Ministry of Natural Resources: Proven oil and gas reserves stopped falling and rebounded, adding 0.1 billion tons of oil fields last year.
On July 15, the website of the Ministry of Natural Resources released the National Bulletin on the Exploration and Exploitation of Oil and Gas Resources (2018). The briefing shows that in 2018, international oil prices fluctuated widely higher and the oil and gas industry rebounded. Investment in the exploration and exploitation of oil and gas resources across the country continued to pick up, and the physical workload grew rapidly. Oil and gas exploration and discovery momentum is good, oil and gas proven reserves stopped falling and rebounded, adding 0.1 billion tons of oil fields, three hundred billion square gas fields, one hundred billion square shale gas field. Oil and gas exploitation showed a trend of "steady oil and gas rise", oil production remained basically stable, and natural gas production increased rapidly. The reform of the management system for oil and gas exploration and exploitation has been steadily advanced, and important progress has been made in oil and gas geological surveys.
1. oil and gas exploration and exploitation investment continued to rise
In 2018, the national investment in oil and gas exploration and exploitation (including oil, natural gas, shale gas, coalbed methane and natural gas hydrate) was 63.658 billion yuan and 203.106 billion yuan respectively, up 8.9 and 24.7 percent year-on-year; two-dimensional seismic 44000 kilometers were collected, up 13.5 percent year-on-year, and three-dimensional seismic 34000 square kilometers, up 3.3 percent year-on-year; 2955 exploration wells and 21107 development wells were completed, up 8.4 and 2.0 percent respectively.
2.'s new proven oil and gas reserves stop falling and rebound
In 2018, oil added 0.959 billion tons of proven geological reserves, an increase of 9.4 percent over the same period last year, and increased again after two consecutive years of decline. Among them, there are 3 basins with newly-added proven reserves of more than 0.1 billion tons, namely the Ordos Basin, the Bohai Bay Basin (onshore) and the Junggar Basin; there is 1 oilfield with newly-added proven reserves of more than 0.1 billion tons, which is the Ordos Basin. Heshui Oilfield.
The proven geological reserves of natural gas were 831.157 billion cubic meters, up 49.7 percent year on year. Among them, there are 2 basins with new proven reserves of more than 100 billion cubic meters, namely Ordos Basin and Tarim Basin. There are 3 new gas fields with proven reserves of more than 100 billion cubic meters, namely Sulige gas field and Mizhi gas field in Ordos Basin and Crasu gas field in Tarim Basin.
3. oil and gas production increased steadily
In 2018, the national oil production was 0.189 billion tons, down 1.2 percent year-on-year. Basins with an output of more than 10 million tons include Bohai Bay (including sea areas), Songliao, Ordos, Junggar, Tarim and Pearl River Mouth basins, totaling 0.176 billion tons, accounting for 92.8 percent of the country's total.
The country's natural gas output was 141.512 billion cubic meters, up 6.4 percent year-on-year. Among them, the basins with an output of more than 3 billion cubic meters are Ordos, Sichuan, Tarim, Qaidam, Songliao and Pearl River Mouth basins, totaling 126.346 billion cubic meters, accounting for 89.3 percent of the national total.
By the end of 2018, 1027 oil and gas fields (including 746 oil fields and 281 natural gas fields), 5 shale gas fields, 24 coalbed methane fields and 3 carbon dioxide gas fields had been proven nationwide. It has produced 6.952 billion tons of oil and 2.07 trillion cubic meters of natural gas.
Important progress has been made in the basic geological work of oil and gas in 4.
A breakthrough has been made in the investigation of natural gas hydrate resources in the new area of the northern South China Sea, and preparations for the second trial production of natural gas hydrate in the Shenhu area of the northern South China Sea have progressed smoothly. Shale gas regulation in the Yangtze River Economic Belt has found a major breakthrough, and the 2HF well in the Sinian system is a breakthrough, expanding the new field of shale gas exploration and development. Important progress has been made in continental shale oil in the Songliao Basin. Important progress has been made in the oil and gas survey of the new strata in the new zone of the Bogda Mountain front belt in the Yin'e Basin, the Qaidam Basin and the Junggar Basin. Well Chuan Gaoshen 2 in Yibin area of southern Sichuan obtains coalbed methane industrial gas flow.
"13th Five-Year" national oil and gas resources evaluation in full swing. The key evaluation parameters of tight oil and gas, shale gas, coalbed methane and other resources were studied. For the first time, the economic evaluation of oil and gas resources and the risk assessment of the ecological environment of oil and gas resources were carried out, and the evaluation of oil and gas resources was carried out for the first time for the deep land area.
5. regular oil and gas exploration has made many breakthroughs in new areas, new areas and new layers.
A major breakthrough has been made in the risk exploration of Well Mid-Autumn Festival 1 in the Qiulitag structural zone of Tarim Basin. A new 100 billion square meter self-contained gas field has been discovered, providing a resource base for the construction of a 30 million-ton large oil and gas field in Tarim. The Ordovician in Shunbei region has a predicted oil reserve of 71.76 million tons, and the exploration results of Shunbei fault zone have expanded from west to south to deep. The evaluation of Bozhong Sag in Bohai Sea has implemented Bozhong 19-6, the largest self-contained 100 billion cubic meter condensate gas field in eastern China, providing strong support for the stable production of 30 million tons of Bohai Oilfield and reaching a new level. The successful discovery of a billion-ton oil field-Bozhong 29-6 in the high mature area of Bozhong Sag has injected power into the sustainable development of the old oil region. Shale oil exploration in Cangdong Sag of Bohai Bay Basin has been discovered, presenting a 50 million tons. The Lower Wuerhe Formation in the Mahu 1 well area of the Junggar Basin has detected industrial oil flow, with a predicted increase of 0.149 billion tons of oil reserves; the Upper Wuerhe Formation of the Permian in the Shawan Depression has been significantly discovered in oil exploration, which is expected to form a large-scale oil and gas enrichment area in the Mahu-Shawan Depression. Well Yuanba 7 in Yuanba area, Sichuan Basin, was the first to explore high-yield gas reservoirs in the Permian Maokou Formation, with an additional predicted natural gas reserve of 152.7 billion cubic meters. Well Yongtan 1 in western Sichuan has detected high-yield gas flow in the Permian, opening up a new field of volcanic rock exploration. The discovery of the Jilantai Oilfield in the Linhe Depression of the Hetao Basin has added 0.12 billion tons of predicted oil reserves, breaking through the situation that the basin has been unconquered for more than 40 years. The Ledong District of the Yinggehai Basin has discovered ultra-high temperature and high pressure natural gas with a gas layer of more than 100 meters, with reserves of 100 billion cubic meters, and is expected to become a new position for increasing storage and production in the field of ultra-high temperature and high pressure. The Lufeng sag in the Pearl River Mouth Basin has been explored for a self-contained high-yield oil field, which is the largest foreign cooperative commercial oil field discovery in the past 10 years.
6. shale gas and coalbed methane exploration and development are progressing smoothly
In 2018, the national shale gas exploration and development invested 13.53 billion yuan, drilling 40 exploration wells and 285 development wells. The proven geological reserves of shale gas were 124.678 billion cubic meters, down 66.2 percent from the previous year, and the new reserves came from Sinopec's Weirong shale gas field in the Sichuan Basin. The national shale gas production was 10.881 billion cubic meters, an increase of 21.0 percent over the previous year. A major breakthrough has been made in shale gas exploration on the Jinfo Slope in Nanchuan area in the eastern Sichuan Basin, with 196.5 billion cubic meters of shale gas geological resources implemented, laying a resource foundation for the third phase of Fuling shale gas field construction.
In 2018, 3.925 billion yuan was invested in coalbed methane exploration and development nationwide, with 152 wells drilled and 779 development wells. The proven geological reserves of coalbed methane were 14.708 billion cubic meters, an increase of 40.3 percent over the same period last year, and the output of coalbed methane developed on the ground was 5.15 billion cubic meters, an increase of 9.5 percent over the same period last year.
Advances in 7. Oil and Gas Exploration Theory and Technology
The progress of exploration theory and technology is an important guarantee for the continuous discovery of oil and gas exploration. Important progress has been made in the research of key technologies for continental shale oil exploration, which has effectively guided and promoted the exploration breakthroughs and large-scale production of continental shale oil such as Jimusar in Junggar Basin and Cangdong Sag in Bohai Bay Basin. A new generation of seismic technology featuring "single point high density" has been implemented for complex subtle oil and gas reservoirs in the eastern faulted basin, effectively widening the frequency band and improving seismic resolution; the key technology of offshore deep seismic exploration has been comprehensively popularized and applied in the secondary three-dimensional seismic exploration in the sea area, and the largest integrated Bozhong 19-6 condensate gas field in eastern China has been discovered under the guidance of the exploration theory and technology of the deep integrated condensate gas field in the Bohai Sea.
The innovation of mining technology has promoted the efficient development of oil and gas fields. The technical support of gravity miscible flooding with natural gas injection to improve oil recovery leads the construction of Tarim 30 million-ton large oil and gas field and the improvement of oil recovery in old oil fields. The technological achievements of alkali-free binary compound flooding have been industrialized in Liaohe, Xinjiang and other oilfields, with the recovery rate increasing by more than 18% year on year. 3800 meters of shallow shale gas fracturing technology is becoming more and more mature, and low-cost fracturing process tests have achieved phased results. A series of key technologies are formed, and it has been successfully practiced in the Dongfang Gas Field Group in Yinggehai Basin. The feasibility study of micro-fracturing and pressure-raising water injection for water injection wells has made progress and has been applied and implemented in Bohai Oilfield. Multi-scale comprehensive reservoir prediction technology has improved the drilling rate of tight gas reservoir, reaching more than 90% for straight wells and 82% for horizontal wells.
Exploration and Innovation of 8. Oil and Gas Resources Management Reform
Strengthen the management of oil and gas mining rights approval and registration. Strictly in accordance with the law, actively optimize services, strict block exit. As of the end of December 2018, there were 924 oil and gas (including coalbed methane and shale gas) prospecting rights, covering an area of 3.0946 million square kilometers; 774 mining rights, covering an area of 164900 square kilometers. Among them, there are 45 prospecting rights for foreign cooperation and 37 mining rights.
Implement the spirit of the Party Central Committee and the State Council on deepening the reform of the oil and gas system, study and deepen the reform of oil and gas exploration and exploitation management, liberalize the oil and gas exploration and exploitation market, compete for the transfer of oil and gas exploration rights, and increase the withdrawal of oil and gas exploration blocks. We will continue to promote the pilot reform of oil and gas exploration and exploitation in Xinjiang, and entrust Xinjiang to competitively transfer three oil and gas exploration blocks. Summarize the construction experience of Chongqing Fuling shale gas exploration and development demonstration base, and continue to promote the construction of Guizhou Qianbei shale gas comprehensive exploration test area and Sichuan southern Sichuan shale gas exploration and development test area. To carry out the sea oil and gas prospecting rights competition, listing the sale of Shanxi coalbed methane exploration blocks. (From China Energy Network)