J.C. Patents
Multi-detecting depth nuclear magnetic resonance logging tool and probe, and antenna excitation method
The present invention provides a multi-detecting depth nuclear magnetic resonance logging tool and probe, and an antenna excitation method, the probe of nuclear magnetic resonance logging tool includes: a housing, a magnet and an antenna array apparatus; the magnet is fixedly arranged in the housing; the antenna array apparatus includes at least two groups of antenna arrays distributed along circumference of the magnet, and each group of antenna arrays include N layers of independently fed antennas; k-th layer antenna is arranged between the magnet and (k+1)-th layer antenna, k=1, 2, . . . N−1; the antenna is fixed on a support, and the support is fixedly connected to the housing. In the present invention, stratum information detection at different azimuth angles is achieved by exciting different antenna arrays, so that circumferential recognizing capability of nuclear magnetic resonance logging tool probe is improved and three-dimensional (radial, axial and circumferential) stratum detection is achieved.
CHINA UNIVERSITY OF PETROLEUM-BEIJING
G G
G01N G01R
inventional inventional
Xin Guangzhi Weiliang Jie Lizhi Qunjie Wei Sihui Zhe
Li Liao Chen Wang Xiao Du Liu Luo Sun