암석 시료의 유도분극 측정을 위한 전극배열 비교
A Study on Electrode Array for Measurement of Induced Polarization of Rock Samples
1
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
국내에서 널리 사용되는 전기비저항과 유도분극탐사는 지하 매질 정보를 얻는 대표적인 물성인 전기적성질을 측정하는 방법이다. 다양한 현장에서 획득하는 탐사 자료에 대한 정밀한 해석을 위해서는 매질의물성 정보를 정확하게 측정하는 것이 중요하다. 암석의 전기적 물성 측정은 전류 전극과 전위 전극을 동일한 전극으로 사용하는 2전극법과 전류 전극과 전위 전극을 분리하여 측정하는 4전극법으로 구분된다. 2전극법은 4전극법에 비해 시료와 전극의 접촉이 매우 용이하므로 일반적으로 많이 사용되고 있지만, 시료뿐만 아니라 전극의 임피던스가 함께 측정된다는 문제가 있다. 이 연구에서는 유도분극 특성을 갖지않는 물시료와 유도분극 특성을 갖는 흑연과 시멘트를 혼합한 인공 시료에 대하여 2전극법과 4전극법을사용하여 시간영역 유도분극 효과를 측정하고 그 결과를 비교하였다. 또한, 현장탐사를 모사한 수조모형실험으로 두 전극법의 결과와 비교하여, 모형실험과 4전극법의 결과가 잘 일치하는 것을 확인하였다. 따라서, 4전극법이 전위전극의 설치에 어려움이 있지만 2전극법에 비해 전위전극의 임피던스에 의한 문제를 줄일 수 있어 전기적 물성 측정에 효과적임을 확인하였다.
Abstract
Measurement of the physical properties of rocks or minerals is an important factor in determining the distribution of the underground medium as well as mineral resource investigations. Resistivity and induced polarization, which are widely used in Korea, are methods for measuring electrical properties, which are representative properties of obtaining subsurface information. In order to precisely analyze the exploration data obtained from various sites, it is important to accurately measure the material properties. Electrical properties of rock is measured using two-electrode or four-electrode method. Compared to the four-electrode method, the two-electrode method is generally used because it is very easy to contact the sample and the electrode, but there is a problem in that the impedance of the electrode and the sample is measured together. In this study, the time-domain the induced polarization effects were measured using the 2-electrode method and the 4-electrode method for artificial samples mixed with graphite and cement having induced polarization characteristics, and the results were compared. Although the 4-electrode method has difficulties in installing potential electrodes, it was confirmed that it is effective in measuring electrical properties because it can reduce the problem caused by the impedance of potential electrodes compared to the 2-electrode method.
참고문헌 (21)
- Binley, A., "Resistivity and induced polarization: Theory and applications to the near-surface earth", pp.104~ (2020), Cambridge University Press
- Binley, A., "Relationship between spectral induced polarization and hydraulic properties of saturated and unsaturated sandstone", Water Resour. Res, 41, pp.W12417~ (2005)
- Börner, F. D., "Evaluation of transport and storage preoperties in the soil and groundwater zone from induced polarization measurements", Geophysical Prospecting, 44, pp.583~601 (1996)
- Gomaa, M. M., "Effect of electrode contact impedance on a. c. electrical properties of wet hematite sample", Mar Geophys Res, 30(4), pp.265~276 (2009)
- Kearey, P., "An Introduction to Geophysical Exploration", pp.183~203 (2002), Blackwell Science
- Kemna, A., "An overview of spectral induced polarization method for near-surface application", Near Surf. Geophys, 10, pp.453~468 (2012)
- Kim, J.H., "DC2DPro-2D interpretation system of DC Resistivity Tomography. User's Manual and Theory", Korean Institute of Geoscience and Mineral Resources, ~ (2009)
- Olhoeft, G. R., "Low-frequency electrical properties", Geophysics, 50, pp.145~162 (1985)
- Paik, W. K., "Electrochemistry(Science and Technology of Electrode Processes)" (2012), KYOMUNSA(cheongmoongak)
- Palacky, G. V, "Resistivity characteristics of geologic targets", Electromagnetic Methods in Applied Geophysics, 1, pp.1351~ (1987)
- 박삼규, "지반의 전기비저항을 좌우하는 물성요인", 물리탐사, 7(2), pp.130~135 (2004), 한국물리탐사학회
- Pelton, W. H., "Mineral discrimination and removal of inductive coupling with multifrequency IP", Geophysics, 43(3), pp.588~609 (1978)
- Revil, A., "Determination of permeability from spectral induced polarization in granular media", Geophysical Journal International, 181(3), pp.1480~1498 (2010)
- Rust, C. F., "Electrical Resistivity Measurements on Reservoir Rock Samples by the Two-Electrode and Four-Electrode Methods", J Pet Technol, 4(09), pp.217~224 (1952)
- Schwan, H. P., "Electrode polarization impedance and measurements in biological materals", Annals of the New York Academy of Sciences, 148, pp.191~209 (1968)
- Seigel, H. O., "Mathematical formulation and type curve for induced polarizaion", Geophysics, 24(3), pp.547~565 (1959)
- Telford, W. M., "Applied Geophysics" (1990), Cambridge University Press
- Ulrich, C., "Induced polarization measurements on unsaturated, unconsolidated sands", Geophysics, 69(3), pp.762~771 (2004)
- Vanhala, H., "Laboratory technique for measurement of spectral induced polarization response of soil samples", Geophysical Prospecting, 43(5), pp.655~676 (1995)
- Ward, S. H., "Recommendations on IP research", The Leading Edge, 14, pp.243~247 (1995)
- Zisser, N., "Relationship between low-frequency electrical properties and hydraulic permeability of low-permeability sandstones", Geophysics, 75(3), pp.E131~E141 (2010)