Of Noncompressional Acoustic Wave Energy Patents (Class 367/31)
  • Patent number: 10365389
    Abstract: In accordance with embodiments of the present disclosure, systems and methods for taking acoustic/ultrasonic wave measurements of a wellbore using a downhole tool equipped with microelectromechanical (MEM) transducers are provided. The MEM transducers may include a plurality of MEM transmitters (e.g., MEM speakers) and a plurality of separate MEM receivers (e.g., MEM microphones). These MEM transducers may be disposed in arrays proximate an outer surface of the downhole tool to collect acoustic/ultrasonic wave measurements of the full circumference of a wellbore. Due to their small size, large numbers of MEM transducers may be distributed radially around the downhole tool. Such an arrangement of sensors may enable the downhole tool to perform measurements of the entire wellbore without the downhole tool needing to be rotated, leading to an increased signal-to-noise ratio of the measurements.
    Type: Grant
    Filed: November 17, 2015
    Date of Patent: July 30, 2019
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Tatiana Gilstrap, Yinghui Lu, John P. Granville, Yibing Zheng, David Alan Welsh
  • Patent number: 10359531
    Abstract: A technique facilitates monitoring of acoustic signals to measure a velocity vector of a borehole. Acoustic sensors are arranged in a desired acoustic sensor array and positioned along a body of a tool, e.g. a sonic logging tool. The acoustic sensor array is then positioned in fluid along a wall of a borehole formed in a subterranean formation. The acoustic sensors are used to collect acoustic signal data while the acoustic sensors are maintained in a non-contact position with respect to the wall of the borehole. The data may be processed to determine the desired velocity vector.
    Type: Grant
    Filed: June 8, 2017
    Date of Patent: July 23, 2019
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Henri-Pierre Valero, Jean-Christophe Auchere, Abderrhamane Ounadjela, Hiroshi Nakajima
  • Patent number: 10309825
    Abstract: A distributed acoustic sensing system for use in a wellbore can include a shutter positioned between an amplifier and an optical-wave flow controller of the distributed acoustic sensing system for reducing optical noise in the distributed acoustic sensing system. The distributed acoustic sensing system can also include a controller operable to transmit a signal to the shutter to (i) open the shutter for allowing an optical pulse to transmit through the shutter, and (ii) close the shutter for preventing an extraneous optical waveform, that generates at least a portion of the optical noise, from transmitting through the shutter.
    Type: Grant
    Filed: April 7, 2015
    Date of Patent: June 4, 2019
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Kwang Il Suh, Ira Jeff Bush
  • Patent number: 10215884
    Abstract: In some embodiments, an apparatus and a system, as well as a method and an article, may operate to acquire acoustic noise data by one or more receivers, the acoustic noise provided by a passive source comprising a down hole tool body moving within a borehole, and/or a positioning device or a measurement device attached to the tool body. Additional operations may include processing the acoustic noise data to determine receiver calibration parameters, and/or formation properties. Additional apparatus, systems, and methods are disclosed.
    Type: Grant
    Filed: August 17, 2011
    Date of Patent: February 26, 2019
    Assignee: Halliburton Energy Services, Inc.
    Inventor: Burkay Donderici
  • Patent number: 10197693
    Abstract: Methods and systems of barrier evaluation are disclosed. The method includes obtaining vibration measurement data measured in a wellbore having at least one casing. In addition, the method includes determining a boundary definition of the barrier between the casing and a formation, based on the vibration measurement data. Further, the method includes evaluating the barrier based on the one boundary definition. The system includes a vibration sensor located in the wellbore having at least one casing and a vibration source for generating vibrations. The system may also include a data logging system of producing vibration measurement data received with the vibration sensor and a processor for determining at least one boundary definition of barrier between the casing and a formation, based on the vibration measurement data and evaluating the barrier based on the at least one boundary definition.
    Type: Grant
    Filed: February 23, 2016
    Date of Patent: February 5, 2019
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Ram Sunder Kalyanraman, Bernard Georges Frignet
  • Patent number: 10175375
    Abstract: A system and method for effective estimation of properties of a formation using acoustic array processing is disclosed. An acoustic tool is directed to a zone of interest in the formation and generates a first signal. Real data corresponding to the first signal is then received. One or more basic parameters are provided as input. The basic parameters may include parameters relating to the acoustic tool or parameters relating to the zone of interest. A time semblance shear slowness and a frequency semblance shear slowness are determined using the basic parameters. A mask is then selected using the determined time semblance and frequency semblance shear slowness values and used to isolate a dispersion curve. A shear slowness value is selected from the dispersion curve and quality control is performed on the selected shear slowness value.
    Type: Grant
    Filed: October 25, 2016
    Date of Patent: January 8, 2019
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Pradip Kumar Mukhopadhyay, Batakrishna Mandal
  • Patent number: 10175094
    Abstract: The present techniques are directed to systems and methods for monitoring parameter data from sensors, for example, in a subsea environment. In one method, an electrical signal including data from the subsea unit is converted into an acoustic signal. The acoustic signal is directed through the water column towards a fiber optic cable. The acoustic signal is detected by changes in a light signal carried in the fiber optic cable, and the changes in the light signal are decoded to obtain a data stream representing the parameter data.
    Type: Grant
    Filed: November 3, 2015
    Date of Patent: January 8, 2019
    Assignee: ExxonMobil Upstream Research Company
    Inventors: Michael G. Starkey, Kevin T. Corbett
  • Patent number: 10108762
    Abstract: Conventional computational simulation and inversion of subsurface flow is expensive, which is wasteful in terms of time and energy consumption. The present invention discloses a process for implementation of mathematical techniques such as forward simulation, sensitivity analysis, and inversion to physical microstructure models for subsurface fluid simulation. This process not only offers accurate and reliable results, but also is cost effective.
    Type: Grant
    Filed: October 3, 2014
    Date of Patent: October 23, 2018
    Assignee: International Business Machines Corporation
    Inventors: Claudius Feger, Lior Horesh, Ulisses T. Mello, Maria J. B. Moura
  • Patent number: 10107927
    Abstract: A method for monitoring a subsurface during a 4-dimensional (4D) survey. The method includes obtaining an area of the subsurface that needs to be monitored; identifying receiver and source locations for the area and source frequencies to be emitted into the area based on demigration or inverse ray tracing; performing a light base survey for the area; performing a light monitor survey for the area; and generating an image of the area based on a comparison of (i) the light base survey, and (ii) the light monitor survey for the area.
    Type: Grant
    Filed: June 2, 2016
    Date of Patent: October 23, 2018
    Assignee: SPOTLIGHT
    Inventor: Habib Alkhatib
  • Patent number: 10060251
    Abstract: A method of measuring fluid flow conditions in a wellbore includes generating an acoustic probe signal during fluid flow along the wellbore, measuring the performance attribute of the acoustic probe signal within a target frequency range, and of the fluid medium in at least a part of the wellbore based on the measured performance parameters. The target frequency range of the acoustic probe signal encompasses a bubble resonance frequency range for vapor bubbles in the wellbore, for example having frequencies in excess of 20 kHz. An estimated bubble size value may be calculated based on determining a frequency at which the measured probe signal experiences the retardation or peak attenuation.
    Type: Grant
    Filed: November 19, 2013
    Date of Patent: August 28, 2018
    Assignee: HALLIBURTON ENERGY SERVICES, INC.
    Inventor: Christopher Lee Stokely
  • Patent number: 10041343
    Abstract: Various micro-sonic density imaging-while-drilling systems and methods are disclosed. In at least some forms, the micro-sonic logging tool is embodied in a drill collar having at least one stabilizer blade. One or more acoustic transmitters are set in a distal face of the stabilizer blade to generate acoustic waves. One or more receivers can also be set in the distal face of the stabilizer blade to detect P-waves and S-waves that have propagated through the formation making up the borehole wall. Processing circuitry measures the velocity or slowness of the acoustic waves and optionally associates the measured values with a spot on the borehole wall as identified. Multiple transmitters can be used if it is desired to obtain compensated measurements. The tool can further include a fluid cell to measure acoustical properties of the borehole fluid, which can be used to convert the formation slowness measurements into density measurements.
    Type: Grant
    Filed: September 22, 2010
    Date of Patent: August 7, 2018
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Roland E. Chemali, Moustafa E. Oraby
  • Patent number: 9897715
    Abstract: Various systems and methods are disclosed for implementing and using a multi-axial induction borehole imaging tool that includes emitters that induce, at azimuthally-spaced positions on a borehole wall, a plurality of fields having components in three non-coplanar directions within a formation. The tool also includes directionally sensitive inductive sensors that sense the components caused by each of the one or more inductive emitters, and a downhole controller that processes signals received from the directionally sensitive inductive sensors to provide a set of measurements representative of an impedance tensor at each position.
    Type: Grant
    Filed: June 29, 2012
    Date of Patent: February 20, 2018
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Burkay Donderici, Ferhat T. Celepcikay, Luis E. San Martin
  • Patent number: 9829597
    Abstract: Techniques involve obtaining acoustic data from an acoustic logging tool, where the acoustic data includes waves reflected from the casing, the annular fill material, the formation, and/or interfaces between any of the casing, the annular fill material, and the formation. A crude casing thickness, tool position (e.g., eccentering), mud sound velocity may be estimated using the acoustic data. A specular reflection signal may also be estimated based on the acoustic data. A modeled waveform may be generated using the estimated specular reflection signal and one or more model parameters, such as an estimated crude casing thickness, an estimated tool position, an estimated sound velocity of mud between the acoustic logging tool and the casing, an estimated impedance of the annular fill material, and an estimated impedance of the mud. The modeled waveform may be calibrated in some embodiments.
    Type: Grant
    Filed: October 20, 2015
    Date of Patent: November 28, 2017
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Smaine Zeroug, Jiaqi Yang, Sandip Bose
  • Patent number: 9757770
    Abstract: Apparatus and techniques are described, such as for obtaining information indicative of an acoustic characteristic of a formation, including using a transducer assembly, comprising a base plate, a first piezoelectric slab and a second piezoelectric slab. The base plate includes a first region extending axially in a first direction beyond the first and second piezoelectric slabs along a specified axis of the base plate and a second region extending axially in a second direction, opposite the first direction, beyond the first and second piezoelectric slabs. In various examples, a length of the first region along the specified axis is different than a length of the second region to provide an asymmetric configuration. In various examples, an anchoring element is mechanically coupled to the base plate at a location corresponding to a node location of a specified acoustic vibration mode.
    Type: Grant
    Filed: September 30, 2013
    Date of Patent: September 12, 2017
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Chung Chang, Chen Li, Arthur Cheng, Jing Jin
  • Patent number: 9746568
    Abstract: An example method for displaying sonic logging data associated with a formation surrounding a borehole can include acquiring sonic data at a plurality of depths using an acoustic array located in the borehole and transforming the acquired sonic data from a time-space domain to a frequency-wave number domain at a limited number of discrete frequencies. The method can also include estimating slowness values at the limited number of discrete frequencies from the transformed sonic data, interpolating the estimated slowness values to obtain a projection of one or more slowness-frequency dispersions of the acquired sonic data and displaying the projection of the slowness-frequency dispersions. The projection of the slowness-frequency dispersions can include a plurality of color bands corresponding to each of the limited number of discrete frequencies.
    Type: Grant
    Filed: July 28, 2014
    Date of Patent: August 29, 2017
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Toshihiro Kinoshita, Hiroaki Yamamoto, Takeshi Fukushima
  • Patent number: 9725987
    Abstract: A method of performing a stimulation operation for a subterranean formation penetrated by a wellbore is provided. The method involves collecting pressure measurements of an isolated interval of the wellbore during injection of an injection fluid therein, generating a fracture closure from the pressure measurements, generating transmissibility based on the fracture closure and a mini fall off test of the isolated interval during the injection, obtaining fracture geometry from images of the subterranean formation about the isolated interval, and generating system permeability from the transmissibility and the fracture geometry. The method may also involve deploying a wireline stimulation tool into the wellbore, isolating an interval of the wellbore and injecting fluid into the interval with the wireline stimulation tool. The fracture geometry may be obtained by imaging the formation, and fracture geometry may be obtained from core sampling.
    Type: Grant
    Filed: July 11, 2012
    Date of Patent: August 8, 2017
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Kevin Wutherich, Kirby Jon Walker, Walter Sawyer, Babatunde Ajayi
  • Patent number: 9672597
    Abstract: A method for reducing noise in flouroscopic images by detection of the traits in the curvelet domain, matching of the detected traits and time-domain filtering adapted to the type of coefficients associated with a trait. The method uses the discrete curvelet transforms of the images from a sequence. The denoised coefficients are detected, then transmitted to a step for locally matching the traits, the matched data subsequently undergo a step for time-domain filtering allowing the movement of the objects to be preserved in the image and a step for a 2D IDCT (Inverse Discrete Curvelet Transform) in order to produce the final image.
    Type: Grant
    Filed: June 25, 2014
    Date of Patent: June 6, 2017
    Assignee: THALES
    Inventors: Carole Amiot, Catherine Girard
  • Patent number: 9664816
    Abstract: An example method for fracture identification and characterization may include positioning a magnetic dipole transmitter and a magnetic dipole receiver within a borehole in a subterranean formation. At least one of the magnetic dipole transmitter and the magnetic dipole receiver may be tiled with respect to an axis of the borehole. The magnetic dipole transmitter may generate a time-varying electromagnetic (EM) signal. The magnetic dipole receiver may measure a response of the formation to the time-varying EM signal; the response may include at least two depths of a formation and at least two azimuthal orientations of the formation with respect to the axis of the borehole. An image of the formation may be generated based, at least in part, on the response, and at least one fracture characteristic may be determined based, at least in part, on the first image and a synthetic fracture image.
    Type: Grant
    Filed: December 6, 2013
    Date of Patent: May 30, 2017
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Burkay Donderici, Yumei Tang
  • Patent number: 9664039
    Abstract: The present disclosure involves a novel way of using drilling vibrations generated by the deformation of a rock formation in response to forces acting on the rock formation, where the forces are related to a drill bit and/or drilling fluid system, to identify the nature and occurrence of fractures, fracture swarms and other mechanical discontinuities (boundaries) such as bedding planes and/or faults that offset or otherwise separate rock formations with different mechanical rock properties.
    Type: Grant
    Filed: June 14, 2016
    Date of Patent: May 30, 2017
    Assignee: Fracture ID, Inc.
    Inventors: R. Christopher Neale, James D. Lakings
  • Patent number: 9605536
    Abstract: Acoustic data acquired in a MWD/LWD system can be compressed for transmission to the surface. The compression technique can include semblance processing acoustic signals received at a plurality of receivers spaced apart from a transmitter to generate a semblance projection at each of a plurality of depths. Peaks of the semblance projection can then be telemetered to the surface, with each peak including a slowness (velocity) value and a coherence (semblance) value. The telemetered values may be processed at the surface to generate logs as a function of depth.
    Type: Grant
    Filed: June 26, 2015
    Date of Patent: March 28, 2017
    Assignee: Weatherford Technology Holdings, LLC
    Inventor: Medhat Mickael
  • Patent number: 9557442
    Abstract: A method of simulating a borehole acoustic response in an anisotropic formation of the crust of the earth includes formulating a geometric model of the formation. The geometric model includes a plurality of layers definable in a cylindrical coordinate system defined by an axial direction normal to each of the layers, a radial direction relative to the axial direction, and a circumferential direction relative to the axial direction. The method also includes formulating a computational model of wave propagation in the formation. The computational model includes field variables and a wave equation describing a behavior of the field variables. The field variables are represented as respective Fourier series expansions of Tr-periodic harmonics in the circumferential direction. The method also includes numerically solving the computational model.
    Type: Grant
    Filed: February 11, 2010
    Date of Patent: January 31, 2017
    Assignee: MAERSK OLIE OG GAS A/S
    Inventor: Ole Jørgensen
  • Patent number: 9529110
    Abstract: To construct a reduced order model of a subterranean structure, a model reduction algorithm is applied to produce the reduced order model that is an approximation of a true model of the subterranean structure. The model reduction algorithm uses interpolating frequencies that are purely imaginary to enhance computational efficiency of the algorithm.
    Type: Grant
    Filed: January 21, 2009
    Date of Patent: December 27, 2016
    Assignee: WESTERNGECO L. L. C.
    Inventors: Vladimir Druskin, Mikhail Zaslavsky
  • Patent number: 9523784
    Abstract: Methods and systems for investigating a formation surrounding a wellbore. The methods involve a semblance-based analysis of downhole data, for example low frequency downhole data. The semblance-based analysis includes group semblance mapping of the data, followed by single shot semblance map handling, followed by multiple shot data handling. The systems include a seismic source, a seismic receiver, and an electronics system for processing data according to a process including: group semblance mapping, single shot map handling, and multiple shot data handling. The seismic source may generate low frequency signals, and the seismic receiver may be two or more receiver subsystems that include at least two axially spaced-apart hydrophones and at least one multi-component geophone.
    Type: Grant
    Filed: December 18, 2012
    Date of Patent: December 20, 2016
    Assignee: Schlumberger Technology Corporation
    Inventor: Jacques Orban
  • Patent number: 9494705
    Abstract: Cased-hole radial profiling of shear parameters from sonic measurements is disclosed.
    Type: Grant
    Filed: August 13, 2012
    Date of Patent: November 15, 2016
    Assignee: Schlumberger Technology Corporation
    Inventor: Bikash K. Sinha
  • Patent number: 9417352
    Abstract: Systems and methods for the estimating a plurality of anisotropic elastic constants (Cij) using borehole dispersions and refracted compressional headwave velocity at a single logging depth in a vertical, deviated, or horizontal wellbore in a transversely-isotropic with a vertical axis of symmetry (“TIV”) formation. The estimated elastic constants can then be used to calculate near-wellbore stress distributions in the wellbore, which aids in an optimal completion design, such as for shale-gas production in the presence of shale heterogeneity.
    Type: Grant
    Filed: June 12, 2013
    Date of Patent: August 16, 2016
    Assignee: Schlumberger Technology Corporation
    Inventor: Bikash K. Sinha
  • Patent number: 9406151
    Abstract: A non-transitory computer-readable medium stores therein a data storage program causing a computer to execute a process. The process includes obtaining first data by grouping values of spatially discrete distribution points at each of times by each of the spatially discrete distribution points and chronologically sorting the grouped values, obtaining second data by compressing the first data in accordance with at least one of a plurality of compression conditions for each of the distribution points or each group of a plurality of the distribution points, the plurality of compression conditions including a necessity of compression, a compression interval, and a compression algorithm type, and storing the second data in a storage device.
    Type: Grant
    Filed: March 9, 2012
    Date of Patent: August 2, 2016
    Assignee: FUJITSU LIMITED
    Inventor: Eiji Ohta
  • Patent number: 9366777
    Abstract: The present disclosure relates to methods and apparatuses for evaluating a porous earth formation. The method may include: generating an acoustic wave in a borehole fluid; measuring an attenuation of the acoustic wave; and estimating a permeability of an earth formation acoustically coupled to the borehole fluid using the estimated attenuation and a theoretical attenuation. The method may also include estimating a theoretical attenuation for the borehole fluid using acoustic properties of the borehole fluid. The apparatus for performing the method may include: an acoustic source, an acoustic sensor, and a processor configured to estimate the attenuation of an acoustic wave generated by the acoustic source.
    Type: Grant
    Filed: September 2, 2011
    Date of Patent: June 14, 2016
    Assignee: Baker Hughes Incorporated
    Inventors: Vitaly N. Dorovsky, Evgeny Igorevich Romensky, Anton Vladimirovich Sinev
  • Patent number: 9354342
    Abstract: A method of processing acoustic waveform data is disclosed. An acoustic logging tool acquires acoustic waveform data. An adaptive frequency filter is determined. The acoustic waveform data is filtered using the adaptive frequency filter. A formation slowness is determined from the filtered acoustic waveform data. The lower bound of the adaptive frequency filter may be determined using a polynomial function of a minimum excitement frequency parameter, a slowness parameter, and a third parameter. The upper bound of the adaptive frequency filter may be determined using a polynomial function of a peak excitement frequency parameter, the slowness parameter, and the third parameter.
    Type: Grant
    Filed: March 15, 2011
    Date of Patent: May 31, 2016
    Assignee: Halliburton Energy Services, Inc.
    Inventor: Batakrishna Mandal
  • Patent number: 9348052
    Abstract: In some embodiments, apparatus and systems, as well as methods, may operate to record a plurality of acoustic waveforms corresponding to acoustic waves received at azimuthally orthogonal dipole receiver arrays surrounded by a geological formation, the waves being generated by azimuthally orthogonal transmitter arrays. Further activity may include analytically estimating a global minimum of a predefined objective function with respect to an azimuth angle at a point in an auxiliary parameter space associated with a set of auxiliary parameters, minimizing the objective function at the analytically estimated angle with respect to the auxiliary parameters, removing existing ambiguities associated with the fast and slow principal flexural wave axes, and determining at least one property of the geological formation based on the global minimum. Additional apparatus, systems, and methods are disclosed.
    Type: Grant
    Filed: August 28, 2012
    Date of Patent: May 24, 2016
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Mark V. Collins, Arthur Cheng
  • Patent number: 9207342
    Abstract: A method is described for determining a shear wave velocity of a transversely isotropic region of an earth formation traversed by a wellbore with a non-zero relative dip angle between a longitudinal axis of the wellbore and an axis of symmetry of the TI region. A sonic tool is used to measure shear velocities in the TI region with polarizations orthogonal to the longitudinal axis of the wellbore. One of the shear velocities is identified as a quasi-shear velocity. A shear wave velocity is calculated, as a function of the quasi-shear velocity, for propagation in a direction along the axis of symmetry of the TI region. Where the orientation of the sonic tool is not known and the measured shear velocities comprises a fast shear velocity and a slow shear velocity, the method comprises identifying either the fast or the slow shear velocity as a quasi-shear mode.
    Type: Grant
    Filed: March 9, 2012
    Date of Patent: December 8, 2015
    Assignee: Chevron U.S.A. Inc.
    Inventor: Gregory John Ball
  • Patent number: 9188698
    Abstract: A downhole tool, having a central axis defined, may selectively include a sensor section including one or more arms connected to the tool body with an open/close mechanism. The open/close mechanism is configured to move in a radial direction with respect to the axis of the tool body. The tool also includes at least one sensor attached to the arm, and the tool may include at least one transmitter section on the tool. The transmitter is configured to transmit acoustic energy to a formation.
    Type: Grant
    Filed: March 27, 2009
    Date of Patent: November 17, 2015
    Assignee: Schlumberger Technology Corporation
    Inventors: Hitoshi Tashiro, Jahir Pabon
  • Patent number: 9075159
    Abstract: A system and computer-implemented method for determining properties of a subsurface region of interest from seismic data include obtaining seismic data and an initial earth property model, forward modeling using the initial earth property model to create modeled seismic data, transforming the modeled and actual seismic data to create frequency domain modeled and actual seismic data including amplitude portion and phase portions, measuring the misfit between the frequency domain modeled and actual seismic data to produce frequency domain residual seismic data, performing phase unwrapping of certain observed frequency components of the frequency domain residual seismic data to create an unwrapped residual phase portion, and inverting the unwrapped residual phase portion to determine desired properties of the subsurface region of interest.
    Type: Grant
    Filed: June 8, 2011
    Date of Patent: July 7, 2015
    Assignee: Chevron U.S.A., Inc.
    Inventors: John Kenneth Washbourne, Nikhil Koolesh Shah, Kenneth Paul Bube
  • Patent number: 9030911
    Abstract: Disclosed herein is a method of delineating a second wellbore from a first wellbore. The method includes, emitting acoustic waves from a tool in the first wellbore, receiving acoustic waves at the tool reflected from the second wellbore, and determining orientation and distance of at least a portion of the second wellbore relative to the tool.
    Type: Grant
    Filed: December 3, 2008
    Date of Patent: May 12, 2015
    Assignee: Baker Hughes Incorporated
    Inventors: Xiao Ming Tang, Douglas J. Patterson
  • Patent number: 8944183
    Abstract: The present disclosure is related to apparatuses and methods measuring and processing a characteristic of subsurface earth formations penetrated by a borehole. More specifically this present disclosure relates to a method and apparatus for measuring and processing an acoustic characteristic such as formation shear wave velocity of subsurface sonic waves after these waves traverse earth formations adjoining a borehole or passing through a portion of the subsurface. The apparatus may include: a bottomhole assembly, a drill bit configured to generate an acoustic signal, at least two acoustic detectors, and a processor. The acoustic signal may include a specific multipole signal that may propagate through an earth formation along the borehole. The method may include use of the apparatus, including steps for estimating a shear velocity of the acoustic signal using signals from the at least two acoustic detectors.
    Type: Grant
    Filed: August 4, 2011
    Date of Patent: February 3, 2015
    Assignee: Baker Hughes Incorporated
    Inventors: Theodorus W. Geerits, Douglas J. Patterson
  • Patent number: 8902702
    Abstract: Methods of and apparatus to image one or more subsurface formation features are disclosed. An example method includes generating acoustic waves with a transmitter and receiving the acoustic waves and acoustic data contained therein at one or more receivers. The example method also includes extracting one or more S-S, P-S or S-P reflected waveform data from the acoustic data, estimating a dip of the one or more subsurface formation features, migrating the one or more S-S, P-S or S-P reflected waveform data with the estimated dip and mapping the migrated one or more S-S, P-S or S-P reflected waveform data. In addition, the example method includes identifying one or more permeable subsurface formation features using the mapped migrated one or more S-S, P-S or S-P reflected waveform data.
    Type: Grant
    Filed: April 15, 2011
    Date of Patent: December 2, 2014
    Assignee: Schlumberger Technology Corporation
    Inventors: Nobuyasu Hirabayashi, Kentaro Torii, Hiroaki Yamamoto, Jakob Haldorsen, Arne Voskamp
  • Patent number: 8902701
    Abstract: Example methods, apparatus and articles of manufacture to determine anisotropy indicators for subterranean formations are disclosed. A disclosed example method includes computing a first shear slowness value from measured quadrupole waves, computing a second shear slowness value from measured Stoneley waves, and comparing the first and second shear slowness values to determine an anisotropy indicator representative of anisotropy of a subterranean formation.
    Type: Grant
    Filed: December 9, 2009
    Date of Patent: December 2, 2014
    Assignee: Schlumberger Technology Corporation
    Inventors: Toshihiro Kinoshita, Alain Dumont
  • Patent number: 8862408
    Abstract: In response to at least one input criterion, one or more target positions in an acquisition domain are determined for processing of survey data, where the survey data is acquired by survey equipment in the acquisition domain having a first set of dimensions, and where the processing of the survey data is to be performed in a processing domain having a second set of dimensions different from the first set of dimensions.
    Type: Grant
    Filed: September 28, 2011
    Date of Patent: October 14, 2014
    Assignee: WesternGeco L.L.C.
    Inventors: Massimiliano Vassallo, Dirk-Jan Van Manen, Ralf G. Ferber
  • Patent number: 8848484
    Abstract: Methods and apparatus to filter acoustic waveforms in downhole environments are described. An example method involves receiving acoustic waveform data representing acoustic signals traversing at least a portion of a borehole adjacent a subterranean formation and performing a direct transform operation on the acoustic waveform data to generate wavelet map data. The wavelet map data comprises a time-frequency representation of the acoustic waveform data.
    Type: Grant
    Filed: December 4, 2011
    Date of Patent: September 30, 2014
    Assignee: Schlumberger Technology Corporation
    Inventors: Henri-Pierre Valero, Shinichi Sunaga, Takeshi Endo
  • Patent number: 8813869
    Abstract: Methods and related systems are described for measuring and analyzing refracted acoustic energy. A plurality of receivers mounted are on a downhole tool, and are arranged and adapted to receive refracted acoustic energy from a downhole formation. Measurements of refracted acoustic energy is analyzed such that information relating to an azimuthal direction relative to the downhole tool of an interface within the downhole formation can be estimated. The receivers can be mounted on a drill collar as part of a LWD tool and steering of the drilling trajectory can be based in part on the estimated formation information.
    Type: Grant
    Filed: March 20, 2008
    Date of Patent: August 26, 2014
    Assignee: Schlumberger Technology Corporation
    Inventors: Nicholas Bennett, Jakob Brandt Utne Haldorsen, Hiroaki Yamamoto, Nobuyasu Hirabayasbi, Takeshi Endo, Richard Timothy Coates
  • Patent number: 8797825
    Abstract: A logging system for measuring anisotrophic properties of the materials penetrated by a borehole. A downhole or “logging tool” element of the system comprises a source section that comprises either a unipole or a dipole acoustic source. The receiver section comprises a plurality of receiver stations disposed at different axial spacings from the acoustic source. Each receiver station comprises one or more acoustic receivers. The system requires that the source and receiver sections rotate synchronously as the logging tool is conveyed along the borehole. Receiver responses are measured in a plurality of azimuthal angle segments and processed as a function of rotation angle of the tool. The logging system can be embodied as a logging-while-drilling system, a measurement-while-drilling system, and a wireline system that synchronously rotates source and receiver sections. All embodiments require that the acoustic source operate at a relatively high frequency.
    Type: Grant
    Filed: August 2, 2010
    Date of Patent: August 5, 2014
    Assignee: Precision Energy Services, Inc.
    Inventor: Medhat W. Mickael
  • Patent number: 8797827
    Abstract: Various technologies for a seismic acquisition system, which may include an acquisition central system configured to determine a desired start time for a sweep cycle in one or more vibrators and a recorder source system controller in communication with the acquisition central system. The recorder source system controller may be configured to receive the desired start time from the acquisition central system. The seismic acquisition system may further include one or more vibrator units in communication with the recorder source system controller. Each vibrator unit may be configured to start a sweep cycle in a vibrator at the desired start time.
    Type: Grant
    Filed: December 22, 2010
    Date of Patent: August 5, 2014
    Assignee: WesternGeco L.L.C.
    Inventor: Martin Laycock
  • Publication number: 20140204710
    Abstract: Methods and apparatus for estimating borehole mud slownesses are disclosed. An example method includes estimating a borehole drilling fluid slowness value based on a tube wave modulus value, a tube-wave slowness value, and a drilling fluid density value. The borehole is associated with an anisotropic elastic medium.
    Type: Application
    Filed: January 21, 2013
    Publication date: July 24, 2014
    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventor: SCHLUMBERGER TECHNOLOGY CORPORATION
  • Patent number: 8773948
    Abstract: Methods and apparatus to determine slowness of drilling fluid in an annulus are described. An example method of determining slowness of drilling fluid in an annulus of a borehole in a formation includes obtaining a first slowness of the drilling fluid in the annulus and measuring with a downhole tool slownesses of the formation based on the first slowness. The example method also includes determining a first compressibility of the formation based on the slownesses of the formation and a first density of the formation and calculating a second density and a second compressibility of the drilling fluid in the annulus based on the first density and the first compressibility. The method also includes calculating a second slowness of the drilling fluid in the annulus based on the second density and the second compressibility.
    Type: Grant
    Filed: September 27, 2011
    Date of Patent: July 8, 2014
    Assignee: Schlumberger Technology Corporation
    Inventor: David Linton Johnson
  • Publication number: 20140169131
    Abstract: A method for thermoelastic logging in a borehole of a subterranean formation. The method includes generating, by a computer processor, a reference dispersion based on a borehole wave dispersion measurement of the borehole, wherein the reference dispersion represents far-field elastic properties in the subterranean formation, analyzing, by the computer processor, a difference between the reference dispersion and the borehole wave dispersion measurement based on a thermoelastic model of the subterranean formation to generate an analysis result, and determining, by the computer processor and based on the analysis result, a temperature dependent parameter of the subterranean formation.
    Type: Application
    Filed: December 13, 2012
    Publication date: June 19, 2014
    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventor: SCHLUMBERGER TECHNOLOGY CORPORATION
  • Publication number: 20140169130
    Abstract: Methods and apparatus for waveform processing are disclosed. An example method includes representing waveform data using space time propagators in the Discrete Radon Transform Domain. The method also includes identifying signals within the represented waveform data using a Sparisty Penalized Transform.
    Type: Application
    Filed: December 13, 2012
    Publication date: June 19, 2014
    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Shuchin Aeron, Sandip Bose, Henri-Pierre Valero
  • Patent number: 8755248
    Abstract: An acoustic logging while drilling tool includes a single unipole acoustic transmitter longitudinally and azimuthally spaced apart from a single linear array of unipole acoustic receivers. In certain preferred embodiments, the linear array of unipole receivers is azimuthally spaced apart from the unipole transmitter by about either 90 or 180 degrees. A bipole logging while drilling tool includes two unipole acoustic transmitters and two linear arrays of unipole acoustic receivers.
    Type: Grant
    Filed: May 17, 2010
    Date of Patent: June 17, 2014
    Assignee: Schlumberger Technology Corporation
    Inventor: Tsili Wang
  • Patent number: 8730763
    Abstract: Methods and apparatus to optimize parameters in a downhole environment are described. An example downhole tool includes a transmitter to transmit a signal into a subterranean formation and one or more receivers to receive at least a portion of the acoustic signal. The downhole tool also includes a processor configured to determine slownesses of different acoustic modes at a frequency of the signal received. Each of the slownesses is associated with a first parameter and a second parameter. The different acoustic modes have substantially different sensitivities to at least one of the first parameter or the second parameter. The processor to invert the determined slownesses of the different acoustic modes to determine an optimized value of the first parameter and an optimized value of the second parameter.
    Type: Grant
    Filed: May 9, 2011
    Date of Patent: May 20, 2014
    Assignee: Schlumberger Technology Corporation
    Inventor: David Linton Johnson
  • Publication number: 20140086009
    Abstract: Methods and apparatus for waveform processing are disclosed. An example method includes estimating a theoretical value of a first input parameter and setting a second input parameter to a known value. The known value is different than an actual value of the second input parameter. The method also includes identifying a frequency band using a processor that minimizes an effect of the second input parameter on a shear slowness inversion value.
    Type: Application
    Filed: September 21, 2012
    Publication date: March 27, 2014
    Applicant: Schlumberger Technology Corporation
    Inventor: Shinji Yoneshima
  • Publication number: 20140043938
    Abstract: Cased-hole radial profiling of shear parameters from sonic measurements is disclosed.
    Type: Application
    Filed: August 13, 2012
    Publication date: February 13, 2014
    Inventor: Bikash K. Sinha
  • Publication number: 20140010045
    Abstract: Methods and apparatus for determining slowness of wavefronts. An example apparatus includes one or more sources spaced from a receiver. The one or more sources are to transmit one or more signals and the receiver is to receive at least a portion of the one or more signals. The apparatus includes a processor to process waveform data associated with the one or more signals by stacking waveforms of the waveform data based on to linear moveout and sinusoidal moveout.
    Type: Application
    Filed: July 4, 2012
    Publication date: January 9, 2014
    Inventors: Nicholas N. Bennett, Richard T. Coates, Jakob Brandt Utne Haldorsen, Douglas E. Miller