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Abstract

Summary

Seasonal storage of hydrogen produced from renewable energy can become one of the key strategies to meet the high energy demand of today’s society. The most suitable sites for seasonal hydrogen storage are depleted gas fields. This study proposes a workflow based on the integration of full-waveform inversion (FWI), rock physics modeling (RPM) and gas property modeling for monitoring changes in elastic medium parameters due to hydrogen injection. A rock physics model including the Gassmann equation and fluid mixing laws has been implemented, which accurately links rock physical properties to elastic properties. The parameterized approach is based on optimizing fluid saturation to reduce crosstalk between model parameters during the inversion process, while simultaneously providing a quantitative estimation of the fluid within the reservoir. The synthetic models show that parameterized inversion produces higher accuracy and fewer artifacts than conventional FWI. Our results underscore the importance of an appropriate RPM to reflect real subsurface conditions and proper fluid mixing laws. Therefore, FWI parameterization provides an efficient technique for monitoring hydrogen storage sites in depleted gas fields to ensure efficient storage.

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/content/papers/10.3997/2214-4609.202421200
2024-11-04
2025-01-23

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Monitoring Elastic Parameters Changes during Underground Hydrogen Storage Using Rock Physics Parametrized FWI
Conference Proceedings 2024, 1 (2024); https://doi.org/10.3997/2214-4609.202421200
/content/papers/10.3997/2214-4609.202421200
/content/papers/10.3997/2214-4609.202421200
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