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公开(公告)号：US10386530B2
公开(公告)日：2019-08-20
申请号：US14431843
申请日：2013-09-27
IPC分类号： G01R33/30 , G01V3/32 , E21B49/08 , G01N24/08 , G01R33/345 , G01R33/44 , G01R33/46 , G01N24/10 , G01R33/383
摘要： A coaxial nuclear magnetic resonance (NMR) probe and related methods are described herein. The coaxial NMR probe includes a housing with a fluid inlet, a fluid outlet, a longitudinal axis, and an interior volume. The housing contains a fluid sample that is analyzed by the probe. The coaxial NMR probe also includes an elongated conductor disposed along the longitudinal axis of the housing. The elongated conductor generates an oscillating electromagnetic field within the interior volume of the housing. The oscillating electromagnetic field produces a NMR signal within the fluid sample. The elongated conductor may also be used to receive this NMR signal. The NMR signal is then analyzed to determine information about the fluid sample. Various NMR pulse sequences for use with this coaxial probe and other coaxial probes are also described herein.
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公开(公告)号：US10371853B2
公开(公告)日：2019-08-06
申请号：US15659186
申请日：2017-07-25
发明人： Yi-Qiao Song , Michael Wilt , Pabitra Sen
IPC分类号： G01V3/32 , G01N24/08 , G01R33/36 , G01R33/3415 , G01R33/44
摘要： A nuclear magnetic resonance (NMR) system that uses a feedback induction coil to detect NMR signals generated within a substance is described herein. In one embodiment, the NMR system uses the Earth's magnetic field in conjunction with a transmitter coil that applies NMR sequences to a formation. The NMR sequences generate a weak NMR signal within the formation due to the weakness of the Earth's magnetic field. This weak NMR signal is detected using the feedback induction coil.
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公开(公告)号：US10197652B2
公开(公告)日：2019-02-05
申请号：US13774425
申请日：2013-02-22
摘要： A method and system for determining a nuclear magnetic resonance (NMR) property are described herein. The method includes applying a static magnetic field to a substance and applying an NMR pulse sequence to the substance. The NMR pulse sequence comprises a first pulse sequence segment applied at a first frequency to a shell and a second pulse sequence segment applied at a second frequency. The first pulse sequence segment generates a resonant signal in the shell and the second pulse sequence segment generates a characteristic within the resonant signal. The resonant signal is detected and an NMR property is determined using the characteristic within the detected resonant signal.
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公开(公告)号：US10132894B2
公开(公告)日：2018-11-20
申请号：US13736985
申请日：2013-01-09
发明人： Yi-Qiao Song , Fei Han , Jeffrey Paulsen
IPC分类号： G01R33/54 , G01N24/08 , G01R33/48 , G01R33/50 , G01R33/561
摘要： A method of investigating an object using nuclear magnetic resonance (NMR) equipment includes generating a one-dimensional projection of the object for each of a plurality of echoes utilizing echo train signal indications resulting from pulse sequences, and utilizing the plurality of one-dimensional projections, for each of the plurality of echoes, generating NMR image data for at least one location in the object. The NMR image data may be displayed. The displayed data may include a T2 decay curve, a T2 value display, a T2 distribution graph, or petrophysical data for at least one object location.
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公开(公告)号：US10031255B2
公开(公告)日：2018-07-24
申请号：US14223615
申请日：2014-03-24
发明人： Yi-Qiao Song , Bernhard Bluemich
摘要： Methods are disclosed for characterizing samples containing a plurality of molecular species through the use of multi-dimensional spectra obtained by processing of measurements resulting from pulse sequences combining NMR spectroscopy and NMR relaxation techniques.
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56.发明授权公开(公告)号：US09823205B2
公开(公告)日：2017-11-21
申请号：US14543290
申请日：2014-11-17
发明人： Zhixiang Luo , Jeffrey Paulsen , Yi-Qiao Song
CPC分类号： G01N24/081 , G01R33/448 , G01V3/32
摘要： Methods and systems for determining surface relaxivity from nuclear magnetic resonance measurements relate to applying multiple nuclear magnetic resonance (NMR) diffusion editing Carr-Purcell-Meiboom-Gill (CPMG) pulse sequences to the porous medium, wherein the diffusion editing CPMG pulse sequences have a diffusion encoding time Δ; receiving NMR data generated by the pulse sequences; processing the received NMR data to obtain a distribution f(T2,D) for the diffusion encoding time Δ; repeating the applying, the receiving, and the processing at least one time for pulse sequences having different respective diffusion encoding times Δ to obtain respective distributions f(T2,D) corresponding respectively to the different diffusion encoding times Δ; and utilizing the respectively obtained distributions f(T2,D) to generate a surface relaxivity (ρ) determination.
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公开(公告)号：US09771789B2
公开(公告)日：2017-09-26
申请号：US14470318
申请日：2014-08-27
发明人： Irfan Bulu , Yi-Qiao Song , Jagdish Shah
IPC分类号： E21B47/022 , G01R33/38
CPC分类号： E21B47/02216 , G01R33/3808 , G01V3/32
摘要： A downhole tool includes a cylindrical housing. A magnet and an antenna may be positioned within the housing. An excluder may be positioned around the housing, and a thickness of the excluder may vary around the housing.
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公开(公告)号：US09759830B2
公开(公告)日：2017-09-12
申请号：US14067475
申请日：2013-10-30
发明人： A. Ballard Andrews , Soraya S. Betancourt , Andrew E. Pomerantz , Soumyajit Mandal , Yi-Qiao Song
CPC分类号： G01V3/08 , G01N24/081 , G01V3/32
摘要： A formation fluid sample is analyzed using NMR spectroscopy to obtain a NMR spectrum. The NMR spectrum is then analyzed to find evidence of the amount of olefins present in the sample. The amount of olefins present in the sample can then be correlated to the level of contamination of the sample. In one embodiment, a 1H chemical shift of between substantially 4.5 and 6 ppm is used to identify olefins present in the sample. In another embodiment, a 1H chemical shift of substantially 1.9 to 2.1 ppm is used to identify olefins present in the sample. The NMR spectral equipment can be located uphole or downhole.
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公开(公告)号：US20170248732A1
公开(公告)日：2017-08-31
申请号：US15506759
申请日：2015-08-27
发明人： Yi-Qiao Song , Soumyajit Mandal , Yiqiao Tang , David McCowan
CPC分类号： G01V3/32 , G01N24/081 , G01R19/32 , G01R33/3607 , G01R33/3621 , G01R33/3628 , G01R33/3852 , G01R33/543
摘要： An NMR system includes a radio frequency (RF) NMR application-specific integrated circuit (ASIC) chip configured to generate an RF output signal and a rectifier configured to receive the RF output signal and convert the RF output signal to (a) a direct current (DC) pulsed field gradient (PFG) signal or (b) a DC trigger signal for at least one of (i) activating at least one component of an NMR system external to the NMR RF ASIC chip and (ii) synchronizing at least one component of an NMR system external to the NMR RF ASIC chip.
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公开(公告)号：US20170176626A1
公开(公告)日：2017-06-22
申请号：US14974252
申请日：2015-12-18
摘要： Systems and methods are described herein for investigating a downhole formation using a nuclear magnetic resonance (NMR) tool. The tool includes multiple detectors spaced along an axis parallel to a length of the wellbore. While the tool is moving through the wellbore, NMR pulse sequences are applied to the formation and resulting NMR signals are detected by the detectors. The data obtained over a period of time by the multiple detectors are inverted together to obtain an indication of a parameter of the formation at multiple locations along the length of the wellbore.
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