CO2 Sequestration - A Safe Transition Technology

Sengul, Mahmut

doi:10.2523/98617-ms

Cited by 8 publications

(4 citation statements)

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“…This critical depth varies with the pressure gradient, surface temperature, and geothermal gradients 10,26 and is approximately 800 m, based on average conditions worldwide. 5,27 In the present work, the shallow region above the critical depth was classified into two zones: a gas zone and a transition zone, according to CO 2 phases within the initial reservoir pressure and the maximum bottom-hole pressure. The transition zone was defined as the CO 2 phase transition zone between an absolute gaseous CO 2 phase zone and an absolute supercritical zone within the pressure range for CO 2 injection (Fig.…”

Section: Definition Of a Transition Zonementioning

confidence: 99%

“…C O 2 in the atmosphere can be reduced through the geological sequestration of CO 2 in saline aquifers in large quantities, as demonstrated by carbon capture and storage (CCS) projects undertaken since the early 1990s. [1][2][3][4][5][6][7] CCS is the only technology that can reduce CO 2 emissions on a large scale. 8 Globally, 22 large-scale CCS projects are in operation or under construction and another 21 large-scale CCS projects are in development planning, for a total capture capacity of 80 million tonnes per annum (Mtpa).…”

Section: Introductionmentioning

confidence: 99%

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Feasibility of CO₂ sequestration in shallow transition zones

et al. 2017

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Geological CO2 sequestration requires suitable storage sites to store CO2 at a large scale. Shallow aquifers could be a viable regional solution for stationary CO2 emitters because of their broad distribution, considerable capacity, and the potential low drilling cost associated with the shallow depths. This study introduces a shallow transition zone in which CO2 can transit from a gaseous phase into supercritical CO2 within the pressure range for CO2 injection; thus, considerable storage capacity is expected. The characteristics and major influencing factors of shallow transition zone storage were compared with those of deep storage to determine the feasibility of CO2 sequestration in shallow transition zones. The transition zone was found to provide a comparable storage capacity, greater storage efficiency, and a higher proportion of stable CO2 than a deep aquifer. The depth of this transition zone can be as shallow as 537 m for a warm basin and 656 m for a cold basin. At a depth of 600–1000 m, the primary factors affecting CO2 storage capacity are formation thickness and porosity, with reservoir heterogeneity and depth having lesser effects. Therefore, depth is of less concern when estimating CO2 storage potential. This work explored the transition zone as an effective new option when seeking means of sequestering CO2. These results not only establish parameters for CO2 sequestration in shallow aquifers, but also strengthen the current understanding of CO2 sequestration in deep aquifers. © 2017 Society of Chemical Industry and John Wiley & Sons, Ltd.

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Section: Definition Of a Transition Zonementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Feasibility of CO₂ sequestration in shallow transition zones

et al. 2017

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“…CO2 지중격리가 가능한 지질구조로는 고갈 유가스 전, 심부 대염수층, 석탄층 등이 있다 [3][4][5]. 이 중 고갈 유가스전은 석유 또는 가스가 부존되어 있던 구조로 서 CO2를 안정적으로 격리할 수 있으며 생산중인 유 가스전의 경우 탐사과정이나 생산기간 동안의 저류층 특성규명 작업을 통해 지층의 불균질 정보가 파악되 어 있으므로 그 비용을 줄일 수 있다는 장점이 있으나 유가스전의 분포가 특정 지역에 편중되어 있다는 단 점이 있다 [7][8][9].…”

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Development of the Efficiency-Evaluation Model for the Mechanism of CO₂Sequestration in a Deep Saline Aquifer

Kim¹,

Lee²,

Lee³

2012

Journal of the Korean Institute of Gas

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-The practical way to minimize the greenhouse gas is to reduce the emission of carbon dioxide. For this reason, CCS(Carbon Capture and Storage) technology, which could reduce carbon dioxide emission, has risen as a realistic alternative in recent years. In addition, the researcher is recently working into ways of applying CCS technologies with deep saline aquifer. In this study, the evaluation model on the feasibility of CO2 sequestration in the deep saline aquifer using ANN(Artificial Neural Network) was developed. In order to develop the efficiency-evaluation model, basic model was created in the deep saline aquifer and sensitivity analysis was performed for the aquifer characteristics by utilizing the commercial simulator of GEM. Based on the sensitivity analysis, the factors and ranges affecting CO2 sequestration in the deep saline aquifer were chosen. The result from ANN training scenario were confirmed CO2 sequestration by solubility trapping and residual trapping mechanism. The result from ANN model evaluation indicated there is the increase of correlation coefficient up to 0.99. It has been confirmed that the developed model can be utilized in feasibility of CO2 sequestration at deep saline aquifer.

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“…Concerns about global warming and challenges of CO 2 emission reduction highlight the need to develop effective and economical means for CO 2 sequestration (Brooks 1950;Metz et al 2005;Bachu 2000;Bryant 2007;Gibson-Poole et al 2007;Sengul 2006). In subsurface CO 2 sequestration, a large amount of CO 2 is injected into deep aquifers.…”

Section: Introductionmentioning

confidence: 99%

Effects of ultrasonic waves on carbon dioxide solubility in brine at different pressures and temperatures

et al. 2017

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The adverse impacts of CO 2 emission on the global warming highlight the importance of carbon capture and storage technology and geological storage of CO 2 under solubility trapping mechanisms. Enhancing the solubility of CO 2 in formation water has always been the focus of research in the area of CO 2 sequestration. Ultrasound techniques are one of the environmentally friendly methods that use high-intensity acoustic waves to improve gas solubility in liquids. Ultrasonic waves can alter the properties of different phases that lead to chemical reactions and provide a means to increase the solubility of CO 2 in connate water. In this study, we investigated the effects of ultrasound on the solubility of CO 2 in connate water under different conditions of pressure, temperature, and salinity. The results showed that the solubility of CO 2 was improved with increasing pressure under ultrasonic effects. However, the solubility of CO 2 was inversely proportional to the increase in brine salinity and temperature. Therefore, it was concluded that the solubility of CO 2 might be enhanced in the presence of ultrasound.

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CO2 Sequestration - A Safe Transition Technology

Cited by 8 publications

References 0 publications

Feasibility of CO₂ sequestration in shallow transition zones

Feasibility of CO₂ sequestration in shallow transition zones

Development of the Efficiency-Evaluation Model for the Mechanism of CO₂Sequestration in a Deep Saline Aquifer

Effects of ultrasonic waves on carbon dioxide solubility in brine at different pressures and temperatures

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CO2 Sequestration - A Safe Transition Technology

Cited by 8 publications

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Feasibility of CO2 sequestration in shallow transition zones

Feasibility of CO2 sequestration in shallow transition zones

Development of the Efficiency-Evaluation Model for the Mechanism of CO2Sequestration in a Deep Saline Aquifer

Effects of ultrasonic waves on carbon dioxide solubility in brine at different pressures and temperatures

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Feasibility of CO₂ sequestration in shallow transition zones

Feasibility of CO₂ sequestration in shallow transition zones

Development of the Efficiency-Evaluation Model for the Mechanism of CO₂Sequestration in a Deep Saline Aquifer