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Assessment of CO2 Geological Storage Capacity for Basalt Flow Structure around PZ-1 Exploration Well in the Southern Continental Shelf of Korea
남해 대륙붕 PZ-1 시추공 주변 현무암 대지 구조의 CO2 지중저장용량 평가
Econ. Environ. Geol. 2020 Feb;53(1):33-43
Published online February 28, 2020;  https://doi.org/10.9719/EEG.2020.53.1.33
Copyright © 2020 the Korean society of economic and environmental gelology.

Seung Yong Shin1,2, Moohee Kang1*, Young Jae Shinn1 and Snons Cheong1
신승용1,2 · 강무희1* · 신영재1 · 정순홍1

1Korea Institute of Geoscience and Mineral Resources
2Department of Astronomy, Space Science, & Geology, Chungnam National University
1한국지질자원연구원, 2충남대학교 우주지질학과
Received October 28, 2019; Revised February 3, 2020; Accepted February 26, 2020.
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
 Abstract
CO2 geological storage is currently considered as the most stable and effective technology for greenhouse gas reduction. The saline formations for CO2 geological storage are generally located at a depth of more than 800 m where CO2 can be stored in a supercritical state, and an extensive impermeable cap rock that prevents CO2 leakage to the surface should be distributed above the saline formations. Trough analysis of seismic and well data, we identified the basalt flow structure for potential CO2 storage where saline formation is overlain by basalt cap rock around PZ-1 exploration well in the Southern Continental Shelf of Korea. To evaluate CO2 storage capacity of the saline formation, total porosity and CO2 density are calculated based on well logging data of PZ-1 well. We constructed a 3D geological grid model with a certain size in the x, y and z axis directions for volume estimates of the saline formation, and performed a property modeling to assign total porosity to the geological grid. The estimated average CO2 geological storage capacity evaluated by the U.S. DOE method for the saline formation covered by the basalt cap rock is 84.17 Mt of CO2(ranges from 42.07 to 143.79 Mt of CO2).
Keywords : CO2 geological storage, greenhouse gas reduction, basalt flow, 3D geological model, storage capacity

 

February 2020, 53 (1)