2000 Fiscal Year Final Research Report Summary
Development of a method to estimate velocity structure using drill bits as a seismic source
| Project/Area Number |
11650957
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
資源開発工学
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| Research Institution | Tohoku University |
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Principal Investigator |
ASANUMA Hiroshi Tohoku University, Graduate School of Engineering, Associate Professor, 大学院・工学研究科, 助教授 (50250717)
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| Co-Investigator(Kenkyū-buntansha) |
MORIYA Hirokazu Tohoku University, Graduate School of Engineering, Research Associate, 大学院・工学研究科, 助手 (60261591)
NIITSUMA Hiroaki Tohoku University, Graduate School of Engineering, Professor, 大学院・工学研究科, 教授 (90108473)
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| Project Period (FY) |
1999 – 2000
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| Keywords | Driil signal / Downhole 3C measurement / 3D hodogram / PCA / Velocity Model / HDR |
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| Research Abstract |
1. Investigation on signal processing : We investigated a method to extract information on velocity structure from continuous drill signals. It has been revealed that velocity information can be extracted by analysis three dimensional hodograms in both time and frequency domains.
2. Investigation on inversion : We investigated a method to model velocity structure using information obtained by the techniques in 1. We have found that velocity structure consistent with real structure can be modeled by using a layerd model.
3. Evaluation of the method : Performance of the methods studied in 1 and 2 are eveluated by using real data sets collected at Soultz. Problem in processing and limitation of this method are examined and fed back to the developing phase 1 and 2.
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