核磁共振合成孔径测井仪及方法

• 来源期刊: 国外测井技术
• 学科: 工学
• 关键词: 核磁共振 合成孔径测井仪 方法
• 年，卷（期）: gwcjjs_2019,（3）
• 页码范围: 43-43
• 页数: 1页
• 分类号: TE

摘要

An apparatus for measuring nuclear magnetic resonance (NMR) properties of subsurface formations includes a magnet for pre-polarizing nuclear spins in the formations. A plurality of transmitter antennas is spaced apart along a length of the apparatus. The apparatus includes at least one of a receiver circuit selectively coupled to at least one of the plurality of transmitter antennas and a separate receiver antenna. The apparatus includes circuitry for applying radio frequency current pulses selectively to each of the plurality of transmitter antennas such that during a NMR measurement sequence while the apparatus is moving substantially only those of the plurality of transmitter antennas having radio frequency current pulses applied thereto are disposed longitudinally along a same region of interest in the subsurface formations.