Analysis of the Leakage Possibility of Injected CO<sub>2</sub> in a Saline Aquifer

Lee, Youngsoo; Kim, Kihong; Sung, Wonmo; Yoo, Inhang

doi:10.1021/ef100073m

Cited by 25 publications

(13 citation statements)

References 15 publications

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“…The density of supercritical CO2 in saline reservoirs is about 0.6-0.7 g/cm 3 , which is lower than the density of saline formation water, thus causing CO2 to rise towards the caprock due to buoyancy force [53,54]. To assure long-term CO2 storage, the host basin must be considerably large and the caprock must possess a good sealing capacity [55].…”

Section: Saline Aquifersmentioning

confidence: 99%

A review of developments in carbon dioxide storage

et al. 2017

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Carbon capture and storage (CCS) has been identified as an urgent, strategic and essential approach to reduce anthropogenic CO2 emissions, and mitigate the severe consequences of climate change. CO2 storage is the last step in the CCS chain and can be implemented mainly through oceanic and underground geological sequestration, and mineral carbonation. This review paper aims to provide state-of-the-art developments in CO2 storage. The review initially discussed the potential options for CO2 storage by highlighting the present status, current challenges and uncertainties associated with further deployment of established approaches (such as storage in saline aquifers and depleted oil and gas reservoirs) and feasibility demonstration of relatively newer storage concepts (such as hydrate storage and CO2-based enhanced geothermal systems). The second part of the review outlined the critical criteria that are necessary for storage site selection, including geological, geothermal, geohazards, hydrodynamic, basin maturity, and economic, societal and environmental factors. In the third section, the focus was on identification of CO2 behaviour within the reservoir during and after injection, namely injection-induced seismicity, potential leakage pathways, and long-term containment complexities associated with CO2-brine-rock interaction. In addition, a detailed review on storage capacity estimation methods based on different geological media and trapping mechanisms was provided. Finally, an overview of major CO2 storage projects, including their overall outcomes, were outlined. This review indicates that although CO2 storage is a technically proven strategy, the discussed challenges need to be addressed in order to accelerate the deployment of the technology. In addition, beside the necessity of technoeconomic aspects, public acceptance of CO2 storage plays a central role in technology deployment, and the current ethical mechanisms need to be further improved.

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Section: Saline Aquifersmentioning

confidence: 99%

A review of developments in carbon dioxide storage

et al. 2017

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“…It is believed that CO 2 injection into brine saturated cores affect core permeability [30,[41][42][43][44][45][46]. Thus, different injection pressures (1-7 MPa) at the constant confining pressure of 10 MPa and temperature of 100 °C were applied.…”

Section: Results and Discussion 31 Effect Of Injection Pressure On mentioning

confidence: 99%

CO2 Storage in Low Permeable Carbonate Reservoirs: Permeability and Interfacial Tension (IFT) Changes During CO2 Injection in an Iranian Carbonate Reservoir

Karaei

Honarvar

Azdarpour

et al. 2019

Period. Polytech. Chem. Eng.

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The lack of fundamental experimental studies on low permeable carbonate reservoirs for CO2 sequestration purposes is essential for further application of CO2 sequestration as a highly-anticipated CO2 mitigation method in deep saline aquifers, specifically those with low permeabilities. The core samples were taken from a carbonate reservoir in Iran and the brine composition was based on that of the same formation. The objective of this study is to investigate permeability alteration during CO2 sequestration in the aquifers of a low permeable Iranian carbonate reservoir. Various parameters have been investigated. The effects of different parameters such as injection pressure, confining pressure, and temperature on permeability alteration of the cores was investigated. Moreover, the interfacial tension (IFT) of CO2/brine was also determined at pressures and temperatures up to 7 MPa and 100 °C, respectively. The experimental results showed CO2 solubility and rock dissolution to be the governing mechanism when CO2 was injected into carbonate cores. The permeability measurements showed that permeability increases by increasing injection pressure and decreases by increasing confining pressure and temperature. The IFT measurement results showed that the IFT decreases significantly when there is an increase in pressure and temperature.

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“…The purpose of carbon capture, utilization, and storage (CCUS) is to reduce the amount of CO 2 released into the atmosphere to help mitigate the effects of anthropogenic climate change. − CO 2 can be injected into structural reservoirs in deep geological formations such as depleted oil and gas reservoirs, saline aquifers, and unmineable coal seams. − Using CO 2 for enhanced oil recovery (EOR) is common in the oil industry, but most CO 2 is usually produced from natural, geological sources. CCUS uses anthropogenic sources of CO 2 for EOR.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of CO₂ Storage Mechanisms in CO₂ Enhanced Oil Recovery Sites: Application to Morrow Sandstone Reservoir

et al. 2016

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This article presents numerical simulations of CO2 storage mechanisms in the Pennsylvanian Upper Morrow sandstone reservoir, locally termed the Morrow B sandstone in the Farnsworth Unit (FWU) of Ochiltree County, Texas. The CO2 storage mechanisms considered in the study under a CO2 enhanced oil recovery (EOR) mode include structural-stratigraphic trapping, CO2 dissolution in formation water and oil, and residual trapping. The reservoir simulation model was constructed on the basis of field geophysical, geological, and engineering data such as three-dimensional surface seismic data, well logs, and fluid analysis. A representative fluid sampled from the reservoir was analyzed and used to tune the equation of state. A thermodynamic minimum miscible pressure was subsequently computed and compared to the experimental outcome. A history-matched model was constructed and used as a baseline to determine the effects of different hypothetical injection strategies (that consider CO2 purchase, gas recycling, and infill drilling), water-alternating-gas (WAG) schemes, and variable salinity on CO2 storage. The simulation results showed that a significant amount of stored CO2 was dissolved in residual oil, contributing to enhanced oil recovery from the tertiary stage of the field operations. Supercritical-phase CO2 mass within the reservoir compared to CO2 dissolved in formation water was found to be dependent on the CO2 injection strategy. The residual trapping contribution was significant when hysteresis was considered. Pressure, volume of reservoir fluid present, caprock integrity, and optimized WAG injection strategies were significant parameters determining the long-term CO2 storage capacity within the FWU. Caprock integrity analyses showed that sealing units have excellent storage capacity with the potential to support column heights of up to 10000 ft. This work shows an improved strategy of maximizing CO2 storage within a depleted oil reservoir. The results from this study show that pressure changes within the reservoir should be continuously monitored to enhance CO2 storage. This study serves as a benchmark for future CO2-EOR projects in the Anadarko basin or geologically similar basins throughout the world.

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Analysis of the Leakage Possibility of Injected CO₂ in a Saline Aquifer

Cited by 25 publications

References 15 publications

A review of developments in carbon dioxide storage

A review of developments in carbon dioxide storage

CO2 Storage in Low Permeable Carbonate Reservoirs: Permeability and Interfacial Tension (IFT) Changes During CO2 Injection in an Iranian Carbonate Reservoir

Evaluation of CO₂ Storage Mechanisms in CO₂ Enhanced Oil Recovery Sites: Application to Morrow Sandstone Reservoir

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Analysis of the Leakage Possibility of Injected CO2 in a Saline Aquifer

Cited by 25 publications

References 15 publications

A review of developments in carbon dioxide storage

A review of developments in carbon dioxide storage

CO2 Storage in Low Permeable Carbonate Reservoirs: Permeability and Interfacial Tension (IFT) Changes During CO2 Injection in an Iranian Carbonate Reservoir

Evaluation of CO2 Storage Mechanisms in CO2 Enhanced Oil Recovery Sites: Application to Morrow Sandstone Reservoir

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Analysis of the Leakage Possibility of Injected CO₂ in a Saline Aquifer

Evaluation of CO₂ Storage Mechanisms in CO₂ Enhanced Oil Recovery Sites: Application to Morrow Sandstone Reservoir