Techno-economic and life-cycle assessment of subsurface hydrogen and synthetic geothermal storage technologies

Journal of Energy Storage, Год журнала: 2025, Номер 118, С. 116020 - 116020

Опубликована: Март 17, 2025

Язык: Английский

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Using Numerical Models to Test the Applicability of a Pressure Buildup Analytical Equation for H2 Storage in Aquifers

SPE Reservoir Simulation Conference, Год журнала: 2025, Номер unknown

Опубликована: Март 18, 2025

Abstract This work quantifies the applicability of an analytical hydrogen pressure buildup equation for real geological conditions. Analytical results are compared against multiple simulation models to assess under what conditions solution accurately portrays buildup. The equations were then applied evaluate injectivity saline formations in Sacramento Basin. approach taken this includes solving equations, setting up equivalent reservoir model, and running cases with varying properties. Properties considered variation include permeability, radial extent, pressure, temperature. After comparing solutions cylindrical same process was done a model rectangular coordinates. observed be adequate estimate many injection scenarios. However, reservoirs low permeability (<10 mD), thickness (<10m), or pressures (<40 bar), estimates errors greater than 5 bar. It that all reasonable rates, could numerical models. layered partially penetrated reservoirs, not accurately, partly because set assuming full penetration. Significant deviations from early-time when using equation. We were, however, able formulate correction factor estimating early time effect as function thickness, time, initial pressure. provides confidence quick assessing H2 five Basin determine their suitability storage based on injectivity, providing novel information potential Findings study fill significant gaps literature regarding can used. advances understanding dynamics applications corrections enable fit results.

Язык: Английский

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Thermohydrochemical Modeling of Hydrogen Generation from Stimulated Ultramafic Rocks

SPE Reservoir Simulation Conference, Год журнала: 2025, Номер unknown

Опубликована: Март 18, 2025

Abstract This study is a preliminary model of hydrogen generation from stimulated ultramafic rocks. A coupled thermohydrochemical simulates the multifaceted processes heat transfer, fluid flow, and chemical reactions, accounting for generation, phase changes, thermal energy release, new material formation during induced serpentinization. Some inputs were experimental data, others taken works in literature. The rock was compared to base unstimulated rock. also used explore various well configurations. run two months with 15 days injection, shut-in, 30 production. simulations rocks revealed larger yield than case. For vertical wells, case gave two-fold increase produced Also, cumulative production wells layer nearly equivalent that horizontal wells. While an lateral length initially resulted gas rates, allowed more water production, leading rapid decline rate leveling different lengths. Catalysis identified as significant factor improving reaction rates lowering activation huge within layer. In presence seal/caprock, modeled this study, can act temporary accumulation site. Sensitivity analysis conducted evaluate effects fault thickness on migration accumulation. scenarios, exhibited minimal influence Conversely, sensitivity scenarios increasing negatively impacted However, porous medium layer, increased led enhancement observed up thousand-fold. These findings deduce optimal conditions migration, indicate catalysis speed thick allow generated hydrogen, vicinity source make effective configuration maximizing suggests there are opportunities optimize operational parameters improve generation. There need lot data finetune model, grid refinement studies, codes complex associated provides critical insights engineering optimized systems, pioneers advancement modeling potential low-carbon technology.

Язык: Английский

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Where is Electricity Curtailment Happening in California? Opportunities for Underground Energy Storage

SPE Western Regional Meeting, Год журнала: 2025, Номер unknown

Опубликована: Апрель 25, 2025

Abstract Curtailed electricity is a reduction of output and leads to the loss potentially useful renewable electricity, therefore lost opportunities for reducing carbon dioxide emissions. The power imbalance determined by combination economic factors, but most importantly demand. Other factors include bidding strategy technical such as limitations in transmission capacity energy storage. methodology understand curtailed temporally geospatially includes data collection from publicly available sources California Independent System Operator (CAISO) directly Open Access Same-Time Information (OASIS) platform. CAISO tracks shorter-term year-by-year patterns curtailment has shown that occurs middle day months February-June when solar wind generation high, demand low due moderate temperatures across California. In this work, we have identified geo-spatial distribution these units amount unit unit. increasing dramatically year over 1.5 TWh 2021 3.4 2024, example. results show strongly affects (photo-voltaic PV) compared farms. with were based on rated total generation. Most PV-electricity within or adjacent geological formations favorable characteristics subsurface storage form hydrogen. Calculations reservoirs more than sufficient accommodate volumes produced hydrogen equivalent electricity.

Язык: Английский

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A novel data-driven machine learning model to predict maximum hydrogen column height for saline aquifers

International Journal of Hydrogen Energy, Год журнала: 2025, Номер 142, С. 98 - 108

Опубликована: Июнь 1, 2025

Язык: Английский

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