Patents by Inventor Tilman Kluver

Tilman Kluver 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: 20190293817
    Abstract: Noise can be attenuated in marine seismic data from a marine seismic survey. A first near-continuous measurement of a wavefield and a second near-continuous measurement of the wavefield recorded from a marine seismic survey can be equalized, a coherent portion of the equalized second near-continuous measurement can be collapsed, and a noise model can be derived. The noise model can be subtracted from the second near-continuous measurement.
    Type: Application
    Filed: June 11, 2019
    Publication date: September 26, 2019
    Applicant: PGS Geophysical AS
    Inventors: Stian Hegna, Tilman Kluver
  • Publication number: 20190235112
    Abstract: Estimating an earth response can include deconvolving a multi-dimensional source wavefield from near-continuously recorded seismic data recorded at a receiver position. The deconvolving can include spreading the near-continuously recorded seismic data across a plurality of possible source emission angles. The result of the deconvolution can be the earth response estimate.
    Type: Application
    Filed: April 10, 2019
    Publication date: August 1, 2019
    Applicant: PGS Geophysical AS
    Inventors: Tilman Kluver, Stian Hegna
  • Patent number: 10338255
    Abstract: Noise can be attenuated in marine seismic data from a marine seismic survey. A first near-continuous measurement of a wavefield and a second near-continuous measurement of the wavefield recorded from a marine seismic survey can be equalized, a coherent portion of the equalized second near-continuous measurement can be collapsed, and a noise model can be derived. The noise model can be subtracted from the second near-continuous measurement.
    Type: Grant
    Filed: January 23, 2017
    Date of Patent: July 2, 2019
    Assignee: PGS Geophysical AS
    Inventors: Stian Hegna, Tilman Kluver
  • Patent number: 10267936
    Abstract: Estimating an earth response can include deconvolving a multi-dimensional source wavefield from near-continuously recorded seismic data recorded at a receiver position. The deconvolving can include spreading the near-continuously recorded seismic data across a plurality of possible source emission angles. The result of the deconvolution can be the earth response estimate.
    Type: Grant
    Filed: March 1, 2017
    Date of Patent: April 23, 2019
    Assignee: PGS Geophysical AS
    Inventors: Tilman Kluver, Stian Hegna
  • Publication number: 20190113645
    Abstract: Techniques are disclosed relating to performing marine surveys with non-uniform spacing of survey elements in a cross-line direction. This may include, for example, performing a survey pass in a multi-pass survey by towing a plurality of sources and sensors in a towing pattern with non-uniform spacing between adjacent ones of the sources. In some embodiments, the non-uniform spacing between adjacent ones of the sources is determined based on a common mid-point (CMP) spacing parameter for the survey pass in the cross-line direction. The spacing parameter may relate, for example, to difference in average CMP spacing for different parts of the survey spread, variance in CMP spacing, and/or width of the survey spread for which a threshold CMP spacing distance is satisfied. In various embodiments, the disclosed techniques may improve survey resolution and/or accuracy and may require a smaller number of survey passes and/or a reduced amount of survey equipment relative to traditional techniques.
    Type: Application
    Filed: October 9, 2018
    Publication date: April 18, 2019
    Inventors: Stian Hegna, Tilman Kluver, Jostein Lima
  • Publication number: 20180095186
    Abstract: A data set representing features of a geologic formation is formed from two or more signal acquisition data set representing independent aspects of the same wavefield. A wavelet transform is performed on the two or more signal acquisition data sets, and the data sets are further transformed to equalize signal portions of the data sets. Remaining differences in the data sets are interpreted as excess noise and are removed by different methods to improve the signal-to-noise ratio of any resulting data set.
    Type: Application
    Filed: October 4, 2017
    Publication date: April 5, 2018
    Inventor: Tilman Klüver
  • Patent number: 9921325
    Abstract: This disclosure is directed to systems and methods of wavefield separation based on matching operators that represents the relationship between co-located pressure and particle motions sensors. A pressure wavefield and a particle motion wavefield emitted from a subterranean formation are measured using co-located pressure and particle motion sensors located along one or more streamers of a seismic data acquisition system. A matching operator that relates pressure sensor and particle motion sensor responses for co-located pressure and particle motion sensors is computed based on depth of the co-located pressure and particle motion sensors and on the measured pressure and particle motion wavefields. The matching operator and the measured pressure and particle motion wavefields may then be used to compute up-going and down-going wavefields.
    Type: Grant
    Filed: December 16, 2014
    Date of Patent: March 20, 2018
    Assignee: PGS Geophysical AS
    Inventors: Stian Hegna, Tilman Kluver
  • Patent number: 9915745
    Abstract: At least some embodiments are directed to a system. The system includes a processor and a memory coupled to the processor. The memory stores a program that, when executed by the processor, causes the processor to calculate a pressure response of a first sensor, and correct pressure wavefield data obtained from the first sensor responsive to a first acoustic wavefield. The correction is based on the calculated pressure response of the first sensor. The pressure response of the first sensor is responsive to a second acoustic wavefield having a propagation path between a source of the second acoustic wavefield and the first sensor, in which the propagation path includes no reflection from a subsurface formation.
    Type: Grant
    Filed: March 30, 2016
    Date of Patent: March 13, 2018
    Assignee: PGS Geophysical AS
    Inventors: Stian Hegna, Tilman Kluver
  • Publication number: 20170299746
    Abstract: Noise can be attenuated in marine seismic data from a marine seismic survey. A first near-continuous measurement of a wavefield and a second near-continuous measurement of the wavefield recorded from a marine seismic survey can be equalized, a coherent portion of the equalized second near-continuous measurement can be collapsed, and a noise model can be derived. The noise model can be subtracted from the second near-continuous measurement.
    Type: Application
    Filed: January 23, 2017
    Publication date: October 19, 2017
    Applicant: PGS Geophysical AS
    Inventors: Stian Hegna, Tilman Kluver
  • Publication number: 20170299743
    Abstract: Estimating an earth response can include deconvolving a multi-dimensional source wavefield from near-continuously recorded seismic data recorded at a receiver position. The deconvolving can include spreading the near-continuously recorded seismic data across a plurality of possible source emission angles. The result of the deconvolution can be the earth response estimate.
    Type: Application
    Filed: March 1, 2017
    Publication date: October 19, 2017
    Applicant: PGS Geophysical AS
    Inventors: Tilman Kluver, Stian Hegna
  • Patent number: 9784869
    Abstract: A data set representing features of a geologic formation is formed from two or more signal acquisition data set representing independent aspects of the same wavefield. A wavelet transform is performed on the two or more signal acquisition data sets, and the data sets are further transformed to equalize signal portions of the data sets. Remaining differences in the data sets are interpreted as excess noise and are removed by different methods to improve the signal-to-noise ratio of any resulting data set.
    Type: Grant
    Filed: November 7, 2013
    Date of Patent: October 10, 2017
    Assignee: PGS Geophysical AS
    Inventor: Tilman Klüver
  • Patent number: 9696445
    Abstract: Computational systems and methods that combine global frequency-wavenumber-domain (“f-k domain”) filters with localized eigenimage based event selection to generate a resulting wavefield with reduced filter imprints on gather edges, reduced noise, and correct treatment of aliased energy are disclosed. The methods are executed by applying filters to the full set of seismic gather data in the f-k domain in order to obtain a resulting wavefield from recorded pressure and/or particle velocity data. The output of the filter is iteratively decomposed according to local dip values using eigenimage processing based on singular value decomposition (“SVD”). The same sample locations are extracted using SVD from the input in addition to generating input for a subsequent iteration with already processed data removed. Eigenimage processing methods allow for correct treatment of spatially aliased energy in f-k domain filtering.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: July 4, 2017
    Assignee: PGS Geophysical AS
    Inventors: Tilman Kluver, Anthony James Day
  • Publication number: 20170176620
    Abstract: Source element of a source subarray can be individually actuated according to an actuation sequence. The actuation sequence can be at least partially based on a relative position of each of the source elements within a particular geometry of the source subarray with respect to a previously actuated source element and a towing velocity of the source subarray.
    Type: Application
    Filed: November 7, 2016
    Publication date: June 22, 2017
    Applicant: PGS Geophysical AS
    Inventors: Jostein Lima, Tilman Kluver, Stian Hegna
  • Publication number: 20160377756
    Abstract: At least some embodiments are directed to a system. The system includes a processor and a memory coupled to the processor. The memory stores a program that, when executed by the processor, causes the processor to calculate a pressure response of a first sensor, and correct pressure wavefield data obtained from the first sensor responsive to a first acoustic wavefield. The correction is based on the calculated pressure response of the first sensor. The pressure response of the first sensor is responsive to a second acoustic wavefield having a propagation path between a source of the second acoustic wavefield and the first sensor, in which the propagation path includes no reflection from a subsurface formation.
    Type: Application
    Filed: March 30, 2016
    Publication date: December 29, 2016
    Applicant: PGS Geophysical AS
    Inventors: Stian Hegna, Tilman Kluver
  • Publication number: 20160170054
    Abstract: This disclosure is directed to systems and methods of wavefield separation based on matching operators that represents the relationship between co-located pressure and particle motions sensors. A pressure wavefield and a particle motion wavefield emitted from a subterranean formation are measured using co-located pressure and particle motion sensors located along one or more streamers of a seismic data acquisition system. A matching operator that relates pressure sensor and particle motion sensor responses for co-located pressure and particle motion sensors is computed based on depth of the co-located pressure and particle motion sensors and on the measured pressure and particle motion wavefields. The matching operator and the measured pressure and particle motion wavefields may then be used to compute up-going and down-going wavefields.
    Type: Application
    Filed: December 16, 2014
    Publication date: June 16, 2016
    Applicant: PGS Geophysical AS
    Inventors: Stian Hegna, Tilman Kluver
  • Publication number: 20140340987
    Abstract: A data set representing features of a geologic formation is formed from two or more signal acquisition data set representing independent aspects of the same wavefield. A wavelet transform is performed on the two or more signal acquisition data sets, and the data sets are further transformed to equalize signal portions of the data sets. Remaining differences in the data sets are interpreted as excess noise and are removed by different methods to improve the signal-to-noise ratio of any resulting data set.
    Type: Application
    Filed: November 7, 2013
    Publication date: November 20, 2014
    Inventor: Tilman KLÜVER
  • Publication number: 20140269183
    Abstract: Computational systems and methods that combine global frequency-wavenumber-domain (“f-k domain”) filters with localized eigenimage based event selection to generate a resulting wavefield with reduced filter imprints on gather edges, reduced noise, and correct treatment of aliased energy are disclosed. The methods are executed by applying filters to the full set of seismic gather data in the f-k domain in order to obtain a resulting wavefield from recorded pressure and/or particle velocity data. The output of the filter is iteratively decomposed according to local dip values using eigenimage processing based on singular value decomposition (“SVD”). The same sample locations are extracted using SVD from the input in addition to generating input for a subsequent iteration with already processed data removed. Eigenimage processing methods allow for correct treatment of spatially aliased energy in f-k domain filtering.
    Type: Application
    Filed: March 14, 2013
    Publication date: September 18, 2014
    Applicant: PGS Geophysical AS
    Inventors: Tilman Kluver, Anthony James Day
  • Patent number: 8239135
    Abstract: Filters are applied to seismic signals representative of subsurface formations to generate filtered signals with attenuated spatially aliased energy. The filtered signals are multiplied in the frequency-wavenumber domain by a complex function of frequency and wavenumber representing the seismic attribute in the frequency-wavenumber domain, to generate scaled signals. The scaled signals, transformed to the time-space domain, are divided by the filtered signals in the time-space domain, to a seismic attribute useful for identifying and characterizing the subsurface formations.
    Type: Grant
    Filed: May 7, 2009
    Date of Patent: August 7, 2012
    Assignee: PGS Geophysical AS
    Inventors: Anthony James Day, Tilman Klüver
  • Patent number: 8208342
    Abstract: A cross-line slowness is determined for each sample in the signals in towed marine seismic streamers. A range of assumed cross-line slownesses is selected. Vertical wavenumbers are determined using the range of assumed cross-line slowness determined for samples in the signals of pressure sensors and particle motion sensors in the towed marine seismic streamers. The determined vertical wavenumbers are used to correct the particle motion sensor signals for angle of incidence along the direction of the seismic streamers and transverse thereto to generate a corrected particle motion sensor signal. The corrected particle motion sensor signals are combined based on the determined cross-line slowness for the samples. The corrected particle motion sensor signal and the pressure sensor signal are used to determine at least one of upgoing and downgoing pressure components and upgoing and downgoing particle motion components of the particle motion sensor and pressure sensor seismic signals.
    Type: Grant
    Filed: September 14, 2009
    Date of Patent: June 26, 2012
    Assignee: PGS Geophysical AS
    Inventors: Tilman Klüver, Anthony James Day
  • Patent number: 8174926
    Abstract: A first weighted integral operator is applied to dual-sensor data to extrapolate the dual-sensor data to a first position above an acquisition surface, generating extrapolated data. A second weighted integral operator is applied to the extrapolated data to extrapolate the extrapolated data to a second position, generating wavefield separated data. One of the integral operators is applied to a scaled combination of the dual sensor data.
    Type: Grant
    Filed: January 20, 2009
    Date of Patent: May 8, 2012
    Assignee: PGS Geophysical AS
    Inventor: Tilman Klüver