Background: With the rapid development and popularization of sensing technology and information technology,the oil and gas industry has an increasingly strong demand for intelligence,which is also true for gas storage,and the optimized operation of surface engineering is an important embodiment of intelligence. In order to master the operation law of surface engineering of gas storage, improve the level of production management and reduce the cost of gas injection, we investigate the stimulation and optimization of a surface gas injection system of practical underground gas storage.
Method: According to the ideal gas equation of state, the calculation formula for gas injection well pressure is proposed and verified by actual data, which is taken as the constraint condition, the surface gas injection system is modeled by using Aspen HYSYS simulation software.
Results: Through the variation of compressor power, it is consumed that the optimal injection pattern is pressure equalizing injection and the optimal number of injection wells is three wells. Besides, the relationship between injection flow and well pressure with injection time under the optimal injection pattern is studied. Finally, the functional formulas of well pressure and injection flow with injection time are obtained.
Conclusions: The results obtained can not only provide a basis for the gas injection decision-making of production systems but also can provide basic guarantee for the digital transformation and intelligent operation of enterprises.