Patents by Inventor Ahmet Kemal Ozdemir

Ahmet Kemal Ozdemir has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20200158901
    Abstract: Various implementations directed to quality control and preconditioning of seismic data are provided. In one implementation, a method may include receiving particle motion data from particle motion sensors disposed on seismic streamers. The method may also include performing quality control (QC) processing on the particle motion data. The method may further include performing preconditioning processing on the QC-processed particle motion data. The method may additionally include attenuating noise in the preconditioning-processed particle motion data.
    Type: Application
    Filed: January 27, 2020
    Publication date: May 21, 2020
    Inventors: Ahmet KEMAL Ozdemir, Bent Andreas Kjellesvig
  • Patent number: 10578759
    Abstract: Various implementations directed to quality control and preconditioning of seismic data are provided. In one implementation, a method may include receiving particle motion data from particle motion sensors disposed on seismic streamers. The method may also include performing quality control (QC) processing on the particle motion data. The method may further include performing preconditioning processing on the QC-processed particle motion data. The method may additionally include attenuating noise in the preconditioning-processed particle motion data.
    Type: Grant
    Filed: February 10, 2015
    Date of Patent: March 3, 2020
    Assignee: WESTERNGECO L.L.C.
    Inventors: Ahmet Kemal Ozdemir, Bent Andreas Kjellesvig
  • Patent number: 10545252
    Abstract: A technique includes receiving seismic data indicative of measurements acquired by seismic sensors. The measurements are associated with a measurement noise. The technique includes estimating at least one characteristic of the measurement noise and deghosting the seismic data based at least in part on the estimated characteristic(s) of the measurement noise.
    Type: Grant
    Filed: January 15, 2010
    Date of Patent: January 28, 2020
    Assignee: WESTERNGECO L.L.C.
    Inventors: Ahmet Kemal Ozdemir, Philippe Caprioli, Ali Ozbek, Dirk-Jan Van Manen, Massimiliano Vassallo
  • Patent number: 10509139
    Abstract: A technique includes using a filter having filtering parameters based at least in part on a dispersion curve of at least one vibration mode of a streamer to filter a measurement acquired by at least one sensor of the streamer and using results of the filtering to suppress vibration noise present in the measurement.
    Type: Grant
    Filed: March 19, 2013
    Date of Patent: December 17, 2019
    Assignee: WESTERNGECO L.L.C.
    Inventors: Ahmet Kemal Ozdemir, Bent Andreas Kjellesvig
  • Patent number: 10353100
    Abstract: A technique includes receiving first data acquired by at least a particle motion gradient sensor or a rotation sensor of a streamer that is subject to vibration due to towing of the streamer; and receiving second data acquired by at least one particle motion sensor of the streamer and being indicative of particle motion and vibration noise. The technique includes processing the second data in a processor-based machine to, based at least in part on the first data, attenuate the vibration noise indicated by the second data to generate third data indicative of the particle motion.
    Type: Grant
    Filed: March 21, 2013
    Date of Patent: July 16, 2019
    Assignee: WESTERNGECO L.L.C.
    Inventors: Nicolas Goujon, Johan O. A. Robertsson, Ahmet Kemal Ozdemir
  • Patent number: 10353098
    Abstract: A technique includes spatially filtering a signal that is derived from a seismic acquisition. The filtering is associated with a filter length, and the filtering includes varying the filter length with frequency. The filtering may be used in connection with adaptive noise attenuation, which is applied to decomposed subbands. Furthermore, the filtering may be applied during the reconstruction of the signal from the subbands.
    Type: Grant
    Filed: June 19, 2014
    Date of Patent: July 16, 2019
    Assignee: WESTERNGECO L.L.C.
    Inventors: James Edward Martin, Ahmet Kemal Özdemir, Bent Andreas Kjellesvig, Ali Ozbek
  • Publication number: 20190101662
    Abstract: Embodiments included herein are directed towards a marine seismic streamer. The seismic streamer may include an outer skin formed in a longitudinally extending tubular shape, an inner surface of the outer skin defining an internal volume containing a gel substance. The seismic streamer may also include a plurality of micro-electro-mechanical (“MEMS”) sensors and a plurality of hydrophones associated with the outer skin, wherein the plurality of MEMS sensors are spaced non-uniformly in the seismic streamer along an axial direction of the streamer, such that not more than 100 MEMS sensors are located in the seismic streamer over a continuous 100 meter axial length of seismic streamer. The seismic streamer may further include an electronics system extending axially through an inside portion of the outer skin and a strength member core extending axially through an inside portion of the outer skin.
    Type: Application
    Filed: October 3, 2018
    Publication date: April 4, 2019
    Inventors: Ahmet Kemal Ozdemir, Jon-Fredrik Hopperstad
  • Publication number: 20190101661
    Abstract: Embodiments included herein are directed towards a marine seismic streamer. The seismic streamer may include an outer skin formed in a longitudinally extending tubular shape, an inner surface of the outer skin defining an internal volume containing a gel substance. The seismic streamer may also include a plurality of micro-electro-mechanical (“MEMS”) sensors and a plurality of hydrophones associated with the outer skin, wherein the plurality of MEMS sensors are spaced non-uniformly in the seismic streamer along an axial direction of the streamer, such that not more than 100 MEMS sensors are located in the seismic streamer over a continuous 100 meter axial length of seismic streamer. The seismic streamer may further include an electronics system extending axially through an inside portion of the outer skin and a strength member core extending axially through an inside portion of the outer skin.
    Type: Application
    Filed: October 4, 2018
    Publication date: April 4, 2019
    Inventors: Ahmet Kemal Ozdemir, Jon-Fredrik Hopperstad
  • Patent number: 10031247
    Abstract: A technique includes receiving data indicative of a first measurement acquired by a rotation sensor on a seismic streamer and based on the first measurement, estimating a torque noise present in a measurement acquired by a second sensor on the streamer. The technique includes attenuating the torque noise based on the estimate.
    Type: Grant
    Filed: February 11, 2009
    Date of Patent: July 24, 2018
    Assignee: WESTERNGECO L.L.C.
    Inventors: Ahmet Kemal Ozdemir, Vidar Anders Husom, Nicolas Goujon, Oeyvind Teigen, Lars Borgen
  • Publication number: 20160356906
    Abstract: Various implementations directed to quality control and preconditioning of seismic data are provided. In one implementation, a method may include receiving particle motion data from particle motion sensors disposed on seismic streamers. The method may also include performing quality control (QC) processing on the particle motion data. The method may further include performing preconditioning processing on the QC-processed particle motion data. The method may additionally include attenuating noise in the preconditioning-processed particle motion data.
    Type: Application
    Filed: February 10, 2015
    Publication date: December 8, 2016
    Inventors: Ahmet Kemal Ozdemir, Bent Andreas Kjellesvig
  • Patent number: 9513393
    Abstract: A technique includes distributing particle motion sensors along the length of a seismic streamer. Each particle motion sensor is eccentrically disposed at an associated angle about an axis of the seismic streamer with respect to a reference line that is common to the associated angles. The sensors are mounted to suppress torque noise in measurements that are acquired by the particle motion sensors. This mounting includes substantially varying the associated angles.
    Type: Grant
    Filed: August 26, 2013
    Date of Patent: December 6, 2016
    Assignee: WESTERNGECO L.L.C.
    Inventors: Ahmet Kemal Ozdemir, Oeyvind Teigen, Lars Borgen
  • Patent number: 9310502
    Abstract: There is provided a method of interpolating wave signals, particularly seismic signals acquired through a seismic survey, using the steps of obtaining time series of measured wave signals; and selecting iteratively basis functions to represent said measured signals with a basis function being fully defined by n parameters, wherein in each iteration one or more basis functions are combined with the selected basis functions such that the residual between the measured signals and a representation of the measured signal by the combined basis functions is minimized at the locations of the measurement at each iteration.
    Type: Grant
    Filed: June 6, 2008
    Date of Patent: April 12, 2016
    Assignee: WesternGeco L.L.C.
    Inventors: Ahmet Kemal Ozdemir, Ali Ozbek
  • Patent number: 9279899
    Abstract: A technique includes estimating propagation parameters that are associated with a towed seismic survey based at least in part on seismic signal measurements and noise measurements.
    Type: Grant
    Filed: July 18, 2007
    Date of Patent: March 8, 2016
    Assignee: WesternGeco L.L.C.
    Inventors: Ahmet Kemal Ozdemir, Philippe Caprioli, Ali Ozbek, Johan Olof Anders Robertsson
  • Patent number: 9229128
    Abstract: A computer-implemented method includes accessing a set of multicomponent marine noise data exhibiting a plurality of polarization vectors at each of a plurality of co-located pressure and particle motion data points on a marine seismic survey apparatus; and determining a set of perturbation noise data for the marine seismic survey apparatus from the polarization vectors. Computer readable program storage media are encoded with instructions that, when executed by a processor, perform the computer-implemented method. A computing apparatus is programmed to perform the computer-implemented method.
    Type: Grant
    Filed: August 17, 2008
    Date of Patent: January 5, 2016
    Assignee: WesternGeco L.L.C.
    Inventors: Ahmet Kemal Ozdemir, Nicolas Goujon, Lars Borgen
  • Patent number: 9217805
    Abstract: A technique includes acquiring particle motion data from a plurality of particle motion sensors while in tow during a seismic survey. During the seismic survey, the particle motion data are processed without deghosting the particle motion data to determine whether at least some portion of the particle motion data is inadequate for an application that relies on the particle motion data.
    Type: Grant
    Filed: October 1, 2010
    Date of Patent: December 22, 2015
    Assignee: WesternGeco L.L.C.
    Inventors: Kenneth E. Welker, Ahmet Kemal Ozdemir, Espen Gulbransen
  • Patent number: 9182512
    Abstract: A technique includes receiving first data indicative of a pressure measurement and measurements of components of a particle motion vector acquired by sensors disposed on at least one cable; and processing the first data to generate second data indicative of a constructed an in-line component of the particle motion vector. The technique includes processing the first and second data in a geophysical processing operation that relies on at least three components of the particle motion vector.
    Type: Grant
    Filed: October 26, 2011
    Date of Patent: November 10, 2015
    Assignee: WESTERNGECO L.L.C.
    Inventors: Nicolas Goujon, Ahmet Kemal Ozdemir, Oeyvind Teigen, Johan O. A. Robertsson
  • Patent number: 9128206
    Abstract: A technique includes decomposing a signal that is derived from a seismic acquisition into a plurality of signals such that each signal is associated with a different frequency band. For each signal of the plurality of signals, the technique includes performing the following: decomposing the signal into subbands in successive stages, where the subbands are associated with at least different frequency ranges of the signal; selectively applying adaptive noise attenuation in between the successive stages such that the stages decompose noise-attenuated subbands; and reconstructing the signal from the subbands resulting from the decomposition. The technique includes combining the reconstructed signals.
    Type: Grant
    Filed: December 23, 2010
    Date of Patent: September 8, 2015
    Assignee: WESTERNGECO L.L.C.
    Inventors: Ahmet Kemal Ozdemir, Bent Andreas Kjellesvig
  • Publication number: 20150241588
    Abstract: Measurement data acquired by at least one sensor in a cable structure towed through a body of water is received. A torsional vibration noise component in the measurement data is estimated. The torsional vibration noise component is used to estimate a rotation angle of the at least one survey sensor with respect to a reference coordinate system of the cable structure.
    Type: Application
    Filed: May 13, 2015
    Publication date: August 27, 2015
    Inventors: Ahmet Kemal Ozdemir, Nicolas Goujon, Oeyvind Teigen, Kenneth E. Welker
  • Patent number: 9052412
    Abstract: Measurement data acquired by at least one sensor in a cable structure towed through a body of water is received. A torsional vibration noise component in the measurement data is estimated. The torsional vibration noise component is used to estimate a rotation angle of the at least one survey sensor with respect to a reference coordinate system of the cable structure.
    Type: Grant
    Filed: July 29, 2011
    Date of Patent: June 9, 2015
    Assignee: WESTERNGECO L.L.C.
    Inventors: Ahmet Kemal Ozdemir, Nicolas Goujon, Oeyvind Teigen, Kenneth E. Welker
  • Patent number: 9030910
    Abstract: A technique includes representing actual measurements of a seismic wavefield as combinations of an upgoing component of the seismic wavefield and ghost operators. Interpolated and deghosted components of the seismic wavefield are jointly determined based at least in part on the actual measurements and the representation.
    Type: Grant
    Filed: September 15, 2010
    Date of Patent: May 12, 2015
    Assignee: Westerngeco L.L.C.
    Inventors: Ali Ozbek, Ahmet Kemal Ozdemir, Massimiliano Vassallo