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Research Paper

Modeling and Simulation of an Integrated CO2 Transport-Injection-Storage System for Geological Sequestration in a Depleted Gas Field

고갈가스전의 CO2 지중저장을 위한 CO2 수송-주입-저장 통합 시스템의 모델링 및 시뮬레이션 연구

Minkyung Chae1
,
Suin Choi1
,
Soeun Yoon1
,
Tea-Woo Kim2
,
Baehyun Min1*
채 민경1
,
최 수인1
,
윤 소은1
,
김 태우2
,
민 배현1*
1Department of Climate and Energy Systems Engineering, Ewha Womans University, Seoul, Korea
2CO2 Geological Storage Research Center, Climate Change Response Research Department, Korea Institute of Geoscience and Mineral Resources, Daejeon, Korea
1이화여자대학교 기후에너지시스템공학과
2한국지질자원연구원 기후변화대응본부 CO2 지중저장연구센터
*Corresponding Author
30 April 2025. pp. 111-127
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Abstract

This study investigated integrated modeling and simulation of a geological CO2 storage system in a depleted gas field. The integrated CO2 transport-injection-storage system consists of a reservoir model and a facility model that includes an onshore CO2 source, subsea pipelines, offshore platforms, and injection wells. The reservoir model characteristics, such as model size, grid system, faults, and permeability, were set based on literature on a depleted gas field in Australia. Facility specifications such as well locations and subsea pipeline trajectories were set based on literature on the operational plans of a CCS (Carbon Capture and Storage) project. Using the integrated model, we conducted a numerical simulation injecting 10 MtCO2 per annum for 20 years. We also analyzed the cumulative CO2 injection and pressure changes under the maximum allowable injection pressure conditions. The procedure of this study can be applied to integrated modeling of various geological CO2 storage systems.

Keywords
depleted gas field
geological CO2 storage
integrated CO2 transport-injection-storage system

본 연구는 고갈가스전을 대상으로 CO2 지중저장 시스템의 통합 모델링 및 시뮬레이션을 수행하였다. CO2 수송-주입-저장 과정을 포함하는 통합 시스템은 육상 허브 터미널, 해저 파이프라인, 해상 플랫폼, 주입정 등 설비 모델과 저장층 모델을 구성한 후 연계하여 구축하였다. 저장층 모델은 고갈가스전에 관한 문헌을 바탕으로 저장층 규모, 격자 구조, 단층, 유체투과율 등을 설정하였다. 주입정 위치, 해저 파이프라인의 궤도 등 설비 정보는 고갈가스전의 CO2 지중저장 전환 및 운영 계획에 관한 문헌을 바탕으로 설정하였다. 구축한 CO2 지중저장 시스템의 통합 모델을 이용하여 연간 약 1천만 톤의 CO2를 20년간 주입하는 시뮬레이션을 수행하였다. 이를 통해 최대 허용 주입 압력 조건 하에서의 CO2 누적 주입량과 압력 변화 등 거동 양상을 분석하였다. 본 연구가 수행한 방법론과 절차는 향후 다양한 CO2 지중저장 시스템의 통합 모델 분석에 활용될 수 있을 것으로 기대한다.

키워드
고갈가스전
CO2 지중저장
CO2 수송-주입-저장 통합 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 : 62
  • No :2
  • Pages :111-127
  • Received Date : 2025-01-22
  • Revised Date : 2025-03-14
  • Accepted Date : 2025-03-18
  • DOI :https://doi.org/10.32390/ksmer.2025.62.2.111
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