Patents by Inventor Johan Olaf Anders Robertsson

Johan Olaf Anders Robertsson 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: 20140293743
    Abstract: It is described a method of interpolating and extrapolating seismic recordings, including the steps of deriving particle velocity related data from seismic recordings obtained by at least one streamer carrying a plurality of multi-component receivers and using the particle velocity related data to replace higher derivatives of pressure data in an expansion series.
    Type: Application
    Filed: June 17, 2014
    Publication date: October 2, 2014
    Inventor: JOHAN OLAF ANDERS ROBERTSSON
  • Patent number: 8775091
    Abstract: It is described a method of interpolating and extrapolating seismic recordings, including the steps of deriving particle velocity related data from seismic recordings obtained by at least one streamer carrying a plurality of multi-component receivers and using the particle velocity related data to replace higher derivatives of pressure data in an expansion series.
    Type: Grant
    Filed: March 5, 2013
    Date of Patent: July 8, 2014
    Assignee: WesternGeco L.L.C.
    Inventor: Johan Olaf Anders Robertsson
  • Publication number: 20130250721
    Abstract: It is described a method of interpolating and extrapolating seismic recordings, including the steps of deriving particle velocity related data from seismic recordings obtained by at least one streamer carrying a plurality of multi-component receivers and using the particle velocity related data to replace higher derivatives of pressure data in an expansion series.
    Type: Application
    Filed: March 5, 2013
    Publication date: September 26, 2013
    Applicant: WESTERNGECO L.L.C.
    Inventor: JOHAN OLAF ANDERS ROBERTSSON
  • Patent number: 7778108
    Abstract: A method of acquiring or processing multi-component seismic data obtained from seismic signals propagating in a medium, the method comprising the steps of: selecting a first portion of the seismic data in which the first arrival contains only upwardly propagating seismic energy above the seafloor; and determining a first calibration filter from the first portion of the seismic data, the first calibration filter being to calibrate a first component of the seismic data relative to a second component of the seismic data.
    Type: Grant
    Filed: May 29, 2008
    Date of Patent: August 17, 2010
    Assignee: WesternGeco L.L.C.
    Inventors: Dirk-Jan Van Manen, Johan Olaf Anders Robertsson, Aslaug Strommen Melbo
  • Patent number: 6775618
    Abstract: An improved de-ghosting method and system that utilizes multi-component marine seismic data recorded in a fluid medium. The method makes use of two types of data: pressure data that represents the pressure in the fluid medium, such as sea water, at a number of locations; and vertical particle motion data that represents the vertical particle motion of the acoustic energy propagating in the fluid medium at a number of locations within the same spatial area as the pressure data. The vertical particle motion data can be in various forms, for example, velocity, pressure gradient, displacement, or acceleration. A spatial filter is designed so as to be effective at separating up and down propagating acoustic energy over substantially the entire range of non-horizontal incidence angles in the fluid medium.
    Type: Grant
    Filed: September 18, 2001
    Date of Patent: August 10, 2004
    Assignee: Schlumberger Technology Corporation
    Inventors: Johan Olaf Anders Robertsson, Julian Edward Kragh, James Edward Martin