Simulation of CO2 Storage and Enhanced Gas Recovery in Shale Gas Reservoirs Considering Adsorption Characteristics

Won Suk Lee; Young Min Kim

doi:10.32390/ksmer.2022.59.5.562

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2022 Vol.59, Issue 5S Preview Page Next Page

Research Paper

Simulation of CO₂ Storage and Enhanced Gas Recovery in Shale Gas Reservoirs Considering Adsorption Characteristics 셰일저류층 흡탈착 특성을 고려한 이산화탄소 저장-회수증진 시뮬레이션 연구

31 October 2022. pp. 562-575

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Abstract

In this study, we examined the performance of CO₂ injection techniques based on simulations in a conceptual shale reservoir to investigate the efficiency of CO₂ storage and enhanced gas recovery (CS-EGR). The developed conceptual model considers major shale reservoir characteristics in which the adsorption properties are the focus as a control parameter. For simple depletion cases, the production performance was directly dependent on the adsorption properties. However, in the CO₂ injection cases, the adsorption and desorption processes are more complicated and we did not identify remarkable increases in the recovery factor, but we observed a weak relationship with the Langmuir volume. The results of all CO₂ injection cases showed that the storage efficiency was more than 80%, indicating that shale reservoirs are a promising target for CO₂ storage. To increase the recovery factor and improve the optimum control of CS-EGR, other major shale reservoir properties and operational parameters should be simultaneously integrated.

Keywords

CS-EGR

Shale Reservoir

Adsorption

Simulation

이 연구에서는 셰일저류층을 대상으로 이산화탄소 주입에 따른 저장-회수증진 복합거동 특성을 분석하였다. 실제 셰일저류층 자료를 기반으로 개념모델을 구축하였으며, 이산화탄소 주입에 따른 저장 및 회수증진에 큰 영향을 미칠 것으로 예상되는 흡탈착 특성에 따른 시뮬레이션 결과를 비교하였다. 단순 감압에 의한 생산량은 흡탈착 특성에 직접적인 영향을 받으며, 이산화탄소 주입의 경우 생산량 및 저장량은 메탄 및 이산화탄소의 흡탈착 특성이 복합적으로 작용하여 큰 차이를 보이지 않지만, 흡착 용량과의 상관성을 관측할 수 있었다. 저장효율 측면에서는 80% 이상의 셰일저류층 대상 이산화탄소 처분이 가능할 것으로 판단되나, 회수증진 관점에서는 흡탈착 특성에 의한 영향이 미약하기 때문에 추가적인 저류층 물성과의 연계 및 다양한 주입 공법 적용 등을 동시에 고려한 운영 최적화 분석이 필요할 것으로 판단된다.

키워드

이산화탄소 지중저장-회수증진

셰일저류층

흡탈착

시뮬레이션

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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 : 59
No :5
Pages :562-575
Received Date : 2022-09-15
Revised Date : 2022-10-24
Accepted Date : 2022-10-26
DOI :https://doi.org/10.32390/ksmer.2022.59.5.562

Journal of the Korean Society of Mineral and Energy Resources Engineers ISSN:2288-0291(Print) 2288-2790(Online) 한국자원공학회지

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