发明名称 |
DOWNHOLE NUCLEAR MAGNETIC RESONANCE (NMR) TOOL WITH TRANSVERSAL-DIPOLE ANTENNA CONFIGURATION |
摘要 |
In some aspects, a downhole nuclear magnetic resonance (NMR) tool includes a magnet assembly and an antenna assembly. The NMR tool can operate in a wellbore in a subterranean region to obtain NMR data from the subterranean region. The magnet assembly produces a magnetic field in a volume about the wellbore. The magnet assembly includes a central magnet, a first end piece magnet spaced apart from a first axial end of the central magnet, and a second end piece magnet spaced apart from a second axial end of the central magnet. The antenna assembly includes a transversal-dipole antenna. In some cases, orthogonal transversal-dipole antennas produce circular-polarized excitation in the volume about the wellbore, and acquire a response from the volume by quadrature coil detection. |
申请公布号 |
CA2918628(A1) |
申请公布日期 |
2015.03.05 |
申请号 |
CA20142918628 |
申请日期 |
2014.08.08 |
申请人 |
HALLIBURTON ENERGY SERVICES, INC. |
发明人 |
REIDERMAN, ARCADY;CHEN, SONGHUA |
分类号 |
E21B47/00;G01V3/18;G01V3/38 |
主分类号 |
E21B47/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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