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2003 Fiscal Year Final Research Report Summary

Development of a New Electromagnetic Tool for Evaluating the Ground Environment

Research Project

Project/Area Number 13650988
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 資源開発工学
Research InstitutionWaseda University

Principal Investigator

NOGUCHI Koji  NOGUCHI,Koji, 理工学部, 教授 (50147948)

Project Period (FY) 2001 – 2003
Keywordsground-water environment / electromagnetic method / Induction logging / High-temperature SQUID / GMR sensor / MI sensor
Research Abstract

Applications of the electromagnetic methods to investigations of the soil pollution and the near surface buried objects are expected. These situations demand signifficant improvements in exploration technology. For the electromagnetic method, the improvements of sensor are especially important elements.
High-temperature SQUID sensor is ideal for geophysical exploration both in its sensitivity and its measuring frequency band, and the basic character of high-temperature SQUID sensor was examined. As a result it was developed that the frequency characteristics are flat from DC to 100kHz and the system noise level is within 0.85 pT, and the SQUID sensor gives reliable measurements in Frequency Domain Electromagnetic Method, although leaves scope for improvement.
Then, the magnetometers using a GMR sensor and a MI sensor are contrived, and their characteristics and performance for application to the electromagnetic method were examined. As a result, their linearity and sensitivity are good enough for practical electromagnetic sounding use. These new magnetometers can be practically applied as receivers in the electromagnetic method with minor modifying to the magnetometers and some improvements to its signal processing technology.
These small sensors should enable the logging tools to downsize, and the borehole electromagnetic techniques could be improved suitable for the near surface exploration.
These estimate the prospecting ability of the borehole electromagnetic method, 3-D electromagnetic responses were calculated using integral equation method, especially, Tx-Rx configurations of single borehole and borehole-to-borehole were examined.
These outcomes could contribute to develop new possibilities in the electromagnetic methods.

  • Research Products

    (6 results)

All Other

All Publications (6 results)

  • [Publications] 野口康二, 打浪克彦, 上田良太, 斎藤章: "磁気抵抗素子を用いた磁力計の電磁探査法への適用"物理探査学会第106回学術講演会講演論文集. 197-200 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 大里和己, 大澤健二, 荒井英一, 片山弘行, 野口康二: "電磁法への適用のための高温超電導磁力計の周波数特性試験"物理探査学会第106回学術講演会講演論文集. 193-196 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 野口康二, 上田匠, 汪振洋: "TDEM法における電磁応答の特性について"物理探査学会第104回学術講演会講演論文集. 259-263 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Noguchi, K. et al.: "Application of the magneto-resistive sensor for electromagnetic method"Proceedings of the 106th SEGJ Conference. 197-200 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Noguchi, K. et al.: "The Frequency Response Test of High Temperature SQUID Sensor"Proceedings of the 106th SEGJ Conference. 193-196 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Noguchi, K. et al.: "Study on the Characteristics of Time-Domain Electromagnetic Responses"Proceedings of the 104th SEGJ Conference. 259-263 (2001)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2005-04-19  

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