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).
-
Patent number: 11994640Abstract: Processes and systems for imaging a subterranean formation using continuously recorded seismic data obtained during a marine seismic geophysical survey of the subterranean formation are described herein. The processes and systems compute upgoing pressure data at stationary-receiver locations, and low-frequency noise attenuation processes and systems are applied to the upgoing pressure wavefield data to obtain low-frequency noise attenuated upgoing pressure wavefield data. An image of the subterranean formation, or data indicative thereof, may be generated using the low-frequency noise attenuated upgoing pressure wavefield data at stationary-receiver locations.Type: GrantFiled: March 30, 2020Date of Patent: May 28, 2024Assignee: PGS Geophyscial ASInventors: Stian Hegna, Tilman Klüver
-
Patent number: 11579323Abstract: 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: GrantFiled: June 11, 2019Date of Patent: February 14, 2023Assignee: PGS Geophysical ASInventors: Stian Hegna, Tilman Kluver
-
Patent number: 11480701Abstract: 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: GrantFiled: October 9, 2018Date of Patent: October 25, 2022Assignee: PGS Geophysical ASInventors: Stian Hegna, Tilman Kluver, Jostein Lima
-
Patent number: 11125900Abstract: 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: GrantFiled: April 10, 2019Date of Patent: September 21, 2021Assignee: PGS GEOPHYSICAL ASInventors: Tilman Kluver, Stian Hegna
-
Publication number: 20200333490Abstract: Processes and systems for imaging a subterranean formation using continuously recorded seismic data obtained during a marine seismic geophysical survey of the subterranean formation are described herein. The processes and systems compute upgoing pressure data at stationary-receiver locations. and low-frequency noise attenuation processes and systems are applied to the upgoing pressure wavefield data to obtain low-frequency noise attenuated upgoing pressure wavefield data. An image of the subterranean formation, or data indicative thereof, may be generated using the low-frequency noise attenuated upgoing pressure wavefield data at stationary-receiver locations.Type: ApplicationFiled: March 30, 2020Publication date: October 22, 2020Applicant: PGS Geophyscial ASInventors: Stian Hegna, Tilman Kluver
-
Publication number: 20200271806Abstract: An inline source can be used for a marine survey. For example, a marine survey vessel can tow source units in line. The source units can be actuated near-continuously to cause a respective signal emitted by each of the source units to be uncorrelated with signals emitted by other of the source units.Type: ApplicationFiled: February 18, 2020Publication date: August 27, 2020Applicant: PGS Geophysical ASInventors: Stian Hegna, Tilman Kluver
-
Publication number: 20200081147Abstract: 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: ApplicationFiled: November 15, 2019Publication date: March 12, 2020Applicant: PGS Geophysical ASInventors: Jostein Lima, Tilman Kluver, Stian Hegna
-
Patent number: 10495770Abstract: 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: GrantFiled: November 7, 2016Date of Patent: December 3, 2019Assignee: PGS Geophysical ASInventors: Jostein Lima, Tilman Kluver, Stian Hegna
-
Publication number: 20190293817Abstract: 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: ApplicationFiled: June 11, 2019Publication date: September 26, 2019Applicant: PGS Geophysical ASInventors: Stian Hegna, Tilman Kluver
-
Publication number: 20190235112Abstract: 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: ApplicationFiled: April 10, 2019Publication date: August 1, 2019Applicant: PGS Geophysical ASInventors: Tilman Kluver, Stian Hegna
-
Patent number: 10338255Abstract: 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: GrantFiled: January 23, 2017Date of Patent: July 2, 2019Assignee: PGS Geophysical ASInventors: Stian Hegna, Tilman Kluver
-
Patent number: 10267936Abstract: 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: GrantFiled: March 1, 2017Date of Patent: April 23, 2019Assignee: PGS Geophysical ASInventors: Tilman Kluver, Stian Hegna
-
Publication number: 20190113645Abstract: 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: ApplicationFiled: October 9, 2018Publication date: April 18, 2019Inventors: Stian Hegna, Tilman Kluver, Jostein Lima
-
Publication number: 20180095186Abstract: 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: ApplicationFiled: October 4, 2017Publication date: April 5, 2018Inventor: Tilman Klüver
-
Patent number: 9921325Abstract: 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: GrantFiled: December 16, 2014Date of Patent: March 20, 2018Assignee: PGS Geophysical ASInventors: Stian Hegna, Tilman Kluver
-
Patent number: 9915745Abstract: 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: GrantFiled: March 30, 2016Date of Patent: March 13, 2018Assignee: PGS Geophysical ASInventors: Stian Hegna, Tilman Kluver
-
Publication number: 20170299746Abstract: 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: ApplicationFiled: January 23, 2017Publication date: October 19, 2017Applicant: PGS Geophysical ASInventors: Stian Hegna, Tilman Kluver
-
Publication number: 20170299743Abstract: 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: ApplicationFiled: March 1, 2017Publication date: October 19, 2017Applicant: PGS Geophysical ASInventors: Tilman Kluver, Stian Hegna
-
Patent number: 9784869Abstract: 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: GrantFiled: November 7, 2013Date of Patent: October 10, 2017Assignee: PGS Geophysical ASInventor: Tilman Klüver
-
Patent number: 9696445Abstract: 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: GrantFiled: March 14, 2013Date of Patent: July 4, 2017Assignee: PGS Geophysical ASInventors: Tilman Kluver, Anthony James Day