Patents by Inventor Gulamabbas A. Merchant

Gulamabbas A. Merchant 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: 8305082
    Abstract: Measurements made with a multicomponent logging system oriented in a horizontal position above the surface of the earth must satisfy certain relationships. These relationships are used to establish calibration errors in the system.
    Type: Grant
    Filed: December 13, 2006
    Date of Patent: November 6, 2012
    Assignee: Baker Hughes Incorporated
    Inventors: Gulamabbas Merchant, Luis M. Pelegri, Vladimir S. Mogilatov
  • Patent number: 8278931
    Abstract: A method for providing an image of a formation surrounding a wellbore, includes: obtaining an apparent conductivity curve from main components of resistivity measurements of the formation; performing fitting for cross-components of the resistivity measurements; calculating scaling factors from the cross-component data; scaling apparent conductivity data by the calculated scaling factors; and plotting the scaled conductivity data to provide the image of the anisotropic formation. A system and a computer program product are disclosed.
    Type: Grant
    Filed: July 13, 2009
    Date of Patent: October 2, 2012
    Assignee: Baker Hughes Incorporated
    Inventors: Sheng Fang, Andrew D. Kirkwood, Gulamabbas Merchant, Eric Hart, Tsili Wang
  • Patent number: 8117018
    Abstract: Cross-component measurements in combination with standard propagation resistivity measurements are processed to estimate the vertical and horizontal resistivities, relative dip and relative azimuth of an anisotropic earth formation.
    Type: Grant
    Filed: January 20, 2009
    Date of Patent: February 14, 2012
    Assignee: Baker Hughes Incorporated
    Inventors: Sheng Fang, Gulamabbas Merchant, Eric Hart, Andrew D. Kirkwood, Tsili Wang
  • Patent number: 8046170
    Abstract: A method of evaluating an earth formation is disclosed which includes conveying a logging tool into a borehole in the earth formation and using the logging tool to obtain a first set of azimuthally-independent resistivity measurements of the earth formation and a second set of azimuthally-sensitive resistivity measurements of the earth formation and estimating a value of a property of the earth formation using the first set of measurements and the second set of measurements, the estimation being substantially unaffected by a displacement of the logging tool from a center of the borehole.
    Type: Grant
    Filed: September 3, 2008
    Date of Patent: October 25, 2011
    Assignee: Baker Hughes Incorporated
    Inventor: Gulamabbas Merchant
  • Patent number: 7915895
    Abstract: A phase error in measurements made by a resistivity logging tool is estimated by positioning the tool above a conducting surface. Deviation of the measured phase difference between the transmitter and the receiver from 90° gives the phase error in the electronics. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.
    Type: Grant
    Filed: June 22, 2007
    Date of Patent: March 29, 2011
    Assignee: Baker Hughes Incorporated
    Inventors: Roland E. Chemali, Wallace H. Meyer, Gulamabbas Merchant, Tsili Wang
  • Patent number: 7814036
    Abstract: An artificial neural network, ANN, and method of training the ANN for inversion of logging tool signals into well logs of formation parameters is disclosed. Properly selected synthetic models of earth formations are used to train the ANN. The models include Oklahoma and chirp type of formations. In each model parameter contrasts of from 10 to 1 to about 100 to 1 are included. Models including maximum and minimum parameter values spanning the operating range of the selected logging tool are included. Parameter contrasts at interfaces are limited to realistic values found in earth formations. The selected models are used to generate synthetic tool signals, which are then used as inputs to the ANN for training. When the ANN coefficients are properly adjusted to produce an output matching the original models, the ANN can be used for inversion of any real signals from the selected logging tool.
    Type: Grant
    Filed: June 19, 2003
    Date of Patent: October 12, 2010
    Assignee: Haliburton Energy Services, Inc.
    Inventors: Dingding Chen, Luis E. San Martin, Gulamabbas A. Merchant, Robert W. Strickland, Martin T. Hagan
  • Patent number: 7778778
    Abstract: Measurements made by a multi-component induction logging tool are corrected for tool eccentricity in a deviated borehole. The eccentricity angle is determined from single frequency skin-effect corrected data and is then used to correct multifrequency data. Multifrequency focusing is then applied to the corrected multifrequency data. An inversion is then used to recover formation resistivity and relative dip and azimuth of the borehole.
    Type: Grant
    Filed: July 30, 2007
    Date of Patent: August 17, 2010
    Assignee: Baker Hughes Incorporated
    Inventors: Alexandre N. Bespalov, Gulamabbas Merchant, Cynthia Dong Xue, Luis M. Pelegri, Michael B. Rabinovich, Stephen V. Painchaud, Bill H. Corley, Stanislav W. Forgang, Randy Gold
  • Publication number: 20100057365
    Abstract: A method of evaluating an earth formation is disclosed which includes conveying a logging tool into a borehole in the earth formation and using the logging tool to obtain a first set of azimuthally-independent resistivity measurements of the earth formation and a second set of azimuthally-sensitive resistivity measurements of the earth formation and estimating a value of a property of the earth formation using the first set of measurements and the second set of measurements, the estimation being substantially unaffected by a displacement of the logging tool from a center of the borehole.
    Type: Application
    Filed: September 3, 2008
    Publication date: March 4, 2010
    Applicant: Baker Hughes Incorporated
    Inventor: Gulamabbas Merchant
  • Publication number: 20100007348
    Abstract: A method for providing an image of a formation surrounding a wellbore, includes: obtaining an apparent conductivity curve from main components of resistivity measurements of the formation; performing fitting for cross-components of the resistivity measurements; calculating scaling factors from the cross-component data; scaling apparent conductivity data by the calculated scaling factors; and plotting the scaled conductivity data to provide the image of the anisotropic formation. A system and a computer program product are disclosed.
    Type: Application
    Filed: July 13, 2009
    Publication date: January 14, 2010
    Applicant: BAKER HUGHES INCORPORATED
    Inventors: Sheng Fang, Andrew D. Kirkwood, Gulamabbas Merchant, Eric Hart, Tsili Wang
  • Patent number: 7629791
    Abstract: Measurements made by a multi-component induction logging tool are corrected for tool eccentricity in a deviated borehole. The eccentricity angle is determined from single frequency skin-effect corrected data and is then used to correct multifrequency data. Multifrequency focusing is then applied to the corrected multifrequency data. An inversion is then used to recover formation resistivity and relative dip and azimuth of the borehole.
    Type: Grant
    Filed: July 30, 2007
    Date of Patent: December 8, 2009
    Assignee: Baker Hughes Incorporated
    Inventors: Alexandre N. Bespalov, Gulamabbas Merchant, Cynthia Dong Xue, Luis M. Pelegri, Michael B. Rabinovich, Stephen V. Painchaud, Bill H. Corley, Stanislav W. Forgang, Randy Gold
  • Patent number: 7612566
    Abstract: Measurements made with a multicomponent logging instrument when used in a substantially horizontal borehole in earth formations provide diagnostic of the direction of beds relative to the position of the borehole. When the logging instrument is conveyed on a drilling assembly, the drilling trajectory may be maintained to follow a predetermined trajectory or to maintain a desired distance from a boundary such as an oil-water contact.
    Type: Grant
    Filed: June 5, 2007
    Date of Patent: November 3, 2009
    Assignee: Baker Hughes Incorporated
    Inventors: Gulamabbas A. Merchant, Otto N. Fanini, Berthold Kriegshauser, Liming Yu
  • Publication number: 20090192713
    Abstract: Cross-component measurements in combination with standard propagation resistivity measurements are processed to estimate the vertical and horizontal resistivities, relative dip and relative azimuth of an anisotropic earth formation.
    Type: Application
    Filed: January 20, 2009
    Publication date: July 30, 2009
    Applicant: Baker Hughes Incorporated
    Inventors: Sheng Fang, Gulamabbas Merchant, Eric Hart, Andrew D. Kirkwood, Tsili Wang
  • Publication number: 20080315883
    Abstract: A phase error in measurements made by a resistivity logging tool is estimated by positioning the tool above a conducting surface. Deviation of the measured phase difference between the transmitter and the receiver from 90° gives the phase error in the electronics. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.
    Type: Application
    Filed: June 22, 2007
    Publication date: December 25, 2008
    Applicant: BAKER HUGHES INCORPORATED
    Inventors: Roland E. Chemali, Wallace H. Meyer, Gulamabbas Merchant, Tsili Wang
  • Patent number: 7463035
    Abstract: Measurements made with a multicomponent logging instrument when used in a substantially horizontal borehole in earth formations are diagnostic of the direction of beds relative to the position of the borehole. When the logging instrument is conveyed on a drilling assembly, the drilling trajectory may be maintained to follow a predetermined trajectory or to maintain a desired distance from a boundary such as an oil-water contact.
    Type: Grant
    Filed: February 24, 2003
    Date of Patent: December 9, 2008
    Assignee: Baker Hughes Incorporated
    Inventors: Gulamabbas A. Merchant, Otto N. Fanini, Berthold Kriegshauser, Liming Yu
  • Patent number: 7375530
    Abstract: Cross-component measurements made at a plurality of toolface angles are processed to remove bias. The amplitude of the resulting sinusoid is used to estimate a distance to an interface in an earth formation.
    Type: Grant
    Filed: December 9, 2005
    Date of Patent: May 20, 2008
    Assignee: Baker Hughes Incorporated
    Inventors: Roland E. Chemali, Paul Cairns, Tsili Wang, Wallace H. Meyer, Andrew G. Brooks, Otto N. Fanini, Gulamabbas Merchant
  • Patent number: 7359800
    Abstract: Measurements made by multiarray and multicomponent induction resistivity measurements in a borehole are used for determining the orientation and length of fractures in an earth formation when the fractures have a fluid with a resistivity different from that of the earth formation. The apparatus and method may also be used in anisotropic earth formations where the vertical and horizontal resistivities are different.
    Type: Grant
    Filed: May 10, 2005
    Date of Patent: April 15, 2008
    Assignee: Baker Hughes Incorporated
    Inventors: Michael B. Rabinovich, Bill H. Corley, Gulamabbas Merchant, Tsili Wang, Edwinus Nicolaas Maria Quint
  • Publication number: 20080033654
    Abstract: Measurements made by a multi-component induction logging tool are corrected for tool eccentricity in a deviated borehole. The eccentricity angle is determined from single frequency skin-effect corrected data and is then used to correct multifrequency data. Multifrequency focusing is then applied to the corrected multifrequency data. An inversion is then used to recover formation resistivity and relative dip and azimuth of the borehole. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.
    Type: Application
    Filed: July 30, 2007
    Publication date: February 7, 2008
    Applicant: BAKER HUGHES INCORPORATED
    Inventors: Alexandre N. Bespalov, Gulamabbas Merchant, Cynthia Dong Xue, Luis M. Pelegri, Michael B. Rabinovich, Stephen V. Painchaud, Bill H. Corley, Stanislav W. Forgang, Randy Gold
  • Publication number: 20080030196
    Abstract: Measurements made by a multi-component induction logging tool are corrected for tool eccentricity in a deviated borehole. The eccentricity angle is determined from single frequency skin-effect corrected data and is then used to correct multifrequency data. Multifrequency focusing is then applied to the corrected multifrequency data. An inversion is then used to recover formation resistivity and relative dip and azimuth of the borehole. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. 37 CFR 1.72(b).
    Type: Application
    Filed: July 30, 2007
    Publication date: February 7, 2008
    Applicant: BAKER HUGHES INCORPORATED
    Inventors: Alexandre N. Bespalov, Gulamabbas Merchant, Cynthia Dong Xue, Luis M. Pelegri, Michael B. Rabinovich, Stephen V. Painchaud, Bill H. Corley, Stanislav W. Forgang, Randy Gold
  • Publication number: 20070236221
    Abstract: Measurements made with a multicomponent logging instrument when used in a substantially horizontal borehole in earth formations are diagnostic of the direction of beds relative to the position of the borehole. When the logging instrument is conveyed on a drilling assembly, the drilling trajectory may be maintained to follow a predetermined trajectory or to maintain a desired distance from a boundary such as an oil-water contact. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. 37 CFR 1.
    Type: Application
    Filed: June 5, 2007
    Publication date: October 11, 2007
    Applicant: BAKER HUGHES INCORPORATED
    Inventors: Gulamabbas Merchant, Otto Fanini, Berthold Kriegshauser, Liming Yu
  • Publication number: 20070115000
    Abstract: Measurements made with a multicomponent logging system oriented in a horizontal position above the surface of the earth must satisfy certain relationships. These relationships are used to establish calibration errors in the system.
    Type: Application
    Filed: December 13, 2006
    Publication date: May 24, 2007
    Applicant: Baker Hughes Incorporated
    Inventors: Gulamabbas Merchant, Luis Pelegri, Vladimir Mogilatov