Patents by Inventor Henk Keers
Henk Keers 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).
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Patent number: 9513391Abstract: To acquire near-zero offset survey data, a survey source and a first streamer attached to the survey source are provided, where the first streamer has at least one survey receiver. A second streamer separate from the survey source and the first streamer includes survey receivers. Near-zero offset data is measured using the at least one survey receiver of the first streamer.Type: GrantFiled: June 17, 2013Date of Patent: December 6, 2016Assignee: WESTERNGECO L. L. C.Inventors: Henk Keers, Aslaug Stroemmen Melboe, Jon-Fredrik Hopperstad, Johan O. A. Robertsson, Julian Edward Kragh, Morten Svendsen, Luren Yang, Svein Arne Frivik
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Patent number: 8873333Abstract: A method of processing geophysical signals obtained by—monitoring the response of the earth to an source using a plurality of receivers is described including the evaluation of sums or integrals of functions of weighted signal values over a one or multidimensional domain such that the domain is split into a plurality of simplices and the signal values are interpolated across the simplices using a non-linear approximation of the function, the approximation including signals and gradients of the signals, and the evaluated sums or integrals are used to obtain a representation of characteristics of the earth.Type: GrantFiled: October 15, 2007Date of Patent: October 28, 2014Assignee: WesternGeco L.L.C.Inventor: Henk Keers
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Publication number: 20130279291Abstract: To acquire near-zero offset survey data, a survey source and a first streamer attached to the survey source are provided, where the first streamer has at least one survey receiver. A second streamer separate from the survey source and the first streamer includes survey receivers. Near-zero offset data is measured using the at least one survey receiver of the first streamer.Type: ApplicationFiled: June 17, 2013Publication date: October 24, 2013Inventors: HENK KEERS, ASLAUG STROEMMEN MELBOE, JON-FREDRIK HOPPERSTAD, JOHAN O.A. ROBERTSSON, JULIAN EDWARD KRAGH, MORTEN SVENDSEN, LUREN YANG, SVEIN ARNE FRIVIK
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Patent number: 8467264Abstract: To acquire near-zero offset survey data, a survey source and a first streamer attached to the survey source are provided, where the first streamer has at least one survey receiver. A second streamer separate from the survey source and the first streamer includes survey receivers. Near-zero offset data is measured using the at least one survey receiver of the first streamer.Type: GrantFiled: June 3, 2008Date of Patent: June 18, 2013Assignee: WesternGeco L.L.C.Inventors: Henk Keers, Aslaug Stroemmen Melboe, Jon-Fredrik Hopperstad, Johan O. A. Robertsson, Ed Kragh, Morten Svendsen, Luren Yang, Svein Arne Frivik
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Patent number: 8451687Abstract: A technique includes receiving seismic data, which are indicative of pressure measurements and pressure gradient measurements acquired in a seismic survey of at least one subterranean formation. The technique includes modeling an image of the subterranean formation(s) as a function of the pressure measurements and the pressure gradient measurements. The technique includes determining the image based on the modeling.Type: GrantFiled: February 6, 2009Date of Patent: May 28, 2013Assignee: WesternGeco L.L.C.Inventors: Phil Kitchenside, Gabriele Busanello, Henk Keers
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Patent number: 8094513Abstract: To performing positioning of survey equipment, measurements of acoustic signals reflected from at least one boundary of a marine environment are received. The reflected acoustic signals are reflected from the at least one boundary in response to acoustic signaling originated by an acoustic source. A positioning model is updated based on the measurements of the acoustic signals, wherein the positioning model contains information relating to positions of components of a positioning system that includes the acoustic source and acoustic receiver.Type: GrantFiled: June 3, 2008Date of Patent: January 10, 2012Assignee: WesternGeco L.L.C.Inventors: Henk Keers, Suriyakan Vongtragool, Kenneth E. Welker, Svein Arne Frivik, Halvor Groenaas
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Publication number: 20110128817Abstract: A method of processing geophysical signals obtained by monitoring the response of the earth to an source using a plurality of receivers is described including the evaluation of sums or integrals of functions of weighted signal values over a one or multidimensional domain such that the domain is split into a plurality of simplices and the signal values are interpolated across the simplices using a non-linear approximation of the function, the approximation including signals and gradients of the signals, and the evaluated sums or integrals are used to obtain a representation of characteristics of the earth.Type: ApplicationFiled: October 15, 2007Publication date: June 2, 2011Applicant: WesternGecoInventor: Henk Keers
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Publication number: 20110085413Abstract: A technique includes receiving seismic data acquired by an array of seismic sensors during a towed marine survey of a subsurface and performing migration velocity analysis to determine a background velocity model of the subsurface based at least in part on particle motion derived from the seismic data.Type: ApplicationFiled: October 8, 2009Publication date: April 14, 2011Inventors: Henk Keers, Phil Kitchenside, Dave Nichols, Susanne Rentsch, Gabriele Busanello
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Publication number: 20100202250Abstract: A technique includes receiving seismic data, which are indicative of pressure measurements and pressure gradient measurements acquired in a seismic survey of at least one subterranean formation. The technique includes modeling an image of the subterranean formation(s) as a function of the pressure measurements and the pressure gradient measurements. The technique includes determining the image based on the modeling.Type: ApplicationFiled: February 6, 2009Publication date: August 12, 2010Inventors: Phil Kitchenside, Gabriele Busanello, Henk Keers
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Publication number: 20100142316Abstract: A technique includes providing seismic data acquired in a seismic survey of a medium. The seismic data includes particle motion data. The technique includes modeling waves propagating through the medium during the survey as a function of at least one property of the medium and the seismic data. The technique includes, based on the modeling, determining the property(ies) of the medium.Type: ApplicationFiled: December 7, 2008Publication date: June 10, 2010Inventors: Henk Keers, Paul Childs
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Publication number: 20100039890Abstract: A seismic data acquisition assembly includes a cable; seismic sensors that are disposed along the cable; and a filler material inside the cable. The filler includes a hydrocarbon-based liquid and an agent to cause the filler material to have a rheological property that is substantially different than a corresponding rheological property of the hydrocarbon-based liquid.Type: ApplicationFiled: August 18, 2008Publication date: February 18, 2010Inventors: Gary John Tustin, Gerald Henry Meeten, Timothy G.J. Jones, Valerie Anderson, Oeystein Traetten, Henk Keers, Ottar Kristiansen, Nils Halvor Heieren, Leendert Combee, Bent Andreas Kjellesvig
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Publication number: 20090296519Abstract: To performing positioning of survey equipment, measurements of acoustic signals reflected from at least one boundary of a marine environment are received. The reflected acoustic signals are reflected from the at least one boundary in response to acoustic signaling originated by an acoustic source.Type: ApplicationFiled: June 3, 2008Publication date: December 3, 2009Inventors: HENK KEERS, Suriyakan Vongtragool, Kenneth E. Welker, Svein Arne Frivik, Halvor Groenaas
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Publication number: 20090296520Abstract: To acquire near-zero offset survey data, a survey source and a first streamer attached to the survey source are provided, where the first streamer has at least one survey receiver. A second streamer separate from the survey source and the first streamer includes survey receivers. Near-zero offset data is measured using the at least one survey receiver of the first streamer.Type: ApplicationFiled: June 3, 2008Publication date: December 3, 2009Inventors: Henk Keers, Aslaug Stroemmen Melboe, Jon-Fredrik Hopperstad, Johan O.A. Robertsson, Ed Kragh, Morten Svendsen, Luren Yang, Svein Arne Frivik
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Patent number: 7203600Abstract: A mehtod of determinig an integral of a function over an n-dimensional intergratio domain from the values of the function at a plurality of discrete data points within the integration domain, comprises partitioning the integration domain into a plurality of k-dimensional simplexes, where k<=n. The function is integrated over each simplex, and the results are summed. The method may be applied in the processing of geophysical data such as, for example, seismic data, where the function is a function of at least the geophysical data. The processed data may then be used to obtain information about the physical properties of the earth's interior.Type: GrantFiled: December 17, 2004Date of Patent: April 10, 2007Assignee: WesternGeco, L.L.C.Inventors: Henk Keers, Henrik Bernth, Christopher Chapman, David Nichols
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Publication number: 20050143923Abstract: A method of determining an integral of a function over an n-dimensional integration domain from the values of the function at a plurality of discrete data points within the integration domain, comprises partitioning the integration domain into a plurality of k-dimensional simplexes, where k?n. The function is integrated over each simplex, and the results are summed. The method may be applied in the processing of geophysical data such as, for example, seismic data, where the function is a function of at least the geophysical data. The processed data may then be used to obtain information about the physical properties of the earth's interior.Type: ApplicationFiled: December 17, 2004Publication date: June 30, 2005Inventors: Henk Keers, Henrik Bernth, Christopher Chapman, David Nichols