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1. 发明申请

US20130093422A1 Nuclear Magnetic Resonance Logging Tool Having an Array of Antennas 有权
标题翻译：具有天线阵列的核磁共振测井工具
公开(公告)号：US20130093422A1
公开(公告)日：2013-04-18
申请号：US13519647
申请日：2010-06-16
申请人： Marian L. Morys , Knizhnik Sergei , Rebecca C. Jachmann , Robert Epstein
发明人： Marian L. Morys , Knizhnik Sergei , Rebecca C. Jachmann , Robert Epstein
IPC分类号： G01V3/32
CPC分类号： G01V3/32 , H01Q1/04 , H01Q7/00 , H01Q21/24
摘要： Various disclosed nuclear magnetic resonance (NMR) logging systems and methods employ an array of antennas to provide increased resolution without sacrificing signal-to-noise ratio. Certain method embodiments include: establishing a static magnetic field (B0) with a tool moving along a borehole through a formation; concurrently driving a multiple antenna cells to produce a radio frequency field (B1) in said formation; measuring an individual response from each antenna cell as nuclear spins undergo precession in the formation; and determining at least one characteristic relaxation time of the formation based at least in part on the individual response. The individual responses can be associated with positions where the individual responses were measured, and the relaxation time can be determined from a combination of those responses associated with a given position. Certain responses may be excluded due to tool motion that degrades the measured response.
摘要翻译：各种公开的核磁共振（NMR）测井系统和方法采用天线阵列来提供增加的分辨率而不牺牲信噪比。某些方法实施例包括：建立具有工具沿井眼移动通过地层的工具的静态磁场（B0）; 同时驱动多个天线单元以在所述地层中产生射频场（B1）; 测量来自每个天线单元的个体响应，因为核自旋在地层中进行进动; 以及至少部分地基于所述个体响应来确定所述地层的至少一个特征弛豫时间。个体反应可以与测量个体反应的位置相关联，并且可以从与给定位置相关联的那些反应的组合来确定弛豫时间。可能由于工具运动而排除某些响应，这会降低测量的响应。

2. 发明授权

US09201159B2 Nuclear magnetic resonance logging tool having an array of antennas 有权
标题翻译：具有天线阵列的核磁共振测井工具
公开(公告)号：US09201159B2
公开(公告)日：2015-12-01
申请号：US13519647
申请日：2010-06-16
申请人： Marian L. Morys , Knizhnik Sergei , Rebecca C. Jachmann , Robert Epstein
发明人： Marian L. Morys , Knizhnik Sergei , Rebecca C. Jachmann , Robert Epstein
IPC分类号： G01V3/00 , G01V3/32 , H01Q1/04 , H01Q7/00 , H01Q21/24
CPC分类号： G01V3/32 , H01Q1/04 , H01Q7/00 , H01Q21/24
摘要： Various disclosed nuclear magnetic resonance (NMR) logging systems and methods employ an array of antennas to provide increased resolution without sacrificing signal-to-noise ratio. Certain method embodiments include: establishing a static magnetic field (B0) with a tool moving along a borehole through a formation; concurrently driving a multiple antenna cells to produce a radio frequency field (B1) in said formation; measuring an individual response from each antenna cell as nuclear spins undergo precession in the formation; and determining at least one characteristic relaxation time of the formation based at least in part on the individual response. The individual responses can be associated with positions where the individual responses were measured, and the relaxation time can be determined from a combination of those responses associated with a given position. Certain responses may be excluded due to tool motion that degrades the measured response.
摘要翻译：各种公开的核磁共振（NMR）测井系统和方法采用天线阵列来提供增加的分辨率而不牺牲信噪比。某些方法实施例包括：建立具有工具沿井眼移动通过地层的工具的静态磁场（B0）; 同时驱动多个天线单元以在所述地层中产生射频场（B1）; 测量来自每个天线单元的个体响应，因为核自旋在地层中进行进动; 以及至少部分地基于所述个体响应来确定所述地层的至少一个特征弛豫时间。个体反应可以与测量个体反应的位置相关联，并且可以从与给定位置相关联的那些反应的组合来确定弛豫时间。可能由于工具运动而排除某些响应，这会降低测量的响应。

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