Patents by Inventor Shahzad A. Asif
Shahzad A. Asif 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: 10598817Abstract: A method, apparatus, and program product utilize a buffer defined relative to a wellbore trajectory to generate a work zone around a wellbore for use in connection with formation modeling. In some embodiments, for example, a closed curve such as a non-rectangular, polygonal work zone may be defined around a wellbore based upon a buffer that extends generally transverse to the trajectory of a length of a wellbore a predetermined distance. In addition, boundaries may be defined in a work zone to effectively split the work zone into multiple closed curves or polygons in response to user editing, e.g., to create one or more subsurface layers in the work zone. In such instances, points defining a subsurface layer may be shared by adjacent layers such that editing of such points will affect each of the layers sharing such points.Type: GrantFiled: November 5, 2015Date of Patent: March 24, 2020Assignee: Schlumberger Technology CorporationInventors: Joan Abadie, Adrien Chassard, Mohammad Taghi Salehi, David Maggs, Shahzad Asif, Christopher Edward Morriss, Koji Ito
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Patent number: 10466375Abstract: A method for automatic interpretation of bulls-eye and sinusoidal features observed in LWD images is disclosed. In some embodiments, the method includes an automatic workflow for extracting smooth contours from images that demarcate boundaries of structural features, followed by projection of the contours to three-dimensional (3D) point clouds in the well coordinate system for structural interpretation. The method may characterize both sinusoidal features and bulls-eye features, taking into account variations of formation dip/azimuth, or well inclination/azimuth, on the topology of a structural feature. The disclosed method may be sufficiently fast for use in real-time analysis and interpretation, or to provide constraints for physics-based data inversion processing.Type: GrantFiled: February 27, 2015Date of Patent: November 5, 2019Assignee: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Sushil Shetty, John Rasmus, Christopher Edward Morriss, Koji Ito, Shahzad Asif, Vittorio Picco
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Patent number: 10451769Abstract: A method for transforming a 2D or 3D earth volume geometry into a 1D earth volume geometry includes performing a measurement using the measurement sensor in a wellbore. A layer boundary in the 2D or 3D earth volume geometry that is nearest to the measurement sensor is identified. A vector from the measurement sensor is generated toward the nearest layer boundary. A first intersection is identified between the vector and the nearest layer boundary, and a second intersection is identified between the vector and another layer boundary. Simulated boundaries that extend through the first and second intersections and are perpendicular to the vector are generated. The 1D earth volume geometry that is bounded by the first and second intersections is identified. A property value is extracted from the 2D or 3D earth volume geometry between the first and second intersections. The property value is assigned to the 1D earth geometry.Type: GrantFiled: January 25, 2016Date of Patent: October 22, 2019Assignee: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: John C. Rasmus, Christopher E. Morriss, Koji Ito, Hui Xie, Roger Griffiths, Shahzad A. Asif, David Maggs
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Patent number: 10323498Abstract: 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: GrantFiled: October 1, 2014Date of Patent: June 18, 2019Assignee: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Keli Sun, Koji Ito, Christopher E. Morriss, Roger Griffiths, Steve F. Crary, Shahzad A. Asif
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Publication number: 20160370480Abstract: A method for automatic interpretation of bulls-eye and sinusoidal features observed in LWD images is disclosed. In some embodiments, the method includes an automatic workflow for extracting smooth contours from images that demarcate boundaries of structural features, followed by projection of the contours to three-dimensional (3D) point clouds in the well coordinate system for structural interpretation. The method may characterize both sinusoidal features and bulls-eye features, taking into account variations of formation dip/azimuth, or well inclination/azimuth, on the topology of a structural feature. The disclosed method may be sufficiently fast for use in real-time analysis and interpretation, or to provide constraints for physics-based data inversion processing.Type: ApplicationFiled: February 27, 2015Publication date: December 22, 2016Inventors: Sushil Shetty, John Rasmus, Christopher Edward Morriss, Koji Ito, Shahzad Asif, Vittorio Picco
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Publication number: 20160237801Abstract: 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: ApplicationFiled: October 1, 2014Publication date: August 18, 2016Inventors: Keli Sun, Koji Ito, Christopher E. Morriss, Roger Griffiths, Steve F. Crary, Shahzad A. Asif
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Publication number: 20160216405Abstract: A method for transforming a 2D or 3D earth volume geometry into a 1D earth volume geometry includes performing a measurement using the measurement sensor in a wellbore. A layer boundary in the 2D or 3D earth volume geometry that is nearest to the measurement sensor is identified. A vector from the measurement sensor is generated toward the nearest layer boundary. A first intersection is identified between the vector and the nearest layer boundary, and a second intersection is identified between the vector and another layer boundary. Simulated boundaries that extend through the first and second intersections and are perpendicular to the vector are generated. The 1D earth volume geometry that is bounded by the first and second intersections is identified. A property value is extracted from the 2D or 3D earth volume geometry between the first and second intersections. The property value is assigned to the 1D earth geometry.Type: ApplicationFiled: January 25, 2016Publication date: July 28, 2016Inventors: John C. Rasmus, Christopher E. Morriss, Koji Ito, Hui Xie, Roger Griffiths, Shahzad A. Asif, David Maggs
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Publication number: 20160130916Abstract: A method, apparatus, and program product utilize a buffer defined relative to a wellbore trajectory to generate a work zone around a wellbore for use in connection with formation modeling. In some embodiments, for example, a closed curve such as a non-rectangular, polygonal work zone may be defined around a wellbore based upon a buffer that extends generally transverse to the trajectory of a length of a wellbore a predetermined distance. In addition, boundaries may be defined in a work zone to effectively split the work zone into multiple closed curves or polygons in response to user editing, e.g., to create one or more subsurface layers in the work zone. In such instances, points defining a subsurface layer may be shared by adjacent layers such that editing of such points will affect each of the layers sharing such points.Type: ApplicationFiled: November 5, 2015Publication date: May 12, 2016Inventors: Joan Abadie, Adrien Chassard, Mohammad Taghi Salehi, Shahzad Asif, Christopher Edward Morriss, Koji Ito
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Patent number: 9047689Abstract: A method for visualizing parametric logging data includes interpreting logging data sets, each logging data set corresponding to a distinct value of a progression parameter, calculating a geometric image including a representation of data from each of the logging data sets corresponding to a wellbore measured depth, and displaying the geometric image(s) at a position along a well trajectory corresponding to the wellbore measured depth. The progression parameter includes time, a resistivity measurement depth, differing tool modes that are sampling different volumes of investigation, and/or sampling different physical properties. The geometric images include a number of parallel lines having lengths determined according to the logging data and/or an azimuthal projection of the logging data, a number of concentric axial projections, and/or shapelets determined from parallel lines and/or concentric axial projections.Type: GrantFiled: October 15, 2009Date of Patent: June 2, 2015Assignee: Schlumberger Technology CorporationInventors: Christian Stolte, John C. Rasmus, Koji Ito, Shahzad A. Asif, Denis Heliot
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Patent number: 8473212Abstract: A method for processing well logging data includes method dividing the well logging data into a number of constant dimensional effect segments, where each constant dimensional effect segment defines an interval having a similar dimensional effect on the log response. The well logging data is taken from a highly deviated well. The method further includes dividing the constant dimensional effect segments into a number of constant property intervals, each constant dimensional effect segment including at least one corresponding constant property interval, and each constant property interval defining a wellbore distance over which a formation property is substantially constant that results in a log response having a low variance. The method further includes providing the constant property intervals to an output device.Type: GrantFiled: February 25, 2010Date of Patent: June 25, 2013Assignee: Schlumberger Technology CorporationInventors: John C. Rasmus, John P. Horkowitz, Koji Ito, Christian Stolte, Shahzad Asif, Bernadette Tabanou
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Publication number: 20120201425Abstract: A method for visualizing parametric logging data includes interpreting logging data sets, each logging data set corresponding to a distinct value of a progression parameter, calculating a geometric image including a representation of data from each of the logging data sets corresponding to a wellbore measured depth, and displaying the geometric image(s) at a position along a well trajectory corresponding to the wellbore measured depth. The progression parameter includes time, a resistivity measurement depth, differing tool modes that are sampling different volumes of investigation, and/or sampling different physical properties. The geometric images include a number of parallel lines having lengths determined according to the logging data and/or an azimuthal projection of the logging data, a number of concentric axial projections, and/or shapelets determined from parallel lines and/or concentric axial projections.Type: ApplicationFiled: October 15, 2009Publication date: August 9, 2012Inventors: Christian Stolte, John C. Rasmus, Koji Ito, Shahzad A. Asif, Denis Heliot
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Publication number: 20120188236Abstract: A method includes interpreting first dimensional data such as a caliper log for a wellbore at a first time, and interpreting second dimensional data such as a caliper log for the wellbore at a second time. The method further includes determining a dimensional differential in response to the first dimensional data and the second dimensional data. The dimensional differential includes a volume difference between cross-sectional profiles from the first dimensional data and the second dimensional data. The cross-sectional profiles for comparison may be at a specified axial location or range of axial locations in the wellbore. The method includes graphically displaying the dimensional differential by marking the dimensional differential with a first marker index where the first dimensional data is inside the second dimensional data, and with a second marker index where the first dimensional data is outside the second dimensional data.Type: ApplicationFiled: September 21, 2009Publication date: July 26, 2012Inventors: Fabienne Legendre, Koji Ito, Christian Stolte, John C. Rasmus, Shahzad A. Asif
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Publication number: 20100312478Abstract: A method for processing well logging data includes method dividing the well logging data into a number of constant dimensional effect segments, where each constant dimensional effect segment defines an interval having a similar dimensional effect on the log response. The well logging data is taken from a highly deviated well, which may include portions deviated at greater than 90-degrees. The method further includes dividing the constant dimensional effect segments into a number of constant property intervals, each constant dimensional effect segment including at least one corresponding constant property interval, and each constant property interval defining a wellbore distance over which a formation property is substantially constant that results in a log response having a low variance. The method further includes providing the constant property intervals to an output device.Type: ApplicationFiled: February 25, 2010Publication date: December 9, 2010Inventors: JACQUES R. TABANOU, John C. Rasmus, John P. Horkowitz, Koji Ito, Christian Stolte, Shahzad Asif, Bernadette Tabanou