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2026 Vol.63, Issue 1S Preview Page

Research Paper (Special Issue)

Optimization of CO2 Injection Well Placement and Injection Rates Considering Aquifer Injectivity

대수층 주입특성을 고려한 CO2 주입정 위치 및 주입량 최적화

Soo-Kyung Lim1
,
Ilsik Jang2*
임 수경1
,
장 일식2*
1Department of Advanced Energy & Resources Engineering, Chosun University, Gwangju, Korea
2Department of Advanced Energy Engineering, Chosun University, Gwangju, Korea
1조선대학교 첨단에너지자원공학과
2조선대학교 첨단에너지공학과
*Corresponding Author
28 February 2026. pp. 87-99
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Abstract

In geological CO2 storage, a constant injection rate is often required owing to the operational constraints of CO2 capture and transport infrastructure. This study proposes a stepwise optimization framework to determine optimal injection well placement and a constant injection rate for an aquifer. First, a multilevel grid system was applied under maximum allowable injection pressure conditions to identify the optimal well location. Subsequently, the maximum constant injection rate satisfying the pressure constraint was determined through iterative numerical simulations. The proposed method was applied to high- and low-injectivity aquifer models representing contrasting permeability conditions, and the impact of an additional injection well on CO2 storage capacity was evaluated. The results indicate that the proposed method effectively identifies optimal well locations and constant injection rates while satisfying pressure limits. Storage capacity increased by 6% in the high-injectivity model and by 56% in the low-injectivity model, demonstrating that optimal well number and placement are strongly dependent on aquifer injectivity.

Keywords
geological CO2 storage
injection well placement
injection rate optimization
aquifer injectivity
multi-level grid system

CO2 지중저장에서는 포집 및 운송 인프라의 특성상 저장소에서의 일정한 주입유량을 장기간 유지하는 운영 전략이 요구된다. 본 연구에서는 이러한 운영 조건을 반영하여 대수층을 대상으로 주입정 위치와 일정 주입유량을 단계적으로 최적화하는 방법을 제시하였다. 먼저 최대 허용 주입압력 조건하에서 다단계 격자 시스템을 적용하여 주입정 위치를 탐색하였고, 이후 해당 위치에서 허용 압력 범위를 만족하는 최대 일정 주입유량을 반복 시뮬레이션을 통해 결정하였다. 제안된 방법을 적용하여 유체투과도 차이를 반영한 고주입지수 및 저주입지수 대수층 모델에서 주입정 수 증가에 따른 CO2 저장용량 변화를 비교하였다. 그 결과, 제안된 방법은 압력 제약 조건을 만족하는 범위 내에서 최적 주입정 위치와 일정 주입유량을 효과적으로 도출할 수 있음을 확인하였다. 또한, 고주입지수 모델에서는 주입정 추가에 따른 저장용량 증가가 약 6%에 그친 반면, 저주입지수 모델에서는 약 56% 증가하였다. 이는 대수층 주입특성에 따라 적정 주입정 수와 배치 전략이 달라져야 함을 보여준다.

키워드
CO2 지중저장
주입정 위치 최적화
주입유량 최적화
대수층 주입특성
다단계 격자 시스템
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Information
  • Publisher :The Korean Society of Mineral and Energy Resources Engineers
  • Publisher(Ko) :한국자원공학회
  • Journal Title :Journal of the Korean Society of Mineral and Energy Resources Engineers
  • Journal Title(Ko) :한국자원공학회지
  • Volume : 63
  • No :1
  • Pages :87-99
  • Received Date : 2026-01-08
  • Revised Date : 2026-02-04
  • Accepted Date : 2026-02-06
  • DOI :https://doi.org/10.32390/ksmer.2026.63.1.087
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