发明授权
- 专利标题： Induced gamma ray spectorscopy well logging system
- 专利标题（中）： 诱导γ射线探测测井系统
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申请号： US218682申请日： 1994-03-28
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公开(公告)号： US5406078A公开(公告)日： 1995-04-11
- 发明人: Larry A. Jacobson
- 申请人： Larry A. Jacobson
- 申请人地址： TX Houston
- 专利权人： Halliburton Logging Services, Inc.
- 当前专利权人： Halliburton Logging Services, Inc.
- 当前专利权人地址： TX Houston
- 主分类号： G01V5/10
- IPC分类号： G01V5/10
摘要：
A system for measuring fast neutron induced gamma ray energy spectra in cased wellbores. The system includes an electronic source of monoenergetic 14 MeV fast neutrons, a high density bismuth germanate scintillation detector, a downhole pulse height analyzer and a highly accurate gain stabilizer circuit. The gain stabilization utilizes the iron (Fe) edge in the catpure gamma ray spectrum to establish system gain since iron is always present in the tool case and the wellbore casing.
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