Patents by Inventor Charles Flaum

Charles Flaum 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: 7804296
    Abstract: Methods and apparatus for the characterization of formation fluids are disclosed. A downhole tool disposed in a borehole penetrating a subterranean formation obtains a NMR measurement, effects a change in a characteristic of the formation fluid, and obtains another NMR measurement subsequent to the change. Alternatively, the downhole tool effects a radial gradient of a characteristic of the formation and obtains NMR measurements at two or more selected radial distances from the wellbore wall. A parameter representative of the subterranean formation or the formation fluid is further determined from the NMR measurements.
    Type: Grant
    Filed: January 28, 2008
    Date of Patent: September 28, 2010
    Assignee: Schlumberger Technology Corporation
    Inventors: Charles Flaum, Robert L. Kleinberg, Christian Straley, Robert Badry, Austin Boyd, Olivier Faivre, Shawn Taylor, Anthony R. H. Goodwin
  • Patent number: 7765862
    Abstract: A drilling operation wherein a borehole can be drilled through earth formations with a drill bit at the end of a drill string, using recirculating drilling mud that flows downward through the drill string, exits through the drill bit, and returns to the earth's surface in the annulus between the drill string and the borehole wall, at least a portion of which has a mudcake thereon, and a surface pumping system for pumping the mud to recirculate.
    Type: Grant
    Filed: November 30, 2007
    Date of Patent: August 3, 2010
    Assignee: Schlumberger Technology Corporation
    Inventor: Charles Flaum
  • Patent number: 7642507
    Abstract: A tool for formation logging includes a support configured for movement in a borehole; a source mounted on the support, the source configured to emit neutrons and gamma rays; and at least one sensor mounted on the support and spaced apart from the source, wherein the at least one sensor is configured to detect at least one selected from the group consisting of gamma rays and neutrons. A method for formation logging in accordance with one embodiment of the invention includes emitting neutrons and gamma rays into a formation, using a source on a logging tool disposed in a borehole penetrating the formation; and detecting gamma-ray signals and neutron signals scattered by the formation, using at least one detector on the logging tool.
    Type: Grant
    Filed: February 15, 2006
    Date of Patent: January 5, 2010
    Assignee: Schlumberger Technology Corporation
    Inventors: Richard J. Radtke, Michael Evans, Charles Flaum
  • Publication number: 20090139321
    Abstract: A drilling operation wherein a borehole can be drilled through earth formations with a drill bit at the end of a drill string, using recirculating drilling mud that flows downward through the drill string, exits through the drill bit, and returns to the earth's surface in the annulus between the drill string and the borehole wall, at least a portion of which has a mudcake thereon, and a surface pumping system for pumping the mud to recirculate.
    Type: Application
    Filed: November 30, 2007
    Publication date: June 4, 2009
    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventor: Charles Flaum
  • Publication number: 20090143991
    Abstract: A method for determining true formation pressure in formations surrounding a fluid-containing borehole having a mudcake on the surface thereof, including the following steps: at a particular location in the borehole, monitoring the electrokinetic potential across the mudcake; modifying the borehole pressure at the particular location in the borehole; and determining the true formation pressure in the formations surrounding the particular location as being the borehole pressure at which the electrokinetic potential is substantially zero.
    Type: Application
    Filed: November 30, 2007
    Publication date: June 4, 2009
    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventor: Charles Flaum
  • Publication number: 20090091320
    Abstract: Methods and apparatus for the characterization of formation fluids are disclosed. A downhole tool disposed in a borehole penetrating a subterranean formation obtains a NMR measurement, effects a change in a characteristic of the formation fluid, and obtains another NMR measurement subsequent to the change. Alternatively, the downhole tool effects a radial gradient of a characteristic of the formation and obtains NMR measurements at two or more selected radial distances from the wellbore wall. A parameter representative of the subterranean formation or the formation fluid is further determined from the NMR measurements.
    Type: Application
    Filed: January 28, 2008
    Publication date: April 9, 2009
    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Charles Flaum, Robert L. Kleinberg, Christian Straley, Robert Badry, Austin Boyd, Olivier Faivre, Shawn Taylor, Anthony R.H. Goodwin
  • Patent number: 7511487
    Abstract: For use in logging downhole in an earth borehole, a method for determining a characteristic of oil, includes: providing and determining the viscosity of a plurality of crude oil samples; performing test measurements, using a predetermined operating mode, on media including the crude oil samples to obtain test data; applying a test processing procedure to the test data to obtain an output test parameter relating to the test data and the predetermined operating mode; deriving, for the plurality of crude oil samples, a correlation relating the output test parameter to the viscosities of the crude oil samples; performing downhole measurements in the measurement region with a logging device, operated with substantially the predetermined operating mode, to obtain logging data, and applying a measurement processing procedure to the logging data to obtain an output logging parameter; and determining the oil characteristic using the output logging parameter and the correlation.
    Type: Grant
    Filed: February 27, 2007
    Date of Patent: March 31, 2009
    Assignee: Schlumberger Technology Corporation
    Inventors: Robert Badry, Charles Flaum, Robert Kleinberg
  • Publication number: 20080204013
    Abstract: For use in logging downhole in an earth borehole, a method for determining a characteristic of oil that may be present in a downhole measurement region, includes the following steps: providing a plurality of crude oil samples; determining the viscosities of the crude oil samples; performing test measurements, using a predetermined operating mode, on media including the crude oil samples to obtain test data; applying a test processing procedure to the test data to obtain an output test parameter relating to the test data and the predetermined operating mode; deriving, for the plurality of crude oil samples, a correlation relating the output test parameter to the viscosities of the crude oil samples; performing downhole measurements in the measurement region with a logging device, operated with substantially the predetermined operating mode, to obtain logging data, and applying a measurement processing procedure to the logging data to obtain an output logging parameter; and determining the oil characteristic us
    Type: Application
    Filed: February 27, 2007
    Publication date: August 28, 2008
    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Robert Badry, Charles Flaum, Robert Kleinberg
  • Patent number: 7408150
    Abstract: A method for determining thermal capture cross-sections of formations surrounding an earth borehole, including the following steps: providing a logging device that is moveable through the borehole; transmitting, from the logging device, bursts of neutrons into the formations; detecting, at the logging device, resultant gamma ray counts, and deriving a measurement spectrum from the gamma ray counts; deriving a forward model comprising a combination of model exponential components having respective model decay times and model amplitudes; deriving an error function that depends on comparison between the forward model and the measurement spectrum; and determining, by regularized inversion, optimized exponential components of the model that substantially minimize the error function; the optimized exponential components being indicative of the thermal capture cross-sections of the formations.
    Type: Grant
    Filed: June 25, 2007
    Date of Patent: August 5, 2008
    Assignee: Schlumberger Technology Corporation
    Inventors: Charles Flaum, Charles Franklin Morris, Jr.
  • Patent number: 7361886
    Abstract: System and method for formation logging using a gamma-ray detector. The techniques including acquiring gamma-ray signals using the gamma-ray detector, the acquired gamma-ray signals having energies that span at least a first-energy region and a second-energy region, wherein the first-energy region includes energies higher than a selected threshold and the second-energy region includes energies lower than the selected threshold; determining interference signals based on the acquired gamma-ray signals in the first-energy region; and correcting the acquired gamma-ray signals in the second-energy region based on the interference signals to provide corrected gamma-ray signals.
    Type: Grant
    Filed: February 15, 2006
    Date of Patent: April 22, 2008
    Assignee: Schlumberger Technology Corporation
    Inventors: Christian Stoller, Michael Evans, Charles Flaum
  • Publication number: 20060192095
    Abstract: System and method for formation logging using a gamma-ray detector. The techniques including acquiring gamma-ray signals using the gamma-ray detector, the acquired gamma-ray signals having energies that span at least a first-energy region and a second-energy region, wherein the first-energy region includes energies higher than a selected threshold and the second-energy region includes energies lower than the selected threshold; determining interference signals based on the acquired gamma-ray signals in the first-energy region; and correcting the acquired gamma-ray signals in the second-energy region based on the interference signals to provide corrected gamma-ray signals.
    Type: Application
    Filed: February 15, 2006
    Publication date: August 31, 2006
    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Christian Stoller, Michael Evans, Charles Flaum
  • Publication number: 20060192096
    Abstract: A tool for formation logging includes a support configured for movement in a borehole; a source mounted on the support, the source configured to emit neutrons and gamma rays; and at least one sensor mounted on the support and spaced apart from the source, wherein the at least one sensor is configured to detect at least one selected from the group consisting of gamma rays and neutrons. A method for formation logging in accordance with one embodiment of the invention includes emitting neutrons and gamma rays into a formation, using a source on a logging tool disposed in a borehole penetrating the formation; and detecting gamma-ray signals and neutron signals scattered by the formation, using at least one detector on the logging tool.
    Type: Application
    Filed: February 15, 2006
    Publication date: August 31, 2006
    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Richard Radtke, Michael Evans, Charles Flaum
  • Patent number: 6891369
    Abstract: The present invention discloses a diffusion edited pulse technique that allows information about a fluid to be extracted, comprising: a) obtaining a fluid sample; b) generating a sequence of magnetic field pulses in the fluid, the sequence comprising an initial magnetic field pulse, a first portion that follows the initial magnetic field pulse, and a second portion that follows the first portion; c) detecting magnetic resonance signals using the second portion of the sequence; d) modifying the first portion of the sequence, and repeating steps (b) and (c); and e) extracting information about the fluid by determining relaxation and diffusion characteristics and their correlation based on the signals detected in steps (c) and (d). Also disclosed is a logging tool equipped with a processor to implement the diffusion edited pulse technique.
    Type: Grant
    Filed: December 13, 2002
    Date of Patent: May 10, 2005
    Assignee: Schlumberger Technology Corporation
    Inventors: Martin D. Hurlimann, Charles Flaum, Mark Flaum, Lalitha Venkataramanan, Robert L. Kleinberg
  • Patent number: 6850060
    Abstract: In one embodiment of the present invention, a method of measuring the molecular displacement of a fluid is disclosed comprising: (a) applying a strong magnetic field gradient to the fluid; (b) applying a sequence of oscillating magnetic field pulses to the fluid wherein the sequence includes a first portion followed by a second portion, wherein the first portion spatially modulates the magnetization state of the fluid and the second portion monitors the evolution of the modulation; (c) detecting magnetic resonance signals from the fluid; and (d) analyzing the detected signals to determine the molecular displacement of the fluid. This method may be used to determine the diffusion of the fluid or the restricted diffusion of the fluid through the porous media if the fluid is within a porous media (such as earth formation, bone, wood or other material). Also disclosed is a logging tool configured to implement this methodology.
    Type: Grant
    Filed: April 10, 2003
    Date of Patent: February 1, 2005
    Assignee: Schlumberger Technology Corporation
    Inventors: Yi-Qiao Song, Martin D. Hürlimann, Charles Flaum
  • Publication number: 20030197506
    Abstract: In one embodiment of the present invention, a method of measuring the molecular displacement of a fluid is disclosed comprising: (a) applying a strong magnetic field gradient to the fluid; (b) applying a sequence of oscillating magnetic field pulses to the fluid wherein the sequence includes a first portion followed by a second portion, wherein the first portion spatially modulates the magnetization state of the fluid and the second portion monitors the evolution of the modulation; (c) detecting magnetic resonance signals from the fluid; and (d) analyzing the detected signals to determine the molecular displacement of the fluid. This method may be used to determine the diffusion of the fluid or the restricted diffusion of the fluid through the porous media if the fluid is within a porous media (such as earth formation, bone, wood or other material). Also disclosed is a logging tool configured to implement this methodology.
    Type: Application
    Filed: April 10, 2003
    Publication date: October 23, 2003
    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Yi-Qiao Song, Martin D. Hurlimann, Charles Flaum
  • Publication number: 20030178994
    Abstract: The present invention discloses a diffusion edited pulse technique that allows information about a fluid to be extracted, comprising: a) obtaining a fluid sample; b) generating a sequence of magnetic field pulses in the fluid, the sequence comprising an initial magnetic field pulse, a first portion that follows the initial magnetic field pulse, and a second portion that follows the first portion; c) detecting magnetic resonance signals using the second portion of the sequence; d) modifying the first portion of the sequence, and repeating steps (b) and (c); and e) extracting information about the fluid by determining relaxation and diffusion characteristics and their correlation based on the signals detected in steps (c) and (d). Also disclosed is a logging tool equipped with a processor to implement the diffusion edited pulse technique.
    Type: Application
    Filed: December 13, 2002
    Publication date: September 25, 2003
    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION,
    Inventors: Martin D. Hurlimann, Charles Flaum, Mark Flaum, Lalitha Venkataramanan, Robert L. Kleinberg
  • Patent number: 6600315
    Abstract: A method that is usable with an NMR measurement apparatus includes averaging first spin echo trains acquired from different regions of a sample to form a second spin echo train. The first spin echo trains are used to produce a first estimate of a property of the sample, and the first estimate has a first resolution and a first accuracy. The second spin echo train is used to produce a second estimate of the property, and the second estimate has a second resolution that is lower than the first resolution and a second accuracy that is higher than the first accuracy. The first and second estimates are combined to produce a third estimate of the property. The third estimate has a third resolution near the first resolution of the first estimate and a third accuracy near the second accuracy of the second estimate.
    Type: Grant
    Filed: December 14, 2000
    Date of Patent: July 29, 2003
    Assignee: Schlumberger Technology Corporation
    Inventors: Nicholas J. Heaton, Charles Flaum, Chanh Cao Minh
  • Patent number: 6570382
    Abstract: NMR methods for extracting information about a fluid in rock and logging apparatuses for implementing such methods in a borehole environment are provided. The methods involve generating at least two different magnetic field pulse sequences. The magnetic field pulse sequences include a first portion and a second portion. A magnetic field pulse sequence is generated, and magnetic resonance signals are detected using the second portion of the sequence. The first portion of the sequence is modified, and again the sequence generated and magnetic resonance signals detected using the second portion. The magnetic resonance signals are analyzed, and information about, for example, diffusion coefficient, viscosity, composition, saturation in a rock, pore size, pore geometry and the like, extracted from the analyzed signals.
    Type: Grant
    Filed: November 28, 2000
    Date of Patent: May 27, 2003
    Assignee: Schlumberger Technology Corporation
    Inventors: Martin D. Hurlimann, Charles Flaum, Mark Flaum, Lalitha Venkataramanan
  • Patent number: 6268603
    Abstract: Methods and apparatuses for investigating formations surrounding a borehole involve acquiring a fluorescent signal over a portion of the borehole and analyzing the signal to detect the presence of crude oil. Analyzing the signal to detect the presence of crude oil may involve distinguishing mineral fluorescence from oil fluorescence. The signal may be analyzed further to distinguish characteristics of the crude oil, such as its grade (light, medium or heavy), and to indicate a physical property correlated with the fluorescence, such as the presence of laminations or formation permeability. In some embodiments, fluorescence signals from illuminating the portion of the borehole with at least two different wavelengths of light are analyzed.
    Type: Grant
    Filed: December 3, 1998
    Date of Patent: July 31, 2001
    Assignee: Schlumberger Technology Corporation
    Inventors: Oliver C. Mullins, Xu Wu, Charles Flaum
  • Patent number: 6232778
    Abstract: The present invention provides methods for determining the bound fluid volume (BFV) of a formation utilizing nuclear magnetic resonance (NMR) techniques in which less than full polarization occurs and in which less than a complete NMR distribution is acquired. The effect of the polarizing static magnetic field is shortened in time by applying a shortened wait time between NMR measurements so that only the bound fluid of the formation is polarized. The shortened wait time is effectuated by early application of the oscillating magnetic field to the formation which, in conjunction with a limited number of refocusing pulses, induces signals in the formation that are measured by the NMR tool. The peak amplitude of these signals corresponds to the BFV. The present invention provides information so that a partial polarization calculation curve in T2 lies almost equally between an empirical tapered cutoff curve and a theoretical tapered cutoff curve.
    Type: Grant
    Filed: June 11, 1998
    Date of Patent: May 15, 2001
    Assignee: Schlumberger Technology Corporation
    Inventors: Peter Speier, Steven F. Crary, Robert L. Kleinberg, Charles Flaum