Patents by Inventor Kentaro Indo

Kentaro Indo 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: 10746019
    Abstract: A method includes pumping fluid from outside of a downhole tool through a flowline of the downhole tool with a pump. The method further includes taking a first plurality of measurements over time using at least one sensor and estimating a future saturation pressure of the fluid within the flowline at constant time increments via a processor based at least in part on the first plurality of measurements and a saturation pressure model. The method further includes adjusting the flowline pressure to maintain the pressure of the flowline above the estimated future saturation pressure.
    Type: Grant
    Filed: November 1, 2016
    Date of Patent: August 18, 2020
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Kentaro Indo, Julian J. Pop, Ji Qi, Sepand Ossia
  • Patent number: 10704388
    Abstract: A method includes positioning a downhole acquisition tool in a well-logging device in a wellbore in a geological formation, where the wellbore or the geological formation, or both contain a reservoir fluid. The method includes performing downhole fluid analysis using a downhole acquisition tool in the wellbore to determine a plurality of fluid properties associated with the reservoir fluid. The method includes generating a nonlinear predictive control model representative of the plurality of fluid properties based at least in part on the downhole fluid analysis. The method includes adjusting the nonlinear predictive control model based at least in part on an output representative of a pump flow control sequence at a first time interval and the plurality of fluid properties.
    Type: Grant
    Filed: March 22, 2017
    Date of Patent: July 7, 2020
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Julian Pop, Vianney Bruned, Kentaro Indo, Sepand Ossia, Steven G. Villareal
  • Patent number: 10704379
    Abstract: A method for sampling a downhole formation fluid includes pumping formation fluid into the flowline of a downhole sampling tool. The method can also include measuring a saturation pressure of the formation fluid in the flowline while pumping. The method can also include adjusting the pumping rate such that the fluid pressure in the flowline remains within a predetermined threshold above the measured saturation pressure.
    Type: Grant
    Filed: August 16, 2017
    Date of Patent: July 7, 2020
    Inventors: Kentaro Indo, Julian Pop, Maxim Yushko, Tudor Ioan Palaghita, Zeynep Alpman, Alexis Petit, Sepand Ossia, Tullio Moscato
  • Patent number: 10689980
    Abstract: A method includes operating a downhole acquisition tool in a wellbore in a geological formation. The wellbore or the geological formation, or both, contain a reservoir fluid. The method also includes receiving a portion of the reservoir fluid into the downhole acquisition tool and performing downhole fluid analysis using the downhole acquisition tool in the wellbore to determine at least one measurement associated with the portion of the reservoir fluid. The at least one measurement includes fluid density, optical density, or both. The method also includes using a processor of the downhole acquisition tool to obtain compressibility of the reservoir fluid based at least in part on the fluid density, the optical density, or both and determining a composition of the reservoir fluid based at least in part on the compressibility.
    Type: Grant
    Filed: May 12, 2017
    Date of Patent: June 23, 2020
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Kai Hsu, Hadrien Dumont, Anthony Robert Holmes Goodwin, Kentaro Indo, Julian Pop
  • Patent number: 10689979
    Abstract: A method for sampling a downhole formation fluid that includes pumping formation fluid into the flowline of a downhole sampling tool. The method also includes measuring a saturation pressure of the formation fluid in the flowline while pumping, and adjusting the pumping rate such that the fluid pressure in the flowline remains within a predetermined threshold above the measured saturation pressure.
    Type: Grant
    Filed: June 15, 2017
    Date of Patent: June 23, 2020
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Kentaro Indo, Maxim Yushko, Tudor Ioan Palaghita, Zeynep Alpman, Alexis Petit, Julian Pop, Sepand Ossia, Tullio Moscato
  • Patent number: 10358918
    Abstract: Obtaining in-situ, at a first time, first optical spectral data associated with a formation fluid flowing through a downhole formation fluid sampling apparatus, and then obtaining in-situ, at a second time after the first time, second optical spectral data associated with the formation fluid flowing through the downhole formation fluid sampling apparatus. A wavelength-independent scattering intensity within the formation fluid flowing through the downhole formation fluid sampling apparatus is then determined based on the first and second optical spectral data, and a wavelength-dependent scattering intensity within the formation fluid flowing through the downhole formation fluid sampling apparatus is determined based on the first and second optical spectral data.
    Type: Grant
    Filed: October 15, 2015
    Date of Patent: July 23, 2019
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Kai Hsu, Kentaro Indo, Julian Pop
  • Patent number: 10352160
    Abstract: According to certain embodiments, formation fluid properties, such as gas-oil ratio (GOR), formation volume factor (FVF), and density, may be measured at multiple times during sampling. In one embodiment, data representing the measured properties is analyzed and a characteristic of interest is determined through extrapolation from the analyzed data. Various other methods and systems are also disclosed.
    Type: Grant
    Filed: November 11, 2014
    Date of Patent: July 16, 2019
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Julian Pop, Kentaro Indo, Kai Hsu
  • Patent number: 10287880
    Abstract: A downhole fluid testing system includes a downhole acquisition tool housing configured to be moved into a wellbore, where the wellbore contains fluid that comprises a native reservoir fluid of a geological formation and a contaminant. The system includes a pump to pump fluid through the downhole acquisition tool, a sensor configured to analyze portions of the fluid and obtain a fluid property the fluid from an optical spectrometer, including an optical density, and a controller coupled to the housing to receive a first plurality of measurements over time from the sensor, estimate a future saturation pressure of the fluid at specific time increments via a processor based in part on the first plurality of measurements and a saturation pressure model, and control a flow rate of the pump that causes the flow line pressure to remain above the estimated future saturation pressure plus a value of the associated uncertainty.
    Type: Grant
    Filed: March 22, 2017
    Date of Patent: May 14, 2019
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Kentaro Indo, Julian Pop, Sepand Ossia
  • Patent number: 10241030
    Abstract: An optical spectrometer includes a near black body light source, a reference detector in a first optical path and a single measurement detector in a second optical path. A sample cell including a fluid flow line may be positioned in the second optical path upstream of the measurement detector. Optical energy may be emitted at a plurality of filament temperatures and first and second sets of optical intensities measured at the reference and measurement detectors. The first and second sets of optical intensities may be processed to compute a substantially continuous transmittance spectrum of a fluid sample in the fluid flow line by inverting the acquired optical intensity measurements.
    Type: Grant
    Filed: November 30, 2012
    Date of Patent: March 26, 2019
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Kentaro Indo, Kai Hsu, Julian Pop
  • Publication number: 20180320517
    Abstract: A method includes pumping fluid from outside of a downhole tool through a flowline of the downhole tool with a pump. The method further includes taking a first plurality of measurements over time using at least one sensor and estimating a future saturation pressure of the fluid within the flowline at constant time increments via a processor based at least in part on the first plurality of measurements and a saturation pressure model. The method further includes adjusting the flowline pressure to maintain the pressure of the flowline above the estimated future saturation pressure.
    Type: Application
    Filed: November 1, 2016
    Publication date: November 8, 2018
    Inventors: Kentaro Indo, Julian J. Pop, Ji Qi, Sepand Ossia
  • Patent number: 9932824
    Abstract: A method for transmitting data from a downhole tool is provided. In one embodiment, the method includes acquiring data for a formation fluid through downhole fluid analysis with a downhole tool in a well. The acquired data can include optical spectrum data measured with a spectrometer and other data. The method also includes generating time blocks of the acquired data and transmitting the time blocks from the downhole tool. More particularly, generating the time blocks may include compressing at least some of the optical spectrum data according to a first compression technique and compressing at least some of the other data according to one or more additional compression techniques. The compressed data can be packaged into the time blocks such that at least some of the time blocks include both compressed optical spectrum data and compressed other data for the formation fluid. Additional methods, systems, and devices are also disclosed.
    Type: Grant
    Filed: October 21, 2015
    Date of Patent: April 3, 2018
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Bo Yu, Kai Hsu, Julian Pop, Kentaro Indo
  • Publication number: 20180051553
    Abstract: A method for sampling a downhole formation fluid includes pumping formation fluid into the flowline of a downhole sampling tool, measuring a saturation pressure of the formation fluid in the flowline while pumping, and adjusting the pumping rate such that the fluid pressure in the flowline remains within a predetermined threshold above the measured saturation pressure.
    Type: Application
    Filed: August 16, 2017
    Publication date: February 22, 2018
    Inventors: Kentaro Indo, Julian Pop, Maxim Yushko, Tudor Ioan Palaghita, Zeynep Alpman, Alexis Petit, Sepand Ossia, Tullio Moscato
  • Publication number: 20170362936
    Abstract: A method for sampling a downhole formation fluid includes pumping formation fluid into the flowline of a downhole sampling tool, measuring a saturation pressure of the formation fluid in the flowline while pumping, and adjusting the pumping rate such that the fluid pressure in the flowline remains within a predetermined threshold above the measured saturation pressure.
    Type: Application
    Filed: June 15, 2017
    Publication date: December 21, 2017
    Inventors: Kentaro Indo, Maxim Yushko, Tudor Ioan Palaghita, Zeynep Alpman, Alexis Petit, Julian Pop, Sepand Ossia, Tullio Moscato
  • Publication number: 20170328202
    Abstract: A method includes operating a downhole acquisition tool in a wellbore in a geological formation. The wellbore or the geological formation, or both, contain a reservoir fluid. The method also includes receiving a portion of the reservoir fluid into the downhole acquisition tool and performing downhole fluid analysis using the downhole acquisition tool in the wellbore to determine at least one measurement associated with the portion of the reservoir fluid. The at least one measurement includes fluid density, optical density, or both. The method also includes using a processor of the downhole acquisition tool to obtain compressibility of the reservoir fluid based at least in part on the fluid density, the optical density, or both and determining a composition of the reservoir fluid based at least in part on the compressibility.
    Type: Application
    Filed: May 12, 2017
    Publication date: November 16, 2017
    Inventors: Kai Hsu, Hadrien Dumont, Anthony Robert Holmes Goodwin, Kentaro Indo, Julian Pop
  • Publication number: 20170284199
    Abstract: A downhole fluid testing system includes a downhole acquisition tool housing configured to be moved into a wellbore, where the wellbore contains fluid that comprises a native reservoir fluid of a geological formation and a contaminant. The system includes a pump to pump fluid through the downhole acquisition tool, a sensor configured to analyze portions of the fluid and obtain a fluid property the fluid from an optical spectrometer, including an optical density, and a controller coupled to the housing to receive a first plurality of measurements over time from the sensor, estimate a future saturation pressure of the fluid at specific time increments via a processor based in part on the first plurality of measurements and a saturation pressure model, and control a flow rate of the pump that causes the flow line pressure to remain above the estimated future saturation pressure plus a value of the associated uncertainty.
    Type: Application
    Filed: March 22, 2017
    Publication date: October 5, 2017
    Inventors: Kentaro Indo, Julian Pop, Sepand Ossia
  • Publication number: 20170284198
    Abstract: A method includes positioning a downhole acquisition tool in a well-logging device in a wellbore in a geological formation, where the wellbore or the geological formation, or both contain a reservoir fluid. The method includes performing downhole fluid analysis using a downhole acquisition tool in the wellbore to determine a plurality of fluid properties associated with the reservoir fluid. The method includes generating a nonlinear predictive control model representative of the plurality of fluid properties based at least in part on the downhole fluid analysis. The method includes adjusting the nonlinear predictive control model based at least in part on an output representative of a pump flow control sequence at a first time interval and the plurality of fluid properties.
    Type: Application
    Filed: March 22, 2017
    Publication date: October 5, 2017
    Inventors: Julian Pop, Vianney Bruned, Kentaro Indo, Sepand Ossia, Steven G. Villareal
  • Patent number: 9733389
    Abstract: A downhole sampling tool is operated to obtain formation fluid from a subterranean formation, which then flows through a flowline of the downhole sampling tool. Real-time density and optical density sensors of the downhole sampling tool are co-located proximate the flowline. Contamination of the formation fluid in the flowline is then determined based, at least in part, on the real-time density and optical density measurements obtained utilizing the co-located sensors.
    Type: Grant
    Filed: December 20, 2012
    Date of Patent: August 15, 2017
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Kai Hsu, Julian J. Pop, Kentaro Indo
  • Patent number: 9650892
    Abstract: Optical spectral data associated with a formation fluid flowing through a downhole formation fluid sampling apparatus is obtained. Based on the obtained optical spectra data, a plurality of measures each relating the formation fluid to a corresponding one of a plurality of different fluid types are estimated. Blending coefficients each corresponding to a different one of the different fluid types are determined and utilized with the predetermined mapping matrices, each corresponding to a different one of the different fluid types, to obtain a blended mapping matrix. A parameter of the formation fluid is then predicted based on a projection of the obtained spectral data onto the blended mapping matrix.
    Type: Grant
    Filed: December 17, 2014
    Date of Patent: May 16, 2017
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Kentaro Indo, Kai Hsu, Julian J. Pop
  • Publication number: 20170114634
    Abstract: A method for transmitting data from a downhole tool is provided. In one embodiment, the method includes acquiring data for a formation fluid through downhole fluid analysis with a downhole tool in a well. The acquired data can include optical spectrum data measured with a spectrometer and other data. The method also includes generating time blocks of the acquired data and transmitting the time blocks from the downhole tool. More particularly, generating the time blocks may include compressing at least some of the optical spectrum data according to a first compression technique and compressing at least some of the other data according to one or more additional compression techniques. The compressed data can be packaged into the time blocks such that at least some of the time blocks include both compressed optical spectrum data and compressed other data for the formation fluid. Additional methods, systems, and devices are also disclosed.
    Type: Application
    Filed: October 21, 2015
    Publication date: April 27, 2017
    Inventors: Bo Yu, Kai Hsu, Julian Pop, Kentaro Indo
  • Patent number: 9612154
    Abstract: A method for analyzing the condition of a spectrometer is provided. In one embodiment, the method includes acquiring optical data from a spectrometer of a downhole tool during flushing of a flowline and selecting a data set from the acquired optical data. The method can also include estimating light scattering and optical drift for the spectrometer based on the selected data set and determining impacts of the estimated light scattering and optical drift for the spectrometer on measurement accuracy of a characteristic of a downhole fluid determinable through analysis of the downhole fluid using the spectrometer. Additional methods, systems, and devices are also disclosed.
    Type: Grant
    Filed: December 19, 2014
    Date of Patent: April 4, 2017
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Kentaro Indo, Alexis Petit, Vivek Agarwal, Sepand Ossia, Julian J. Pop, Kai Hsu