Control mechanisms of pore-pressure dissipation in debris flows

Zheng, Hongchao; Shi, Zhenming; Kaitna, Roland; Zhao, Fang; Haas, Tjalling de; Hanley, Kevin J.

doi:10.1016/j.enggeo.2023.107076

Cited by 3 publications

(3 citation statements)

References 42 publications

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“…This injection process itself contributes to an immediate increase in the overall pressure within the storage reservoir [53]. The increase in pressure can be substantial, depending on factors such as the injection rate, the geological characteristics of the formation, and the initial pressure conditions [54,55]. The injection-induced pressure increase has several implications.…”

Section: Mechanism Of Regional Pressure Dissipationmentioning

confidence: 99%

“…These formations are typically located deep underground and are often found in depleted oil and gas reservoirs or deep saline aquifers [92,93]. A crucial aspect of successful CO 2 storage is the maintenance of sufficient pressure within the geological formation [54]. Pressure plays a pivotal role in keeping the CO 2 in a dense and supercritical state, which is essential for it to remain in a liquid-like state and be effectively stored underground [94].…”

Section: Storage Capacitymentioning

confidence: 99%

“…Pressure changes may activate pre-existing faults or induce the creation of new fractures in the sealing formations. This can compromise their sealing capacity, allowing CO 2 to escape or migrate into overlying geological strata [54]. Excessive pressure dissipation can lead to cap rock failure, where the impermeable layer that should contain the CO 2 ruptures or develops permeable pathways.…”

Section: Storage Capacitymentioning

confidence: 99%

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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: Mechanism Of Regional Pressure Dissipationmentioning

confidence: 99%

Section: Storage Capacitymentioning

confidence: 99%

Section: Storage Capacitymentioning

confidence: 99%

See 1 more Smart Citation

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

Hawez,

Asim

2024

Energies

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Climate Warming Triggered a Glacial Lake Outburst Flood and Debris Flow Events in an Alpine Watershed, Western Himalayas, Tibet Plateau

Ma,

Chen,

et al. 2024

Bull Eng Geol Environ

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Travel distance estimation of landslide-induced debris flows by machine learning method in Nepal Himalaya after the Gorkha earthquake

Qiu,

Geng

2024

Bull Eng Geol Environ

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Debris flows are more likely to be triggered in the earthquake-strike areas with a widespread presence of unstable slopes, causing severe casualties and changing the surrounding natural topography. In such scenario, estimating the travel distance of debris flows becomes crucial to understand the hazardous areas. Therefore, a hybrid machine learning model (GA-XGBoost) was employed to achieve a reliable estimation of debris-flow travel distance. This model was applied to the Nepal Himalayas, the site of the 2015 Gorkha earthquake. We selected four geomorphological factors for travel distance estimation. They are the volume of failure mass (VL), the height difference between the material source center and end point of movement mass (H), the mean gradient of the travel path (J), and the mean curvature of the travel path (C). Furthermore, to eliminate the noise information and enhance stability of input data, a principal component analysis (PCA) was used to generate three principal components (PC1, PC2, and PC3) from the selected factors to serve as input variables of model development. The performance of this model was evaluated using the assessment indexes, resulting in a mean absolute percentage error (MAPE) of 8.71%, a root mean square error (RMSE) of 144.3 m, and a mean absolute error (MAE) of 86.1 m. Four empirical approaches were also introduced for comparison analysis. Our proposed model has proven to be superior and effective, as the estimated results closely match the actual values. All the results affirm the suitability of our developed model for estimating the travel distance of landslide-induced debris flows following a strong earthquake.

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Control mechanisms of pore-pressure dissipation in debris flows

Cited by 3 publications

References 42 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

Climate Warming Triggered a Glacial Lake Outburst Flood and Debris Flow Events in an Alpine Watershed, Western Himalayas, Tibet Plateau

Travel distance estimation of landslide-induced debris flows by machine learning method in Nepal Himalaya after the Gorkha earthquake

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