuous stable production and high-efficiency development of Bohai Oilfield; technological breakthroughs in the efficient development of medium-deep low-permeability gas reservoirs have promoted the increase of reserves and production of low-permeability gas fields in the Huangyan area of Xihu Sag; comprehensive reservoir evaluation technology has achieved good results in the productivity construction of Yan’an gas field; coal seams The innovation of the gas well drainage system and the technology of stimulation measures help to improve the quality and efficiency of Shizhuangbei coalbed methane development.
Six, oil and gas resources management is standardized and orderly, management reform has made substantial progress
Implement the spirit of the CPC Central Committee and the State Council on deepening the reform of the oil and gas system and vigorously enhancing the strength of oil and gas exploration and development, and implement the “Opinions of the Ministry of Natural Resources on Several Matters for Promoting the Reform of Mineral Resources Management (Trial)” (Natural Resources Regulations [2019] 7 No.), it is clear that the prospecting right holder finds that the oil and gas resources that can be exploited can be reported through the website of the natural resources department, and the boundary scope of the “same basin” can be deducted from each other. Guiding the Shanxi Natural Resources Department to formulate the administrative measures for coalbed methane exploration and exploitation in Shanxi Province, the pilot work plan for the comprehensive development of the “three natural gas” and other reform pilot work.
Continue to promote the competitive assignment of oil and gas exploration blocks, organize the compilation of “Requirements for Assignment of Oil and Gas and Mineral Exploration Rights (Trial)”, which regulates the setting conditions, classification standards, geological data list requirements, and basic information sheets of blocks for oil and gas exploration rights standard requirements. Six shale gas blocks in Guizhou Province were screened out to carry out pilot projects for the competitive assignment of oil and gas mining rights. Continue to promote the construction of demonstration zones for oil and gas exploration and exploitation, actively promote the exploration and exploitation of shale gas in southern Sichuan, northern Guizhou, western Hubei and other places, study the sale of shale gas blocks in Hubei Province, etc. facies shale oil development demonstration area.