A study on the thermal-hydrodynamical-coupled CO2 flow process in the Ordos CCS-geological-formation

Lei, Hongwu; Cai, Yuna; Lu, Meng; Li, Xiaochun; Connell, Luke D.

doi:10.1016/j.ijggc.2020.102999

Cited by 18 publications

(13 citation statements)

References 36 publications

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“…In a word, the model cannot be successfully solved without addressing the above issues. 33 Here, a hypothetical heat source is applied to express the variations of heat from liquid phase to gaseous or solid phase as well as from solid phase to gaseous phase, contrary to continuous release latent heat, the heat source is fixed on the nozzle. In subsequent process, the energy conservation is assumed only controlled by convection and conduction.…”

Section: Solution Methodsmentioning

confidence: 99%

“…In addition, it is hard to calculate the energy conservation due to the fluctuation of phases. In a word, the model cannot be successfully solved without addressing the above issues 33 . Here, a hypothetical heat source is applied to express the variations of heat from liquid phase to gaseous or solid phase as well as from solid phase to gaseous phase, contrary to continuous release latent heat, the heat source is fixed on the nozzle.…”

Section: Simulation Approachmentioning

confidence: 99%

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Numerical approach of liquid carbon dioxide injection in crushed coal and its experimental validation

Yang

et al. 2020

Int J Energy Res

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Summary The safety issues are a major restriction on coal mining and growing efforts are being made in the search for solutions that will guarantee sustainable use of energy resources. Liquid carbon dioxide is attracting particular interest of coal fire‐fighting due to the promising efficiency of cooling and asphyxia. Our objective is to develop a valid model to simulate the dispersion and thermal behaviors of liquid carbon dioxide under crushed coal condition and assessment of liquid carbon dioxide injection for coal fire‐fighting. For this purpose, a numerical approach which requires an accurate state equation for calculating physical parameters of carbon dioxide, also accounts for appropriate description of energy transformation during the injection is presented. The validation of such a model against three experimental tests on temperature variation is proposed, and the model has proved capable of accurately predicting the heat and mass transfer process when liquid carbon dioxide is injected into crushed coal. Furthermore, the impact of nozzle diameter on the dispersion and thermal behaviors of liquid carbon dioxide is extensively investigated.

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Section: Solution Methodsmentioning

confidence: 99%

Section: Simulation Approachmentioning

confidence: 99%

Numerical approach of liquid carbon dioxide injection in crushed coal and its experimental validation

Yang

et al. 2020

Int J Energy Res

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“…The size of the reservoir model is set to 10,000 × 10,000 × 70 m, and the depth is 2000−2070 m. The reservoir thickness was set to 30 m, and others were set to 20 m. When there are interlayers, it is assumed that it is interspersed in the flowing into the reservoir from the wellhead is realized. To improve the rationality of parameter design, a number of onsite CO 2 geological storage 7,9,10,50,51 and wellbore-reservoir coupling numerical simulation 8,31,51 cases were referred to.…”

Section: Co 2 Storage Casementioning

confidence: 99%

Influence of Reservoir Spatial Heterogeneity on a Multicoupling Process of CO₂Geological Storage

Gao,

Yang,

Shen

et al. 2023

Energy Fuels

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As a means of delaying climate change, injecting carbon dioxide (CO2) into geological structures can be an effective carbon capture, utilization, and storage (CCUS) strategy. All geological structures are naturally spatial heterogeneity, which can significantly affect fluid flow and heat transfer, thereby affecting CO2 storage. We modeled fluid flow and heat transfer in 12 CO2 storage scenarios with spatially heterogeneous reservoirs using a thermal-hydraulic-mechanical (THM) coupled model of a 3D wellbore-reservoir system. CO2 injectability and distribution uniformity were studied in relation to reservoir vertical heterogeneity and interlayers. The optimization method of engineering parameters is discussed. Positive rhythm reservoirs exhibit more uniform CO2 distribution laterally under gravity than reverse rhythm reservoirs. In high permeability ratio reservoirs, the low-temperature zone has a longer transfer distance and CO2 is more likely to be injected, but channeling is prone to occur. Reservoir porosity has little effect on reservoir CO2 injectability and temperature distribution. The interlayers will weaken the influence of gravity and reduce the CO2 injectability while providing additional storage volume. Injecting CO2 at a lower temperature and mass flow will increase injectability. The uniform distribution of CO2 laterals is most effectively improved by hydraulic fracturing. Using low thermal conductivity materials for the wellbore insulation to reduce heat replenishment from the surrounding formation is critical.

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“…As a result, more and more governments have set up goals and associated plans to reduce emissions of greenhouse gases such as CO 2 (Aminu et al, 2017). CO 2 geological sequestration (CGS) is viewed to be an effective strategy to help reduce CO 2 emissions into the atmosphere in the short term (Lei et al, 2020). The CGS is the critical step in the CCS (CO 2 capture and storage) chain, which refers to injecting CO 2 separated from industrial or related emission sources into specific geological structures in order to isolate it from the atmosphere for a long time (Thomas and Benson, 2005).…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Thermo‐Hydro‐Mechanical‐Chemical Response Caused by CO₂Injection into Saline Geological Formations: A Case Study from the Ordos Project, China

Fan

Yang

et al. 2023

Acta Geologica Sinica (Eng)

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Thermo‐hydro‐mechanical‐chemical (THMC) interactions are prevalent during CO2 geological sequestration (CGS). In this study, a sequential coupling THMC numerical simulation program was constructed, which can be used to explore the following issues of CGS: fluid and heat flow, solute transport; stresses, displacements and rock failures related to geo‐mechanical effects; equilibrium and kinetic chemical reactions; chemical damage to mechanical properties of the rock. Then, the coupling program was applied to the Ordos CGS Project to study the formation response under the multi‐field interaction caused by CO2 injection. The simulation results show that the mechanical process dominates the short CO2 injection period. Specifically, the formation's permeability near the injection well increases by 43%, due to the reduction of effective stress, which significantly promotes the lateral migration of CO2. When the injection rate exceeds 0.15 million tons per year, the cohesion of the reservoir rock is not enough to resist the shear force inside the rock and rock failure may occur. During the subsequent long‐term sequestration period (200 years), the influence of mineral reactions gradually increases. Due to calcite dissolution, the shear modulus of caprock is predicted to decrease by 7.6%, which will to some extent increase the risk of rock failure.

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A study on the thermal-hydrodynamical-coupled CO2 flow process in the Ordos CCS-geological-formation

Cited by 18 publications

References 36 publications

Numerical approach of liquid carbon dioxide injection in crushed coal and its experimental validation

Numerical approach of liquid carbon dioxide injection in crushed coal and its experimental validation

Influence of Reservoir Spatial Heterogeneity on a Multicoupling Process of CO₂Geological Storage

Numerical Simulation of Thermo‐Hydro‐Mechanical‐Chemical Response Caused by CO₂Injection into Saline Geological Formations: A Case Study from the Ordos Project, China

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A study on the thermal-hydrodynamical-coupled CO2 flow process in the Ordos CCS-geological-formation

Cited by 18 publications

References 36 publications

Numerical approach of liquid carbon dioxide injection in crushed coal and its experimental validation

Numerical approach of liquid carbon dioxide injection in crushed coal and its experimental validation

Influence of Reservoir Spatial Heterogeneity on a Multicoupling Process of CO2Geological Storage

Numerical Simulation of Thermo‐Hydro‐Mechanical‐Chemical Response Caused by CO2Injection into Saline Geological Formations: A Case Study from the Ordos Project, China

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Influence of Reservoir Spatial Heterogeneity on a Multicoupling Process of CO₂Geological Storage

Numerical Simulation of Thermo‐Hydro‐Mechanical‐Chemical Response Caused by CO₂Injection into Saline Geological Formations: A Case Study from the Ordos Project, China