Abstract
The storage of natural gas in geological structures such as depleted fields, aquifers and salt caverns plays an important role in a gas supply system as it balances the fluctuation of gas demand and price. Hydraulic loss due to fluid flow through gas storage production equipment and an interfering effect from nonequal productivity index of storage wells may have an important influence on gas storage performance. An integrated mathematical model is developed based on underground gas storage facility production data. Using this model, the hydraulic loss is determined. A real test case that consists of a gas storage reservoir linked to the surface facility is analysed. The mathematical model uses an experimentally determined pressure drop coefficient in chokes. The base case scenario created using real gas storage facility data enables the achievement of a good history match with the given parameters of the gas storage reservoir. Using the history match simulation case as an initial scenario (a base case), two different scenarios are created to determine the injection and withdrawal performance of the gas storage field. The results indicate that the pressure drop in chokes, when fully open as a constraints in an underground gas storage facility, has a significant impact on gas storage operations and deliverability.
Highlights
The results indicate that the pressure drop in chokes, when fully open as a constraints in an underground gas storage facility, has a significant impact on gas storage operations and deliverability
This paper provides the methodology for an integrated mathematical model of Underground gas storage facilities (UGS) development with real data obtained from an underground gas storage facility in Croatia
The obtained coefficient was applied in the mathematical model for pressure-drop calculation on UGS chokes
Summary
Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations. Underground gas storage facilities (UGS) represent an important segment of gas infrastructure. Their primary function is to ensure a reliable and efficient supply of natural gas to private and public consumers. The storage of natural gas is a critical component of the natural gas supply chain that must be optimised to balance the gas supply and demand [1]
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