期刊
JOURNAL OF MARINE SCIENCE AND ENGINEERING
卷 11, 期 7, 页码 -出版社
MDPI
DOI: 10.3390/jmse11071387
关键词
underground energy systems; underground fluid storage; seabed monitoring; VEM; geomechanical modeling
This paper discusses the importance of underground fluid storage for balancing energy production and consumption, ensuring energy supply security, and reducing greenhouse gas emissions through CO2 geological sequestration. The authors developed a technology and methodology to monitor seabed movements and validate predictions of offshore underground fluid storage impacts. They integrated a measurement system into an Autonomous Underwater Vehicle to periodically monitor seabed bathymetry and compared these measurements with numerical simulations to confirm safety conditions. The Virtual Element Method was applied to simulate the response of the storage system to fluid storage.
Underground fluid storage is gaining increasing attention as a means to balance energy production and consumption, ensure energy supply security, and contribute to greenhouse gas reduction in the atmosphere by CO2 geological sequestration. However, underground fluid storage generates pressure changes, which in turn induce stress variations and rock deformations. Numerical geomechanical models are typically used to predict the response of a given storage to fluid injection and withdrawal, but validation is required for such a model to be considered reliable. This paper focuses on the technology and methodology that we developed to monitor seabed movements and verify the predictions of the impact caused by offshore underground fluid storage. To this end, we put together a measurement system, integrated into an Autonomous Underwater Vehicle, to periodically monitor the seabed bathymetry. Measurements repeated during and after storage activities can be compared with the outcome of numerical simulations and indirectly confirm the existence of safety conditions. To simulate the storage system response to fluid storage, we applied the Virtual Element Method. To illustrate and discuss our methodology, we present a possible application to a depleted gas reservoir in the Adriatic Sea, Italy, where several underground geological formations could be potentially converted into storage in the future.
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