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公开(公告)号：US11635541B2
公开(公告)日：2023-04-25
申请号：US16361592
申请日：2019-03-22
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：US11531135B2
公开(公告)日：2022-12-20
申请号：US17025577
申请日：2020-09-18
发明人： Arcady Reiderman , Songhua Chen
摘要： A nuclear magnetic resonance (NMR) sensor and methods and systems for use are provided. The method comprises disposing a nuclear magnetic resonance (NMR) sensor into a borehole, the NMR sensor comprising a magnet assembly to create a static magnetic field and a first transversal-dipole antenna having an azimuthally selective response function. The method further comprises, while rotating the NMR sensor, initiating azimuthally selective NMR excitation in at least one sensitivity region at a first frequency using the first transversal-dipole antenna and the magnet assembly, wherein the at least one sensitivity region is determined by the static magnetic field and the RF magnetic field. The method then comprises acquiring one or more azimuthally selective NMR signals at the first frequency using the first transversal-dipole antenna.
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公开(公告)号：US20220187489A1
公开(公告)日：2022-06-16
申请号：US17517234
申请日：2021-11-02
发明人： Jie Yang , Songhua Chen
摘要： Noise in drilling operation measurements can be eliminated or reduced using machine learning. For example, a system described herein can receive one or more measured signals in a logging-while-drilling process for drilling a wellbore. The system can determine a coupling factor for noise in the one or more measured signals. The system can generate a corrected signal by removing the noise multiplied by the coupling factor from the one or more measured signals. The system can output the corrected signal for use in drilling operations in the wellbore.
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公开(公告)号：US11353619B2
公开(公告)日：2022-06-07
申请号：US16335988
申请日：2018-04-11
发明人： Songhua Chen , Lilong Li
摘要： The present disclosure is directed to a method of determining wettability characteristics of a sub-surface formation within a wellbore utilizing nuclear magnetic resonance (NMR) and bulk fluid measurements at various stages of fluid saturation at that wellbore location. In another aspect, the pumping pressure is incrementally changed within the wellbore, measuring injection fluid and hydrocarbon saturation data values between the incremental pump pressure changes. In another aspect, a measuring and sampling tool is disclosed to execute the method and produce wettability characteristics. In another aspect, a system is disclosed that can operate NMR devices, bulk fluid equipment, pump systems, and other devices to collect data and to determine wettability characteristics on the collected data.
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公开(公告)号：US11143014B2
公开(公告)日：2021-10-12
申请号：US15116412
申请日：2014-05-19
IPC分类号： E21B47/005 , E21B47/135 , E21B33/14 , G01N24/08 , G01R33/38 , G01N33/38
摘要： Various embodiments include nuclear magnetic resonance (MR) sensor array systems and methods are disclosed. One such system includes a downhole casing having at least one MR sensor array peripherally coupled to an outside of the casing. At least one MR sensor array can include an MR sensor configured to monitor a cement/fluid mix composition while the cement is setting.
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公开(公告)号：US10969513B2
公开(公告)日：2021-04-06
申请号：US16377469
申请日：2019-04-08
发明人： Wei Shao , Songhua Chen
摘要： A method includes generating a temperature-corrected nuclear magnetic resonance (NMR) measurement-derived value corresponding to a target temperature using at least one of a dimension-reduction operation or a parameter-correlation operation 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：US10473600B2
公开(公告)日：2019-11-12
申请号：US15305540
申请日：2015-12-22
摘要： Various embodiments include a method for generating a pulse for use in nuclear magnetic resonance (NMR) logging. One such method generates the pulse by adjusting one or more of pulse parameters including a pulse shape, a pulse amplitude, a pulse phase, and/or a pulse frequency. The generated pulse produces a substantially uniform nuclear spin saturation or nuclear spin inversion response from a fluid. A wait time between the pulse transmission and an echo that indicates spin equilibrium has been achieved is substantially equal to a T1 time indicating characteristics of the fluid.
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公开(公告)号：US10379249B2
公开(公告)日：2019-08-13
申请号：US15300470
申请日：2015-12-01
IPC分类号： G01V3/00 , G01V3/32 , G01V3/14 , E21B49/08 , G01N11/00 , G01R33/44 , E21B47/18 , G01N24/08 , G01N33/28
摘要： Various embodiments include a method for determining a viscosity for heavy oil in a formation by obtaining viscosity data and nuclear magnetic resonance (NMR) relaxation time distribution data for a plurality of oil samples. A correlation is determined between a set of viscosity data for the plurality of oil samples and an NMR relaxation time geometric mean for the plurality of oil samples. An NMR relaxation time geometric mean intrinsic value is determined based on the correlation, apparent hydrogen index, and TE. Electromagnetic energy may then be transmitted into a formation and NMR relaxation time distributions determined for oil in the formation based on secondary electromagnetic field responses associated with the electromagnetic energy. A viscosity of the oil in the formation may then be determined based a correlation between the set of viscosity data and the NMR relaxation time geometric mean intrinsic value of the distribution data.
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公开(公告)号：US10338268B2
公开(公告)日：2019-07-02
申请号：US15546173
申请日：2016-04-14
发明人： Songhua Chen , Wei Shao
摘要： A method for determining earth formation properties including a data acquisition tool and a data acquisition processor coupled with NMR sensors and a first memory; transmitting earth formation fluid data to a data processing unit comprising a processor and a second memory. Obtaining a fully polarized state echo train (EFR) and a partially polarized state echo train burst (EPR); inverting the EPR to obtain an apparent transverse relaxation time (T2app) distribution; truncating the T2app distribution by discarding the partially polarized state echo train data; completing a forward model of the EPR to obtain an additional echo train burst (EFR_B), performing a second inversion of the data set; and determining earth formation fluid properties.
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公开(公告)号：US10324222B2
公开(公告)日：2019-06-18
申请号：US15023522
申请日：2015-02-26
发明人： Songhua Chen , Wei Shao
IPC分类号： G01R33/44 , G01V3/32 , E21B47/04 , E21B49/00 , G01N24/08 , E21B47/09 , E21B49/02 , G01V3/38 , G01N15/08
摘要： Systems, methods, and software for predicting a pore throat size distribution are described. A representative method includes obtaining a nuclear magnetic resonance (NMR) relaxation-time distribution data set. The method also includes training a radial basis function (RBF) model based on the NMR relaxation-time distribution data set and a measured pore throat size distribution data set. The method also includes obtaining a subsequent NMR relaxation-time distribution data set. The method also includes employing the trained RBF model to predict a pore throat size distribution data set based at least in part on the subsequent NMR relaxation-time distribution data set. The method also includes storing or displaying a predicted pore throat size distribution corresponding to the predicted pore throat size distribution data set. The predicted pore throat size distribution is associated with a rock sample or subsurface formation volume.
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