Borehole Or Casing Condition Patents (Class 367/35)
  • Patent number: 10571584
    Abstract: Systems and methods for estimating orthorhombic anisotropy parameters of subsurface rock layers are provided. An initial three-dimensional (3D) model of layers in a subsurface formation is generated. Particular combinations of seismic source and receiver locations associated with a vertical seismic profile (VSP) survey of the formation are selected based on a simulation of seismic wave propagation through each layer of the initial 3D model. A global inversion is performed using data points selected from travel time data associated with the VSP survey in order to estimate different sets of anisotropy parameters for the layers of the initial 3D model, where the selected data points correspond to the selected source-receiver combinations. The initial 3D model is refined with an optimal set of anisotropy parameters selected from the estimated parameter sets. The refined 3D model is provided for seismic analysis and well planning operations to be performed for the subsurface formation.
    Type: Grant
    Filed: September 18, 2015
    Date of Patent: February 25, 2020
    Assignee: Halliburton Energy Services, Inc.
    Inventor: Amit Padhi
  • Patent number: 10436921
    Abstract: A method can include providing compressional and shear-wave slowness data for a homogeneous, anisotropic formation at deviated borehole angles greater than 40 degrees and less than 90 degrees as defined by a vertical transverse isotropy (VTI) symmetry axis; providing a relationship for normal and tangential compliances (e.g., BN and BT); and, based on the data and the relationship, outputting a model for calculating anisotropy parameter values (e.g., ?0, ?, .?) that characterize the homogeneous, anisotropic formation (e.g., along a borehole angle of 90 degrees). Various other apparatuses, systems, methods, etc., are also disclosed.
    Type: Grant
    Filed: July 26, 2012
    Date of Patent: October 8, 2019
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Steve Allan Horne, John Walsh
  • Patent number: 10422212
    Abstract: A method can include receiving an estimated spatial location of a three-component receiver in a borehole; receiving a plurality of spatial locations of sources of seismic energy; receiving incident angles for the three-component receiver at the estimated spatial location for the plurality of spatial locations of the sources of seismic energy; computing orientations for the three-component receiver based at least in part on the incident angles; minimizing an error function for the orientations; and, based at least in part on the minimizing, determining one or more deviation survey parameter values that specify at least a portion of a trajectory for the borehole.
    Type: Grant
    Filed: July 4, 2016
    Date of Patent: September 24, 2019
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Ali Yawar Sayed, Joel Herve Le Calvez
  • Patent number: 10425261
    Abstract: Certain embodiments disclosed herein include a circuit for generating modulated backscattered sensory data. The circuit includes a sensor configured to produce sensory data in a format of a bitstream; a waveformer configured to generate a waveform signal (m(t)) compliant with a wireless protocol; a backscatter mixer configured to modulate each bit in the bitstream using the waveform signal; and a wakeup trigger configured to trigger the backscatter mixer in response to a reception of a packet from a first wireless device, wherein the modulated backscattered bitstream is being transmitted to a second wireless device.
    Type: Grant
    Filed: May 10, 2018
    Date of Patent: September 24, 2019
    Assignee: Wiliot, LTD.
    Inventors: Dotan Ziv, Yuval Domb
  • Patent number: 10344582
    Abstract: A downhole installation includes a first pipe layer, a second pipe layer about the first pipe layer, an annulus between the first and second pipe layers, and a geological formation outside of the second pipe layer. A method for evaluating the downhole installation includes: exciting a flexural wave in the first pipe layer using an angled acoustic transmitter; receiving third interface echo data using a plurality of angled acoustic receivers at different locations along the longitudinal extent of the pipe layers; generating acoustic resonance across the thickness of the first and second pipe layers by use of full waveform excitation; receiving the acoustic response wave field generated by the full waveform; identifying a suitable component of the acoustic response wave field; determining if the material outside the second pipe layer is fluid or solid; and analyzing the third interface echo data to thereby evaluate material conditions in the annulus.
    Type: Grant
    Filed: December 21, 2015
    Date of Patent: July 9, 2019
    Assignee: STATOIL PETROLEUM AS
    Inventor: Ioan-Alexandru Merciu
  • Patent number: 10274628
    Abstract: A distributed acoustic sensing cable including an optical fiber waveguide configured to provide light signal transmission and an acoustic device coupled to the optical fiber waveguide and configured to provide acoustic signal transmission. The acoustic device includes a polymer composite having reinforced fibers embedded therein. The polymer composite having acoustic waveguides for attenuating undesirable acoustic waves propagating along the distributed acoustic sensing cable and optical fibers embedded within the polymer composite that extend along an axial length of the acoustic device that facilitate the light signal transmission.
    Type: Grant
    Filed: July 31, 2015
    Date of Patent: April 30, 2019
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Hua Xia, Avinash Vinayak Taware, David Andrew Barfoot
  • Patent number: 10156653
    Abstract: A method of determining properties of a wellbore in a formation includes obtaining from the acoustic logging tool, acoustic data comprising an acoustic wave reflected from the casing, the annular fill material, one or more interfaces between any of the mud, the casing, and the annular fill material, or combinations thereof. The method includes normalizing the acoustic wave in a frequency domain, resulting in a specular spectrum and removing spectral noise outside a region of interest in the specular spectrum. The method includes shaping the specular spectrum around a resonance frequency, converting the shaped specular spectrum into a time domain, resulting in a renormalized waveform, and subtracting from the renormalized waveform one or more of a specular noise, second interface echoes, resulting in a third interface echo signal.
    Type: Grant
    Filed: November 10, 2016
    Date of Patent: December 18, 2018
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Mikhail Lemarenko, Christoph Klieber, Thilo Michael Brill
  • Patent number: 9915749
    Abstract: A logging sensor or tool including a structural component, a non-structural component, and a composite disposed between the structural component and the non-structural component. The composite may contain a metallic foam having pores and an elastomeric material deposited in the pores. The elastomeric material may include an elastomer and a plurality of metallic shield particles. A logging system and to a wireline system containing such a logging sensor or tool.
    Type: Grant
    Filed: December 3, 2013
    Date of Patent: March 13, 2018
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Richard Teng Thuan Khoo, Adan Hernandez Herrera
  • Patent number: 9869789
    Abstract: The present disclosure includes a method for monitoring a subsurface formation including disposing an antenna in a horizontal wellbore, the antenna including a plurality of piezoelectric modules. A voltage signal is applied to at least one of the piezoelectric modules to cause the at least one piezoelectric modules to emit seismic energy into the subsurface formation. A resulting signal is received at a receiver. A property of the subsurface formation is determined based, at least in part, on the resulting signal.
    Type: Grant
    Filed: February 23, 2015
    Date of Patent: January 16, 2018
    Assignee: CGG SERVICES SAS
    Inventors: Julien Cotton, François-Xavier Grésillon
  • Patent number: 9714566
    Abstract: Systems, methods, and computer-readable storage devices for determining a location of an acoustic source outside of a borehole. The method relates to indicating a radial distance to the borehole, an offset along the borehole, and an azimuthal position around the borehole, of the acoustic source. The method includes receiving acoustic signals from respective acoustic sensors spaced along a tool lowered within the borehole. Using the acoustic signals and a borehole model, stacked energies are calculated for different radial distances from the borehole. At least one of the stacked energies is translated to an indication of a radial distance of the acoustic source from the borehole. The stacked energy for a radial distance is computed by offsetting the acoustic data signals in time in accordance the borehole model, summing the offset acoustic data signals to produce a stacked signal, and evaluating energy of the stacked signal over a time window.
    Type: Grant
    Filed: July 18, 2014
    Date of Patent: July 25, 2017
    Assignee: Halliburton Energy Services, Inc.
    Inventor: Batakrishna Mandal
  • Patent number: 9678236
    Abstract: Apparatus, systems, and methods may operate to receive radiated energy as scattered energy after the radiated energy interacts with a geologic formation, wherein the scattered energy is received at a sub-surface multi-channel sensor array that operates to transform the scattered energy into received signals, and wherein the radiated energy is provided by a sub-surface source of elastic energy; and to identify discontinuous features in the geologic formation by interferometric comparison of the received signals as elastic signals and/or electromagnetic signals among some sensors in the sensor array, or by time-reversal propagation of the received signals as elastic and/or electromagnetic signals in a numeric model of a volume of the geologic formation. Additional apparatus, systems, and methods are disclosed.
    Type: Grant
    Filed: April 27, 2010
    Date of Patent: June 13, 2017
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Paul F. Rodney, Stewart Arthur Levin
  • Patent number: 9664034
    Abstract: In some embodiments, apparatus and systems, as well as method and articles, may operate to launch acoustic waves along a first acoustic path length from an acoustic transducer toward an axis of rotation, to impinge on a first front surface of a target substantially fixed with respect to the axis, and to receive a reflection of the acoustic waves from the first front surface at the acoustic transducer. After rotating the acoustic transducer about the axis along a substantially circular path, additional activities may include launching acoustic waves along a second acoustic path length, different from the first acoustic path length, from the acoustic transducer toward the axis to impinge on a second front surface of the target, and receiving a reflection of the acoustic waves from the second front surface at the acoustic transducer. Additional apparatus, systems, and methods are disclosed.
    Type: Grant
    Filed: November 30, 2011
    Date of Patent: May 30, 2017
    Assignee: Halliburton Energy Services, Inc.
    Inventor: Batakrishna Mandal
  • Patent number: 9563963
    Abstract: A method of detecting an edge of a geological characteristic in a borehole comprises, in respect of an image log of a length of a borehole, carrying out the steps of a gradient-based edge detection method, a phase congruence-based edge detection method or a combination of such methods as preliminary, pre-processing stages. Subsequent steps of the method may include operating a relatively computationally simple process to identify sinusoids among detected edge features; and a relatively computationally complex process for parameterizing the thus-identified sinusoids.
    Type: Grant
    Filed: May 14, 2013
    Date of Patent: February 7, 2017
    Assignee: Reeves Wireline Technologies Limited
    Inventors: Peter Adrian Spencer Elkington, Said Assous
  • Patent number: 9546548
    Abstract: A distributed acoustic wave detection system and method is provided. The system may include a fiber optic cable deployed in a well and configured to react to pressure changes resulting from a propagating acoustic wave and an optical source configured to launch interrogating pulses into the fiber optic cable. In addition, the system may include a receiver configured to detect coherent Rayleigh noise produced in response to the interrogating pulses. The CRN signal may be used to track the propagation of the acoustic waves in the well. Such capability allows the location of the cement sheath, as well as measuring the bonding of cement to at least a casing string at least partially surrounded by a cement sheath.
    Type: Grant
    Filed: September 19, 2012
    Date of Patent: January 17, 2017
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Arthur H. Hartog, William B. Underhill, Simon Severance, Samantha Rist
  • Patent number: 9529105
    Abstract: Acoustic logging systems and methods are provided with multi-mode inversion for at least vertical shear slowness and shear anisotropy. At least some method embodiments acquire waveforms for multiple acoustic wave modes as a function of tool position in a borehole, derive position-dependent mode dispersion curves from the waveforms, match the derived dispersion curves with parameterized dispersion curves to determine a vertical shear slowness and a shear anisotropy as a function of position, and displaying a borehole log that represents at least one of the vertical shear slowness and the shear anisotropy as a function of position. The objective function employed for the inversion is evaluated across multiple wave propagation modes and mud slownesses and may employ an adaptive, frequency-dependent weighting based on distance between the derived dispersion curves and the parameterized dispersion curves.
    Type: Grant
    Filed: April 2, 2012
    Date of Patent: December 27, 2016
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Mark Vincent Collins, Arthur Cheng
  • Patent number: 9494033
    Abstract: A method and apparatus for detecting a kick in a wellbore using acoustic transducers. In one embodiment, a system for detecting a kick in a wellbore includes a drill string having a plurality of sections of drill pipes and a plurality of kick detection subs disposed between the sections of drill pipes. Each of the kick detection subs includes an acoustic transducer and kick detection circuitry coupled to the acoustic transducer. The kick detection circuitry is configured to detect gas bubbles in the wellbore based on acoustic signals received by the acoustic transducer. The kick detection circuitry is also configured to determine whether a kick is present in the wellbore based on the detected gas bubbles. The kick detection circuitry is further configured to transmit information indicating whether a kick is present to the surface.
    Type: Grant
    Filed: June 22, 2012
    Date of Patent: November 15, 2016
    Assignee: INTELLISERV, LLC
    Inventors: Reza Taherian, Fernando Garcia-Osuna
  • Patent number: 9328606
    Abstract: A method of logging a perforation tunnel and associated features of the perforation tunnel can include the following features. A logging device including an ultrasonic transducer is located downhole into a well. The well has a casing. The ultrasonic transducer has a focal point that is a distance from the ultrasonic transducer so as to be behind the inner face of the casing. An ultrasonic signal is projected from the ultrasonic transducer. A reflection of the ultrasonic signal is reflected from an internal portion of the perforation tunnel, the perforation tunnel extending through the casing and into formation. A transit time is measured between transmission and reception of the ultrasonic signal. A position of the ultrasonic transducer corresponding to the ultrasonic transmission and reception of the reflected signal is determined.
    Type: Grant
    Filed: January 6, 2011
    Date of Patent: May 3, 2016
    Assignee: Schlumberger Technology Corporation
    Inventors: Ralph M. D'Angelo, Harvey Williams
  • Patent number: 9273545
    Abstract: A method of determining properties of a bonding material disposed outside of a casing in a borehole includes at least two of the following three pairs of operations: (1) inducing an acoustic wave in the casing, and measuring attenuation of the acoustic wave, by pulse-echo or other cement bond logging measurement; (2) inducing an SH wave in the casing, and measuring attenuation of the SH wave; and (3) inducing a Lamb wave in the casing, and measuring attenuation of the Lamb wave. (2) and/or (3) may be performed by an electromagnetic acoustic transducer. The method further includes determining the shear velocity or shear impedance and the compressional velocity or compressional impedance of the bonding material based on appropriate ones of the measurements. The bonding material may be cement.
    Type: Grant
    Filed: December 23, 2012
    Date of Patent: March 1, 2016
    Assignee: Baker Hughes Incorporated
    Inventors: Alexei Bolshakov, Douglas Patterson, Edward Domangue
  • Patent number: 9274240
    Abstract: A cement bond logging method for wells containing heavy mud and cement is provided. Acoustic logging tool data from a well having material in the annular space between the casing and the formation is analyzed to map relationships between waveform amplitude, acoustic impedance, and impedance derivative of the material. Map zones representing fully bonded well regions and partially bonded well regions are identified. An image is generated from the log data corresponding to the identified map zones. A cement bond logging system including a memory having cement bond logging software and a processor coupled to the memory to execute the software is also provided.
    Type: Grant
    Filed: August 23, 2011
    Date of Patent: March 1, 2016
    Assignee: HALLIBURTON ENERGY SERVICES, INC.
    Inventor: Gary J. Frisch
  • Patent number: 9157312
    Abstract: Casing signals generated by an EMAT in a borehole are processed using at least two orthogonal band-limited filters. The band-limited filters may include Gaussian or Cauchy Wavelet filters. By using the Hilbert transform, an envelope of the filtered signals is determined and amplitudes and arrival times of individual arrivals are estimated. These can be used to estimate casing and cement properties.
    Type: Grant
    Filed: November 10, 2011
    Date of Patent: October 13, 2015
    Assignee: BAKER HUGHES INCORPORATED
    Inventor: Jinsong Zhao
  • Patent number: 9158021
    Abstract: A method for determining a volume of a fracture network includes detecting seismic signals deployed over an area of the subsurface during pumping of fracturing fluid into at least one wellbore drilled through the area. A hypocenter of each fracture induced by the pumping is determined using the seismic signals. A facture network and associated fracture volume is determined using the determined hypocenters and seismic moments determined from the detected seismic signals. A maximum value of a scaling factor is determined based on a subset of the hypocenters having a highest cumulative seismic moments. The scaling factor is determined by relating a pumped volume of the fracturing fluid with respect to the determined fracture volume. Dimensions of each fracture are scaled using the maximum value of the scaling factor. The fracture volumes are recalculated using the scaled dimensions.
    Type: Grant
    Filed: February 1, 2013
    Date of Patent: October 13, 2015
    Assignee: Microseismic, Inc.
    Inventor: Jonathan P. McKenna
  • Patent number: 9103196
    Abstract: The present disclosure is related to apparatuses and methods for estimating borehole parameters using a plurality of reflections caused by a plurality of acoustic pulses. The reflections may overlap each other and/or the acoustic pulses. The methods may include estimating an envelope of the received acoustic signal at the at least one element of the array of transducers; and estimating at least one arrival time of at least one of the plurality of overlapping events from the envelope of the received acoustic signals, the arrival times being characteristic of the geometry of the borehole. The method may also include imaging the borehole wall. The apparatus may include an array of transducers on a rotatable transducer assembly with at least one element on the array configured to generate a plurality of acoustic pulses and receive reflections and a processor configured to perform the method.
    Type: Grant
    Filed: August 1, 2011
    Date of Patent: August 11, 2015
    Assignee: BAKER HUGHES INCORPORATED
    Inventors: Jinsong Zhao, James V. Leggett, III
  • Patent number: 9086348
    Abstract: A method, system and apparatus for testing properties of a rock formation surrounding a wellbore in situ. The apparatus includes a tool body, one or more indenters, and one or more acoustic sensors. The body includes an outer surface that defines one or more cavities therein. Each cavity extends into the body. Each indenter is positioned within a corresponding cavity and is positionable into an operating position and a non-operating position. The acoustic sensor is positioned within the cavity and adjacent to the indenter. The indenter is positioned at least partially beyond the outer surface when in the operating position. The acoustic sensor senses one or more acoustic events occurring when the indenter is in the operating position. The apparatus is inserted into the wellbore. Once inserted, the indenter applies a load onto the rock formation causing cracking and the sensor receives the generated acoustic transmissions. The transmissions are analyzed.
    Type: Grant
    Filed: July 29, 2011
    Date of Patent: July 21, 2015
    Assignee: VAREL EUROPE S.A.S.
    Inventors: Gary M. Thigpen, Federico Bellin, Alfazazi Dourfaye, William W. King
  • Patent number: 9036449
    Abstract: Methods and systems for acoustically determining reservoir parameters of subterranean formations. A tool comprising at least one seismic source or seismic receiver mounted thereon; a conveyance configured for movement of the acoustic tool in a borehole traversing the subterranean formations; and a source retainer configured or designed for permanent deployment in the borehole to removably retain the acoustic tool in the borehole. The source retainer when deployed provides acoustic coupling with the borehole and removably retains the acoustic tool in the borehole so that, over multiple deployments, the acoustic tool is repeatedly deployed at the same predetermined location and orientation relative to the subterranean formation, and with the same acoustic coupling to the borehole.
    Type: Grant
    Filed: July 31, 2013
    Date of Patent: May 19, 2015
    Assignee: Schlumberger Technology Corporation
    Inventors: Masahiro Kamata, Tsunehisa Kimura
  • Patent number: 9013955
    Abstract: Signals from an acoustic transducer used in a borehole include overlapping, ringing reflections from the casing walls, voids in the cement and the formation. By using the Hilbert transform, an envelope of the signals is determined and individual echoes are detected by using a Gauss-Laplace operator.
    Type: Grant
    Filed: November 10, 2008
    Date of Patent: April 21, 2015
    Assignee: Baker Hughes Incorporated
    Inventor: Jinsong Zhao
  • Patent number: 8964503
    Abstract: Formation evaluation measurements are used to estimate formation lithology. The estimated lithology is used to provide an estimate of acoustic wave slowness. The estimated acoustic wave slowness is used to provide processing parameters for acoustic data that are less sensitive to noise.
    Type: Grant
    Filed: April 26, 2010
    Date of Patent: February 24, 2015
    Assignee: Baker Hughes Incorporated
    Inventors: Michael J. Manning, Luis Jordan Andonof, Terrence H. Quinn
  • Patent number: 8964504
    Abstract: A method of evaluating a cased borehole in an earth formation includes: emitting at least one acoustic signal into the borehole via an acoustic source and detecting a return acoustic signal via an acoustic sensor, the borehole including a casing and a casing support material disposed between the casing and a borehole wall; emitting a neutron flux via a neutron source into the borehole and detecting a radiation signal via a radiation detector, the radiation signal including induced gamma radiation resulting from neutron interactions; and identifying a casing support material characteristic based on the return acoustic signal and the radiation signal.
    Type: Grant
    Filed: April 4, 2011
    Date of Patent: February 24, 2015
    Assignee: Baker Hughes Incorporated
    Inventors: David M. Chace, Rafay Z. Ansari, Elton Frost, Jr.
  • Publication number: 20150049585
    Abstract: Acoustic logging systems and methods are provided with multi-mode inversion for at least vertical shear slowness and shear anisotropy. At least some method embodiments acquire waveforms for multiple acoustic wave modes as a function of tool position in a borehole, derive position-dependent mode dispersion curves from the waveforms, match the derived dispersion curves with parameterized dispersion curves to determine a vertical shear slowness and a shear anisotropy as a function of position, and displaying a borehole log that represents at least one of the vertical shear slowness and the shear anisotropy as a function of position. The objective function employed for the inversion is evaluated across multiple wave propagation modes and mud slownesses and may employ an adaptive, frequency-dependent weighting based on distance between the derived dispersion curves and the parameterized dispersion curves.
    Type: Application
    Filed: April 2, 2012
    Publication date: February 19, 2015
    Applicant: HALLIBURTON ENERGY SERVICES, INC.
    Inventors: Mark Vincent Collins, Arthur Cheng
  • Publication number: 20150029823
    Abstract: Systems and methods for identifying sanding in production wells using time-lapse sonic data. Formation anisotropy can be characterized in terms of shear moduli in a vertical wellbore, e.g., vertical shear moduli C44 and C55 in the wellbore axial planes and horizontal shear modulus C66 in the wellbore cross-sectional plane. Changes in formation anisotropy between different times can provide qualitative indicators of the occurrence of sanding in the production well. Before production begins, the horizontal shear modulus C66 is typically less than the vertical shear modulus C44 or C55 or both. At a subsequent time after sanding occurs, the horizontal shear modulus C66 is typically greater than the vertical shear modulus C44 or C55 or both. By comparing the shear moduli of the vertical wellbore at different times, it is possible to identify the occurrence of sanding in the production well using time-lapse sonic data.
    Type: Application
    Filed: July 23, 2013
    Publication date: January 29, 2015
    Applicant: Schlumberger Technology Corporation
    Inventors: Jiaqi Yang, Bikash K. Sinha, Ting Lei
  • Patent number: 8928488
    Abstract: In some embodiments, an apparatus and a system, as well as a method and an article, may operate to monitor a first condition associated with transmitting or receiving a signal in a formation or on a drill string, or both, over a first selected interval of a drill string located down hole; to monitor a second condition associated with transmitting or receiving the signal in the formation or on the drill string or both, over a second selected interval of the drill string; to compare the first condition to the second condition to provide a comparison result; and based on the comparison result, to select one of the first selected interval or the second selected interval to transmit or receive the signal in the formation or on the drill string, or both. Additional apparatus, systems, and methods are disclosed.
    Type: Grant
    Filed: October 20, 2009
    Date of Patent: January 6, 2015
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Paul F. Rodney, Clive D. Menezes
  • Patent number: 8913461
    Abstract: Measurements made by a transducer assembly for downhole imaging are affected by reverberations between the transducer and the window on the outside of the assembly. The reverberations result in a stationary noise on the image. Hardware solutions to improve signal-to-noise ratio includes using a composite transducer, adjusting the distance between the transducer and the window. SNR can also be improved by processing techniques that include stacking, fitting a sinusoid to the reverberation, by envelope peak detection, and by applying a notch filter.
    Type: Grant
    Filed: December 17, 2013
    Date of Patent: December 16, 2014
    Assignee: Baker Hughes Incorporated
    Inventors: Roger R. Steinsiek, Jason M. Harris, Jinsong Zhao, Douglas J. Patterson, James B. Domnanish
  • Patent number: 8902704
    Abstract: In a method for logging the location of a fluid depth in a wellbore, an acoustic event is allowed to take place in a specific manner at the ground surface. This acoustic event generates pressure waves. The pressure waves travel in the wellbore downward. The pressure waves traveling in the wellbore are reflected at least also at the fluid depth. At the ground surface, the pressure waves traveling there out of the wellbore are picked up and the time of travel since the acoustic event is measured. The picked-up and measured pressure waves are analyzed and, together with the associated time of travel, the location of the fluid depth is deduced. The acoustic event generates a signal pattern having a predetermined, time-variable frequency spectrum. The signal pattern is emitted as vibration event into the wellbore, travels downward, and is reflected. At the ground surface, the picked-up signals originating from the wellbore are analyzed.
    Type: Grant
    Filed: March 22, 2010
    Date of Patent: December 2, 2014
    Assignee: Rohol-Aufsuchungs AG
    Inventors: Rainer Zamow, Kurt Sonnleitner
  • Publication number: 20140347957
    Abstract: A method of detecting seismic waves traveling through a subsurface formation includes lowering a cable into a borehole in the subsurface formation, the cable having at least one optical fiber associated therewith, and causing descent of a remote end of the cable to be arrested. The method further includes feeding a further length of the cable into the borehole such that the cable is slack and in contact with at least part of a wall of the borehole, and using an interrogator coupled to the at least one optical fiber to detect seismic waves traveling through the subsurface formation and into the cable.
    Type: Application
    Filed: May 22, 2013
    Publication date: November 27, 2014
    Applicant: Schlumberger Technology Corporation
    Inventors: Arthur H. Hartog, Bernard Frignet, Duncan Mackie, Michael Clark
  • Publication number: 20140321240
    Abstract: A method for examining integrity of cement in a wellbore includes deploying an ultrasound transducer within a wellbore. One or more reference ultrasound images of the cement within the wellbore are acquired. A pushing pulse is emitted from the ultrasound transducer to elicit a displacement of the cement within the wellbore. A sequence of ultrasound images is acquired, over time, depicting the displacement of the cement within the wellbore elicited by the pushing pulse. A strain tensor map is generated from a difference between the one or more reference ultrasound images and the acquired sequence of ultrasound images. A degree of integrity of the cement within the wellbore is determined based on the generated strain tensor map.
    Type: Application
    Filed: April 26, 2013
    Publication date: October 30, 2014
    Applicants: SIEMENS MEDICAL SOLUTIONS USA, INC., SIEMENS CORPORATION
    Inventors: Stephen R. Barnes, Thomas O'Donnell
  • Publication number: 20140301164
    Abstract: In some embodiments, apparatus and systems, as well as method and articles, may operate to launch acoustic waves along a first acoustic path length from an acoustic transducer toward an axis of rotation, to impinge on a first front surface of a target substantially fixed with respect to the axis, and to receive a reflection of the acoustic waves from the first front surface at the acoustic transducer. After rotating the acoustic transducer about the axis along a substantially circular path, additional activities may include launching acoustic waves along a second acoustic path length, different from the first acoustic path length, from the acoustic transducer toward the axis to impinge on a second front surface of the target, and receiving a reflection of the acoustic waves from the second front surface at the acoustic transducer. Additional apparatus, systems, and methods are disclosed.
    Type: Application
    Filed: November 30, 2011
    Publication date: October 9, 2014
    Applicant: Halliburton Energy Services, Inc.
    Inventor: Batakrishna Mandal
  • Patent number: 8848485
    Abstract: Methods and apparatus for performing sonic well logging within a wellbore based on optical Distributed Acoustic Sensing (DAS) are provided. A sonic well logging system based on DAS may be capable of producing the functional equivalent of tens, hundreds, or even thousands of acoustic sensors. In this manner, the emplacement of the sonic well logging system based on DAS may not be nearly as complex or expensive as emplacing a sonic well logging system based on traditional methods. Furthermore, multiplexing may be simpler, downhole electronics need not be used, and the sonic well logging system may be used in extreme, high temperature environments.
    Type: Grant
    Filed: May 12, 2011
    Date of Patent: September 30, 2014
    Assignee: Weatherford/Lamb, Inc.
    Inventor: Francis X. Bostick, III
  • Publication number: 20140269165
    Abstract: An acoustic logging tool emits a wideband acoustic pulse toward an inside surface of a borehole casing and an acoustic response is received. The acoustic response is analyzed at one or more higher order harmonics of the thickness mode resonance of the casing to determine the acoustic impedance of the material behind the casing.
    Type: Application
    Filed: May 27, 2014
    Publication date: September 18, 2014
    Applicant: Schlumberger Technology Corporation
    Inventors: Benoit Froelich, Andrew J. Hayman, Kenneth K Liang
  • Patent number: 8830787
    Abstract: Disclosed is a method for estimating a property of an earth formation penetrated by a borehole. The method includes: transmitting acoustic waves into the formation from an acoustic source disposed in the borehole and away from a wall of the borehole; generating radial acoustic eigenwaves within a space between the wall of the borehole and the acoustic source using the transmitted acoustic waves; receiving an acoustic signal with an acoustic receiver disposed at the wall of the borehole; sensing an electric field signal with an electric field sensor disposed at the wall of the borehole; and estimating the property using the received acoustic signal and the sensed electric field signal.
    Type: Grant
    Filed: August 31, 2011
    Date of Patent: September 9, 2014
    Assignee: Baker Hughes Incorporated
    Inventors: Vitaly N. Dorovsky, Alexander I. Fedorov
  • Patent number: 8824240
    Abstract: An ultrasonic scanner tool employs a transducer that excites a target plate at a known distance from the transducer. One side of the target plate forms a chamber that in operation is filled with wellbore fluid. On the other side of the target plate, a chamber is formed containing a vacuum or a fluid with a significantly lower acoustic impedance than the wellbore fluid and the target plate, allowing an improved measurement of the acoustic impedance of the wellbore fluid.
    Type: Grant
    Filed: September 7, 2011
    Date of Patent: September 2, 2014
    Assignee: Weatherford/Lamb, Inc.
    Inventors: Edwin K. Roberts, Lucio Nelson Tello
  • Patent number: 8792307
    Abstract: The disclosure, in one aspect, provides an apparatus that includes an acoustic transducer and a backing in contact with a side of the transducer. The backing includes substantially unidirectional fibers in a matrix of a material that has high shear wave acoustic attenuation. The fibers contact the side of the transducer at an angle configured to convert substantially all of the compressional waves that enter the backing for the transducer into shear waves, which shear waves are then attenuated by the matrix of the backing material.
    Type: Grant
    Filed: February 18, 2011
    Date of Patent: July 29, 2014
    Assignee: Baker Hughes Incorporated
    Inventor: Rocco DiFoggio
  • Publication number: 20140192619
    Abstract: A method for torsional wave logging in a borehole of a subterranean formation. The method includes obtaining a torsional wave measurement of the borehole, wherein the torsional wave measurement represents characteristics of a torsional wave propagating within a cylindrical layered structure associated with the borehole, wherein the cylindrical layered structure comprises the subterranean formation and a completion of the borehole, analyzing, by a computer processor, the torsional wave measurement to generate a quality measure of the completion, and displaying the quality measure of the completion.
    Type: Application
    Filed: January 4, 2013
    Publication date: July 10, 2014
    Inventors: BIKESH K. SINHA, SANDIP BOSE, JIAQI YANG, TING LEI, TAREK M. HABASHY, SMAINE ZEROUG, MA LUO
  • Patent number: 8767506
    Abstract: An acoustic logging tool emits a wideband acoustic pulse toward an inside surface of a borehole casing and an acoustic response is received. The acoustic response is analyzed at one or more higher order harmonics of the thickness mode resonance of the casing to determine the acoustic impedance of the material behind the casing.
    Type: Grant
    Filed: December 20, 2011
    Date of Patent: July 1, 2014
    Assignee: Schlumberger Technology Corporation
    Inventors: Benoit Froelich, Andrew J. Hayman, Kenneth K. Liang
  • Publication number: 20140177389
    Abstract: A method of determining properties of a bonding material disposed outside of a casing in a borehole includes at least two of the following three pairs of operations: (1) inducing an acoustic wave in the casing, and measuring attenuation of the acoustic wave, by pulse-echo or other cement bond logging measurement; (2) inducing an SH wave in the casing, and measuring attenuation of the SH wave; and (3) inducing a Lamb wave in the casing, and measuring attenuation of the Lamb wave. (2) and/or (3) may be performed by an electromagnetic acoustic transducer. The method further includes determining the shear velocity or shear impedance and the compressional velocity or compressional impedance of the bonding material based on appropriate ones of the measurements. The bonding material may be cement.
    Type: Application
    Filed: December 23, 2012
    Publication date: June 26, 2014
    Applicant: Baker Hughes Incorporated
    Inventors: Alexei Bolshakov, Douglas Patterson, Edward Domangue
  • Publication number: 20140177388
    Abstract: An apparatus for acoustic imaging includes an array with a number of acoustic transducers. Each acoustic transducer transmits and receives acoustic signals. The apparatus also includes a control unit that is coupled to the array and selectively powers a number of acoustic transducers based upon standoff distance between the array and an object-of-interest (e.g., a borehole wall). In some embodiments, the control unit also varies the frequency of acoustic signals transmitted from the array using the standoff distance between the array and the object-of-interest.
    Type: Application
    Filed: December 20, 2012
    Publication date: June 26, 2014
    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventor: RALPH M. D'ANGELO
  • Publication number: 20140160890
    Abstract: A system and method for determining shear wave anisotropy in a vertically transversely isotropic formation is disclosed. The method includes generating a broad band Stoneley wave and a broad band dipole flexural wave. The broad band Stoneley wave and a broad band dipole flexural wave may be generated at a logging tool located within a wellbore. The method also includes receiving at the logging tool first data corresponding to the broad band Stoneley wave and second data corresponding to the broad band dipole flexural wave. The method also includes determining a vertical shear wave constant, c66, by at least applying an inversion algorithm to the first data and the second data.
    Type: Application
    Filed: August 5, 2011
    Publication date: June 12, 2014
    Inventors: Xinding Fang, Chung Chang, Arthur Chuen Hon Cheng
  • Publication number: 20140160889
    Abstract: An apparatus for evaluating the possibility of casing failure in a borehole measures azimuthal changes in a property responsive to azimuthal changes in axial stress. The measurements may be of acoustic velocity, magnetic permeability, and Barkhausen noise.
    Type: Application
    Filed: August 29, 2013
    Publication date: June 12, 2014
    Applicant: Baker Hughes Incorporated
    Inventor: Joseph Gregory Barolak
  • 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: 20140126325
    Abstract: Embodiments of the present invention help in the processing and interpretation of seismic survey data, by correlating or otherwise comparing or associating seismic data obtained from a seismic survey with flow information obtained from a well or borehole in the surveyed area. In particular, embodiments of the present invention allow for flow data representing a flow profile along a well that is being monitored by a distributed acoustic sensor to be determined, such that regions of higher flow in the well can be determined. For example, in the production zone the well will be perforated to allow oil to enter the well, but it has not previously been possible to determine accurately where in the production zone the oil is entering the well. However, by determining a flow rate profile along the well using the i)AS then this provides information as to where in the perforated production zone oil is entering the well, and hence the location of oil bearing sands.
    Type: Application
    Filed: November 4, 2013
    Publication date: May 8, 2014
    Applicant: SILIXA LTD.
    Inventors: Mahmoud Farhadiroushan, Tom Parker, Daniel Finfer
  • Patent number: 8681582
    Abstract: A method for estimating formation porosity and lithology on a real time basis during a logging while drilling operation using measured values of formation attenuation attributes for compression and/or shear.
    Type: Grant
    Filed: December 27, 2007
    Date of Patent: March 25, 2014
    Assignee: Schlumberger Technology Corporation
    Inventors: Peter T. Wu, Alain Dumont, Pierre Campanac
  • Patent number: 8681583
    Abstract: A method for evaluating fractures induced in subsurface formations includes determining hypocenters and origin times of induced seismic events from seismic signals detected by seismic sensors deployed above a volume of the subsurface formations to be evaluated and recording the detected signals for a selected time. A modified Gutenberg-Richter exponent is determined for each induced seismic event having at least a selected number of other induced seismic events within a selected radial distance thereof. A spatial distribution of the modified Gutenberg-Richter exponents is used to determine at least one property of the induced fractures.
    Type: Grant
    Filed: August 17, 2011
    Date of Patent: March 25, 2014
    Assignee: Microseismic, Inc.
    Inventor: Michael D Kratz