The layout of natural gas infrastructure for the f

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Shandong builds its first underground gas storage: the layout of natural gas infrastructure accelerates

"Sinopec plans to build an underground natural gas storage in Shandong in order to maintain the supply and output of natural gas in winter in North China such as Shandong." On October 30, a senior manager of the headquarters of a central oil enterprise revealed

it is understood that in 2016, the consumption of natural gas in Shandong Province was 9.6 billion cubic meters, an increase of 20% year-on-year; In 2017, it reached 13.4 billion cubic meters, with a year-on-year increase of 39.6%. It is expected that the demand for natural gas in Shandong Province will reach 17.5 billion cubic meters, 21 billion cubic meters and 25 billion cubic meters respectively. However, in the first half of 2018, the gas storage capacity of Shandong LNG storage and distribution station was 80.66 million cubic meters, which was only 0.6% of the province's natural gas consumption, far lower than the national level of 4% and the international average level of 12%-15%. This fully exposed the shortcomings of insufficient gas storage capacity in Shandong Province, including the tensile, contraction, low cycle and high cycle fatigue tests of materials and parts, which restricted the sustainable development of natural gas in Shandong Province

therefore, Shandong Provincial Development and Reform Commission hopes to build an underground natural gas storage to ensure the supply of natural gas in winter in Shandong. According to the above-mentioned senior management of the central petroleum enterprise, Sinopec has been preparing for the construction of this underground natural gas storage. "It is hoped that pilot tests will be carried out in Block Xia 8 of Yuhuangmiao oil and gas field and block Yong 21 of Yong'an oil and gas field in Shengli Oilfield - the capacity of the gas reservoir can be expanded to 500million cubic meters through pressurization and volume expansion."

in fact, one of the important reasons why gas restrictions occurred in Hebei and other places in the winter of 2017 was the lack of three gas reservoirs in the local natural gas underground test area. "At that time, many places in Shandong had to shut down not only enterprises, but also many residents had to limit gas, or even stop gas supply, because there was no natural gas supply." A Shandong local government staff member said frankly

Longzhong information analyst Wang Haohao said that the establishment of natural gas underground storage in Shandong Province is a good thing, which is beneficial to the development of local natural gas, but it has no impact on the gas restriction in Hebei and Beijing. "At present, Tianjin has two terminals, and Hebei also has terminals. Once the gas restriction occurs in Hebei and Beijing, the cost of Shandong natural gas underground storage will be much higher."

the gas reservoir capacity can reach 500million cubic meters

the natural gas underground storage of Sinopec Shengli Oilfield is located in Dongying City - after 40 years of construction, the oil well has no crude oil and has become a waste well. Therefore, turning it into a natural gas underground storage is an idea for the transformation of Sinopec's old oil field

it is understood that the so-called underground gas storage is a natural gas reservoir formed by re injecting natural gas into the underground space that can store gas. It is an energy infrastructure integrating seasonal peak shaving, emergency gas supply, national energy strategic reserve and other functions. Compared with other gas storage methods, underground gas storage has the characteristics of large reserves and low gas storage cost

as early as 1915, Canada has built the world's first underground gas storage. In 1975, Daqing oil field completed the first underground gas storage in China. In 2012, Sinopec built an underground gas storage in Zhongyuan Oilfield. At present, more than 30 have been built in China

"in the past, Shengli Oilfield not only produced crude oil, but also associated natural gas." "But with the continuous decline of crude oil production, the associated gas also fell rapidly," said the senior management of the above-mentioned oil central enterprises

according to the statistics, before 2010, the natural gas produced by Shengli Oilfield could be exported after meeting its own needs. After 2010, there was a gap in natural gas. In 2018, the daily gas shortage was nearly 600000 cubic meters, and by 2020, it will be 1.8 million cubic meters

for this reason, Shengli Oilfield purchases 570000 cubic meters of Sinopec natural gas from the west east Jiqing first-line pipeline every day, and also purchases about 130000 cubic meters of offshore LN, that is, high-strength and high modulus G, through Qingdao port. However, compared with the growth of demand, they are all stretched

more importantly, unlike crude oil, natural gas is not easy to reserve. Once the gas limitation in North China in winter, residents' natural gas will be affected, and the production of Shengli Oilfield will be greatly affected. Therefore, Sinopec hopes to build an underground natural gas storage in Dongying

according to the above-mentioned senior management of central petroleum enterprises, the original geological reserves of yong21 block are 330million cubic meters. If we pressurize and expand the volume, the capacity of the gas reservoir can be expanded to 500million cubic meters. The geological conditions of this block are good. "It is an anticline gas reservoir, just like a bowl upside down, and the gas is not easy to be lost."

"at present, the construction of yong21 block underground gas storage is still in its infancy. Many problems, such as the potential of trap expansion, the sealing and pressure bearing capacity of trap caprock and surrounding faults, and the injection and production capacity of gas wells, need further research." The person said

the construction of underground gas storage is accelerating

according to the figures provided by China Petroleum Exploration and Development Research Institute, China's natural gas import volume in 2017 was 92billion cubic meters, and the degree of external dependence was close to 40%. At the same time, the working gas volume of China's underground gas storage accounted for only 4% of the annual consumption, which was far lower than that of some developed countries

previously, the senior management of the National Energy Administration pointed out that the seasonal characteristics of natural gas consumption are obvious, and the national average peak valley difference in winter and summer is as high as 1.71. Establishing and improving the natural gas peak shaving system as soon as possible has become the biggest topic of the national energy reserve strategy

as early as February 2014, the national development and Reform Commission issued the measures for the management of natural gas infrastructure construction and operation, which stipulates that natural gas sales enterprises should establish natural gas reserves and have a working gas volume of no less than 10% of their annual contract sales by 2020, so as to meet the seasonal (monthly) peak shaving of the supplied market and the gas consumption requirements in case of emergency situations such as natural gas supply interruption

in June 2017, 13 ministries and commissions including the national development and Reform Commission jointly issued the opinions on accelerating the utilization of natural gas, pointing out that by 2030, China's underground gas storage will have an effective working gas volume of 35billion cubic meters. Therefore, in addition to underground gas storage, a number of large urban gas storage tanks and gas storage facilities similar to LNG terminals need to be built

in June this year, PetroChina started the construction of two natural gas reservoirs in Chongqing, Tongluoxia and huangcaoxia, with a total investment of 5.3 billion yuan. It is planned that after the completion of the project in 2022, 1.28 billion cubic meters of peak shaving natural gas will be formed, with a daily peak shaving of 10.58 million cubic meters of natural gas energy storage

with the acceleration of the construction of natural gas underground storage by central oil enterprises, natural gas infrastructure investment will become a new hot spot. The number of gas storage in the United States is 16 times that of China, and the construction of gas storage in China is still in its infancy

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