A Review of CO2 Marine Geological Sequestration

Sun, Xiang; Shang, Anran; Wu, Peng; Liu, Tao; Li, Yanghui

doi:10.3390/pr11072206

Cited by 9 publications

(3 citation statements)

References 67 publications

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“…High porosity allows for greater CO 2 storage capacity, while high permeability facilitates the movement of CO 2 within the rock. Sites with low porosity and permeability may have reduced injectivity rates, making them less suitable for CCS [126]. In addition, pressure and temperature conditions at the storage site are vital for maintaining CO 2 in a supercritical state, which is essential for efficient injection [86].…”

Section: Injectivity and Ratesmentioning

confidence: 99%

Impact of Regional Pressure Dissipation on Carbon Capture and Storage Projects: A Comprehensive Review

Hawez,

Asim

2024

Energies

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Carbon capture and storage (CCS) is a critical technology for mitigating greenhouse gas emissions and combating climate change. CCS involves capturing CO2 emissions from industrial processes and power plants and injecting them deep underground for long-term storage. The success of CCS projects is influenced by various factors, including the regional pressure dissipation effects in subsurface geological formations. The safe and efficient operation of CCS projects depends on maintaining the pressure in the storage formation. Regional pressure dissipation, often resulting from the permeability and geomechanical properties of the storage site, can have significant effects on project integrity. This paper provides a state-of-art of the impact of regional pressure dissipation on CCS projects, highlights its effects, and discusses ongoing investigations in this area based on different case studies. The results corroborate the idea that the Sleipner project has considerable lateral hydraulic connectivity, which is evidenced by pressure increase ranging from <0.1 MPa in case of an uncompartmentalized reservoir to >1 MPa in case of substantial flow barriers. After five years of injection, pore pressures in the water leg of a gas reservoir have increased from 18 MPa to 30 MPa at Salah project, resulting in a 2 cm surface uplift. Furthermore, artificial CO2 injection was simulated numerically for 30 years timespan in the depleted oil reservoir of Jurong, located near the Huangqiao CO2-oil reservoir. The maximum amount of CO2 injected into a single well could reach 5.43 × 106 tons, potentially increasing the formation pressure by up to 9.5 MPa. In conclusion, regional pressure dissipation is a critical factor in the implementation of CCS projects. Its impact can affect project safety, efficiency, and environmental sustainability. Ongoing research and investigations are essential to improve our understanding of this phenomenon and develop strategies to mitigate its effects, ultimately advancing the success of CCS as a climate change mitigation solution.

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Section: Injectivity and Ratesmentioning

confidence: 99%

Impact of Regional Pressure Dissipation on Carbon Capture and Storage Projects: A Comprehensive Review

Hawez,

Asim

2024

Energies

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“…The technologies for the exploitation of NGH include depressurization, − thermal stimulation, , carbon dioxide replacement method, , inhibitor method, , and solid fluidization method, among which depressurization is widely used in NGH test exploitation, and the other methods are mostly implemented jointly with depressurization. − At present, the depressurization method has been used in marine NGH test exploitation successfully over the world. , However, in the depressurization exploitation of NGH, the rise in the pore pressure ( P p ) will cause the change in the local effective stress (σ 31 ′) state of the hydrate-bearing sediment (HBS) and then disturb the cementation of the sediment, − and the dissociation of hydrate caused by depressurization will result in the destruction of the hydrate cementation structure and consolidation deformation of the skeleton structure under the external load, ,− which can cause a change of pore structure and permeability in the HBS and influence the rate of gas production. , Present scholarly inquiries on seepage predominantly concentrate on the variations in the absolute and relative permeabilities within the HBS instigated by hydrate formation and dissociation.…”

Section: Introductionmentioning

confidence: 99%

Permeability Anisotropy of Hydrate-Bearing Sediment during Consolidation Process: Insights from CT Scanning and Pore Network Modeling

Li,

Shang,

et al. 2024

Energy Fuels

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During the initial phase of the depressurization exploitation process of natural gas hydrate, the reduction of pore pressure will cause effective stress concentration and consolidation deformation in the hydrate-bearing sediment (HBS), while the occurrence of the water-channeling phenomenon will trigger the rise of pore pressure and swelling locally in the reservoir. Evaluating the dynamic evolution process of HBS permeability is crucial for reservoir capacity. In this research, with the X-ray CT triaxial experiments and the pore network model, the permeability change characteristics in the compression and swelling processes of HBS with a saturation of 0.29 were investigated. It is found that there is a progressive decline in absolute permeability as the effective stress increases, while the capillary pressure (P c ) gradually increases, and the anisotropy of capillary pressure first rises and then diminishes; the gas relative permeability (k rg ) increases, and the water relative permeability (k rw ) decreases with the increase of effective stress during the compression process. During the swelling process, the absolute permeability and capillary pressure do not recover, whereas for unconsolidated HBS, k rg is larger and k rw is lower under the same effective stress.

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“…To meet the global energy demands, CO 2 emissions from fossil fuels continue to increase [1]. CO 2 capture and storage (CCS) is crucial for mitigating the CO 2 concentration in the atmosphere for sustainable development considering the environment [2,3]. The CCS technology consists of CO 2 capture (using absorption, adsorption, cryogenic purification, and membranes), CO 2 compression and liquefaction (CCL), CO 2 transportation (via trucks, ships, and pipelines), and sequestration in the ground, sea, and depleted reservoirs [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

CO2 Compression and Liquefaction Processes Using a Distillation Column for the Flexible Operation of Transportation

Kim,

Jung,

Lim

et al. 2024

Processes

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Impurities in the CO2 stream should be removed to prevent eventual phase changes in CO2 transportation because a two-phase flow caused by the phase change in the pipeline necessitates additional overpressure and can induce equipment damage. In this study, CO2 compression and liquefaction (CCL) processes with a distillation column were used to remove non-condensable impurities and were compared with those with a flash. Three different feeds with a flow rate of 50.1 t/h (400,500 t/y) were supplied to the CCL processes and compressed to 65 bar to gauge pressure (barg) and 20 °C. Although the CO2 mixtures obtained through dehydration and flashing met the purity requirements for transportation and storage recommended in literature, the flash-separated CO2 product at 65 barg demonstrated the coexistence of gas and liquid phases, which restricted the temperature window for liquid CO2 transportation. When the distillation column was used instead of the flash, the operating temperature window at 65 barg widened by 3–6 °C owing to the high purity of CO2. However, the levelized cost of CO2 liquefaction (LCCL) increased by 2–4 $/t-CO2 varying with the feed purity because the distillation column consumed more cooling and heating duties than the flash. This study highlighted that a two-phase flow existed under certain operating conditions despite a high purity of CO2 (over 97 mol%), and the distillation column enhanced the operability of liquid CO2 transportation.

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A Review of CO2 Marine Geological Sequestration

Cited by 9 publications

References 67 publications

Impact of Regional Pressure Dissipation on Carbon Capture and Storage Projects: A Comprehensive Review

Impact of Regional Pressure Dissipation on Carbon Capture and Storage Projects: A Comprehensive Review

Permeability Anisotropy of Hydrate-Bearing Sediment during Consolidation Process: Insights from CT Scanning and Pore Network Modeling

CO2 Compression and Liquefaction Processes Using a Distillation Column for the Flexible Operation of Transportation

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