Patents by Inventor Steve F. Crary

Steve F. Crary 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: 10370963
    Abstract: Techniques for log squaring using both directional and non-directional electromagnetic measurements are disclosed. The techniques described herein can be used for determining bed boundary locations and assigning resistivity values to each layer in a layered earth model, regardless of well deviation. Potential bed boundary locations can be derived from both directional and non-directional electromagnetic measurement data. The bed boundary locations from the directional and non-directional measurements can then be consolidated using a weighted averaging scheme, where weight can be dependent based on apparent formation dip. By combining the results from both directional and non-directional measurements, the log squaring techniques described herein can be used in most wells regardless of the well angle (the angle can be arbitrary). Once bed boundaries are selected, formation properties, such as horizontal resistivity (Rh) and vertical resistivity (Rv) can be assigned to the model layers.
    Type: Grant
    Filed: September 30, 2014
    Date of Patent: August 6, 2019
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Keli Sun, Dzevat Omeragic, Steve F. Crary
  • Patent number: 10353107
    Abstract: A petrophysically regularized time domain nuclear magnetic resonance (NMR) inversion includes using an NMR tool to acquire NMR data and inverting the acquired NMR data in a time domain using petrophysical constraints. The inverted NMR data is analyzed. The petrophysical constraints may be identified by: determining a number of porobodons to seek, defining a plurality of zones in which only a subset of porobodon sets is present, and stacking all NMR echoes in each zone satisfying discriminators. The number of porobodons to seek may be based on knowledge of core samples, logs, and NMR sensitivity. The discriminator logs may be logs sensitive to porosity partitioning. A computing system having a processor, a memory, and a program stored in memory may be configured to perform the method. The system may be conveyed downhole on a wireline, a while-drilling drill string, a coiled tubing, a slickline, or a wired drill pipe.
    Type: Grant
    Filed: October 31, 2012
    Date of Patent: July 16, 2019
    Assignees: SCHLUMBERGER TECHNOLOGY CORPORATION, SAUDI ARABIAN OIL COMPANY
    Inventors: David F. Allen, George Bordakov, Steve F. Crary, Philip Savundararaj, Ramsin Eyvazzadeh, Edward Alan Clerke, Johannes J. Buiting, Paul Smith, Jim Funk
  • Patent number: 10323498
    Abstract: Methods, computer-readable media, and systems are disclosed for applying 1D processing in a non-1D formation. In some embodiments, a 3D model or curtain section of a subsurface earth formation may be obtained. A processing window within the 3D model or curtain that is suitable for 1D inversion processing is determined, and a local 1D model for the processing window is built. A 1D inversion is performed on the local 1D model, and inverted formation parameters are used to update the 3D model or curtain section.
    Type: Grant
    Filed: October 1, 2014
    Date of Patent: June 18, 2019
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Keli Sun, Koji Ito, Christopher E. Morriss, Roger Griffiths, Steve F. Crary, Shahzad A. Asif
  • Publication number: 20180347280
    Abstract: A drill string can include an electromagnetic transmitter oriented at an actual effective tilt angle with respect to the drill string and an electromagnetic receiver oriented at an actual effective tilt angle with respect to the drill string. The transmitter and received can be used to investigate geologic formations surrounding the drill string, and measurements of the geologic formations can be based on the actual effective tilt angles of the transmitter and the receiver.
    Type: Application
    Filed: September 26, 2016
    Publication date: December 6, 2018
    Inventors: Helen Xiaoyan Zhong, Steve F. Crary, Mark T. Frey
  • Publication number: 20180292563
    Abstract: Methods capable of determining a depth of investigation of a logging tool can include generating an error distribution model for a logging tool. The methods can also include defining a detection threshold above which a measured signal from a measurement channel of the logging tool can be considered reliable based on output from the error distribution model, and generating a simulated formation model to determine the depth of investigation. The depth of investigation can be biased by the detection threshold.
    Type: Application
    Filed: September 26, 2016
    Publication date: October 11, 2018
    Inventors: Helen Xiaoyan Zhong, Steve F. Crary, Ettore Mirto, Christophe Dupuis, Weixin Dong, Mark T. Frey
  • Patent number: 10073189
    Abstract: An inversion based calibration method for downhole electromagnetic tools includes processing an inversion of a formation model using acquired electromagnetic measurement data to obtain formation parameters and calibration parameters for at least one measurement array.
    Type: Grant
    Filed: February 15, 2013
    Date of Patent: September 11, 2018
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Andrei I. Davydychev, Michael Thiel, Dzevat Omeragic, Steve F. Crary
  • Publication number: 20160245080
    Abstract: Techniques for log squaring using both directional and non-directional electromagnetic measurements are disclosed. The techniques described herein can be used for determining bed boundary locations and assigning resistivity values to each layer in a layered earth model, regardless of well deviation. Potential bed boundary locations can be derived from both directional and non-directional electromagnetic measurement data. The bed boundary locations from the directional and non-directional measurements can then be consolidated using a weighted averaging scheme, where weight can be dependent based on apparent formation dip. By combining the results from both directional and non-directional measurements, the log squaring techniques described herein can be used in most wells regardless of the well angle (the angle can be arbitrary). Once bed boundaries are selected, formation properties, such as horizontal resistivity (Rh) and vertical resistivity (Rv) can be assigned to the model layers.
    Type: Application
    Filed: September 30, 2014
    Publication date: August 25, 2016
    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Keli Sun, Dzevat Omeragic, Steve F. Crary
  • Publication number: 20160237801
    Abstract: Methods, computer-readable media, and systems are disclosed for applying 1D processing in a non-1D formation. In some embodiments, a 3D model or curtain section of a subsurface earth formation may be obtained. A processing window within the 3D model or curtain that is suitable for 1D inversion processing is determined, and a local 1D model for the processing window is built. A 1D inversion is performed on the local 1D model, and inverted formation parameters are used to update the 3D model or curtain section.
    Type: Application
    Filed: October 1, 2014
    Publication date: August 18, 2016
    Inventors: Keli Sun, Koji Ito, Christopher E. Morriss, Roger Griffiths, Steve F. Crary, Shahzad A. Asif
  • Publication number: 20150301222
    Abstract: An inversion based calibration method for downhole electromagnetic tools includes processing an inversion of a formation model using acquired electromagnetic measurement data to obtain formation parameters and calibration parameters for at least one measurement array.
    Type: Application
    Filed: February 15, 2013
    Publication date: October 22, 2015
    Inventors: Andrei I. Davydychev, Michael Thiel, Dzevat Omeragic, Steve F. Crary
  • Publication number: 20140285190
    Abstract: A petrophysically regularized time domain nuclear magnetic resonance (NMR) inversion includes using an NMR tool to acquire NMR data and inverting the acquired NMR data in a time domain using petrophysical constraints. The inverted NMR data is analyzed. The petrophysical constraints may be identified by: determining a number of porobodons to seek, defining a plurality of zones in which only a subset of porobodon sets is present, and stacking all NMR echoes in each zone satisfying discriminators. The number of porobodons to seek may be based on knowledge of core samples, logs, and NMR sensitivity. The discriminator logs may be logs sensitive to porosity partitioning. A computing system having a processor, a memory, and a program stored in memory may be configured to perform the method. The system may be conveyed downhole on a wireline, a while-drilling drill string, a coiled tubing, a slickline, or a wired drill pipe.
    Type: Application
    Filed: October 31, 2012
    Publication date: September 25, 2014
    Inventors: David F. Allen, George Bordakov, Steve F. Crary, Philip Savundararaj, Ramsin Eyvazzadeh, Edward Alan Clerke, Johannes J. Buiting, Paul Smith, Jim Funk