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1.发明公开公开(公告)号：US20240361485A1
公开(公告)日：2024-10-31
申请号：US18644857
申请日：2024-04-24
摘要： The present invention falls within the area of well logging to evaluate formations in oil and gas producing fields. Particularly, the present invention describes a method for generating synthetic T1-T2 maps from marginal distributions of nuclear magnetic resonance logging tools, wherein the method comprises: decomposing marginal distributions of T1 and T2 relaxation times into an initial sum of log-normal functions with the same amplitudes and different means and standard deviations; setting the initial amplitudes, means and standard deviations so that the sum of log-normal functions corresponds to the marginal distributions of T1 and T2; and using the amplitudes, means and standard deviations set in a sum of two-dimensional log-normal functions to generate a synthetic T1-T2 map.
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公开(公告)号：US20240248232A1
公开(公告)日：2024-07-25
申请号：US18565609
申请日：2022-06-02
发明人： Shin Utsuzawa , Wei Chen , Marie Van Steene , Yuelin Shen , Albina Mutina , Lukasz Zielinski
CPC分类号： G01V3/38 , E21B44/00 , G01V3/32 , E21B2200/20 , E21B2200/22
摘要： A method is provided for evaluating logging while drilling (LWD) nuclear magnetic resonance (NMR) measurement quality. The method may include rotating a bottom hole assembly (BHA) in a wellbore to drill. The BHA may include an NMR tool deployed at a first location and at least one motion sensor deployed at a second location, wherein the first and second locations are axially spaced apart in the BHA. The method may also include making NMR measurements and corresponding motion sensor measurements while drilling in the wellbore. The method may further include processing the motion sensor measurements to determine the NMR measurement quality of the corresponding NMR measurements.
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公开(公告)号：US20240053503A1
公开(公告)日：2024-02-15
申请号：US18232461
申请日：2023-08-10
发明人： Tianmin Jiang , Ronald J.M. Bonnie
CPC分类号： G01V3/32 , G01N24/081 , G01R33/50 , G01V3/38
摘要： Implementations described and claimed herein provide systems and methods for developing resources from a reservoir. In one implementation, obtaining nuclear magnetic resonance (NMR) log data is obtained for one or more wells of the reservoir. The NMR data is captured using one or more logging tools. An interpreted NMR log is generated by quantifying one or more fluid producibility parameters. The one or more fluid producibility parameters are quantified by processing the NMR log data using automated unsupervised machine learning. A production characterization of the reservoir is generated based on the interpreted NMR log, with the reservoir being developed based on the production characterization.
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公开(公告)号：US11828900B2
公开(公告)日：2023-11-28
申请号：US17279617
申请日：2019-09-27
发明人： Yiqiao Tang , Yi-Qiao Song , Martin Hurlimann , Yanxian Lin
摘要： A method can include performing an operation using a system where the operation depends on a decision made via a digital decision model stored in memory of the system; responsive to a decision state of the digital decision model, transmitting a request to update the digital decision model; and responsive to the request, receiving an updated digital decision model, where the updated digital decision model includes at least one new decision state that improves performance of the operation of the system.
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公开(公告)号：US11774623B2
公开(公告)日：2023-10-03
申请号：US17806558
申请日：2022-06-13
CPC分类号： G01V3/32 , B01L3/502715 , E21B49/081 , G01N21/85 , G01N24/082 , G01N33/2823 , G01R33/302 , G01V3/14 , B01L2300/0654 , B01L2300/0816 , B01L2300/0864 , E21B49/0875 , G01N24/081
摘要： A method and microfluidic device to perform reservoir simulations using pressure-volume-temperature (“PVT”) analysis of wellbore fluids.
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公开(公告)号：US11762121B2
公开(公告)日：2023-09-19
申请号：US17183361
申请日：2021-02-24
发明人： Wei Shao , Songhua Chen
CPC分类号： G01V3/38 , G01N24/081 , G01R33/448 , G01V3/32
摘要： A method includes generating a temperature-corrected nuclear magnetic resonance (NMR) measurement-derived value corresponding to a target temperature using a correlation model that is based on a difference between the target temperature and a sample temperature. The method also includes determining a formation property based on the temperature-corrected NMR measurement-derived value corresponding to the target temperature.
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公开(公告)号：US11754518B2
公开(公告)日：2023-09-12
申请号：US17429711
申请日：2020-02-11
发明人： Andrea Valori , Salah Mohammed Al-Ofi , Wael Abdallah , Marie Van Steene , Chengbing Liu , Shouxiang Ma
CPC分类号： G01N24/081 , G01V3/20 , G01V3/32 , G01V3/38
摘要： Methods and systems are provided that employ a combination of dielectric dispersion measurement(s) and Nuclear Magnetic Resonance (NMR) measurement(s) to determine data that characterizes tortuosity of rock and data that characterizes tortuosity of fluid phases in the rock independently from one another.
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公开(公告)号：US20230145921A1
公开(公告)日：2023-05-11
申请号：US17520270
申请日：2021-11-05
CPC分类号： G01V3/32 , E21B17/0283 , E21B47/12
摘要： A nuclear magnetic resonance (NMR) downhole tool and method that may include a housing, a power source, a Radio Frequency (RF) pulse generator tank electrically connected to the power source, a power switch electrically disposed within the RF pulse generator tank and disposed in the housing, and an NMR signal acquisition tank electrically connected to the RF pulse generator tank and disposed in the housing. The method may include disposing the NMR downhole tool into a wellbore, charging a first capacitor with the power source that is electrically connected to the first capacitor, generating a RF pulse, disconnecting the first capacitor from the RF pulse generator tank, and storing energy from the inductive coil in the first capacitor. The method may further include connecting the inductive coil to an NMR signal acquisition tank using a decoupler switch and acquiring an NMR signal with the NMR signal acquisition tank.
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公开(公告)号：US20230133700A1
公开(公告)日：2023-05-04
申请号：US17514654
申请日：2021-10-29
发明人： Songhua Chen , Wei Shao
摘要： System and methods for nuclear magnetic resonance (NMR) fluid substitution are provided. NMR logging measurements of a reservoir rock formation are acquired. Fluid zones within the reservoir rock formation are identified based on the acquired measurements. The fluid zones include water zones comprising water-saturated rock and at least one oil zone comprising rock saturated with multiphase fluids. Water zones having petrophysical characteristics matching those of the oil zone(s) within the formation are selected. NMR responses to multiphase fluids resulting from a displacement of water by hydrocarbon in the selected water zones are simulated. A synthetic dataset including NMR T2 distributions of multiphase fluids is generated based on the simulation. The synthetic dataset is used to train a machine learning (ML) model to substitute NMR T2 distributions of multiphase fluids with those of water. The trained ML model is applied to the NMR logging measurements acquired for the oil zone(s).
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公开(公告)号：US11624854B1
公开(公告)日：2023-04-11
申请号：US17560018
申请日：2021-12-22
发明人： Jie Yang
摘要： Methods to operate an NMR tool, methods to simulate a numerically-controlled oscillator of an NMR tool in real time, and downhole NMR tools are presented. A method to operate an NMR tool includes determining a phase shift of a sinusoidal wave, determining a number of look-up tables and a number of terms of Taylor Expansions performed to obtain a value corresponding to a phase angle of the phase shift, and separating the phase angle into a first component and a second component. The method also includes obtaining a first value corresponding to the first component from the number of look-up tables, performing the number of terms of Taylor Expansions on the second component to obtain a second value corresponding to the second component, combining the first value and the second value to obtain the value of the phase angle, and generating the sinusoidal wave having the phase shift.
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