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公开(公告)号：US06650114B2
公开(公告)日：2003-11-18
申请号：US09894455
申请日：2001-06-28
IPC分类号： G01V300
摘要： NMR data are acquired with variable spacing between refocusing pulses, giving data with a variable interecho time TE. Under certain conditions, diffusion effects can be neglected and data acquired with a multiple TE spacing may be used to obtain a T2 distribution with increased resolution and reduced power requirements. In gas reservoirs, the maximum TE may be determined from diffusion considerations using a dual wait time pulse sequence and this maximum TE is used to acquire data with dual TE.
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公开(公告)号：US06646438B2
公开(公告)日：2003-11-11
申请号：US10191153
申请日：2002-07-09
IPC分类号： G01V300
摘要： NMR data are acquired with variable spacing between refocusing pulses, giving data with a variable interecho time TE. Under certain conditions, diffusion effects can be neglected and data acquired with a multiple TE spacing may be used to obtain a T2 distribution with increased resolution and reduced power requirements. In gas reservoirs, the maximum TE may be determined from diffusion considerations using a dual wait time pulse sequence and this maximum TE is used to acquire data with dual TE. By proper selection of TE, echos can be obtained with significantly reduced ringing.
摘要翻译： 以重新聚焦脉冲之间的可变间隔获取NMR数据，给出具有可变的间歇时间TE的数据。 在某些条件下，可以忽略扩散效应，并且可以使用多个TE间距获取的数据来获得具有增加的分辨率和降低的功率需求的T2分布。 在气藏中，可以使用双等待时间脉冲序列从扩散考虑确定最大TE，并且该最大TE用于采用双TE获取数据。 通过适当选择TE，可以获得显着减少振铃的回波。
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3.发明授权Method and apparatus for formation evaluation and borehole size determination 有权用于地层评估和钻孔尺寸确定的方法和装置公开(公告)号：US07425827B2
公开(公告)日：2008-09-16
申请号：US11541227
申请日：2006-09-29
申请人： Songhua Chen , Carl M. Edwards , Thomas Kruspe , Martin Blanz , Holger F. Thern , David R. Beard
发明人： Songhua Chen , Carl M. Edwards , Thomas Kruspe , Martin Blanz , Holger F. Thern , David R. Beard
IPC分类号： G01V3/00
摘要： The quality factor of a NMR-antenna depends upon mud conductivity, formation resistivity and the borehole size. The Q of the antenna is measured. From measurement of one of formation conductivity or borehole size, the other can be determined.
摘要翻译： NMR天线的质量因素取决于泥浆导电性，地层电阻率和钻孔尺寸。 测量天线的Q值。 从测量地层导电率或钻孔尺寸之一，可以确定另一个。
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公开(公告)号：US07180287B2
公开(公告)日：2007-02-20
申请号：US10839478
申请日：2004-05-05
申请人： Peter Rottengatter , Holger Thern , Radu Fechete , Martin Blanz , Thomas Kruspe
发明人： Peter Rottengatter , Holger Thern , Radu Fechete , Martin Blanz , Thomas Kruspe
IPC分类号： G01V3/00
CPC分类号： G01V3/32
摘要： NMR spin echo signals, acquired on a MWD logging tool, are susceptible to errors magnetic flux density has a gradient and the magnet on the logging tool is moving relative to the earth. The errors can be corrected by having the excitation pulse cover a smaller or a larger volume than the refocusing pulses. Correction may also be made by selective saturation, or by echo averaging.
摘要翻译： 在MWD测井工具上获取的NMR自旋回波信号容易受到误差的影响，磁通密度具有梯度，而测井工具上的磁体相对于地球运动。 可以通过使激发脉冲覆盖比重新聚焦脉冲更小或更大的体积来校正误差。 还可以通过选择性饱和或通过回波平均来进行校正。
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5.发明授权Antenna core material for use in MWD resistivity measurements and NMR measurements 有权用于MWD电阻率测量和NMR测量的天线芯材料公开(公告)号：US07235970B2
公开(公告)日：2007-06-26
申请号：US10518125
申请日：2003-06-17
摘要： The present invention provides a novel use of a material having a high internal magnetostrictive damping and/or using material with explicitly low magnetostriction as an antenna core material for NMR and resistivity devices in a borehole. The probe stuctural geometry facilitates the use of material, which has a relatively low magnectic permeability.
摘要翻译： 本发明提供了具有高内磁致伸缩阻尼和/或使用具有明显低磁致伸缩材料的材料作为钻孔中NMR和电阻率装置的天线芯材料的新颖用途。 探针结构几何便于材料的使用，材料具有相对低的磁导率。
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公开(公告)号：US20050248342A1
公开(公告)日：2005-11-10
申请号：US10839478
申请日：2004-05-05
申请人： Peter Rottengatter , Holger Thern , Radu Fechete , Martin Blanz , Thomas Kruspe
发明人： Peter Rottengatter , Holger Thern , Radu Fechete , Martin Blanz , Thomas Kruspe
CPC分类号： G01V3/32
摘要： NMR spin echo signals, acquired on a MWD logging tool, are susceptible to errors magnetic flux density has a gradient and the magnet on the logging tool is moving relative to the earth. The errors can be corrected by having the excitation pulse cover a smaller or a larger volume than the refocusing pulses. Correction may also be made by selective saturation, or by echo averaging.
摘要翻译： 在MWD测井工具上获取的NMR自旋回波信号容易受到误差的影响，磁通密度具有梯度，而测井工具上的磁体相对于地球运动。 可以通过使激发脉冲覆盖比重新聚焦脉冲更小或更大的体积来校正误差。 还可以通过选择性饱和或通过回波平均来进行校正。
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7.发明申请公开(公告)号：US20050127909A1
公开(公告)日：2005-06-16
申请号：US11034403
申请日：2005-01-12
CPC分类号： G01V3/32 , G01N24/081 , G01R33/34
摘要： The present invention provides a novel use of a material having a high internal magnetostrictive damping and/or using material with explicitly low magnetostriction as a NMR probe core material. The probe structural geometry facilitates the use of material, which has a relatively low magnetic permeability.
摘要翻译： 本发明提供具有高内磁致伸缩阻尼和/或使用具有明显低磁致伸缩的材料作为NMR探针芯材料的材料的新用途。 探头结构几何便于使用具有较低磁导率的材料。
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公开(公告)号：US06838876B2
公开(公告)日：2005-01-04
申请号：US10146534
申请日：2002-05-15
申请人： Thomas Kruspe , Martin Blanz , Peter Rottengatter
发明人： Thomas Kruspe , Martin Blanz , Peter Rottengatter
CPC分类号： G01R33/34053 , G01V3/32
摘要： A slotted NMR antenna cover for improved mechanical ruggedness during transmission and reception of NMR signals in a down hole environment during either MWD or wire line operations. A NMR slotted antenna cover is provided comprising an elongated tubular structure with longitudinal gaps or slots filled with a RF transmissive or non-conductive material. The slots can befilled at the slot ends with soft magnetic material to improve efficiency of the antenna. The slots are radial concave to reduce eddy currents induced by alternating magnetic flux entering and leaving the slots surrounding the antenna. In another embodiment, the antenna cover is RF transmissive on only a portion of the antenna, via slots or transmissive material, so that the antenna cover can be used to allow RF transmission from the antenna in a side looking or beam pattern restricted mode only.
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9.发明授权公开(公告)号：US07084625B2
公开(公告)日：2006-08-01
申请号：US11034403
申请日：2005-01-12
CPC分类号： G01V3/32 , G01N24/081 , G01R33/34
摘要： The present invention provides a novel use of a material having a high internal magnetostrictive damping and/or using material with explicitly low magnetostriction as a NMR probe core material. The probe structural geometry facilitates the use of material, which has a relatively low magnetic permeability.
摘要翻译： 本发明提供具有高内磁致伸缩阻尼和/或使用具有明显低磁致伸缩的材料作为NMR探针芯材料的材料的新用途。 探头结构几何便于使用具有较低磁导率的材料。
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公开(公告)号：US06686737B2
公开(公告)日：2004-02-03
申请号：US09976492
申请日：2001-10-12
申请人： Thomas Kruspe , Martin Blanz , Peter Rottengatter
发明人： Thomas Kruspe , Martin Blanz , Peter Rottengatter
IPC分类号： G01V300
CPC分类号： G01R33/4616 , G01V3/32
摘要： The excitation and/or refocusing pulses used in a CPMG sequence have a nonlinear phase and an envelope with no zero crossings and a corresponding frequency spectrum with sidelobes suppressed. As a result of this, peak power requirements are reduced. Pulse shaping is used for reducing the peak power requirements of a NMR logging tool.
摘要翻译： 在CPMG序列中使用的激励和/或重聚焦脉冲具有非线性相位和没有过零点的包络线，并且抑制了旁瓣的对应频谱。 作为结果，峰值功率要求降低。 脉冲整形用于降低NMR测井工具的峰值功率要求。
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