UTILISATION OF AN EXISTING NATURAL GAS STORAGE FIELD FOR HYDROGEN STORAGE: NORTHERN MARMARA DEPLETED GAS FIELD SIMULATION STUDY

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2022-9-02

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Gürsel, Hasan

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The time window for energy transition gets narrower each day under the pressure of climate change. Underground hydrogen storage (UHS) can play a cruicial role in future energy systems as it may hit two birds with one stone by assuring energy security and mitigating climate change. In this study, a UHS simulation is conducted using data from the Northern Marmara Field. A commercial compositional flow simulator is used for simulating methane and hydrogen storage periods of 25 years each. As the current simulation techniques are insufficient to eradicate numerical dispersion at the field scale, it was minimized by numerical controls and assumed to be a substitution for physical dispersion. Results showed that, for a field of such a large scale with multiple wells, each well would produce significantly different streams depending on well location and time. With each hydrogen cycle, the separation between the total injected and produced amounts has increased, leaving 2.61% of hydrogen to be remaining in the reservoir. However, the remaining portion could be retrieved by further depleting the reservoir with an extended production. The total withdrawn energy has been calculated as 371 TWhs for the methane storage period and 119 TWhs for the hydrogen. To compare respectively, during the methane storage period, 2.6 times more energy was withdrawn in the first cycles, raising to 6.2 times more energy for the 25th cycles. As the fraction of methane that has been produced during the hydrogen cycles decreased, the energy content of the produced stream also decreased.

Subject Keywords

Underground Hydrogen Storage, Energy Security, Climate Change Mitigation, Hydrogen Reservoir Simulation

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https://hdl.handle.net/11511/99578

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

H. Gürsel, “UTILISATION OF AN EXISTING NATURAL GAS STORAGE FIELD FOR HYDROGEN STORAGE: NORTHERN MARMARA DEPLETED GAS FIELD SIMULATION STUDY,” M.S. - Master of Science, Middle East Technical University, 2022.