지질공학 (The Journal of Engineering Geology)

  • 제13권3호
  • /
  • Pages.281-292
  • /
  • 2003
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  • 1226-5268(pISSN)
  • /
  • 2287-7169(eISSN)
대한지질공학회 (The Korean Society of Engineering Geology)
권호 표지

공내수 전기전도도의 자동측정시스템 구축을 위한 실험

An Experiment for determining Electrical Conductivity in Modelholes using Continuous Measurement System

  • 김영화 (강원대학교 지구물리학과) ;
  • 박정빈 (강원대학교 지구물리학과) ;
  • 임헌태 (강원대학교 지구물리학과)
  • 발행 : 2003.09.01
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초록

모형시추공 내에서 공내수 전기전도도의 자동 측정시스템을 구축하고 이로부터 수리상수 결정과 관련된 제반 기초 환경을 검증하였다. 실험은 상대적으로 높은 염도를 공내수로 하고 증류수를 지층수로 사용하여 지층수의 유입과 유출되는 유량을 일정하게 유지한 상태에서 공내수의 전기전도도 프로파일을 구하는 방식으로 이루어졌다. 관찰의 주 대상은 공내수와 지층수 사이의 염도차. 온도차 및 지층수의 유입량. 유입 ·유출구에 따른 모형시추공 내에서의 전기전도도 변화 양상 파악에 있었다. 실헌결과, 이들 요인이 미치는 영향범위와 적정 측정 환경이 제시되어 향후 모델 실험 및 원위치시험에서 적용될 기초실험 여건이 마련되었다.

We setup a continuous measurement system for electrical conductivity of fluid in a model borehole and verified the basic environments in electrical conductivity measurement for estimating hydraulic constants. The experiment was made by monitoring the conductivity change within the hole using NaCI solution of different salinities and incoming formation fluid using distilled water. The experiment was made under the state of constant flow rate by maintaining balance between inflow and outflow. Conductivity variation features were observed by controlling salinity contrasts and temperature differences between fluid within the hole and incoming formation fluid. flow rate and the location of inlet and outlet. The results of the experiment show well the role of each affecting factor on the conductivity distribution. and suggest appropriate environments for conductivity measurements. It is considered that the basis of the conductivity measurement for henceforward laboratory model and/or in-situ borehole experiment has been prepared.

키워드

참고문헌

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