- 专利标题: NMR well logging instrument and method with synthetic apertures
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申请号: US15363905申请日: 2016-11-29
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公开(公告)号: US10444397B2公开(公告)日: 2019-10-15
- 发明人: Martin Hurlimann , Irfan Bulu , Yi-Qiao Song
- 申请人: Schlumberger Technology Corporation
- 申请人地址: US TX Sugar Land
- 专利权人: SCHLUMBERGER TECHNOLOGY CORPORATION
- 当前专利权人: SCHLUMBERGER TECHNOLOGY CORPORATION
- 当前专利权人地址: US TX Sugar Land
- 代理商 Trevor G. Grove
- 主分类号: G01V3/32
- IPC分类号: G01V3/32 ; G01R33/50 ; G01N24/08 ; G01R33/3415
摘要:
An apparatus for measuring nuclear magnetic resonance (NMR) properties of subsurface formations includes a magnet for pre-polarizing nuclear spins in the formations. A plurality of transmitter antennas is spaced apart along a length of the apparatus. The apparatus includes at least one of a receiver circuit selectively coupled to at least one of the plurality of transmitter antennas and a separate receiver antenna. The apparatus includes circuitry for applying radio frequency current pulses selectively to each of the plurality of transmitter antennas such that during a NMR measurement sequence while the apparatus is moving substantially only those of the plurality of transmitter antennas having radio frequency current pulses applied thereto are disposed longitudinally along a same region of interest in the subsurface formations.