NUCLEAR MAGNETIC RESONANCE LOGGING INSTRUMENT PROBE WITH DOUBLE-LAYERED MAGNETS AND ANTENNA EXCITATION METHOD

摘要

The present invention provides a nuclear magnetic resonance logging instrument probe with double-layered magnets and an antenna excitation method, the nuclear magnetic resonance logging instrument probe includes: a probe framework and a shielding layer arranged in the probe framework; a plurality of main magnets are provided above and below the shielding layer, respectively; central axes of the main magnets are parallel with each other, and distances between the central axes of each of the main magnets and a central axis of the probe framework are the same; a distance between central axes of any two main magnets is not smaller than a first preset value; and an antenna is provided at outer side of each main magnety. In the present invention, circumferential recognizing capability of the nuclear magnetic resonance logging instrument probe can be improved and three-dimensional (radial, axial and circumferential) stratum detection can be achieved.

主权项

1. A nuclear magnetic resonance logging instrument probe, comprising: a probe framework and a shielding layer arranged in the probe framework; wherein
a plurality of main magnets are provided above and below the shielding layer, respectively; central axes of the main magnets are parallel with each other, and distances between the central axis of each of the main magnets and a central axis of the probe framework are the same; a distance between central axes of any two main magnets is not smaller than a first preset value; an antenna is provided at outer side of each main magnet, and a plurality of the antennas are fed independently.