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1994 Fiscal Year Final Research Report Summary

Inversion of Geophysical Prospecting Data

Research Project

Project/Area Number 05452318
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field 資源開発工学
Research InstitutionKYOTO UNIVERSITY

Principal Investigator

SASSA Koichi  Kyoto Univ., Fac.of Eng., Professor, 工学部, 教授 (40025953)

Co-Investigator(Kenkyū-buntansha) WATANABE Toshiki  Kyoto Univ., Fac.of Eng., Instructor, 工学部, 助手 (50210935)
SUGANO Tsuyoshi  Kyoto Univ., Fac.of Eng., Lecturer, 工学部, 講師 (60026151)
ASHIDA Yuzuru  Kyoto Univ., Fac.of Eng., Assoc.Professor, 工学部, 助教授 (60184165)
Project Period (FY) 1993 – 1994
KeywordsInversion / Geophysical Prospecting / Seismic Reflection Method / AVO Inversion / Seismic Tomography / Resistivity Method
Research Abstract

This research project aims to establish the inversion methods of geophysical data. Inversion method can reconstruct the physical properties of the earth mathematically by using its responses measured by geophysical prospecting methods.
In this research, we investigated the inversion methods of geophysical data. We focused our research on seismic reflection method, seismic tomography and electrical resistivity method. The topics of the research are as follows ;
・ Extraction of reflection coefficients and basic wavelet from reflected waveform.
・ Estimation of acoustic impedance from reflection coefficients by integration method.
・ Establishing AVO inversion by use of GLI method.
・ Constrained seismic traveltime tomography and its application to field data.
・ Development of seismic anisotropy tomography and integrated analysis of reaveltime and attenuation tomography.
・ Development of 2-dimensional resistivity inversion code including FEM and DLSQ method.
・ Interpretation of resistivity data with the support of pseudo-section and sensitivity analysis.
As the result of this research, inversion methods of several geophysical prospecting methods were established. Their accuracys were improved for practical use. Furthermore, we can combine the result of the inversion to make an integrated interpretation of the results.

  • Research Products

    (11 results)

All Other

All Publications (11 results)

  • [Publications] 芦田 譲: "地震探査データからの音響インピーダンスの復元における積分法の適用と限界" 石油技術協会誌. 57. 142-150 (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 渡辺 俊樹: "既知の情報を用いた制約つき速度再構成による弾性波トモグラフィ解析の精度の向上" 材料. (掲載予定). (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] WATANABE,T.: "Seismic attenuation tomography by use of amplitude attenuation and pulse broadening" Expanded abstract of SEG 63rd annual meeting. 33-36 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 菅野 強: "立体電極配列比抵抗擬似断面における地下構造異方性" 物理探査学会第89回学術講演会論文集. 253-258 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 菅野 強: "地殻内情報計測における電気探査結果解釈法に関する基礎的研究" 日本情報地質学会講演予稿集. 35-38 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Ashida, Y.: "Aplication and limitation of integral method for recovery of acoustic impedance from seismic data" J.of the Japanese Association for Petroleum Technology. 57. 142-150 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Watanabe, T.: "Improvement in the accuracy of seismic traveltime tomography by adding a priori information as constraints on velocity reconstruction" J.of the Society of Materials Science, Japan. 44 (in print). (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Watanabe, T.: "Estimation of attenuation characteristics by use of first break waveform of seismic wave and its application to tomographic inversion" BUTSURI-TANSA. 46. 25-35 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Watanabe, T.: "Seismic attenuation tomography by use of amplitude attenuation and pulse broadening" Expanded abstract of SEG 63rd annual meeting. 33-36 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Sugano, T.: "New interpretation methods in electrical prospecting for geophysical measurements" Proc.of Geoinforum-'94. 35-38 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Sugano, T.: "Resistivity anisotropy analysis by solid electrode array pseudosection methods" Proc.of 89th SEGJ conference. 253-258 (1993)

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

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Published: 1996-04-15  

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