Using Well Logging Device Patents (Class 324/303)
  • Patent number: 10830230
    Abstract: A method for operating a linear compressor includes establishing a set of predictors, and establishing a model for an estimated head clearance of the linear compressor with the set of predictors. Coefficients of the model for the estimated head clearance of the linear compressor may also be established. The model for the estimated head clearance of the linear compressor may be used to calculate an estimated head clearance during operation of the linear compressor.
    Type: Grant
    Filed: January 4, 2017
    Date of Patent: November 10, 2020
    Assignees: Haier US Appliance Solutions, Inc., University of Louisville Research Foundation, Inc.
    Inventors: Gregory William Hahn, Srujan Kusumba, Michael Lee McIntyre, Joseph W Latham
  • Patent number: 10830027
    Abstract: A system and method for evaluating kerogen-rich shale (KRS) including measuring, via scanning microscopy, electrical conductivity of a KRS sample and a mechanical property of the KRS sample.
    Type: Grant
    Filed: April 15, 2019
    Date of Patent: November 10, 2020
    Assignee: Saudi Arabian Oil Company
    Inventors: Katherine Leigh Hull, Younane N. Abousleiman, Shannon L. Eichmann, David Jacobi
  • Patent number: 10823809
    Abstract: A phase difference caused by eddy currents is determined for an MR system. First MR data is acquired with a first sequence by irradiating at least one RF pulse having an RF excitation pulse, importing a first test gradient during or after the RF excitation pulse, applying a read-out gradient, and acquiring the first MR data while the read-out gradient is switched, so the first MR data is acquired for at least one K-space line. Second MR data is acquired with a second sequence by importing a second test gradient during or after the RF excitation pulse, and applying the read-out gradient. The second MR data is acquired while the read-out gradient is switched, so the second MR data is acquired for the at least one K-space line. The phase difference per voxel is determined using the first MR data and the second MR data.
    Type: Grant
    Filed: January 8, 2019
    Date of Patent: November 3, 2020
    Assignee: Siemens Healthcare GmbH
    Inventors: Michael Köhler, Gudrun Ruyters
  • Patent number: 10816690
    Abstract: Provided is a radio frequency antenna receiving method and device for a downhole three-dimensional scanning nuclear magnetic resonance imager. The device comprises: an array antenna for receiving an echo signal, an antenna interface circuit, a receiving and amplifying circuit for amplifying the echo signal, an analog-to-digital conversion circuit, a signal collecting circuit and a control circuit, which are sequentially connected; the array antenna comprises N antenna units, where N?4; four ports of the control circuit are respectively connected to the antenna interface circuit, the receiving and amplifying circuit, the analog-to-digital conversion circuit and the signal collecting circuit so as to control them, and the control circuit is connected to a logging ground acquisition system; the antenna interface circuit selects one antenna unit in the array antenna. The method and device of the present invention can perform signal detection in a circumferentially multi-directional sensitive region.
    Type: Grant
    Filed: January 2, 2019
    Date of Patent: October 27, 2020
    Assignee: CHINA UNIVERSITY OF PETROLEUM-BEIJING
    Inventors: Lizhi Xiao, Guangzhi Liao, Wei Liu
  • Patent number: 10802097
    Abstract: A method of magnetic resonance imaging an object utilizing a plurality of flip angles is provided. The method includes transmitting a first preparation pulse corresponding to a first flip angle of the plurality into the object, and receiving a first MR signal from the object based at least in part on the first preparation pulse. The method further includes transmitting a second preparation pulse corresponding to a second flip angle of the plurality into the object, receiving a second MR signal from the object based at least in part on the second preparation pulse, and generating a T1 mapping of the object based at least in part on the first MR signal and the second MR signal. The second flip angle is different than the first flip angle.
    Type: Grant
    Filed: April 6, 2017
    Date of Patent: October 13, 2020
    Assignee: GE Precision Healthcare LLC
    Inventors: Glenn Scott Slavin, Anne Menini
  • Patent number: 10782257
    Abstract: An apparatus, method and computer program for characterising samples using NMR. The apparatus includes a pulse sequence generator; and a response detector. The apparatus is configured to generate transverse and refocusing pulses and to record the decay response of a sample following a transverse pulse and echo response at least once after at least one refocusing pulse in order to enable determination of at least one relaxation time of the sample. In this way, sample or sample components with short relaxation times may be characterized.
    Type: Grant
    Filed: January 26, 2017
    Date of Patent: September 22, 2020
    Assignee: PERM Instruments Inc.
    Inventors: Apostolos Kantzas, Serguei I. Krioutchkov, Zheng Yin Wang
  • Patent number: 10768335
    Abstract: The present disclosure relates to generating multiple depths of investigation (DOI) measurements with a saddle point design nuclear magnetic resonance sensor. In general, an NMR sensor in accordance with the present disclosure includes a first magnet at a first radial distance from a radial center, and a second magnet at a second radial distance from the radial center. The first magnet at least partially cancels out a magnetic field gradient produced by the second magnet. Further, the NMR sensor may include an antenna that generates a first set of NMR data from a first DOI by operating at a first frequency and, generates a second set of NMR data from a second DOI by operating a second frequency. Additional frequencies are possible and envisioned.
    Type: Grant
    Filed: February 28, 2019
    Date of Patent: September 8, 2020
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Anatoly Dementyev, Henry Bachman
  • Patent number: 10732238
    Abstract: A circuit, system and method for measuring the optimal frequency of transmission and reception for achieving the best possible signal-to-noise ratio (SNR) in low impedance receive systems are provided. In one embodiment, the circuit includes: (1) an antenna that transmits and receives radio-frequency (RF) signals, (2) a receive circuit that is connected to the antenna during a receive mode and a calibration mode, wherein the receive circuit includes an amplifier having a low input impedance, and (3) an impedance switching circuit that places the amplifier in a high input impedance state during the calibration mode.
    Type: Grant
    Filed: December 2, 2016
    Date of Patent: August 4, 2020
    Assignee: Halliburton Energy Services, Inc.
    Inventor: Lakshmi Sri Jyothi Chimakurthy
  • Patent number: 10732314
    Abstract: Apparatus and method of characterizing a subterranean formation including observing a formation using nuclear magnetic resonance measurements, calculating an answer product by computing an integral transform on the indications in measurement-domain, and using answer products to estimate a property of the formation. Apparatus and a method for characterizing a subterranean formation including collecting NMR data of a formation, calculating an answer product comprising the data, wherein the calculating comprises a formula K ? ( x ) ? ? 0 ? ? k ? ( t ) ? e - t / x ? dt . and estimating a property of the formation using the answer product.
    Type: Grant
    Filed: December 21, 2011
    Date of Patent: August 4, 2020
    Assignee: Schlumberger Technology Corporation
    Inventors: Lalitha Venkataramanan, Tarek M. Habashy, Fred K. Gruber, Denise E. Freed
  • Patent number: 10724367
    Abstract: A method for estimation of water properties and hydrocarbon properties in a subsurface formation includes acquiring a plurality of well log measurements from the subsurface formation. The water properties and the hydrocarbon properties are parameterized with respect to a selected set of well log measurements. A simultaneous or sequential inversion is performed to estimate the water properties and the hydrocarbon properties.
    Type: Grant
    Filed: October 2, 2014
    Date of Patent: July 28, 2020
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventor: Chanh Cao Minh
  • Patent number: 10726586
    Abstract: The invention relates to a method for reconstructing magnetic resonance images, to a magnetic resonance apparatus and to a computer program product. According to the method, measurement data is acquired in an acquisition period. The measurement data is used to determine a motion curve over the acquisition period. In addition, at least one magnetic resonance image is reconstructed. In this process, the acquisition period is separated into a plurality of sub-periods by one or more separating periods and/or separating times in which the motion curve satisfies a defined motion condition, and each magnetic resonance image is reconstructed using the measurement data from at least one sub-period.
    Type: Grant
    Filed: July 6, 2018
    Date of Patent: July 28, 2020
    Assignee: Siemens Healthcare GmbH
    Inventors: Simon Bauer, Ralf Kartäusch
  • Patent number: 10718701
    Abstract: A method for determining a wettability of a subterranean formation (or formation core) includes either deploying a nuclear magnetic resonance (NMR) logging tool in a subterranean wellbore or deploying a formation core sample in a laboratory based NMR tool. NMR measurements of the formation (or formation core) are obtained and used to compute the wettability. The NMR measurements are processed to generate a two dimensional diffusion relaxation map (a D/T2 map) which is in turn processed to compute the wettability.
    Type: Grant
    Filed: May 5, 2016
    Date of Patent: July 21, 2020
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Chanh Cao Minh, Steve Crary, Philip M. Singer, Andrea Valori, Henry N. Bachman
  • Patent number: 10697295
    Abstract: A method and system are described for imaging core samples associated with a subsurface region. The imaging results may be used to create or update a subsurface model and using the subsurface model and/or imaging results in hydrocarbon operations. The imaging techniques may include NMR imaging and CT imaging. Further, the imaging techniques may also include exposing the core sample to the imaging gas.
    Type: Grant
    Filed: February 6, 2018
    Date of Patent: June 30, 2020
    Assignee: ExxonMobil Upstream Research Company
    Inventors: Antonio S. Buono, Shawn Fullmer, Hubert E. King, Jr., Michael Sansone, Pavel Kortunov, John H. Dunsmuir, Bo Gao, James G. Kralik, Ye Xu
  • Patent number: 10697911
    Abstract: There is described a method for determining the relative quantities of the expected components in a multi-component mixture of solids. The proposed quantification method makes use of a time domain nuclear magnetic resonance (TD-NMR) spectrometer and requires that, for each of the expected components in the mixture, a T1 saturation recovery curve (SRCi) is measured and recorded. The saturation recovery curve for the mixture sample (SRCmix) is determined from a measurement of the sample with the spectrometer. The relative amounts of the expected components present in the mixture sample are determined by fitting a linear combination of the component SRCs (SRCi) to the SRCmix. The resulting value of each weighting coefficient in the fit provides the relative proportion of the corresponding component in the overall sample.
    Type: Grant
    Filed: February 10, 2017
    Date of Patent: June 30, 2020
    Inventors: Dirk Stueber, Stefan Jehle
  • Patent number: 10697286
    Abstract: A method of identifying a material and/or condition of a material in a borehole is described, together with related apparatus. The material may either be between first and second tubulars or between a first tubular and a wall of the borehole. The method may include providing a reference quality factor (Qreference) for one or more known materials in one or more known conditions and measuring a downhole quality factor (Qmeasured) of the material and/or material condition to be identified. A spectral ratio ?=(Qmeasured/Qreference) may then be computed for one or more known materials under one or more known conditions followed by an analysis of the spectral ratios to identify the material and/or condition of the material in the borehole.
    Type: Grant
    Filed: April 29, 2016
    Date of Patent: June 30, 2020
    Assignee: STATOIL PETROLEUM AS
    Inventor: Ioan-Alexandru Merciu
  • Patent number: 10684342
    Abstract: In one embodiment, an MRI apparatus includes: an MRI scanner configured to acquire N+1 or more diffusion-weighted images by differently setting parameter values among the diffusion-weighted images, with regard to N types of parameters, wherein N is a natural number equal to or more than two; and processing circuitry configured to generate a computed diffusion-weighted image having an arbitrary value for at least one of the N types of parameters, based on relationship between signal values of the acquired diffusion-weighted images and the parameter values differently set among the acquired diffusion-weighted images.
    Type: Grant
    Filed: March 18, 2016
    Date of Patent: June 16, 2020
    Assignee: Canon Medical Systems Corporation
    Inventor: Tokunori Kimura
  • Patent number: 10677957
    Abstract: The instant invention relates to a method for noise reduction from a magnetic resonance sounding (MRS) oscillating signal, and more particularly, to a data processing method for reducing random noise contained in MRS oscillating signal based on joint algorithm principles of EMD and TFPF. A MRS oscillating signal is decomposed into different eigen-mode components by using decomposition characteristic of EMD algorithm; then a signal-dominated eigen-mode component is encoded as an instantaneous frequency of an analytical signal of unit amplitude using TFPF algorithm; and random noise is suppressed with the characteristics that the time-frequency distribution of the analytical signal is concentrated along with the instantaneous frequency. The method requires fewer filtering constraints and is simple to operate without need of designing a filtering interval in the time-frequency domain, and has good adaptability to the MRS oscillating signal with a low signal-noise-ratio.
    Type: Grant
    Filed: April 3, 2018
    Date of Patent: June 9, 2020
    Assignee: Jilin University
    Inventors: Tingting Lin, Yang Zhang, Yue Li, Ling Wan, Jun Lin
  • Patent number: 10663615
    Abstract: Nuclear magnetic resonance (NMR) tools, logging systems, and methods for measuring NMR properties of earth formations in a region of interest are provided. The NMR tool includes an antenna assembly, a magnet assembly, a compensating assembly, and a motion sensor. The antenna assembly is operable to generate a radio-frequency magnetic field and the magnet assembly is operable to generate a static magnetic field. The motion sensor is operable to generate readings for lateral motion of the antenna and magnet assemblies. The compensating assembly contains at least one electromagnet and is operable to reduce variation of the static magnetic field in the region of interest due to the lateral motion during NMR measurements based on the readings for the lateral motion.
    Type: Grant
    Filed: March 9, 2017
    Date of Patent: May 26, 2020
    Assignee: Halliburton Energy Services, Inc.
    Inventor: Arcady Reiderman
  • Patent number: 10633969
    Abstract: One methods for in-situ characterization of a reservoir rock includes: (a) sealing an interval corresponding to a selected depth or depths within the subterranean formation; (b) injecting a displacement fluid into the interval, wherein the displacement fluid displaces a reservoir fluid stored in the reservoir rock; (c) monitoring movement of the displacement fluid or the reservoir fluid in the reservoir rock; and (d) assessing wettability of the reservoir rock based on (c) or determining recovery rate of the reservoir fluid.
    Type: Grant
    Filed: July 22, 2014
    Date of Patent: April 28, 2020
    Assignee: ConocoPhillips Company
    Inventors: James J. Howard, Siluni Wickramathilaka
  • Patent number: 10605950
    Abstract: A formation evaluation system reduces inversion matrixes used to determine formation properties, thereby increasing the memory management and processing efficiency of the evaluation system. NMR data is acquired from a wellbore and expressed mathematically by the system as a least squares solution to a linear system. The least squares solution is approximated using a numerical decomposition method and the evaluation system determines a formation property using the approximated least squares solution. Thereafter, a downhole operation may be planned, analyzed or conducted using the determined formation property.
    Type: Grant
    Filed: April 17, 2017
    Date of Patent: March 31, 2020
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Wei Shao, Songhua Chen
  • Patent number: 10585083
    Abstract: This disclosure describes systems and methods to predict viscosity of heavy oil in a geological formation, even when the geological formation also contains water such as clay-bound water, using a downhole nuclear magnetic resonance (NMR) tool. The downhole NMR tools may obtain responses include distributions of a first relaxation time T1, a second relaxation time T2, or diffusion, or a combination of these. The responses of the NMR measurements that are due to water are separated from the responses of the NMR measurements that are due to heavy oil. The responses of the NMR measurements due to heavy oil are then related to likely values of viscosity of the heavy oil based on empirical or simulated measurements.
    Type: Grant
    Filed: June 13, 2016
    Date of Patent: March 10, 2020
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventor: Vivek Anand
  • Patent number: 10564088
    Abstract: Described herein are apparatuses for analyzing an optical signal decay. In some embodiments, an apparatus includes: a source of a beam of pulsed optical energy; a sample holder configured to expose a sample to the beam; a detector comprising a number of spectral detection channels configured to convert the optical signals into respective electrical signals; and a signal processing module configured to perform a method. In some embodiments, the method includes: receiving the electrical signals from the detector; mathematically combining individual decay curves in the electrical signals into a decay supercurve, the supercurve comprising a number of components, each component having a time constant and a relative contribution to the supercurve; and numerically fitting a model to the supercurve.
    Type: Grant
    Filed: April 23, 2018
    Date of Patent: February 18, 2020
    Assignee: Kinetic River Corp.
    Inventors: Giacomo Vacca, Ralph Jimenez
  • Patent number: 10564308
    Abstract: Certain aspects of the present disclosure provide methods and apparatus for performing electron paramagnetic resonance (EPR) spectroscopy on a fluid from a flowing well, such as fluid from hydrocarbon recovery operations flowing in a downhole tubular, wellhead, or pipeline. One example method generally includes, for a first EPR iteration, performing a first frequency sweep of discrete electromagnetic frequencies on a cavity containing the fluid; determining first parameter values of reflected signals from the first frequency sweep; selecting a first discrete frequency corresponding to one of the first parameter values that is less than a threshold value; activating a first electromagnetic field in the fluid at the first discrete frequency; and while the first electromagnetic field is activated, performing a first DC magnetic field sweep to generate a first EPR spectrum.
    Type: Grant
    Filed: January 19, 2018
    Date of Patent: February 18, 2020
    Assignee: MICROSILICON INC.
    Inventors: Manuel Godoy, Aydin Babakhani, Omar Kulbrandstad, John Lovell
  • Patent number: 10557809
    Abstract: Methods and related systems are described for estimating fluid or rock properties from NMR measurements. A modified pulse sequence is provided that can directly provide moments of relaxation-time or diffusion distributions. This pulse sequence can be adapted to the desired moment of relaxation-time or diffusion coefficient. The data from this pulse sequence provides direct estimates of fluid properties such as average chain length and viscosity of a hydrocarbon. In comparison to the uniformly-spaced pulse sequence, these pulse sequences are faster and have a lower error bar in computing the fluid properties.
    Type: Grant
    Filed: May 9, 2017
    Date of Patent: February 11, 2020
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Lalitha Venkataramanan, Tarek M. Habashy, Denise E. Freed
  • Patent number: 10557962
    Abstract: Nuclear magnetic resonance (NMR) well logs are obtained from a well in the reservoir measures of the total fluid, including both water and hydrocarbon, in the shale of the reservoir. NMR measurement at the surface of shale subsurface samples obtained in from drill cuttings or core samples of the same well provide measures of total water content of the shale. At the surface, pressure on the subsurface sample becomes that of atmospheric pressure, and hydrocarbon gas contained in the shale cuttings bleeds off. The remaining fluid within the shale cuttings is then only water, which can be measured using NMR techniques. Compensation for the effect of drilling fluids (drilling mud) on the NMR measures from the fluid cuttings is also performed. The hydrocarbon gas content of the formation shale can be determined from the difference between formation NMR well log readings and NMR measurements from subsurface sample.
    Type: Grant
    Filed: September 16, 2016
    Date of Patent: February 11, 2020
    Assignee: Saudi Arabian Oil Company
    Inventors: Jinhong Chen, Stacey M. Althaus, Daniel T. Georgi, Hui-Hai Liu
  • Patent number: 10552553
    Abstract: A multiple curve capillary pressure data set derived from a core sample is discriminated into groups of similar curves representing similar pore structure groups. Primary reservoir development controlling factors (RDCFs) are identified for each pore structure group and a set of capillary pressure type curves are created for each pore structure group to statistically characterize saturation-pressure response. Data is processed from a core sample log to derive identified RDCFs from the log data. A preliminary reservoir development designation log is derived by applying cutoffs to the log-based RDCFs and a preliminary saturation distribution equivalent to the preliminary reservoir development designation log is obtained by applying the capillary pressure type curves. A capillary pressure type uncertainty envelope is compared with saturation measurements from the log. The modelled saturation from the average capillary pressure type curve is recalculated to generate an optimized reservoir development designation.
    Type: Grant
    Filed: August 17, 2015
    Date of Patent: February 4, 2020
    Assignee: Saudi Arabian Oil Company
    Inventors: David Forsyth, Yusuf Ziya Pamukcu, Nasr-Eddine Hammou
  • Patent number: 10545105
    Abstract: A method of estimating a property of a porous media including: saturating a sample of the porous media with a fluid; spinning the sample in a centrifuge; obtaining a saturation profile of the sample; identifying a portion of the sample in which saturation of the sample is within 10% of a minimum saturation of the sample; and measuring a first property of the porous media on the identified portion of the sample.
    Type: Grant
    Filed: July 27, 2017
    Date of Patent: January 28, 2020
    Assignee: Saudi Arabian Oil Company
    Inventors: Jun Gao, Hyung Tae Kwak, Ahmad Mubarak Al-Harbi
  • Patent number: 10539705
    Abstract: 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.
    Type: Grant
    Filed: October 22, 2015
    Date of Patent: January 21, 2020
    Assignee: BAKER HUGHES, A GE COMPANY, LLC
    Inventors: Radu Coman, Holger Tietjen, Holger F. Thern, Martin Blanz
  • Patent number: 10534055
    Abstract: The present invention relates to a method for determining a non-oil volume of a rock sample comprising: receiving a rock sample; and receiving a non-oil zone in a NMR map using a T1T2 sequence, the non-oil zone being associated to non-oil in the map; Then, determining a first NMR map of the received rock sample using a T1T2 sequence, and determining a volume of non-oil in the received rock sample based on an integral in an integration zone of the firstNMR map. The integration zone of the first NMR map being determined based on the received non-oil zone, and a calibration value.
    Type: Grant
    Filed: June 9, 2015
    Date of Patent: January 14, 2020
    Assignee: TOTAL SA
    Inventors: Benjamin Nicot, Jean-Pierre Korb, Bérangère Rousseau
  • Patent number: 10524686
    Abstract: Methods for quickly estimating apparent diffusion coefficient probability density functions (ADC PDFs) for each image voxel are provided using a “diffusion reproducibility evaluation and measurement” (DREAM) magnetic resonance sequence. Non-diffusion-weighted (reference) images collected simultaneously have blood oxygenation level dependent (BOLD) sensitivity that can be used for resting-state fMRI data to measure functional connectivity, an unbiased parameter reflecting neurological integrity. ADC coefficient of variation (ADC CV) measurements can be used to isolate and label regions of non-enhancing tumor and predict future enhancement independent of FLAIR, T2, or average ADC maps. Functional diffusion mapping (fDMs) using voxel-wise changes in ADC PDFs can be used to spatially visualize and statistically quantify response to treatment.
    Type: Grant
    Filed: December 1, 2015
    Date of Patent: January 7, 2020
    Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventor: Benjamin M. Ellingson
  • Patent number: 10527470
    Abstract: An apparatus, method and non-transitory computer readable medium method are described for identifying the phase fractions and flow-rate of a petroleum carrying pipeline with three-phase wavy-stratified flow. A set of semi-cylindrical electrodes are mounted on the internal surface of a pipe to monitor the total capacitance and resistance of the three-phase contents. The phase fractions are determined by relating the resistance and capacitance to the phase-angles associated with the interfaces between water, oil and gas phases of the mixture. To calculate the flow rate, measured capacitances from two sets of electrodes with known separation distance are cross-correlated to determine time delay. Communications circuitry transmits the measurements to a remote control center for monitoring. Calculated and measured results demonstrate close agreement. The percentage error exhibited by the proposed inclined capacitive plate technique is calculated and compared with published values.
    Type: Grant
    Filed: December 11, 2018
    Date of Patent: January 7, 2020
    Assignee: King Fahd University of Petroleum and Minerals
    Inventors: Essam E. M. Hassan, Sharif I. M. Sheikh
  • Patent number: 10527566
    Abstract: A nuclear magnetic resonance (NMR) system and method for determining oil and water composition in drilling mud by separating out signals from oil and water in a two dimensional relaxation space wherein the oil and water ratio is a function of the separated out signals. The spin-lattice relaxation time distribution or a spin-spin relaxation time distribution of the sample is measured and a spin-lattice versus spin-spin or a spin-spin versus diffusion two-dimensional procedure is applied to separate the components of the drilling fluid. The signal intensities from the oil and water regions of the one-dimensional or two-dimensional NMR measurements are used to quantify the relative portion of the proton NMR signal from the oil and water and to determine the ratio of oil and water in the drilling mud.
    Type: Grant
    Filed: November 14, 2016
    Date of Patent: January 7, 2020
    Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Michael J. McCarthy, Victor Lim, Lu Zhang
  • Patent number: 10527748
    Abstract: A nuclear magnetic resonance device for subterranean characterization includes a tool body, a peripheral measurement device, and a controller. The tool body includes a permanent magnet located therein, permanent magnet inducing a static magnetic field (B0) in a region of interest. The peripheral measurement device is coupled to the tool body. The measurement device includes a radio frequency coil controllable to generate a radio frequency magnetic field (B1) in the region of interest, receive a response signal, or both. The controller is communicatively coupled to the radio frequency coil and controllable to drive the radio frequency coil, process the response signal, or both.
    Type: Grant
    Filed: August 8, 2016
    Date of Patent: January 7, 2020
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Lilong Li, Songhua Chen, Arcady Reiderman
  • Patent number: 10509091
    Abstract: Various systems and methods for detecting electron spins using electron paramagnetic resonance are described. An excitation signal generator configured to generate an excitation signal of varying amplitude and phase as compared to a reference signal may be present. A crossed-loop resonator configured to isolate a detection signal produced by the excitation signal exciting an object with a magnetic field may also be present. Further, a detection device configured to detect electron spins of the object using the detection signal isolated by the crossed-loop resonator may be present.
    Type: Grant
    Filed: March 7, 2013
    Date of Patent: December 17, 2019
    Assignee: Colorado Seminary, which owns and operates the University of Denver
    Inventors: Mark Tseitlin, Richard Quine, George Rinard, Gareth Eaton, Sandra Eaton
  • Patent number: 10502799
    Abstract: Various embodiments include a fiber optic nuclear magnetic resonance (NMR) sensor tool device and systems. One such tool includes a permanent magnet that generates a static magnetic field. A transmit antenna in the tool can operate to transmit a time-varying signal that is orthogonal to the static magnetic field. A fiber optic sensor element includes a coating that phase modulates a light signal traveling in the fiber when the coating is exposed to a varying field (e.g., a received, reflected magnetic field corresponding to the transmitted time-varying signal). The coating may be one of a magnetostrictive coating or a piezoelectric coating. Additional apparatus, systems, and methods are disclosed.
    Type: Grant
    Filed: March 31, 2015
    Date of Patent: December 10, 2019
    Assignee: Halliburton Energy Services, Inc.
    Inventors: George David Goodman, Burkay Donderici
  • Patent number: 10495589
    Abstract: The present disclosure describes methods and systems, including computer-implemented methods, computer program products, and computer systems, for determining a permeability of a rock sample. One method includes measuring a first set of Nuclear Magnetic Resonance (NMR) relaxation times for the rock sample saturated with regular water (H2O); injecting heavy water (D2O) into the rock sample; measuring a second set of NMR relaxation times for the rock sample after injecting D2O; calculating a pore connectivity factor based on the first set of NMR relaxation times and the second set of NMR relaxation times; and calculating the permeability of the rock sample based on the pore connectivity factor.
    Type: Grant
    Filed: April 17, 2018
    Date of Patent: December 3, 2019
    Assignee: Saudi Arabian Oil Company
    Inventors: Hyung Tae Kwak, Ahmad Mubarak Al-Harbi
  • Patent number: 10488352
    Abstract: Certain techniques for Nuclear Magnetic Resonance (NMR) whole core logging are described. NMR tests are performed on a standard sample using a NMR radio frequency (rf) coil having a length. A response map of the NMR rf coil is determined. The response map relates multiple relative NMR rf coil positions to multiple relative signal intensities. The NMR tests are performed using the NMR rf coil on a rock sample containing fluid. A length of the rock sample is greater than the NMR rf coil. Fluid content in the sample is determined using results of the NMR tests using the NMR rf coil on the rock sample and using the response map for the NMR rf coil and a mathematical deconvolution to obtain high resolution. The same method can be used to obtain high spatial resolution NMR log measurement in the reservoir.
    Type: Grant
    Filed: January 17, 2018
    Date of Patent: November 26, 2019
    Assignee: Saudi Arabian Oil Company
    Inventors: Jin-Hong Chen, Stacey M. Althaus, Mohammad Delshad, Yang Zhao
  • Patent number: 10481291
    Abstract: An imager and method for imaging fluid of a subsurface formation is disclosed. The imager includes a housing having a sidewall defining a passage to receive a core sample of the subsurface formation therethrough. The housing is positioned in a downhole tool and has a fluid inlet to receive fluid from the subsurface formation into the passage. The imager also includes a permanent magnet positioned in the sidewall of the housing, a radio frequency coil positioned in the sidewall of the housing between the permanent magnet and the passage, a gradient field in the sidewall of the housing between the permanent magnet and the radio frequency coil, and a chemically-selective imager. The chemically-selective imager is operatively connected to the radio frequency coil to selectively pulse frequencies according to a pulse sequence whereby individual fluid measurements of the sample are generated.
    Type: Grant
    Filed: March 2, 2017
    Date of Patent: November 19, 2019
    Assignee: SHELL OIL COMPANY
    Inventors: Matthias Appel, Benjamin Charles Anger, Hilko de Jong, Lynn Faith Gladden, Michael David Mantle, Andrew John Sederman, Nicholas Philip Ramskill
  • Patent number: 10472936
    Abstract: A mineralogy composition of a formation of interest is determined using core samples or downhole measurements. A dry permittivity is determined for each identified mineral. A volumetric mixing law is employed using the determined mineralogy composition and the determined dry permitivities. An effective matrix permittivity is determined using results from the volumetric mixing law. Dielectric dispersion measurements of the subject formation are acquired using the core samples or the downhole measurements. A dielectric petrophysical model is produced using the dielectric dispersion measurements and the effective matrix permittivity. A water saturation is estimated based on the dielectric petrophysical model. Nuclear magnetic resonance (NMR) T2 measurements having short echo spacings are acquired. A NMR petrophysical model is generated based on the NMR T2 measurements. A total porosity is determined based on the generated NMR petrophysical model.
    Type: Grant
    Filed: May 21, 2019
    Date of Patent: November 12, 2019
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Khaled Hadj-Sassi, Mohammed Badri
  • Patent number: 10473600
    Abstract: 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.
    Type: Grant
    Filed: December 22, 2015
    Date of Patent: November 12, 2019
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Chang S. Shin, Paul Joseph Ganssle, Shriram Sarvotham, Songhua Chen
  • Patent number: 10466381
    Abstract: A method for estimating a property of a subsurface material includes: conveying a carrier through a borehole penetrating the subsurface material; performing at least two magnetic resonance (NMR) measurements in a volume of interest in the subsurface material using an NMR tool disposed on the carrier, wherein (i) a first NMR measurement has a first wait time and a first first-echo time and a second NMR measurement has a second wait time and a second first-echo time, (ii) the first wait time and the second wait time are less than or equal to 500 milliseconds, and (iii) the first first-echo time and the second first-echo time are different; receiving at least the first-echo of the first NMR measurement and receiving at least the first-echo of the second NMR measurement; and estimating the property of the subsurface material by using the at least two measured first-echoes simultaneously.
    Type: Grant
    Filed: December 28, 2015
    Date of Patent: November 5, 2019
    Assignee: BAKER HUGHES, A GE COMPANY, LLC
    Inventor: Radu Coman
  • Patent number: 10444171
    Abstract: The longitudinal relaxation times (T1) of water and hydrocarbon inside porous media, such as rock from subsurface formations, behave differently when external magnetic fields vary. A Nuclear Magnetic Relaxation Dispersion (NMRD) profile from Fast Field Cycling Nuclear Magnetic Resonance (FFC-NMR) technique differentiates the type of fluids filling the pores. Different types of pores in a rock sample are filled with different fluids, water and hydrocarbon, and the absolute porosity and the pore size of each type of pores is determined.
    Type: Grant
    Filed: February 15, 2019
    Date of Patent: October 15, 2019
    Assignee: Saudi Arabian Oil Company
    Inventors: Hyung T. Kwak, Ali A. Al-Yousif, Salah H. Al-Saleh
  • Patent number: 10444190
    Abstract: A method for optimizing eddy current measurements includes conveying an electromagnetic tool through a borehole. The method further includes transmitting an excitation signal from the tool. The method further includes recording an eddy current response to the excitation signal from one or more tubings and casings within the borehole before the fall time of the excitation signal.
    Type: Grant
    Filed: July 13, 2015
    Date of Patent: October 15, 2019
    Assignee: HALLIBURTON ENERGY SERVICES, INC.
    Inventors: Reza Khalaj Amineh, Burkay Dondericl, Luis Emilio San Martin
  • Patent number: 10436727
    Abstract: A tool having a pump-out unit, pumping unit, and NMR unit is disposed in a wellbore. On a pump-up cycle, after removing borehole fluids, a fluid is injected into a region of investigation. NMR measurements are made while fluid migrates into the region of investigation. On a production cycle, pressure is removed, allowing fluid to exit the formation while NMR measurements are made. A rate of fluid production is estimated using the time-dependent NMR measurements. Alternatively, the mass of a sample is measured. Fluid is injected into the sample and the mass of the injected sample is measured. Pressure is removed and the mass of the injected sample as the fluid migrates out of the sample is measured. The change in mass of the injected sample as the fluid migrates out of the sample is determined and a rate of fluid production is estimated using the determined change in mass.
    Type: Grant
    Filed: May 13, 2016
    Date of Patent: October 8, 2019
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Andrea Valori, Reza Taherian, Farhan Ali, Wael Abdallah, Mohammed Badri, Richard Lewis
  • Patent number: 10436860
    Abstract: A side-looking Nuclear Magnetic Resonance (“NMR”) logging tool is designed to reduce and/or eliminate a borehole signal. The logging tool includes a magnetic assembly and a radio frequency (“RF”) transceiver antenna. The axial extent of the RF transceiver antenna has a length selected to reduce a borehole signal.
    Type: Grant
    Filed: November 12, 2014
    Date of Patent: October 8, 2019
    Assignee: HALIBURTON ENERGY SERVICES, INC
    Inventors: Lilong Li, Rebecca Jachmann, Arcady Reiderman
  • Patent number: 10429536
    Abstract: A method for processing nuclear magnetic resonance (NMR) measurement data includes receiving, with a processor, NMR measurement data obtained from an NMR tool, the NMR measurement data having an echo train affected by a motion artifact, wherein the motion artifact is related to a magnetic field magnitude that varies in a volume of interest due to a motion of the NMR tool. The method further includes reducing, with the processor, an effect on the NMR measurement data of the motion artifact by using a correcting inversion method that models the motion artifact to provide a corrected transverse relaxation time constant (T2) distribution, the correcting inversion method having a multiplicative term having a term that includes at least one local maximum and an optional decay term.
    Type: Grant
    Filed: April 4, 2016
    Date of Patent: October 1, 2019
    Assignee: BAKER HUGHES, A GE COMPANY, LLC
    Inventors: Tobias Kischkat, Radu Coman, Holger Frank Thern
  • Patent number: 10422842
    Abstract: Various embodiments include apparatus and methods to conduct measurements on a structure using a nuclear magnetic resonance tool. The nuclear magnetic resonance tool can be operated to make nuclear magnetic resonance measurements that generate transverse 5 relaxation time echo train sequences ending with a recovery pulse. Additional apparatus, systems, and methods are disclosed.
    Type: Grant
    Filed: December 14, 2012
    Date of Patent: September 24, 2019
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Rebecca Corina Jachmann, Jie Yang, Christopher Jon Conrad
  • Patent number: 10422733
    Abstract: Disclosed herein are methods for testing wettability of tight oil reservoir. The method comprises: by using a nuclear magnetic resonance testing method, testing nuclear magnetic resonance maps of the tight oil reservoir in the saturated water state and in the saturated oil state; by using the nuclear magnetic resonance maps, analyzing a water-wetting degree and an oil-wetting degree of the tight oil reservoir; calculating a mixed wettability index of the tight oil reservoir, and estimating the wettability of the tight oil reservoir according to the mixed wettability index. This disclosure can effectively improve testing efficiency, quantitatively analyze the water-wetting degree and the oil-wetting degree of the tight oil reservoir, and improve accuracy of testing results.
    Type: Grant
    Filed: April 18, 2017
    Date of Patent: September 24, 2019
    Assignee: PetroChina Company Limited
    Inventors: Zhengming Yang, Yutian Luo, Xuewu Wang, Xuewei Liu, Shengchun Xiong, Yapu Zhang, Ying He
  • Patent number: 10422759
    Abstract: NMR logging of hydrocarbon formations may be performed with a gradient multi-frequency NMR technique using an increased packing density of the sensitive volumes such that the radiofrequency (RF) pluses for adjacent sensitive volumes interfere. An exemplary method may include applying first and second sequences of RF pulses at first and second frequencies, respectively, the second sequence being applied at a time interval following the first sequence; acquiring the NMR relaxation data from first and second sensitive volumes corresponding to the first and second frequencies, respectively; and selecting the first and second frequencies and the time interval to allow for interference between the first sequence of RF pulses and the NMR relaxation data from the second sensitive volume in order to increase a signal-to-noise ratio and a signal-to-noise ratio per square root of time of the NMR relaxation data.
    Type: Grant
    Filed: August 14, 2015
    Date of Patent: September 24, 2019
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Arcady Reiderman, Shriram Sarvotham
  • Patent number: 10416259
    Abstract: Apparatus, methods, and other embodiments associated with NMR fingerprinting are described. One example NMR apparatus includes an NMR logic configured to repetitively and variably sample a (k, t, E) space associated with an object to acquire a set of NMR signals. Members of the set of NMR signals are associated with different points in the (k, t, E) space. Sampling is performed with t and/or E varying in a non-constant way. The varying parameters may include flip angle, echo time, RF amplitude, and other parameters. The NMR apparatus may also include a signal logic configured to produce an NMR signal evolution from the NMR signals, a matching logic configured to compare a signal evolution to a known, simulated or predicted signal evolution, and a characterization logic configured to characterize a resonant species in the object as a result of the signal evolution comparisons.
    Type: Grant
    Filed: May 6, 2014
    Date of Patent: September 17, 2019
    Assignee: Case Western Reserve University
    Inventors: Mark Griswold, Nicole Seiberlich, Dan Ma, Vikas Gulani