The basins in the central region mainly include Qinshui Basin, Ordos Basin, Sichuan Basin, Datong Basin, Ningwu Basin and Yinshan Basin. Most CBM enrichment areas are located in or near economically developed areas. For example, Qinshui basin is rich in coalbed methane resources. In the south of Shanxi, the economy is developed and the transportation is convenient. In the eastern part of Ordos, there is a west-to-east gas pipeline passing through the coalbed methane enrichment area; The south of Ordos is close to Xi 'an, the capital of Shaanxi, the largest city in the west; Sichuan basin has a large population and developed economy. According to the actual situation of dense population and developed industry in Central China, the utilization prospect of coalbed methane in this area is broad. The following aspects can be considered in the utilization of coalbed methane resources in this area.
(1) Civil use of coalbed methane
At present, there is a certain output of coalbed methane in Qinshui Basin, which is supplied to urban residents in Qinshui, Gaoping and Lingchuan counties (cities) under the current situation of small gas production and unstable output. The comprehensive development and utilization project of coalbed methane in Jincheng is to use the coalbed methane transported by some coal mines in Yangcheng and Qinshui to Jincheng city and some counties and districts, as well as the compressed coalbed methane transported by Shanxi Energy Industry Group Co., Ltd. and Jinmei Group as gas sources to build a city gas pipeline network in six counties (cities, districts) of Jincheng for industrial and civil use. The construction period of this project is 3 years, from 2005 to 2008. In 2006, urban residents immediately used coalbed methane.
The southern edge of Ordos Basin is close to Xi City, and the total number of residents in the vicinity of coalbed methane resources/kloc-0 exceeds 28 million. Xi 'an natural gas pipeline has formed the city's natural gas pipeline network. Moreover, there are already considerable natural gas pipeline networks in other areas, and the produced coalbed methane can be directly input into the pipeline for civilian use.
Sichuan Basin is densely populated, and there is a great demand for civil natural gas. At present, Chongqing's natural gas supply is facing a crisis. Although Chongqing is the largest natural gas producing area in China, with an annual output of 64× 108m3, accounting for about 1/5 of the total national output, the contradiction between supply and demand of natural gas in Chongqing has become very prominent. The main reason for the gas crisis is that the amount of natural gas provided by PetroChina to Chongqing cannot meet the demand. Although Chongqing has taken the initiative to cut down key gas consumption projects for many times, the total demand of natural gas in Chongqing in 2007 did not exceed 45× 108m3. However, after many negotiations, the agreement reached between Chongqing and PetroChina was only that PetroChina promised to increase the gas consumption by 3.3× 108m3 every year on the basis of 29.8× 108m3 in 2004, that is, to provide Chongqing with 40× 108m3 natural gas in 2007. However, for key gas projects, the demand for natural gas is still short. At the same time, the lack of gas has had a certain impact on Chongqing's economic development. Some enterprises in urgent need of gas have to limit production or stop production. At the same time, coalbed methane can be used as fuel for automobiles. By the end of 2000, there were more than 90 CNG filling stations and 24,080 CNG vehicles in Sichuan and Chongqing, 7.5 times of the 3,204 vehicles at the end of 1998. In 2006, 5438+0, 45 CNG filling stations/KLOC-0 were built, and 36,833 vehicles were modified, including 28 vehicles from Sichuan/KLOC-0, and 34,333 vehicles were modified; There are 17 cars in Chongqing, and a total of 2500 cars have been changed. The CNG industry has entered the track of rapid development. There are only about 165438+ more than one million vehicles in Sichuan and Chongqing. Taxis, buses (including buses), sanitation vehicles and official vehicles can be modified with CNG. Chongqing plans to build 450 CNG filling stations and 90,000 CNG vehicles by 20 10; Sichuan province plans to build 300 CNG filling stations by 20 10 and replace 654.38+million vehicles. If CNG vehicles can be combined with automobile manufacturing, they will certainly develop faster.
Datong has a long winter, and residents need to consume a lot of coal for heating, which will also cause air pollution. Using coalbed methane for heating can not only solve the problem of air pollution and reduce waste residue discharge, but also make full use of the high thermal efficiency of coalbed methane to serve residents' lives. In June, 2005, 165438+ 10, the Jinshatan-Datong natural gas long-distance pipeline, which had been built for nearly two years, was fully connected, and the trunk line, trunk line around the city and most branch lines of the natural gas supply network project were also completed. The whole natural gas utilization project was ignited and ventilated on the 24th. Jinshatan-Datong gas pipeline is an important part of Shanxi natural gas (coalbed methane) pipeline network planning, and it is also another provincial natural gas pipeline after Linfen-Hejin and Yuxian-Yangquan natural gas pipelines are put into operation. After the second phase of 20 10 project is completed, clean and efficient natural gas will be used in eastern Henan, mining areas and urban areas, which will provide opportunities for the development of coalbed methane in Datong, so that the produced coalbed methane can be directly imported into natural gas pipelines.
(2) Coal bed methane power generation
In Qinshui basin, 1 1MW coal-bed gas power plant is built by using the existing coal-bed gas drainage capacity of No.3 Mine and Xinjing Mine of Yangquan Coal Industry Group for mine self-use. During the construction period of this project 1 year, the total investment is 64.6 million yuan (US$ 7.78 million), and the annual power supply is 7326×104 kW h. 35% of the total investment of this project is provided by Yangquan Coal Industry Group, and the remaining 65% is solved by loans from financial institutions or foreign capital. Preliminary economic analysis shows that the net present value of the project is 6,543,804,950 yuan (US$ 6,543,800,000 yuan), the internal rate of return is 23%, and the payback period is 7 years. Yangquan Coal Industry Group plans to start construction at the end of 2002 and put into production at the end of 2003.
Ordos basin is rich in coal resources and there are many thermal power plants, such as Hancheng Power Plant, Xi 'an Nanjiao Thermal Power Plant and Tongchuan Power Plant. These areas already have the foundation for large-scale thermal power generation. Obviously, it is easier to develop power generation by using natural gas and coal, which is one of the important ways to utilize coalbed methane in Ordos Basin.
Datong is an important power production base in North China. The total installed capacity of the city's power industry is138×104 kW h. Shentou No.1 and No.2 Power Plants, Datong No.2 Power Plants and Fengzhen Power Plants in Datong Triangle Area form the largest power transmission and transformation network in China, supplying power to Beijing, Tianjin and Tangshan areas. The annual power transmission of Xiang Jing in Jintang area exceeds 60×108 kw h, and it undertakes the power supply of the capital14, realizing the strategic plan of the national power moving eastward. Datong electric power production has a good development foundation, and there are still various resource conditions for the continued construction of thermal power plants in China. Using coalbed methane to generate electricity can provide lower-cost power resources for the eastern region.
(3) Coal bed methane industrial fuel and raw materials
The coalbed methane produced in the southern margin of Ordos can be directly transported to Xi 'an for further processing. After decades of development, Xi 'an has formed a relatively complete industrial system with mechanical equipment, transportation, electronic information, aerospace, biomedicine, food and beverage, and petrochemical industry as the main categories, and has become an important complete set of medium and high voltage power transmission and transformation equipment in China. There are 46,243 industrial enterprises in the city with total assets of 65.438+005.436 billion yuan, of which the net assets of municipal industrial enterprises are about 49.942 billion yuan. Coalbed methane can be used as raw materials for chemical and pharmaceutical industries, as well as synthetic fertilizers and methanol in this area.
The terminal consumption price level of natural gas in Sichuan Basin is lower than the national level. It is this kind of natural gas with high quality and low price that has successfully transformed many local enterprises that are temporarily in difficulty. Because of its low price and good temperament, natural gas can produce high-quality products, attracting many foreign enterprises with natural gas as raw material fuel to enter Sichuan to carry out business. These enterprises are involved in electronics, light industry, ceramics, IT and other industries, which have promoted the development of the mainland economy. For example, ceramic production bases have been formed along Meishan-Jiajiang-Leshan in Sichuan Basin, and most of these enterprises are from Guangdong Province. However, due to the relative shortage of natural gas, the fuel problem of these enterprises has become the main problem that restricts the development of enterprises and increases economic benefits, which provides a broad market prospect and application prospect for the utilization of coalbed methane.
Datong's main industries are coal mine, machinery, building materials, chemistry, electricity and grain processing. Datong Mining Bureau's annual output of raw coal exceeds 2700× 104t, accounting for 3/4 of the city's annual output of raw coal, ranking first in the country. In addition, Shanxi Diesel Engine Factory, Datong Cement Factory and Datong Locomotive Factory are all backbone industries with large scale and high degree of mechanization. The fuel used by these industrial enterprises is mainly coal, which brings a lot of pollution sources to Datong and its surrounding areas. The development and utilization of coalbed methane in Datong can be directly provided to these enterprises as fuel through coalbed methane utilization pipelines.
Second, the western region of coalbed methane utilization potential analysis
The main basins in the western region are Junggar basin, Tianshan basin (group), Tarim basin, Qaidam basin, Turpan-Hami basin and Santanghu basin. Among them, the most favorable target area for coalbed methane exploration in the southern margin of Junggar Basin is adjacent to Urumqi. There is Hami City in the west and Turpan City in the south of Turpan Basin, with a relatively dense population. But on the whole, the population in the west is relatively sparse and the industry is relatively backward. Therefore, the utilization of coalbed methane in the west is mainly export, followed by power generation and civil use.
(a) transported to economically developed areas through pipelines or transportation networks.
With the strategic adjustment of energy structure, the state has implemented the plan of "supplementing oil with gas" to develop and utilize natural gas on a large scale. At the same time, the State Economic and Trade Commission also proposed to make major adjustments to the industrial structure in the northwest region. The first of the three major adjustment ideas is to concentrate on supporting the oil and gas industry and chemical industry, and accelerate the exploration and development of natural gas (coalbed methane) in Tarim, Junggar, Turpan-Hami and Qaidam basins. In order to solve the contradiction between resources and market segmentation, the country has started a large-scale natural gas pipeline network construction, especially the completion of the pipeline network construction project of "West-to-East Gas Transmission" and the construction of the second phase of "West-to-East Gas Transmission".
Coalbed methane produced in the west can supply gas to Shanghai and other provinces and cities along the route. At present, the output of Kela 2 gas field and Yaha gas field basically meets the current demand of west-to-east gas transmission. However, with the growth of national economy, the demand for natural gas in nine cities such as Shanghai is increasing, which poses new challenges to the development of natural gas. The exploration, development and utilization of coalbed methane will supplement the relative shortage of natural gas and improve the gas supply guarantee required by the nine cities.
(two) to carry out the combination of local natural gas power generation and export power generation
Using the abundant natural gas resources and coalbed methane resources in Tarim area, we will build a natural gas power plant in the local area, and use the idea of "west-to-east gas transmission" for reference to build a transmission pipeline, and sell the electricity from the power plant to nearby enterprises or as civil electricity in nearby cities. The produced natural gas and coalbed methane can also be directly transported to natural gas development co., ltd. and natural gas power plants through gas pipelines to provide fuel for the power generation industry in developed areas.
The fuel used by heating enterprises in Urumqi is relatively simple, and the main fuel is raw coal. The air pollution in typical cities in the north has the characteristics of soot pollution. The main pollutant in the air is total suspended particles. Air pollution in winter and spring is more serious than that in summer and autumn, and heating period is more important than non-heating period. Therefore, we must change the status quo as soon as possible and adopt various clean energy sources such as coalbed methane and natural gas to help improve the urban atmospheric environment. In the aspect of changing oil to gas, Urumqi bus company has achieved certain results. In 2006, 5438+0 has been put into use 1 164 natural gas vehicles, and the annual natural gas consumption is 1272× 104m3. In addition, 2,800 minibuses and taxis have been modified with liquefied petroleum gas, with an annual consumption of18291t. By 2005, 22,500 gas vehicles will be rebuilt, with an annual supply of 7,200×104m3 of compressed natural gas and 8.64× 104t of liquefied petroleum gas. By reducing the dependence on gasoline fuel and reducing the pressure on oil demand, it is of great strategic significance to ensure energy security and protect the atmospheric environment in this area.
The utilization of coalbed methane in You Xiang area on the northern edge of Qaidam Basin can also be transported by power generation. You Xiang CBM power generation project can be built in You Xiang area. You Xiang, located in the northwest of Qaidam Basin, belongs to the key areas of Mahai, Dachaidan, Xitieshan, Lvcaoshan, Qinjianshan, Lenghu and Sebei Industrial Development Zones. The industry in this area is relatively developed and there are many coal mines. It is suggested that coal mining and gas production should be integrated in the development of coalbed methane in this area. After power generation, it can supply power to the nearby western industrial development zone, and it can be connected to the 330 kV power transmission and transformation network in Wulan-Golmud, Qinghai.
Three, the eastern region of coalbed methane utilization potential analysis
The main basins in the eastern region are Erlian basin, Hailaer basin and Sanjiang-Muling River basin. Among them, the cities in Huolinhe area around Erlian Basin are relatively developed, with relatively dense population, close to the three northeastern provinces, and the chemical and pharmaceutical industries are relatively developed. Compared with Erlian Basin, Huhehu and Zhalainuoer areas in Hailaer Basin are sparsely populated, and the shallow coal resources of Huhehu and Zhalainuoer have been developed and utilized, and the supply of local energy resources exceeds demand. Therefore, the utilization prospect of coalbed methane in these two areas is different. But in general, the coalbed methane in Huolinhe area is mainly used for local civil use and power generation, while the coalbed methane in Hailaer Basin is mainly transported to economically developed areas.
(1) Civil use of coalbed methane
The downstream conditions of Huolinhe area are generally good, close to Wulanhaote City, Holingol City, Baicheng City and Tongliao City. Among them, Wulanhaote has a total population of 290,000, with highways and railways extending in all directions, and11national highway, national highway 302 and inter-provincial passages running through the whole territory. This railway has opened direct passenger and tourist trains to Beijing, Changchun, Harbin and other big cities. Holingol is a new grassland coal city directly under the jurisdiction of Inner Mongolia Autonomous Region. It now administers 1 Sumu, 1 town, 3 sub-district offices and 12 Gacha village. There are 17 ethnic groups in the city, including Han, Mongolian, Hui and Manchu, with a total population of 70,000. The total population of Baicheng is 3 13662, including urban population 14788 1 and rural population 16578 1. There is a large population nearby, and now the civil fuel is mainly coal, which is seriously polluted. If coalbed methane is used as civil gas, it can not only reduce the pollution caused by coal combustion, but also reduce the potential safety hazard caused by coal mine gas.
(2) Coal bed methane power generation
Coal-fired thermal power plants have been established in Huolinhe area, and China Power Investment Corporation and Huolinhe Coal Industry Group Corporation are cooperating to build Kengkou Power Plant. There is already a strong thermal power generation foundation in this area, and it is easy to build a coalbed methane power station. Moreover, electric energy can be directly input into the Northeast Power Grid, which can alleviate the transmission pressure of the main power grids in Jilin and Liaoning provinces.
There are three central heating sources in Hailaer area, namely Hailaer Thermal Power Plant, Hailaer East Thermal Power Plant and Nanjiao Branch of Hailaer Thermal Power Plant. The central heating area is 4 15.5× 104 m2. In 2009, East Hailaer Power Plant expanded two 50MW units, and the heating load increased by 208× 104m2. At the same time, a heating network pipeline with a length of 14.7km and a diameter of 920mm will be laid, and a 14 heat exchange station will be built along the way to ensure heating for new and old users. The coalbed methane resources in this area can be used for power generation or as one of heating fuels for trial use. In terms of coal-electricity integration construction, the first-phase power generation of Yimin Coal-electricity Company in Hulunbeier City is sold about 50×108 kW h through the northeast power grid, and the second-phase 2×600MW and third-phase 4×600MW units of Yimin Coal-electricity Company and the 4×600MW units of Baorixile Power Plant are also exported through the northeast power grid. Therefore, while striving for the support of Northeast Power Grid Corporation and ensuring the synchronous construction of power plants and transmission lines, it is an important link to develop clean and alternative coalbed methane resources to supplement or optimize power generation fuel, which is to accelerate the transformation of resource advantages to economic advantages in this region.
Four. Analysis on Utilization Potential of Coalbed Methane in South China
The main basins in southern China are East Yunnan, West Guizhou and Heping Le Basin. Among them, eastern Yunnan and western Guizhou are rich in coalbed methane resources, which is one of the most favorable exploration areas in South China. The downstream conditions in this area are generally good, close to large and medium-sized cities. There are more than 20 large and medium-sized cities with a population of over 300,000, with a total population of nearly 60 million. In 20 10 year, the demand for natural gas in this area will reach 230× 108m3. Jiangxi province, where Pingle basin is located, is in serious energy shortage. Since the 1980s, coal has been transferred from the province to the outside. The growth of energy output is incompatible with the development of national economy, which has become a prominent contradiction restricting the further development of Jiangxi national economy. Local governments are very enthusiastic about using gas. According to the characteristics of energy shortage in southern China, the utilization of coalbed methane in this area is mainly comprehensive processing, civil use and power generation.
(1) Comprehensive processing industry of coalbed methane
With the rapid economic development in eastern Yunnan and western Guizhou, the demand for methanol will continue to grow at a high speed. The methanol production capacity in eastern Yunnan and western Guizhou is about 20× 104t/a, of which 12% is mainly conventional natural gas, and the coalbed methane is almost zero, which provides a broad development space for the utilization of coalbed methane.
Jiangxi has established many industrial systems such as automobiles, machinery, electronics, chemicals, metallurgy, building materials, food, textiles, medicine and so on. A number of industrial enterprises and advantageous industries have developed rapidly and become the leading force of the national economy. Fengcheng is a rich area of coalbed methane in Pingle basin, only 60 kilometers away from Nanchang, and the comprehensive processing industry of coalbed methane has broad prospects.
(2) Civil use of coalbed methane
The Urban Gas Development Plan of Guizhou Province divides the whole province into four regions and 8/kloc-0 gasification zones to develop gas. The central part is a natural gas gasification area, and it is planned to introduce Sichuan-Chongqing natural gas. Hejiang Station is selected as the entrance of the South Sichuan-Chongqing Line, passing through Chishui, Renhuai, Zunyi and Guiyang, and extending to Anshun, Kaili and Duyun, forming a "one horizontal and one vertical" gas transmission pattern. Construction began in 2003 with a capacity of 20 18. The east and south are liquefied gas gasification areas, and it is planned to introduce liquefied gas from outside the province, with liquefied gas as the leading gas source, and strictly control coal to gas, covering 48 cities and counties; The west is a controlled gasification area for coal-based gas, which will make full use of local coal resources, take coal-based gas as possible or priority gas source, and take liquefied gas as supplementary gas source, and cover 17 counties and cities without excluding other gas sources; Make full use of the underground gas drainage system in Liuzhi Special Zone coal mine, develop the mine gas in Liuzhi Special Zone, and use liquefied gas as supplementary gas source to become an independent gasification area. The plan puts forward that when the local natural gas (including coalbed methane) resources are mature, the western and southern regions will be used as gasification areas near natural gas supply, which will be connected with the central natural gas pipeline in the future, and gas supply to Yunnan and Guangdong and Guangxi will be considered.
According to the statistics of population change sampling survey, the total population of Jiangxi Province where Pingle Basin is located is 41857,700. Among them, the urban population is 6.5438+0.27289 million, accounting for 30.4%; The rural population is 29 128800, accounting for 69.6%. There is a great demand for civil fuel, with coal as the main fuel. Now some cities in Jiangxi have laid natural gas pipelines, such as Ganzhou, and the largest natural gas pipeline system in Jiangxi was built in June 2005. In this way, the coalbed methane produced from Fengcheng can be directly input into the natural gas pipeline system, so civil use is an important way to utilize coalbed methane.
(3) Coal bed methane power generation
Natural gas power generation is one of the important ways to utilize coalbed methane in eastern Yunnan and western Guizhou. Guizhou Shuicheng Mining (Group) Co., Ltd. uses scientific and technological means to develop coalbed methane resources, turn waste into treasure, and use coalbed methane to generate electricity, thus forming a virtuous cycle new situation of "promoting pumping with use and promoting safety with pumping" and promoting ecological construction with power generation, effectively curbing serious safety accidents. In 2003, Shuikuang Group introduced natural gas generator sets from Shengli Oilfield, and made full use of the coalbed methane resources discharged into the atmosphere in the past to generate electricity, which achieved good social and economic benefits. The 6×500kW coalbed methane power plant in Dawan Coal Mine, which was built in the first phase of Shuikuang Group, became the first coalbed methane power plant in Guizhou Province. The coal-bed methane generator set is 22×500kW, and its capacity is 1. 1× 104kW. The actual operating power of each unit is about 400kW, and it can supply power 15× 65438 every day. The investment of a coal-bed methane generator set is about/kloc-0.0 million yuan, and each generator set can run continuously with an output power of 400kW, which can run for 250 ~ 300 days every year. The generated electricity is used by the mining area, and the cost per kWh is only 0.08 ~ 0. 10 yuan, and the payback period is 2 years.