Modeling natural gas underground storage in the hydrated state in permafrost aquifers
https://doi.org/10.25587/SVFU.2022.26.2.002
Abstract
The paper presents the results of a computational experiment aimed at obtaining criteria for the selection of geological structures for the creation of a natural gas underground storage in the hydrated state in permafrost aquifers. The advantages of this method of underground gas storage are greater compactness and stability of the storage, because the gas in the hydrated state occupies a much smaller volume than in the free state at the same temperature and pressure. A mathematical model of gas injection through a single well into a horizontal aquifer is presented, which takes into account all the basic physical and thermodynamic features of the process under consideration, including gas compressibility, the Joule-Thomson effect, adiabatic expansion, non-isothermal filtration of water and gas, mass transfer between gas, water and hydrate. This model is used to estimate the dynamics of the distribution of hydrate saturation, water saturation, pressure and temperature in the aquifer at different intensity values of gas injection and filtration-capacitance properties of the reservoir. In addition to porosity and permeability, the selected reservoir (depleted gas or aquifer) is characterized by initial values of pressure, temperature and water saturation. The variable parameters are the reservoir porosity and the volume flow rate of the injected gas. The results of the calculations showed that aquifers should be chosen for the creation of underground gas storage facilities in a hydrated state, depending on their reservoir properties and hydrodynamic characteristics. In further studies, it is necessary to evaluate the thermal interaction of such storages with the surrounding rocks. To do this, the proposed mathematical model should be generalized in a twodimensional formulation. The results obtained and the mathematical model can be used to develop the scientific foundations of underground storage technology not only for natural gas, but also for associated petroleum gas, as well as greenhouse and toxic gases in a hydrate state.
About the Authors
I. I. Rozhin
Institute of Oil and Gas Problems SB RAS, Federal Research Center «Yakut Scientific Center SB RAS»
Russian Federation
Russian Federation
ROZHIN Igor Ivanovich – Doctor of Technical Sciences, Associate Professor, Chief Researcher
Yakutsk
K. K. Argunova
Institute of Oil and Gas Problems SB RAS, Federal Research Center «Yakut Scientific Center SB RAS»
Russian Federation
Russian Federation
ARGUNOVA Kira Konstantinovna – Candidate of Physical and Mathematical Sciences, Senior Researcher
Yakutsk
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Review
For citations:
Rozhin I.I., Argunova K.K. Modeling natural gas underground storage in the hydrated state in permafrost aquifers. Vestnik of North-Eastern Federal University Series "Earth Sciences". 2022;(2):10-21. (In Russ.) https://doi.org/10.25587/SVFU.2022.26.2.002
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