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NMR ANTENNA ARRANGEMENT FOR FAST MOVING NMR LOGGING TOOL
NMR ANTENNA ARRANGEMENT FOR FAST MOVING NMR LOGGING TOOL
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机译:用于快速移动NMR伐木工具的NMR天线布置
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摘要
Disclosed are NMR logging methods and antenna arrangements for fast moving NMR logging tools. The NMR logging tool includes a permanent magnet for inducing a static magnetic field in a formation within a borehole and a transmitter antenna for transmitting a RF pulse sequence into the formation. Two receiver antennae are configured to receive NMR response signals from the formation, the two receiver antennae including a first receiver antenna arranged axially below a second receiver antenna. The first receiver antenna and the second receiver antenna are disposed within a surface area of the transmitter antenna, and the transmitter axial length is substantially the same as an axial length of the two receiver antennae.
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