[Ten years of development of chemical equipment] 1294-2023 The world’s first electric molten salt energy storage and steam injection test station is put into operation in Liaohe Oilfield

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On December 6, 2023, the world's first electrothermal molten salt energy storage and steam injection test station was completed and put into operation in PetroChina's Liaohe Oilfield. It is reported that the existing molten salt energy storage technology uses liquid molten salt as a heat storage and heat transfer working medium, converts light heat, valley electricity, and green electricity into thermal energy and stores it in the molten salt, and then continuously releases the thermal energy to generate superheated steam for power generation. Different from the traditional molten salt power generation industry, the Liaohe Oilfield electrothermal molten salt energy storage steam injection test station project is the first time in the world that electrothermal molten salt technology is applied to the oilfield production steam injection system. This technology uses a self-developed steam generation system to exchange heat between oil field reused sewage and high-temperature molten salt. The generated steam is directly used for oil field steam injection production. It can effectively reduce energy process losses and increase the overall efficiency from 35% of the molten salt energy storage power generation system to more than 90%. It is a new attempt to break through the application scenarios of this technology. It is understood that PetroChina Liaohe Oilfield, as the largest heavy oil and high-condensation oil production base in China, has maintained a stable production of 10 million tons of oil and gas for 37 consecutive years. The steam injection system consumes about 1.4 billion cubic meters of natural gas and emits 3.03 million tons of carbon dioxide every year. There is an urgent need to explore green and effective clean energy alternatives. To this end, Liaohe Oilfield has listed the "Electrothermal Molten Salt Energy Storage Steam Injection Test Station Project" as a key scientific research project of the "Horse Racing System". In December 2022, it carried out research and testing on electrothermal molten salt energy storage steam injection technology, and successfully conquered key technologies such as "Electrothermal Molten Salt Energy Storage Heat Exchange Cycle Technology" and "Precise Control of Steam Generator Dryness". Technology, independently developed the "molten salt heating once-through wet saturated steam generation device", forming a series of electrothermal molten salt heat storage and steam injection technology suitable for heavy oil oil fields, including 14 core technologies in 5 categories including "molten salt process technology" and "high temperature storage tank technology". It has applied for 1 international invention patent and 9 domestic invention patents.