International Journal of Hydrogen Energy, Journal Year: 2024, Volume and Issue: 98, P. 341 - 352
Published: Dec. 9, 2024
Language: Английский
International Journal of Hydrogen Energy, Journal Year: 2024, Volume and Issue: 79, P. 883 - 900
Published: July 11, 2024
Underground hydrogen storage (UHS) has been considered as an integral part of energy transition from fossil fuels to renewable sources. Porous aquifers can serve typical sites for this purpose due their worldwide distribution and huge capacity. However, the diverse microbial species that inhabit are known be able catalyze in-situ biochemical reactions within hosting rock. These normally lead consumption hydrogen, clogging pore space thus affect injection withdrawal rates reported in literature. So far, these phenomena have widely but rarely quantified. In study, we build a coupled hydrological-mechanical-chemical-biological (HMCB) multiphysics model simulate microbe-related processes during UHS aquifers. The consists complete set partial differential equations describe: (1) rock deformation; (2) water-hydrogen two-phase flow; (3) microbes dissolved transport; (4) mineral dissolution/precipitation; (5) activities involving adsorption/desorption growth/decay. All linked together through porosity/permeability models which consider joint impacts clogging, dissolution/precipitation effective stress. This is verified against laboratory reaction data transport data. Then, used investigate iron-reduction bacteria (IRB) on Based simulation results, it concluded saturation at top surface aquifer greatest while surrounding well stimulated most; influence initial few cycles gradually diminish with dissolution Fe2O3; recovery efficiency degraded combined effects consumption, water production impact being most significant; stress permeability throughout operations influences cycles. For dissolution/precipitation, neglected.
Language: Английский
Citations
10
International Journal of Hydrogen Energy, Journal Year: 2024, Volume and Issue: 88, P. 594 - 603
Published: Sept. 21, 2024
Language: Английский
Citations
5
Fuel, Journal Year: 2025, Volume and Issue: 388, P. 134561 - 134561
Published: Feb. 5, 2025
Language: Английский
Citations
0
Physics of Fluids, Journal Year: 2025, Volume and Issue: 37(4)
Published: April 1, 2025
This study introduces a fully coupled two-phase flow and geomechanics model to simulate the extraction of coalbed methane (CBM) water from coal reservoirs with conductive fractures blocking barriers, characterized by high low permeability, respectively. These barriers are modeled as low-dimensional objects. The accuracy proposed is first validated against reference case using open-source simulator DuMux. Following validation, applied reservoir discrete fracture network CBM production. simulation results reveal that gas decrease both nonwetting phase saturation pressure, pressure decreasing more rapidly. leads permeability changes due depressurization shrinkage-induced strain. Fracture near well decreases, while it significantly increases in far-field region. Sensitivity analysis indicates higher initial lower entry enhance productivity. relationship between stiffness, matrix elasticity, production exhibits non-monotonic behavior. As stiffness elasticity may initially decline but increase again. highlight complex interaction properties, where plays key role determining rates cumulative angles influence connectivity network, affecting fluid flow, changes, rates, even similar density. Overall, this offers valuable insights for accurate predictions
Language: Английский
Citations
0
Fuel, Journal Year: 2024, Volume and Issue: 381, P. 133437 - 133437
Published: Oct. 18, 2024
Language: Английский
Citations
3
Natural Resources Research, Journal Year: 2024, Volume and Issue: 33(5), P. 2173 - 2191
Published: May 4, 2024
Language: Английский
Citations
1
Fractal and Fractional, Journal Year: 2024, Volume and Issue: 9(1), P. 17 - 17
Published: Dec. 30, 2024
The adsorption of coalbed methane alters the pore structure reservoirs, subsequently affecting coal seam’s gas capacity. However, traditional models often neglect this crucial aspect. In article, we introduce a fractal capillary bundle model that accounts for expansion seam adsorption. We utilize curvature dimension and to characterize complexity structure. By incorporating concept fictitious stress, have described relationship between adsorption, matrix porosity, permeability changes. developed describes changes in porosity during process. After fitting experimental data, it demonstrated high accuracy predictions. Furthermore, our investigation into how factors such as dimension, stress influence capacity reveals several key findings. Firstly, specific surface area within seams is primary factor controlling Secondly, virtual generated process maximum capacity, cannot be overlooked. Lastly, found primarily affects migration process, while under high-pressure conditions, desorption does not cause significant permeability.
Language: Английский
Citations
1
Published: Jan. 1, 2024
Coal reservoirs are advantageous place for storing carbon dioxide and hydrogen by its dual-pore structure significant sorption capacity. Effect of gas has long been treated as one the most important reasons coal permeability evolution under stress-controlled conditions widely reported elsewhere. Current studies have focusing on development relations between bulk strain various stress conditions. A fundamental assumption behind these efforts is that a local equilibrium matrixes fracture within sample was achieved during period measurements. Under this assumption, pressure associated swelling distribute uniformly throughout entire while equilibration process pressures no role to play. In study, we assume diffusion induced other than determines in transient period. To achieve goal, special apparatus setup continuously monitor/calculate controlling variables injection: (1) permeability; (2) strain; (3) (4) matrix strain. major injection test conducted [[EQUATION]] reference helium condition constant effective stresses (both confining fixed). test, close relation observed over experimental time. Permeability experiences four distinct stages: increase; decrease; recovery; stable. These observations suggest changes remains unchanged after change function Based observations, conclude behaves multimodal
Language: Английский
Citations
0
Published: Oct. 11, 2024
Abstract Carbon dioxide (CO2) and hydrogen (H2) can be symbiotically stored in coal seams, as an effective method for storing H2 to facilitate the transition from fossil-based energy systems renewable sources sequestering growing amounts of captured CO2 meet carbon neutrality goals. The key challenge this process lies determining interactions between different fluid components fluids rocks, a typical dual-porosity medium. This research first derives governing equations depict flow behavior multi-component gases fracture matrix. effect unconventional stress (UES) on reservoir deformation presence multicomponent are also characterized by control equations. Then UES-dependent porosity permeability models were developed explicitly quantify such interactions. A fully coupled numerical model was established characterize response when symbiotic stored. We subsequently validate through experimental data then use simulate cyclic operations storage seams. results injection production reservoirs support main conclusions are: 1. cushion increases pressure prevent significant amount waste; 2. Under gas stripping effect, desorbs matrix transfers into system mix with H2. mixing phenomenon becomes increasingly pronounced progression cycles, leading gradual decrease purity withdrawn H2; 3. during decreases recovery; 4. larger adsorption strain constant H2, greater corresponding fictitious stress, resulting smaller fluctuations processes; 5. Low-rank seams exhibit best injectivity productivity performance, while high-rank have highest unit capacity CO2. demonstrate that used interaction working gas, well rocks. proofs feasibility
Language: Английский
Citations
0
International Journal of Hydrogen Energy, Journal Year: 2024, Volume and Issue: 98, P. 341 - 352
Published: Dec. 9, 2024
Language: Английский
Citations
0