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A Hybrid Optimization Methodology Identifying Optimal Operating Conditions for Carbon Dioxide Injection in Geologic Carbon Sequestration

Title
A Hybrid Optimization Methodology Identifying Optimal Operating Conditions for Carbon Dioxide Injection in Geologic Carbon Sequestration
Authors
Piao, JizeHan, Weon ShikKang, Peter K.Min, BaehyunKim, Kue-YoungHan, GidonPark, Jong Gil
Ewha Authors
민배현
Issue Date
2020
Journal Title
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
ISSN
1750-5836JCR Link

1878-0148JCR Link
Citation
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL vol. 98
Keywords
CO2 injectioncoupled wellbore-reservoir modelproxy modelingmulti-objective optimizationPareto-optimal solutions
Publisher
ELSEVIER SCI LTD
Indexed
SCIE; SCOPUS WOS scopus
Document Type
Article
Abstract
Prior to determining the optimal operating parameters for CO2 injection, conditions for both injection wellbore and storage formation should be evaluated; the build-up pressure induced by the CO2 injection could promote fractures in the storage formation, even collapsing the wellbore. In this study, a hybrid optimization metho-dology, which combined the proxy modeling and multi -objective optimization, was engaged in searching ap-propriate operating conditions for CO2 injection. The study utilized a fully coupled wellbore-reservoir (WR) model to simulate the CO2 injection scenarios. Three responses, such as pressure, temperature, and CO2 mass flow rate at the bottom-hole of injection wellbore, were investigated. To reduce the computational cost, the statistical proxy models were developed for approximating three responses. The developed fine-tuned proxy models revealed four influential factors; wellhead pressure, injected CO2 temperature, wellbore diameter, and permeability of a storage formation were significant in predicting three responses. Among these four influential factors, permeability was treated to be an uncertainty factor, while the other three factors were treated as tuning factors. According to acquired optimal solution sets, the optimum values for wellhead pressure and injected CO2 temperature were distributed around 10.0 MPa and 35 degrees C, respectively. For the wellbore diameter, its mean of optimal solutions was 0.1 m, and more solutions were concentrated at this mean value with a decrease in permeability.
DOI
10.1016/j.ijggc.2020.103067
Appears in Collections:
엘텍공과대학 > 기후·에너지시스템공학전공 > Journal papers
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