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http://dx.doi.org/10.9720/kseg.2018.1.069

Detection of Potential Flow Paths of Leaked CO2 from Underground Storage Using Electrical Resistivity Survey  

Lim, Woo-Ri (Department of Geological Sciences, Pusan National University)
Hamm, Se-Yeong (Department of Geological Sciences, Pusan National University)
Hwang, Hak-Soo (Tomory Co., Ltd.)
Kim, Sung-Wook (GI Co., Ltd.)
Jeon, Hang-Tak (Department of Geological Sciences, Pusan National University)
Publication Information
The Journal of Engineering Geology / v.28, no.1, 2018 , pp. 69-79 More about this Journal
Abstract
The Korean government attempts to reduce $CO_2$ emissions by 37% to 314.7 Mt $CO_2$, down from the estimated 850.6 Mt $CO_2$ until 2030 in order to confront green house effect. In this context, in 2014, Korean government launched $CO_2$ Storage Environmental Management Research (K-COSEM) Center for carrying out pilot-scale research on $CO_2$ leakage from underground $CO_2$ storage facilities. For the detection of $CO_2$ leakage, it is necessary to identify hydrologeological and geophysical characteristics of the subject area. In the study site of Naesan-ri, Daeso-myeon, Eumseong-gun, Chungbuk Province, two times injection tests (June 28-July 24, 2017 and August 07-September 11, 2017) of $CO_2$ and $SF_6$ dissolved waters, respectively, was conducted to understand the leakage behavior of $CO_2$ from underground. The injection well was drilled to a depth of 24 m with a 21-m casing and screen interval of 21~24 m depth. Two times resistivity surveys on August 18, 2017 and September 1, 2017, were conducted for revealing the flow of the injected water as well as the electrical properties of the study site. The study results have shown that the high-resistivity zone and the low-resistivity zone are clearly contrasted with each other and the flow direction of the injected water is similar to natural groundwater flow. Besides, the low resistivity zone is widely formed from the depth of injection to the shallow topsoil, indicating that the weathered zone of high permeability has high $CO_2$ leakage potential.
Keywords
carbon capture and storage (CCS); $CO_2$ leakage; electrical resistivity survey; hydrogeological characteristics; green house effect;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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