Citation: | GUO Chaobin, WANG Fugang, LI Cai, ZHU Yutong. Site suitability evaluation method and application of compressed gas geological energy storage in lithologic trap[J]. Hydrogeology & Engineering Geology, 2024, 51(4): 10-20. doi: 10.16030/j.cnki.issn.1000-3665.202403010 |
The current evaluation of the suitability of lithological trap-type compressed gas geological storage sites is mostly based on static factors. It lacks a coupled analysis of dynamic multiple factors, leading to a significant gap between the assessment results and actual engineering applications. To develop a refined method for evaluating the suitability of energy storage sites, an integrated approach that combines static feasibility analysis with dynamic performance assessment, considering key aspects such as reservoir properties, energy storage safety, and practical operability was proposed. The method was applied in the A2 geological formation of the Gudong Oilfield. Through the static analysis of site geological features, quantitative evaluation using GPSFLOW numerical simulation software, and on-site pilot gas injection tests, the results show that after injecting 9.4×104 m3 of air, the pressure in the A2 geological formation decreases by 8.16% within 6 days. It indicates the good sealing performance meeting the requirements of energy storage space. Considering the dynamic performance of energy storage systems, the suitability evaluation method can provide more accurate data support for the site selection, construction, evaluation, and optimization of energy storage efficiency, further promoting sustainable development of clean energy utilization and energy transition.
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Structure explanation of A2 (east-west)
Domain discretization
Parameter of relative permeability and capillary pressure calculation function
Pressure variation in the basic model
Gas saturation distribution on different days
Schematic diagram of different boundary ranges
Pressure variation of different boundary ratio scenarios
Comparison of pressure variation for different porosity scenarios
Comparison of pressure variation for different permeability scenarios
Wellhead pressure variation during gas injection test