Inversion of Geophysical Prospecting Data

物探数据反演

• 批准号: 05452318
• 负责人: SASSA Koichi
• 金额: $ 3.65万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-05452318/
• 关键词: Inversion; Geophysical Prospecting; Seismic Reflection Method; AVO Inversion; Seismic Tomography; Resistivity Method; トモグラフィ

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.

本研究旨在建立地球物理数据的反演方法。反演方法是利用地球物理勘探方法测得的地球物理响应，从数学上重建地球物理性质的方法。重点研究了地震反射法、地震层析成像法和电阻率法。研究内容如下：·从反射波波形中提取反射系数和基本子波。通过积分法从反射系数估算声阻抗。·利用GLI方法建立AVO反演。约束地震走时层析成像及其在野外资料中的应用地震各向异性层析成像的发展及实时和衰减层析成像的综合分析二维电阻率反演程序的开发，包括FEM和DLSQ方法利用伪剖面法和灵敏度分析方法对电阻率资料进行了解释，建立了几种物探方法的反演方法。为便于实际应用，提高了它们的精度。此外，我们还可以将反演结果联合收割机组合起来，对反演结果进行综合解释。

项目成果

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)

Tsuyoshi Kanno：“地壳信息测量中电测结果解释方法的基础研究”日本信息地质学会会刊35-38（1994）。

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)

Watanabe, T.：“利用地震波初爆波形估计衰减特性及其在层析反演中的应用”BUTSURI-TANSA。

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)

Toshiki Watanabe：“使用已知信息通过约束速度重建提高弹性波断层扫描分析的准确性”材料（待出版）。

WATANABE,T.: "Seismic attenuation tomography by use of amplitude attenuation and pulse broadening" Expanded abstract of SEG 63rd annual meeting. 33-36 (1993)

WATANABE,T.：“利用振幅衰减和脉冲展宽进行地震衰减断层扫描”SEG 第 63 届年会的扩展摘要。

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)

Tsuyoshi Kanno：“三维电极阵列电阻率伪截面中的地下结构各向异性”物理勘探学会第 89 届学术会议论文集 253-258（1993）。