동해-1 고갈 가스전을 활용한 이산화탄소 주입 시뮬레이션 연구
A Numerical Modeling of CO2 Injection into the Depleted Donghae-1 Gas Field
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초록
이 연구에서는 국내 최초의 CCS 실증사업으로 추진되고 있는 동해-1 고갈 가스전 대상의 이산화탄소 주입에 대한 저장용량 평가를 수행하였다. 기존의 동해가스전 탄성파 자료 및 시추공 자료 등을활용하여 동해-1 가스전의 신규 저류층 모델을 구축하였으며 이를 활용하여 다양한 주입 시나리오에 따른 이산화탄소 주입 시뮬레이션을 수행하였다. 시뮬레이션 수행 결과, 동해-1 가스전을 활용한 CCS 실증사업의 초기 목표인 연간 40만 톤의 이산화탄소를 최대 약 28년간 안정적으로 주입할수 있는 저장용량을 가진 것으로 나타났으며 지구역학 시뮬레이션 연구 등 추가 연구 결과들과 함께 실증사업의 기초자료로 활용할 예정이다.
Abstract
In this study, we evaluated the storage capacity of carbon dioxide injection into the depleted reservoirs of the Donghae-1 gas field, which is being promoted as Korea’s first Carbon Capture and Storage (CCS) demonstration project. A new reservoir model for the Donghae-1 gas field was constructed using existing seismic and well data for the Donghae gas field, through which carbon dioxide injection simulations were performed according to various injection scenarios. As a result of the simulation, it was found that the Donghae-1 gas field has a safe storage capacity of 400,000 tons of carbon dioxide injection per year for up to about 28 years; this is the initial target rate of the CCS demonstration project using the Donghae-1 gas field. These will be used as basic data for the project along with the results of additional research, such as the Geomechanics study.
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