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公开(公告)号：US11506810B2
公开(公告)日：2022-11-22
申请号：US17419014
申请日：2019-12-23
发明人： Yi-Qiao Song , Yiqiao Tang , Shin Utsuzawa , Tancredi Botto , Irfan Bulu , Martin Hurlimann
摘要： An NMR well logging tool is provided that includes a sensor and associated electronic circuitry. The sensor includes an array of RF antenna elements. The electronic circuitry includes at least one low-power integrated circuit and a plurality of high-power modules corresponding the RF antenna elements of the array. Each high-power module is coupled to a corresponding RF antenna element of the array and includes an RF amplifier that is configured to amplify RF pulses generated by the at least one low-power integrated circuit and supplied thereto for transmission by the corresponding antenna element. In embodiments, the RF amplifier of each high-power module can include an H-bridge circuit or other suitable RF amplifier.
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公开(公告)号：US20220365241A1
公开(公告)日：2022-11-17
申请号：US17754627
申请日：2020-10-08
发明人： Yi-Qiao Song , Yiqiao Tang , Mehdi Hizem , Lukasz Zielinski , Michel Claverie , ZhanGuo Shi
摘要： Methods and systems are provided for optimizing well-logging using an optimized wait time determined by analysis nuclear magnetic resonance data to achieve faster and better quality borehole evaluation. The method comprises performing a nuclear magnetic resonance pre-log testing; identifying a wait time for a portion of a signal from the pre-log testing with a long T1 and T2, value at each depth of the pre-log testing, wherein T1 is defined as a longitudinal relaxation time and T2 is a transverse relaxation time ascertained from the nuclear magnetic resonance prelog testing; and constructing a logging program with a logging program wait time being consistent with the wait time identified.
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公开(公告)号：US20220291156A1
公开(公告)日：2022-09-15
申请号：US17664474
申请日：2022-05-23
发明人： Jeffrey Paulsen , Yi-Qiao Song
IPC分类号： G01N24/08 , G01R33/44 , G01R33/563 , G01V3/32
摘要： A method and system for determining a property of a substance using nuclear magnetic resonance (NMR) is described herein. The method includes applying a NMR pulse sequence to the substance. The NMR pulse sequence includes a first set of pulses and a second set of pulses. The first set of pulses and the second set of pulses encode for overlapping diffusion times. By overlapping diffusion times, the NMR pulse sequence can be used to measure a diffusion coefficient for a first diffusion time, a diffusion coefficient for a second diffusion time, and a correlation between the two overlapping diffusion times. This information, in turn, can be used to differentiate between intrinsic bulk diffusivity of the substance and the reduced diffusivity of the substance caused by restricted diffusion.
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公开(公告)号：US11340180B2
公开(公告)日：2022-05-24
申请号：US16298728
申请日：2019-03-11
发明人： Jeffrey Paulsen , Yi-Qiao Song
IPC分类号： G01V3/32 , G01N24/08 , G01R33/44 , G01R33/563
摘要： A method and system for determining a property of a substance using nuclear magnetic resonance (NMR) is described herein. The method includes applying a NMR pulse sequence to the substance. The NMR pulse sequence includes a first set of pulses and a second set of pulses. The first set of pulses and the second set of pulses encode for overlapping diffusion times. By overlapping diffusion times, the NMR pulse sequence can be used to measure a diffusion coefficient for a first diffusion time, a diffusion coefficient for a second diffusion time, and a correlation between the two overlapping diffusion times. This information, in turn, can be used to differentiate between intrinsic bulk diffusivity of the substance and the reduced diffusivity of the substance caused by restricted diffusion.
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公开(公告)号：US20220120931A1
公开(公告)日：2022-04-21
申请号：US17419014
申请日：2019-12-23
发明人： Yi-Qiao Song , Yiqiao Tang , Shin Utsuzawa , Tancredi Botto , Irfan Bulu , Martin Hurlimann
摘要： An NMR well logging tool is provided that includes a sensor and associated electronic circuitry. The sensor includes an array of RF antenna elements. The electronic circuitry includes at least one low-power integrated circuit and a plurality of high-power modules corresponding the RF antenna elements of the array. Each high-power module is coupled to a corresponding RF antenna element of the array and includes an RF amplifier that is configured to amplify RF pulses generated by the at least one low-power integrated circuit and supplied thereto for transmission by the corresponding antenna element. In embodiments, the RF amplifier of each high-power module can include an H-bridge circuit or other suitable RF amplifier.
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公开(公告)号：US20220082517A1
公开(公告)日：2022-03-17
申请号：US17421406
申请日：2019-01-08
摘要： A method (and corresponding system) that characterizes a porous rock sample is provided, which involves subjecting the porous rock sample to an applied experimental pressure where a first fluid that saturates the porous rock sample is displaced by a second fluid, and subsequently applying an NMR pulse sequence to the rock sample, detecting resulting NMR signals, and generating and storing NMR data representative of the detected NMR signals. The application of experimental pressure and NMR measurements can be repeated over varying applied experimental pressure to obtain NMR data associated with varying applied experimental pressure values. The NMR data can be processed using inversion to obtain a probability distribution function of capillary pressure values as a function of NMR property values. The probability distribution function of capillary pressure values as a function of NMR property values can be processed to determine at least one parameter indicative of the porous rock sample.
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公开(公告)号：US10444397B2
公开(公告)日：2019-10-15
申请号：US15363905
申请日：2016-11-29
发明人： Martin Hurlimann , Irfan Bulu , Yi-Qiao Song
IPC分类号： G01V3/32 , G01R33/50 , G01N24/08 , G01R33/3415
摘要： An apparatus for measuring nuclear magnetic resonance (NMR) properties of subsurface formations includes a magnet for pre-polarizing nuclear spins in the formations. A plurality of transmitter antennas is spaced apart along a length of the apparatus. The apparatus includes at least one of a receiver circuit selectively coupled to at least one of the plurality of transmitter antennas and a separate receiver antenna. The apparatus includes circuitry for applying radio frequency current pulses selectively to each of the plurality of transmitter antennas such that during a NMR measurement sequence while the apparatus is moving substantially only those of the plurality of transmitter antennas having radio frequency current pulses applied thereto are disposed longitudinally along a same region of interest in the subsurface formations.
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公开(公告)号：US10345478B2
公开(公告)日：2019-07-09
申请号：US14727967
申请日：2015-06-02
发明人： Ravinath Kausik Kadayam Viswanathan , Martin D. Hurlimann , Colm Ryan , Frank P. Shray , Yi-Qiao Song
IPC分类号： G01V3/32 , G01N24/08 , G01R33/44 , G01R33/563
摘要： Systems and methods for generating a multi-dimensional distribution function. First data and second data may be received in response to one or more radiofrequency pulses that are transmitted into a subterranean formation. The first data may include Carr-Purcell-Meiboom-Gill data, and the second data may include diffusion editing data with initial echo spacings longer than subsequent echo spacings. The second data may be inverted. A multi-dimensional distribution function may be determined using the inverted second data.
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公开(公告)号：US10061048B2
公开(公告)日：2018-08-28
申请号：US14334461
申请日：2014-07-17
发明人： Yi-Qiao Song , Albina Rishatovna Mutina , Ravinath Kausik Kadayam Viswanathan , Martin Hurlimann
摘要： Methods for analyzing a formation samples using nuclear magnetic resonance (NMR) are described herein. One method includes performing an NMR measurement of the formation sample to obtain NMR data. The NMR measurement detects NMR signals with echo times of less than or equal to 100 microseconds. The NMR data is analyzed to determine a measure of organic hydrogen content of the formation sample, such as (i) total organic hydrogen content, (ii) kerogen content, (iii) bitumen content, and/or (iv) oil content.
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公开(公告)号：US09863246B2
公开(公告)日：2018-01-09
申请号：US14149537
申请日：2014-01-07
发明人： Soumyajit Mandal , Yi-Qiao Song
CPC分类号： E21B49/087 , E21B49/10 , G01N33/28 , G01V3/32
摘要： A hydrocarbon sample is subjected to a chemically selective J-editing nuclear magnetic resonance (NMR) pulse sequence. Resulting signals are analyzed in order to identify a coupling frequency present in at least one molecule of the hydrocarbon sample. A J-coupling frequency of approximately 150 Hz is indicative of a component having an internal double bonded carbon atom (i.e., an olefin). The presence of an olefin in a hydrocarbon sample can be indicative of the presence of a synthetic based mud (SBM) in the sample.
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