Puguang Town, Xuanhan County, Dazhou City, Sichuan Province

Puguang town

Puguang town is located in the Midwest of Xuanhan County, Dazhou City, on the North Bank of Jiangkou Reservoir Area (the intersection of Zhonghe River and Houhe River), 20.2km away from the county. It covers an area of 83.47 square kilometers and has a population of 19985 (2017). Baotou Maoming Expressway (Datong Shaan Expressway), Dazhou Baisha highway and Puguang Laojun highway pass through. The Houhe river is navigable throughout the year. It has jurisdiction over 9 village committees and 3 neighborhood committees including evolution village, Longjing community, Shuangjiang community and tongkan community.

On June 12, 2020, Sichuan Provincial People's Government approved Dazhou to adjust the administrative divisions of some towns in Wanyuan City, Xuanhan county and Dazhu County (cfzm [2020] No. 8): the administrative areas of the original Shuanghe Town, the original Tuzhu town and the original Majia community, Liuping village, Shiyan village, Yanghe village and Guoping village in Liuchi town were put under the jurisdiction of Puguang town.

Evolution of organizational system

Puguang town was established in 1932, Puguang Township in 1941, Puguang commune (Qianfeng) in 1958, Puguang Township in 1984 and Puguang town in 2005.

In 2020, Shuanghe town and Tuzhu town will be abolished, and the administrative areas of Majia community, Liuping village, Shiyan village, Yanghe village and Guoping village of Shuanghe Town, Tuzhu town and Liuchi town will be put under the jurisdiction of Puguang Town, and the people's Government of Puguang town will be stationed at 58 Miaohe Street, Liaoyuan community.

Economic overview

Approved by the energy and Mineral Resources Committee of the Ministry of land and resources, Puguang gas field has proved natural gas reserves of 350 billion cubic meters, which is one of the largest gas fields in China. Seven wells have been drilled. According to the development plan, the annual commercial gas supply of Puguang gas field export pipeline is 4 billion cubic meters in 2008 and 8 billion cubic meters in 2010. Sinopec and CNPC are respectively exploring and developing natural gas and building natural gas purification plants in Xuanhan County, Dazhou City, Sichuan Province. Related supporting industries are booming.

Puguang Town township enterprises have grain and oil processing plants. Agricultural production of rice, wheat, rapeseed. Freshwater fish, pigs, cattle breeding.

There are grain and oil processing plants. Agricultural production of rice, wheat, rapeseed. Freshwater fish, pigs and cattle.

administrative division

It has jurisdiction over 9 village committees and 3 neighborhood committees, i.e. evolvable, Beidou, Taya, Qianhe, Xintan, douti, tongkan, Denglong, Zhixi, Bajiao, Shuangjiang and Longjing.

social undertakings

education

Puguang Town Central School in Xuanhan county is located in Luojiaba, a national key cultural relic protection unit, and Puguang town center on the confluence of Zhonghou river. It was built in the Jiaqing period of Qing Dynasty. After more than 100 years of historical evolution and development, it has gradually expanded. Now it covers an area of 16700 square meters, a building area of 5500 square meters, a green area of 6000 square meters, 21 teaching classes, more than 1000 students and 42 teachers . The school is the "advanced unit of moral education in primary and secondary schools" commended by the Propaganda Department of Sichuan provincial Party committee and the Provincial Department of education; the "civilized unit" commended by Dazhou Municipal Party committee and the municipal government; the "best health unit" commended by the municipal government; the "School spirit model school" commended by the Municipal Bureau of education; the "home of advanced workers" commended by the Municipal Education trade union; and the "qualified management according to law" commended by the Municipal Bureau of education and the Municipal Legal Affairs Office School; Xuanhan County commended the "advanced school", "safe and civilized community", "advanced school of campus environment construction", "work study advanced collective", "advanced grassroots party organization", "advanced unit of sports, art and health work", "sports base school", "women's meritorious demonstration post", etc.; over the years, the education quality and comprehensive evaluation are among the top in Qingxi district; teachers and students of the school are well received by the country More than 100 people were commended at home, province, city and county levels.

Gas pipeline construction

Puguang gas field export pipeline Sichuan East natural gas pipeline project starts from Puguang initial station in Northeast Sichuan in the West and ends in Shanghai in the East. It is another pipeline artery running through the East and west of China after the west east gas pipeline. The pipeline project includes one trunk line and six branch lines, involving six provinces and two cities of Sichuan, Chongqing, Hubei, Jiangxi, Anhui, Jiangsu, Zhejiang and Shanghai, with a total length of 1702km. The designed annual capacity of the trunk line is 12 billion cubic meters, the gas transmission pressure is 10MPa, and the pipe diameter is 1016mm. The special line of Dazhou natural gas energy and chemical industry zone has a total length of 81 km, a pipe diameter of 508 mm, a pressure of 8 MPa, and a gas transmission capacity of 3 billion cubic meters per year.

West to East Gas Pipeline

It's raining heavily in Puguang gas field. The staff of each gas gathering station in the gas production plant have increased the patrol times of devices and pipelines, and taken preventive measures to strictly prevent the adverse impact of heavy rain on gas field production. Since Puguang gas field was put into operation, the gas production plant has paid close attention to the production management, strengthened the implementation of various safety systems, carefully analyzed various problems in production, strengthened the efforts to tackle key technical problems, and timely adopted effective measures to ensure the safe and stable operation of the gathering and transportation system.

In order to ensure the orderly operation of production, the gas production plant has established and improved the production and operation system, formulated a series of production management systems, such as "production and operation management measures", "cadre on duty system", "high sulfur gas gathering station (pipeline) safety production management regulations", continuously improved the production and operation network and the responsibilities of organizations at all levels, and clarified the production management workflow, production operation and information The transmission process is further smooth; the production and operation management system with plant dispatching room as the information hub and central control room as the operation center is established, which is connected from top to bottom, close horizontally, centralized and unified, coordinated and efficient, with smooth information, clear responsibilities and powerful execution, basically meeting the needs of production and operation and emergency disposal of the gathering and transportation system. At the same time, the factory pays close attention to the production organization and management with the station as the center and the grass-roots team as the focus, and brings the outsourcing business such as line patrol and acid liquid incineration into the station management to form a regional management network.

Containment of pipeline corrosion is very important for the safe operation of high sulfur gas field. A perfect corrosion monitoring system has been set up in the plant. Corrosion coupon, resistance probe, linear polarization probe and electric fingerprint are used for real-time on-line corrosion monitoring. The data measured by the corrosion monitoring system is transmitted to the station control room or central control room through the network, which is convenient for the technical personnel to analyze and process the data in time, and adjust the filling amount and batch processing frequency of corrosion inhibitor in time. The monitoring data show that the corrosion rate of the gathering and transportation system is lower than the annual corrosion control index of 0.076 mm, which is under control.

In order to ensure the "strong physique" of the gathering and transportation pipeline, the plant strengthened pigging and batch treatment of slow-release agent for acid pipeline, timely collected the continuous filling information of corrosion inhibitor on site, continuously summarized pigging and batch treatment experience, and improved batch treatment operation scheme of corrosion inhibitor. The plant has carried out 109 times of pigging and batch treatment operations on 15 gathering and transportation pipelines, avoiding the direct contact between corrosive medium and pipe wall, effectively controlling the corrosion of acid gas on pipelines, and ensuring the safe operation of gathering and transportation pipelines.

Dynamic management of gas reservoir is the key to ensure stable production of gas field. The plant has seriously carried out gas reservoir dynamic analysis, established a "Trinity" development management system of plant, district (station) and management group, strengthened dynamic monitoring, collected, completed and accurate data, strengthened gas and liquid sample sampling, analysis and testing, and provided full and accurate basis for the formulation of gas reservoir development plan, and adhered to the system of regularly holding dynamic analysis meeting from formation to well In order to lay a solid foundation for the formulation of practical gas well production system, a comprehensive and systematic analysis is carried out from wellbore to surface.

In the face of the problems encountered in the production, the factory vigorously carried out technical research, focusing on solving production problems. Aiming at the problem of abnormal casing pressure in 3 wells, such as PU 106-2h, the plant timely organized technicians to conduct in-depth analysis and continuous practice. By installing casing pressure relief process on site, the casing pressure was controlled within a certain range, so that the gas well production remained stable. In view of the frequent blockage of the throttle valve and the mist catching net of the acid separation separator, the sulfur dissolving agent injection and electric tracing heating are adopted in the plant to solve the blockage problem and ensure the smooth operation of the gathering and transportation system.

It is reported that Puguang gas field, located in Puguang Town, Xuanhan County, has proven reserves of 356 billion cubic meters by the end of 2007. It is the largest and most abundant super large gas field in China, with an annual production capacity of 12 billion cubic meters of purified gas, ranking second in China. "Sichuan gas" may be delivered to Shanghai by the end of 2008, that is to say, Shanghai citizens are expected to use "Sichuan gas" for cooking and cooking. "Sichuan gas" transmission to Shanghai is indeed in the process of planning.

Investment scale

The total investment of the project is 62.7 billion yuan (including 33 billion yuan in Dazhou), 79 development wells and 16 well sites are deployed, with an annual output of 15 billion cubic meters of feed gas and stable production for more than 20 years. Puguang purification plant is the largest natural gas purification plant and sulfur production base in Asia. After full completion, it will have a processing capacity of 15 billion cubic meters per year, with a processing capacity of 3 million cubic meters per day for each series. There are 16 series of natural gas production units and supporting projects, with an annual output of 12 billion cubic meters of purified gas and 3 million tons of sulfur.

The 10.5 billion main development surface gathering and transportation project of Puguang gas field includes 18 stations, including 16 gas gathering stations, 1 gas gathering terminal station and 1 sewage station; the acid gas gathering and transportation pipeline is about 37km long, with 5 tunnels and 2 suspension spans of Houhe river. The total length of fuel gas return pipeline laid in the same ditch is about 30km. A total of 29 line block valve chambers (including 43 valves) are set on the gas gathering pipeline for safe cut-off of the gas gathering line.

All wet gas, heating throttling and heat preservation mixed transportation process is adopted in gathering and transportation process. The wellhead natural gas first enters the gas gathering station, and then is exported after heating, throttling and metering. The process of "heating and heat preservation + corrosion inhibitor injection" is adopted to enter the gas gathering trunk line through the gas gathering branch line, and then is transported to the gas gathering terminal station for water separation. The production sewage is transported to the sewage station for treatment and then reinjected into the formation. The saturated acid gas of steam is sent to the purification plant for purification

Chinese PinYin : Si Chuan Sheng Da Zhou Shi Xuan Han Xian Pu Guang Zhen