- 专利标题: Method of through-casing gas detection
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申请号: US10394671申请日: 2003-03-21
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公开(公告)号: US06909969B2公开(公告)日: 2005-06-21
- 发明人: Stefan Eric Edward Calvert , Charles Alexander Pereira , James Roger Samworth
- 申请人: Stefan Eric Edward Calvert , Charles Alexander Pereira , James Roger Samworth
- 申请人地址: GB Leicestershire
- 专利权人: Reeves Wireline Technologies Limited
- 当前专利权人: Reeves Wireline Technologies Limited
- 当前专利权人地址: GB Leicestershire
- 代理机构: Paul & Paul
- 优先权: GB0208410 20020412
- 主分类号: G01V5/10
- IPC分类号: G01V5/10 ; G01V5/04
摘要:
A gas detection method includes carrying out respective neutron and density logs, using neutron and density detectors, along a length of well. The density log is corrected for the dimensions and properties of the well casing. The corrected density log is then combined with the neutron log to compensate for regions of artificially high density outside the casing. The compensated density log is continuously calibrated against the neutron log. The dynamically calibrated density and neutron logs are inspected for crossovers that signify the presence of gas in a formation.
公开/授权文献
- US20030216866A1 Method of through-casing gas detection 公开/授权日:2003-11-20