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1. 发明授权

US07026814B2 Tuning of nuclear magnetic resonance logging tools 有权
标题翻译：调整核磁共振测井仪
公开(公告)号：US07026814B2
公开(公告)日：2006-04-11
申请号：US10742481
申请日：2003-12-19
申请人： Ernesto Bordon , Martin D. Hurlimann , Chanh Cao Minh
发明人： Ernesto Bordon , Martin D. Hurlimann , Chanh Cao Minh
IPC分类号： G01V3/00
CPC分类号： G01N24/081 , G01R33/3628
摘要： A method for tuning a nuclear magnetic resonance (NMR) tool having an operating frequency and equipped with an antenna, is disclosed comprising: (a) transmitting a rf magnetic field to a sample under investigation; (b) receiving an NMR signal from the sample within a detection window; (c) determining mistuning of said antenna relative to said operating frequency; (d) analyzing the received echo signal to determine mistuning of the received signal from the operating frequency. The mistuning of the received signals from the operating frequency may be determined by analyzing any changes in phase of the echo along the echo signal. The antenna tuning process may be automated by measuring calibrated signal amplitudes at more than one frequency and identifying a maximum amplitude. The system tuning may be maintained by repeating (a) through-(d) while operating the tool and implementing a feedback loop.
摘要翻译：公开了一种用于调谐具有工作频率并配备有天线的核磁共振（NMR）工具的方法，包括：（a）将RF磁场传送到被调查的样品; （b）在检测窗口内从样品接收NMR信号; （c）确定所述天线相对于所述工作频率的失谐; （d）分析所接收的回波信号以确定来自工作频率的接收信号的失谐。可以通过分析沿回波信号的回波相位的任何变化来确定来自工作频率的接收信号的失谐。天线调谐过程可以通过在多于一个频率上测量校准信号幅度并识别最大振幅来自动化。在操作工具并实施反馈回路时，可以通过重复（a）至（d）来维持系统调整。

2. 发明申请

US20050156592A1 Tuning of nuclear magnetic resonance logging tools 有权
标题翻译：调整核磁共振测井仪
公开(公告)号：US20050156592A1
公开(公告)日：2005-07-21
申请号：US10742481
申请日：2003-12-19
申请人： Ernesto Bordon , Martin Hurlimann , Chanh Minh
发明人： Ernesto Bordon , Martin Hurlimann , Chanh Minh
IPC分类号： G01R33/36 , G01R33/44 , G01V3/00
CPC分类号： G01N24/081 , G01R33/3628
摘要： A method for tuning a nuclear magnetic resonance (NMR) tool having an operating frequency and equipped with an antenna, is disclosed comprising: (a) transmitting a rf magnetic field to a sample under investigation; (b) receiving an NMR signal from the sample within a detection window; (c) determining mistuning of said antenna relative to said operating frequency; (d) analyzing the received echo signal to determine mistuning of the received signal from the operating frequency. The mistuning of the received signals from the operating frequency may be determined by analyzing any changes in phase of the echo along the echo signal. The antenna tuning process may be automated by measuring calibrated signal amplitudes at more than one frequency and identifying a maximum amplitude. The system tuning may be maintained by repeating (a) through-(d) while operating the tool and implementing a feedback loop.
摘要翻译：公开了一种用于调谐具有工作频率并配备有天线的核磁共振（NMR）工具的方法，包括：（a）将RF磁场传送到被调查的样品; （b）在检测窗口内从样品接收NMR信号; （c）确定所述天线相对于所述工作频率的失谐; （d）分析所接收的回波信号以确定来自工作频率的接收信号的失谐。可以通过分析沿回波信号的回波相位的任何变化来确定来自工作频率的接收信号的失谐。天线调谐过程可以通过在多于一个频率上测量校准信号幅度并识别最大振幅来自动化。在操作工具并实施反馈回路时，可以通过重复（a）至（d）来维持系统调整。

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