Re-interpretation of the fluid electric conductivity measurements carried out in the MIZ-1 borehole at the Mizunami Underground Research Laboratory project

瑞浪超深地層研究所におけるMIZ-1号孔での電気伝導度検層の再解析

Bruines, P.*; 安藤 賢一*; 新堀 雄一*; 松岡 清幸*; 竹内 真司

Bruines, P.*; Ando, Kenichi*; Niibori, Yuichi*; Matsuoka, Kiyoyuki*; Takeuchi, Shinji

瑞浪超深地層研究所のMIZ-1号孔で実施した電気伝導度検層のデータを新たに開発した有限差分コードを用いて解析を行った。本解析結果で得られた透水量係数と水理試験結果を比較したところ、おおむね同等の値が得られたことから、本解析コードの有効性が確認された。

Fluid electric conductivity (FEC) measurements have been carried out in the 1,350 m long MIZ-1 borehole followed by the modeling of FEC curve with newly developed finite difference code and obtaining tranmissivity in each feed point from FEC logging. The obtained results are comparable to those obtained by hydraulic testing. The method can be valuable to help in the selection of locations for more detailed hydraulic tests. Under certain circumstances the method can be used as a low cost alternative to hydraulic testing.