Patents by Inventor David F. Allen
David F. Allen 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: 10444399Abstract: A method for determining resistivity of subsurface formations includes generating an initial model of the formations from multiaxial electromagnetic transimpedance measurements, the model comprising values of vertical resistivity, horizontal resistivity, crossbed dip, crossbed azimuth, and bedding dip and azimuth. Expected measurements generated from the initial model measurements are decomposed into ordinary and extraordinary components. The actual tool measurements are compared to the summation of the expected decomposed measurement components. The initial model is adjusted, the expected decomposed components are recalculated and the foregoing are repeated until the difference between the actual tool measurements and the summation of the expected decomposed components falls below a selected threshold.Type: GrantFiled: March 26, 2015Date of Patent: October 15, 2019Assignee: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Gong Li Wang, Thomas Barber, Peter Wu, David F. Allen, Aria Abubakar
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Patent number: 10353107Abstract: 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: GrantFiled: October 31, 2012Date of Patent: July 16, 2019Assignees: SCHLUMBERGER TECHNOLOGY CORPORATION, SAUDI ARABIAN OIL COMPANYInventors: David F. Allen, George Bordakov, Steve F. Crary, Philip Savundararaj, Ramsin Eyvazzadeh, Edward Alan Clerke, Johannes J. Buiting, Paul Smith, Jim Funk
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Patent number: 10330817Abstract: A method for generating a porosity log for a reservoir in an organic shale. The method includes receiving data representing one or more parameters in a reservoir in an organic shale. At least one of the parameters includes porosity. By stochastically inverting the data, a distribution of porobodon features is estimated that matches an observed pulse decay curve. The porosity data relates to petrophysical restrictions on at least one of the porobodon features.Type: GrantFiled: January 12, 2016Date of Patent: June 25, 2019Assignee: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: George A. Bordakov, David F. Allen
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Publication number: 20170003412Abstract: A method for generating a porosity log for a reservoir in an organic shale. The method includes receiving data representing one or more parameters in a reservoir in an organic shale. At least one of the parameters includes porosity. By stochastically inverting the data, a distribution of porobodon features is estimated that matches an observed pulse decay curve. The porosity data relates to petrophysical restrictions on at least one of the porobodon features.Type: ApplicationFiled: January 12, 2016Publication date: January 5, 2017Inventors: George A. Bordakov, David F. Allen
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Publication number: 20150276966Abstract: A method for determining resistivity of subsurface formations includes generating an initial model of the formations from multiaxial electromagnetic transimpedance measurements, the model comprising values of vertical resistivity, horizontal resistivity, crossbed dip, crossbed azimuth, and bedding dip and azimuth. Expected measurements generated from the initial model measurements are decomposed into ordinary and extraordinary components. The actual tool measurements are compared to the summation of the expected decomposed measurement components. The initial model is adjusted, the expected decomposed components are recalculated and the foregoing are repeated until the difference between the actual tool measurements and the summation of the expected decomposed components falls below a selected threshold.Type: ApplicationFiled: March 26, 2015Publication date: October 1, 2015Inventors: Gong Li Wang, Thomas Barber, Peter Wu, David F. Allen, Aria Abubakar
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Publication number: 20140285190Abstract: 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: ApplicationFiled: October 31, 2012Publication date: September 25, 2014Inventors: David F. Allen, George Bordakov, Steve F. Crary, Philip Savundararaj, Ramsin Eyvazzadeh, Edward Alan Clerke, Johannes J. Buiting, Paul Smith, Jim Funk
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Patent number: 7617050Abstract: A method for estimating hydrocarbon volume in a layered subsurface formation includes determining a vertical resistivity and a horizontal resistivity in the formation. A bound water saturation and a total porosity of individual layers of the formation are determined. Values of horizontal resistivity and vertical resistivity of the formation are calculated based on the bound water saturation and the total porosity for each layer and on an estimated irreducible bulk volume of water in each layer. The estimated values are compared to the determined horizontal resistivity and vertical resistivity. The estimated irreducible water saturation in each layer is adjusted and estimating the values is repeated until differences between the estimated values and the determined vertical and horizontal resistivity values fall below a selected threshold. The hydrocarbon volume is estimated from the adjusted irreducible water saturation for each layer.Type: GrantFiled: August 9, 2007Date of Patent: November 10, 2009Assignee: Schlumberg Technology CorporationInventors: David F. Allen, Georgiy Bordakov
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Publication number: 20090043510Abstract: A method for estimating hydrocarbon volume in a layered subsurface formation includes determining a vertical resistivity and a horizontal resistivity in the formation. A bound water saturation and a total porosity of individual layers of the formation are determined. Values of horizontal resistivity and vertical resistivity of the formation are calculated based on the bound water saturation and the total porosity for each layer and on an estimated irreducible bulk volume of water in each layer. The estimated values are compared to the determined horizontal resistivity and vertical resistivity. The estimated irreducible water saturation in each layer is adjusted and estimating the values is repeated until differences between the estimated values and the determined vertical and horizontal resistivity values fall below a selected threshold. The hydrocarbon volume is estimated from the adjusted irreducible water saturation for each layer.Type: ApplicationFiled: August 9, 2007Publication date: February 12, 2009Applicant: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: David F. Allen, Georgiy Bordakov
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Patent number: 6894493Abstract: The present invention relates to a method and apparatus for determining the presence of magnetic materials in a media, such as an earth formation. More specifically, the method of the present invention correlates a diffusion-relaxation calibration function representative of magnetic materials with a 2-D function developed using diffusion-editing to determine the presence and relative content of magnetic materials in a media.Type: GrantFiled: December 9, 2003Date of Patent: May 17, 2005Assignee: Schlumberger Technology CorporationInventors: Martin D. Hürlimann, Abigail Matteson, Jermane Edward Massey, David F. Allen
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Publication number: 20040164735Abstract: The present invention relates to a method and apparatus for determining the presence of magnetic materials in a media, such as an earth formation. More specifically, the method of the present invention correlates a diffusion-relaxation calibration function representative of magnetic materials with a 2-D function developed using diffusion-editing to determine the presence and relative content of magnetic materials in a media.Type: ApplicationFiled: December 9, 2003Publication date: August 26, 2004Applicant: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Martin D. Hurlimann, Abigail Matteson, Jermane Edward Massey, David F. Allen
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Patent number: 5223497Abstract: A method for treating habit disorders in a human patient comprising administering to the patient an anti-habitual amount of a pharmaceutically active compound, which results in activation of a brain reward system, e.g., flupenthixol, or esters thereof or pharmaceutically acceptable salts thereof, either alone or in admixture with a physiologically acceptable diluent.Type: GrantFiled: March 4, 1992Date of Patent: June 29, 1993Assignee: Yale UniversityInventors: Frank H. Gawin, Brian G. Humblestone, David F. Allen
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Patent number: 5114942Abstract: A method for treating habit disorders in a human patient comprising administering to the patient an antihabitual amount of a pharmaceutically active compound, which results in activation of a brain reward system, e.g., flupenthixol, or esters thereof or pharmaceutically acceptable salts thereof, either alone or in admixture with a physiologically acceptable diluent.Type: GrantFiled: January 15, 1991Date of Patent: May 19, 1992Assignee: Yale UniversityInventors: Frank H. Gawin, Brian G. Humblestone, David F. Allen
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Patent number: 5059600Abstract: A method for teating habit disorders in a human patient comprising administering to the patient an anti-habitual amount of a pharmaceutically active compound, which results in activation of a brain reward system, e.g., flupenthixol, or esters thereof or pharmaceutically acceptable salts thereof, either alone or in admixture with a physiologically acceptable diluent.Type: GrantFiled: March 31, 1989Date of Patent: October 22, 1991Assignee: Yale UniversityInventors: Frank H. Gawin, Brian G. Humblestone, David F. Allen