Calculation method for effective cavity volume of salt cavern gas storage

• Published in: You-qi chuyun Vol. 40; no. 8; pp. 909 - 913
• Main Authors: Jianfu WANG, Na WANG, Kaizhi XU, Jingliang XIA
• Format: Journal Article
• Language: Chinese
• Published: Editorial Office of Oil & Gas Storage and Transportation 01.08.2021
• Subjects: brine discharge concentration; bulk volume of insoluble; effective volume; mathematical model; salt cavern gas storage
• ISSN: 1000-8241
• DOI: 10.6047/j.issn.1000-8241.2021.08.011

Salt cavern gas storage is constructed by solution mining, and it is necessary to conduct regular sonar survey and string adjustment according to the effective volume of the salt cavity. For this purpose, a calculation method for the effective cavity volume of salt cavern gas storage was proposed, including the determination method of brine discharge concentration and the mathematical model for calculation of the effective volume. The argentometry was used to determine the brine discharge concentration, with which the volume of salt mined could be calculated. Then, the formulas for calculating the effective cavity volume, the total volume of salt bed used and the volume of the expanded insoluble could be derived by following the conservation principle of salt cavity volume. Finally, check calculation was performed for the formulas with Cavity A of Jintan Gas Storage as the example. According to the results, the brine discharge concentration is about 300 g/L, close to saturation, the average mining speed is 23