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A Suggested Method for Predicting Permeability of Porous Sandstone Using Porosity and Drying Rate

공극률과 건조율을 이용한 다공질 사암의 투과도 추정방법 제안

  • Ko, Eunji (Dongnam Regional Infrastructure Technology Management Center) ;
  • Kim, Jinhoo (Dong-A University, Department of Energy and Mineral Resources Engineering)
  • 고은지 (동남권 건설교통기술 지역거점센터) ;
  • 김진후 (동아대학교 에너지.자원공학과)
  • Received : 2014.04.07
  • Accepted : 2014.08.11
  • Published : 2014.08.31

Abstract

As the permeability is an important parameter to characterize the ease with which a porous medium transmits fluids, it is usually obtained by fluid flow experiment using core samples. In order to measure the permeability, however, an experimental apparatus is required and it might take long measurement time, especially for tight samples. In this study, the relationship between permeability and porosity as well as drying rate has been investigated to predict the permeability without a series of measuring experiments. Porosity is measured by drying monitoring method, which measures weight variation continuously while drying surface-dried saturated sample, and drying rate is obtained from weight variation ratio with respect to the water saturation. The total of 6 Berea sandstone samples, which have a permeability range of 70 to 670 mD, were used in this work, and a new and empirical equation which could predict permeability of porous sandstone by using porosity and drying rate were obtained through regression analysis.

Acknowledgement

Supported by : 국토교통부

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