-
11.
公开(公告)号:US10151852B2
公开(公告)日:2018-12-11
申请号:US15258843
申请日:2016-09-07
发明人: Lizhi Xiao , Guangzhi Liao , Xin Li , Feng Deng , Sihui Luo , Zhe Sun , Wei Liu , Weiliang Chen , Jie Wang
IPC分类号: G01V3/32 , G01V3/14 , E21B47/024 , G01R33/34 , G01N24/08 , G01R33/3415 , G01R33/38 , G01R33/383
摘要: The present invention provides a multi-azimuth nuclear magnetic resonance logging instrument and an antenna excitation method, the nuclear magnetic resonance logging instrument 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 magnet, and a plurality of the antennas are fed independently. In the present invention, circumferential recognizing capability of the nuclear magnetic resonance logging instrument can be improved and three-dimensional (radial, axial and circumferential) stratum detection can be achieved.