公开(公告)号：US20170254919A1

公开(公告)日：2017-09-07

申请号：US15061636

申请日：2016-03-04

申请人： Radu Coman ,  Holger Tietjen ,  Martin Blanz ,  Holger F. Thern

发明人： Radu Coman ,  Holger Tietjen ,  Martin Blanz ,  Holger F. Thern

IPC分类号： G01V3/32 ,  E21B49/08 ,  E21B47/12 ,  E21B49/00

CPC分类号： G01V3/32 ,  E21B47/12 ,  E21B49/00 ,  E21B49/08 ,  G01N24/081 ,  G01R33/36 ,  G01R33/383 ,  G01R33/44 ,  G01R33/448

摘要： A nuclear magnetic resonance (NMR) apparatus includes a transmitting assembly configured to emit one or more dual-wait-time pulse sequences, and a receiving assembly configured to detect a long-wait-time echo train and a short-wait-time echo train. The apparatus also includes a processor configured to perform at least one of: estimating a difference between the long-wait-time echo train and the short-wait-time echo train to generate a differential echo-train, inverting the differential echo-train into a differential T2 distribution, and detecting a motion artefact in response to determining that the differential echo-train includes a short-T2 porosity fraction that is greater than a threshold value; and inverting two echo trains into two T2 distributions, calculating at least two porosity fractions for each of the two T2 distributions, estimating a shift of a porosity amount between the at least two porosity fractions, and detecting the motion artefact based on the shift.

公开(公告)号：US10539705B2

公开(公告)日：2020-01-21

申请号：US14920436

申请日：2015-10-22

申请人： Radu Coman ,  Holger Tietjen ,  Holger F. Thern ,  Martin Blanz

发明人： Radu Coman ,  Holger Tietjen ,  Holger F. Thern ,  Martin Blanz

IPC分类号： G01V3/32 ,  G01V3/38 ,  G01V3/40

摘要： A system for measuring a property of fluid in an earth formation includes a downhole tool disposed in a borehole and configured to be movable within the borehole and a nuclear magnetic resonance (NMR) measurement device including a transmitter configured to emit at least two pulse trains of magnetic energy into the earth formation and a detector configured to detect a long-TW echo train and a short-TW echo train resulting from the at least two pulse trains. The system also includes a processor configured to combine the information from the at least two pulse trains and a rate of penetration of the downhole tool to form a measurement of the property.

公开(公告)号：US10126457B2

公开(公告)日：2018-11-13

申请号：US15061636

申请日：2016-03-04

申请人： Radu Coman ,  Holger Tietjen ,  Martin Blanz ,  Holger F. Thern

发明人： Radu Coman ,  Holger Tietjen ,  Martin Blanz ,  Holger F. Thern

IPC分类号： G01V3/32 ,  E21B49/08 ,  E21B47/12 ,  E21B49/00 ,  G01N24/08 ,  G01R33/36 ,  G01R33/383 ,  G01R33/44

摘要： A nuclear magnetic resonance (NMR) apparatus includes a transmitting assembly configured to emit one or more dual-wait-time pulse sequences, and a receiving assembly configured to detect a long-wait-time echo train and a short-wait-time echo train. The apparatus also includes a processor configured to perform at least one of: estimating a difference between the long-wait-time echo train and the short-wait-time echo train to generate a differential echo-train, inverting the differential echo-train into a differential T2 distribution, and detecting a motion artefact in response to determining that the differential echo-train includes a short-T2 porosity fraction that is greater than a threshold value; and inverting two echo trains into two T2 distributions, calculating at least two porosity fractions for each of the two T2 distributions, estimating a shift of a porosity amount between the at least two porosity fractions, and detecting the motion artefact based on the shift.

公开(公告)号：US20160116629A1

公开(公告)日：2016-04-28

申请号：US14920436

申请日：2015-10-22

申请人： Radu Coman ,  Holger Tietjen ,  Holger F. Thern ,  Martin Blanz

发明人： Radu Coman ,  Holger Tietjen ,  Holger F. Thern ,  Martin Blanz

IPC分类号： G01V3/32

CPC分类号： G01V3/32 ,  G01V3/38 ,  G01V3/40

摘要： A system for measuring a property of fluid in an earth formation includes a downhole tool disposed in a borehole and configured to be movable within the borehole and a nuclear magnetic resonance (NMR) measurement device including a transmitter configured to emit at least two pulse trains of magnetic energy into the earth formation and a detector configured to detect a long-TW echo train and a short-TW echo train resulting from the at least two pulse trains. The system also includes a processor configured to combine the information from the at least two pulse trains and a rate of penetration of the downhole tool to form a measurement of the property.

摘要翻译： 用于测量地层中的流体性质的系统包括设置在钻孔中并被配置为可在钻孔内移动的井下工具，以及包括发射器的核磁共振（NMR）测量装置，所述核磁共振（NMR）测量装置被配置为发射至少两个脉冲列 磁能进入地层，以及检测器，被配置为检测长TW回波串和由至少两个脉冲序列产生的短TW回波串。 该系统还包括处理器，该处理器被配置为组合来自至少两个脉冲序列的信息和井下工具的穿透速率以形成该属性的测量。

公开(公告)号：US10061053B2

公开(公告)日：2018-08-28

申请号：US14701008

申请日：2015-04-30

申请人： Martin Blanz ,  Holger Frank Thern ,  Holger Tietjen ,  Mouin Hamdan ,  Radu Coman

发明人： Martin Blanz ,  Holger Frank Thern ,  Holger Tietjen ,  Mouin Hamdan ,  Radu Coman

IPC分类号： G01V3/32 ,  E21B47/12 ,  G01N24/08 ,  G01R33/44

CPC分类号： G01V3/32 ,  E21B47/12 ,  E21B49/00 ,  G01N24/081 ,  G01R33/448

摘要： A method for estimating a property of a subsurface material includes conveying a carrier through a borehole penetrating the subsurface material and performing an NMR measurement in a volume of interest in the subsurface material using an NMR tool having an antenna disposed at the carrier. The method further includes receiving with the antenna a short build-up signal due to a short magnetization build-up time of the NMR measurement, an echo-train signal with short polarization time due to the NMR measurement, and an echo-train signal with long polarization time due to the NMR measurement. The method further includes inverting, simultaneously, the short build-up signal, the short-polarization-time echo-train signal, and the long-polarization-time echo-train signal using a processor to estimate the property; and transmitting a signal comprising the property to a signal receiving device.

公开(公告)号：US10551521B2

公开(公告)日：2020-02-04

申请号：US15151672

申请日：2016-05-11

申请人： Radu Coman ,  Martin Blanz ,  Holger Tietjen

发明人： Radu Coman ,  Martin Blanz ,  Holger Tietjen

IPC分类号： G01V3/32 ,  G01R33/561

摘要： A nuclear magnetic resonance (NMR) apparatus includes a carrier configured to be deployed in a borehole, a magnet assembly configured to generate a static magnetic field in an earth formation, and at least one transmitting assembly configured to generate an oscillating magnetic field in a volume of interest within the formation. The apparatus also includes a pulse generator configured to apply a direct-echo pulse sequence to the at least one transmitting assembly, the direct-echo pulse sequence having a plurality of successive pulses including a first pulse and a second pulse configured to generate a first direct NMR echo, and a third pulse, the third pulse selected to at least partially separate a stimulated NMR echo from a second direct NMR echo occurring after the third pulse. The apparatus further includes at least one receiving assembly configured to detect the first and second direct echoes of an NMR echo train.

公开(公告)号：US20160334533A1

公开(公告)日：2016-11-17

申请号：US15151672

申请日：2016-05-11

申请人： Radu Coman ,  Martin Blanz ,  Holger Tietjen

发明人： Radu Coman ,  Martin Blanz ,  Holger Tietjen

IPC分类号： G01V3/32 ,  G01R33/561

CPC分类号： G01V3/32 ,  G01N24/081 ,  G01R33/448 ,  G01R33/5615 ,  G01R33/5617 ,  G01R33/56554

摘要： A nuclear magnetic resonance (NMR) apparatus includes a carrier configured to be deployed in a borehole, a magnet assembly configured to generate a static magnetic field in an earth formation, and at least one transmitting assembly configured to generate an oscillating magnetic field in a volume of interest within the formation. The apparatus also includes a pulse generator configured to apply a direct-echo pulse sequence to the at least one transmitting assembly, the direct-echo pulse sequence having a plurality of successive pulses including a first pulse and a second pulse configured to generate a first direct NMR echo, and a third pulse, the third pulse selected to at least partially separate a stimulated NMR echo from a second direct NMR echo occurring after the third pulse. The apparatus further includes at least one receiving assembly configured to detect the first and second direct echoes of an NMR echo train.

摘要翻译： 核磁共振（NMR）装置包括构造成部署在钻孔中的载体，构造成在地层中产生静磁场的磁体组件，以及至少一个传输组件，其构造成在体积中产生振荡磁场 在地层内感兴趣。 该装置还包括脉冲发生器，该脉冲发生器被配置为向至少一个发射组件施加直接回波脉冲序列，所述直接回波脉冲序列具有包括第一脉冲和第二脉冲的多个连续脉冲，所述第一脉冲和第二脉冲被配置为产生第一直接 NMR回波和第三脉冲，所述第三脉冲被选择为至少部分地将经刺激的NMR回波与在所述第三脉冲之后出现的第二直接NMR回波分离。 该装置还包括被配置为检测NMR回波串的第一和第二直接回波的至少一个接收组件。

公开(公告)号：US20160320519A1

公开(公告)日：2016-11-03

申请号：US14701008

申请日：2015-04-30

申请人： Martin Blanz ,  Holger Frank Thern ,  Holger Tietjen ,  Mouin Hamdan ,  Radu Coman

发明人： Martin Blanz ,  Holger Frank Thern ,  Holger Tietjen ,  Mouin Hamdan ,  Radu Coman

IPC分类号： G01V3/32 ,  E21B47/12 ,  G01R33/561

CPC分类号： G01V3/32 ,  E21B47/12 ,  E21B49/00 ,  G01N24/081 ,  G01R33/448

摘要： A method for estimating a property of a subsurface material includes conveying a carrier through a borehole penetrating the subsurface material and performing an NMR measurement in a volume of interest in the subsurface material using an NMR tool having an antenna disposed at the carrier. The method further includes receiving with the antenna a short build-up signal due to a short magnetization build-up time of the NMR measurement, an echo-train signal with short polarization time due to the NMR measurement, and an echo-train signal with long polarization time due to the NMR measurement. The method further includes inverting, simultaneously, the short build-up signal, the short-polarization-time echo-train signal, and the long-polarization-time echo-train signal using a processor to estimate the property; and transmitting a signal comprising the property to a signal receiving device.

摘要翻译： 用于估计地下材料的性质的方法包括：使用具有布置在载体上的天线的NMR工具，将穿过穿透地下材料的钻孔的载体输送到地下材料中的感兴趣体积中的NMR测量。 该方法还包括由于NMR测量的较短的磁化积聚时间，利用天线接收短的积聚信号，由于NMR测量，具有短的极化时间的回波信号信号以及具有 由于NMR测量，极化时间长。 该方法还包括使用处理器同时反转短积累信号，短极化时间回波串信号和长极化时间回波串信号，以估计该性能; 以及将包括所述特性的信号发送到信号接收装置。

公开(公告)号：US20170315257A1

公开(公告)日：2017-11-02

申请号：US15139914

申请日：2016-04-27

申请人： Radu Coman ,  Holger Tietjen

发明人： Radu Coman ,  Holger Tietjen

IPC分类号： G01V3/32 ,  G01V3/38

CPC分类号： G01V3/32

摘要： An apparatus for estimating properties of an earth formation includes a nuclear magnetic resonance (NMR) measurement device including a magnet assembly, at least one transmitting assembly configured to generate an oscillating magnetic field in the formation, and a receiver configured to detect NMR signals from at least a sensitive volume in the formation. The apparatus also includes a processing device configured to receive NMR data corresponding to the detected NMR signals. The processing device is configured to perform combining a geometrical factor of the NMR logging tool with a temperature distribution, the temperature distribution indicating a temperature value at at least one location in the sensitive volume of the formation, correcting the NMR data based on the temperature value, estimating a property of the formation based on the corrected NMR data, and performing one or more aspects of an energy industry operation based on the estimated property.

公开(公告)号：US10302801B2

公开(公告)日：2019-05-28

申请号：US15139914

申请日：2016-04-27

申请人： Radu Coman ,  Holger Tietjen

发明人： Radu Coman ,  Holger Tietjen

IPC分类号： G01V3/32

摘要： An apparatus for estimating properties of an earth formation includes a nuclear magnetic resonance (NMR) measurement device including a magnet assembly, at least one transmitting assembly configured to generate an oscillating magnetic field in the formation, and a receiver configured to detect NMR signals from at least a sensitive volume in the formation. The apparatus also includes a processing device configured to receive NMR data corresponding to the detected NMR signals. The processing device is configured to perform combining a geometrical factor of the NMR logging tool with a temperature distribution, the temperature distribution indicating a temperature value at at least one location in the sensitive volume of the formation, correcting the NMR data based on the temperature value, estimating a property of the formation based on the corrected NMR data, and performing one or more aspects of an energy industry operation based on the estimated property.