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The Development of Straddle Packer Hydraulic Testing Equipment to Characterize Permeability in Deep Boreholes  

Kim, Kyung-Su (Radioactive Waste Technology Development Dept., Korea Atomic Energy Research Institute)
Park, Kyung-Woo (Radioactive Waste Technology Development Dept., Korea Atomic Energy Research Institute)
Ji, Sung-Hoon (Radioactive Waste Technology Development Dept., Korea Atomic Energy Research Institute)
Publication Information
The Journal of Engineering Geology / v.20, no.2, 2010 , pp. 213-220 More about this Journal
Abstract
The permeability characterization on the natural barrier for deep geological disposal of radioactive waste is very critical to evaluate total safety and performance assessment of disposal site. However, the confidence level in using previous hydraulic testing equipments consist of simple components to estimate rock mass permeability is not high enough to reflect in situ condition. The purpose of this research is to establish an advanced hydraulic testing equipment, which is applicable to deep borehole (up to 1,000 m), through the improvement of technical problems of previous packer systems. Especially, the straddle packer hydraulic testing equipment was designed to adopt both the hydraulic downhole shut-in valve(H-DHSIV) to minimize the wellbore storage effect and the real time data acquisition system to measure the pressure changes of test interval including its upper and lower parts. The results from this research lead to not only improve current technical level in the field of hydraulic testing but also provide important information to radioactive waste disposal technology development and site characterization project.
Keywords
hydraulic test; straddle packer system; downhole equipment; pressure sensor; hydraulic downhole shut-in valve(H-DHSIV);
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  • Reference
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