Patents by Inventor Julian Pop

Julian Pop 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: 10309885
    Abstract: A method for contamination monitoring includes measuring water based mud filtrate density and resistivity at downhole conditions, logging properties of a downhole fluid to find at least a resistivity and a density of a fluid sample at the downhole conditions, establishing a linear relationship between a water based mud filtrate conductivity at downhole conditions and the water based mud filtrate density at the downhole conditions, determining a density and a resistivity for native formation water, estimating a density for water based mud filtrate using the linear relationship between conductivity and density, and estimating a water based mud filtrate contamination.
    Type: Grant
    Filed: November 20, 2013
    Date of Patent: June 4, 2019
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Youxiang Zuo, Adriaan Gisolf, Julian Pop, Oliver Mullins, Chetankumar Desai
  • 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: 20180171791
    Abstract: Apparatus and methods for obtaining initial settings of station-specific parameters descriptive of wellbore/formation properties specific to downhole pressure test stations, and obtaining initial settings of station-shared parameters descriptive of petrophysical properties of petrophysically unique formation zones. A pressure transient model of the zones is obtained by regression utilizing the pressure data of each station and the initial settings of the station-specific and station-shared parameters. The regression analytically determines a model value of at least one of the station-specific parameters and the station-shared parameters.
    Type: Application
    Filed: December 11, 2017
    Publication date: June 21, 2018
    Inventors: Julian Pop, Cosan Ayan, Adriaan Gisolf, Juan Miguel La Retta Marin, Hua Yu, Lei Jiang, Youxiang Zuo
  • Publication number: 20180119547
    Abstract: A method includes positioning a downhole acquisition tool in a wellbore in a geological formation. The method includes operating a pump module to gather information for a fluid outside of the downhole acquisition tool that enters the downhole acquisition tool from a first flowline, a second flowline, or both while the downhole acquisition tool is within the wellbore. Operating the pump module includes controlling a valve assembly to a first valve configuration that enables the fluid to flow into the downhole tool via the first flowline fluidly coupled to a first pump module.
    Type: Application
    Filed: October 23, 2017
    Publication date: May 3, 2018
    Inventors: Miroslav Slapal, Christopher Albert Babin, Daniel Palmer, Kai Hsu, Anthony Robert Holmes Goodwin, Julian Pop, Nathan Mathew Landsiedel, Adriaan Gisolf
  • 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
  • Patent number: 9822776
    Abstract: Various methods for detecting and accounting for the effects of half-stroking by a pump are provided. In one embodiment, a method includes operating a pump of a downhole tool to pump fluid from a formation through the downhole tool and determining pressure differentials between a formation pressure and pressure of the fluid within the downhole tool. The pressure differentials for each of a forward stroke and reverse stroke of the pump can be summed and then compared to enable identification of onset of half-stroking by the pump. Additional systems, devices, and methods are also disclosed.
    Type: Grant
    Filed: August 20, 2014
    Date of Patent: November 21, 2017
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventor: Julian Pop
  • 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
  • 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
  • Publication number: 20160369628
    Abstract: Formation fluid sample container apparatus are described. An example apparatus includes a downhole tool having a body including an opening and a cavity extending into the body from the opening. The sample container includes an elongated container for holding a formation fluid sample and a sheath coupled to an outer surface of the elongated container and at least partially surrounding the elongated container. The sample container is fixed in the cavity and the sheath is to increase the mechanical integrity of the elongated container in a downhole environment.
    Type: Application
    Filed: August 29, 2016
    Publication date: December 22, 2016
    Inventors: Steven G. Villareal, Kent David Harms, Jeremy Murphy, Julian Pop, Dale Meek
  • Patent number: 9453408
    Abstract: A system includes a downhole formation fluid sampling tool and a processor. An optical spectrometer of the downhole formation fluid sampling tool is able to measure an optical characteristic of a formation fluid flowing through the downhole formation fluid sampling tool over a plurality of wavelengths. The optical spectrometer generates optical spectra data indicative of this optical characteristic. The processor is designed to receive the optical spectra data generated by the optical spectrometer and to estimate a formation volume factor of the formation fluid based on the optical spectra data.
    Type: Grant
    Filed: August 17, 2015
    Date of Patent: September 27, 2016
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Kentaro Indo, Kai Hsu, Julian Pop
  • Patent number: 9441425
    Abstract: A drilling system includes a first section of a drilling tool having a collar configured to hold internal components of the first section. The drilling system also includes a second section of the drilling tool configured to be coupled with the first section in a specific orientation relative to the first section. The second section is interchangeable with at least one different section.
    Type: Grant
    Filed: October 16, 2012
    Date of Patent: September 13, 2016
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Steven G. Villareal, Julian Pop, Kent David Harms, Jeremy Murphy, Albert Hoefel, Thomas W. Palmer, II
  • Patent number: 9441481
    Abstract: A method for identifying the type of a sampled formation fluid, such as a hydrocarbon, is provided. In one embodiment, the method includes measuring absorbance by a sample of a formation fluid at multiple wavelengths of electromagnetic radiation with a spectrometer. The method also includes distinguishing between multiple fluid types to identify a fluid type of the sample most likely to match an actual fluid type of the sample based on the measured absorbance at two or more wavelengths of the multiple wavelengths. Additional systems, devices, and methods are also disclosed.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: September 13, 2016
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Kentaro Indo, Julian Pop, Kai Hsu
  • Patent number: 9347314
    Abstract: A system includes a downhole formation fluid sampling tool. The system also includes an optical spectrometer of the downhole formation fluid sampling tool and a processor. The optical spectrometer is able to measure an optical characteristic of a formation fluid flowing through the downhole formation fluid sampling tool over a plurality of wavelengths. The optical spectrometer is designed to generate optical spectra data indicative of the optical characteristic. The processor is able to receive the optical spectra data generated by the optical spectrometer, to predict a parameter corresponding to one component of multiple components of the formation fluid based on the optical spectra data, and to calculate an uncertainty in the predicted parameter based on the optical spectra data.
    Type: Grant
    Filed: June 7, 2013
    Date of Patent: May 24, 2016
    Assignee: Schlumberger Technology Corporation
    Inventors: Kentaro Indo, Kai Hsu, Julian Pop
  • Patent number: 9347299
    Abstract: A tool to be used within a wellbore including a wall, the wellbore extending through a formation including formation fluid, includes a first packer and a second packer. The first packer includes a packer port to enable formation fluid flow through the first packer, with the second packer spaced from the first packer. The first packer and the second packer are expandable to abut the wellbore wall to form an interval within the wellbore between the first packer and the second packer, in which the tool further includes an interval port in fluid communication with the interval.
    Type: Grant
    Filed: December 20, 2013
    Date of Patent: May 24, 2016
    Assignee: Schlumberger Technology Corporation
    Inventors: Adriaan Gisolf, Nathan Landsiedel, Pierre-Yves Corre, Ashers Partouche, Julian Pop, Beatriz E. Barbosa, Cosan Ayan, George C. Tevis
  • Patent number: 9334729
    Abstract: Obtaining in-situ optical spectral data associated with a formation fluid flowing through a downhole formation fluid sampling apparatus, and predicting a parameter of the formation fluid flowing through the downhole formation fluid sampling apparatus based on projection of the obtained spectral data onto a matrix that corresponds to a predominant fluid type of the formation fluid.
    Type: Grant
    Filed: October 4, 2012
    Date of Patent: May 10, 2016
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Kentaro Indo, Kai Hsu, Julian Pop