Patents by Inventor Raghu Ramamoorthy
Raghu Ramamoorthy 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: 10247849Abstract: Methods and systems are described for using pulsed neutron ?-ray spectroscopy to measure formation water salinity from within a borehole. Through generating a cross-plot of database values of ratios of spectroscopically determined yields of hydrogen (H) and chlorine (Cl) from two detectors, deriving apparent salinities therefrom, formation and borehole water salinities can be determined.Type: GrantFiled: September 16, 2012Date of Patent: April 2, 2019Assignees: SCHLUMBERGER TECHNOLOGY CORPORATION, SAUDI ARABIAN OIL COMPANYInventors: Harold Pfutzner, James A. Grau, Nancy J. Fruhman, Raghu Ramamoorthy, Shouxiang Ma
-
Patent number: 9534481Abstract: Measuring a parameter characteristic of a formation in an oil well with a device configured to generate a sensing field within a volume of the formation and cause a flow through the volume in the presence of the sensing field. The device also comprises sensors responsive to changes in the volume, which indicate existent amounts of fluid, such as hydrocarbon and water saturations and irreducible hydrocarbon and water saturations. Measurements may be made before the flow affects the measuring volume and after onset of the flow through the measuring volume.Type: GrantFiled: June 8, 2015Date of Patent: January 3, 2017Assignee: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Cosan Ayan, Fikri John Kuchuk, Terizhandur S. Ramakrishnan, Thomas J. Neville, Raghu Ramamoorthy, Andrew J. Carnegie
-
Patent number: 9322948Abstract: A method of measuring a formation parameter in the process of drilling a well penetrating the rock formation is disclosed. A section of the well is provided with a drill string comprising a drilling bit at its distal end; a first fluid is circulated through the drilling bit and invades the rock formation; a formation evaluation tool mounted onto the drill string is used to measure the formation parameter; the formation parameter is used to select the time at which a second fluid is circulated through the drilling bit; such that the second fluid alters the response of the rock formation to the formation evaluation tool; the second fluid is circulated through the drilling bit to start invading the formation; and the formation evaluation tool is used to repeat the measure of the formation parameter while circulating the second fluid.Type: GrantFiled: March 7, 2012Date of Patent: April 26, 2016Assignees: Schlumberger Technology Corporation, Saudi Aramco Oil CompanyInventors: Raghu Ramamoorthy, Edward Alan Clerke
-
Publication number: 20150267521Abstract: Measuring a parameter characteristic of a formation in an oil well with a device configured to generate a sensing field within a volume of the formation and cause a flow through the volume in the presence of the sensing field. The device also comprises sensors responsive to changes in the volume, which indicate existent amounts of fluid, such as hydrocarbon and water saturations and irreducible hydrocarbon and water saturations. Measurements may be made before the flow affects the measuring volume and after onset of the flow through the measuring volume.Type: ApplicationFiled: June 8, 2015Publication date: September 24, 2015Inventors: Cosan Ayan, Fikri John Kuchuk, Terizhandur S. Ramakrishnan, Thomas J. Neville, Raghu Ramamoorthy, Andrew J. Carnegie
-
Patent number: 9051822Abstract: Measuring a parameter characteristic of a formation in an oil well with a device configured to generate a sensing field within a volume of the formation and cause a flow through the volume in the presence of the sensing field. The device also comprises sensors responsive to changes in the volume, which indicate existent amounts of fluid, such as hydrocarbon and water saturations and irreducible hydrocarbon and water saturations. Measurements may be made before the flow affects the measuring volume and after onset of the flow through the measuring volume.Type: GrantFiled: April 15, 2009Date of Patent: June 9, 2015Assignee: Schlumberger Technology CorporationInventors: Cosan Ayan, Fikri John Kuchuk, Terizhandur S. Ramakrishnan, Thomas J. Neville, Raghu Ramamoorthy, Andrew J. Carnegie
-
Publication number: 20140343857Abstract: Methods and systems are described for using pulsed neutron ?-ray spectroscopy to measure formation water salinity from within a bore-hole. Through generating a cross-plot of database values of ratios of spectroscopically determined yields of hydrogen (H) and chlorine (Cl) from two detectors, deriving apparent salinities therefrom, formation and borehole water salinities can be determined.Type: ApplicationFiled: September 16, 2012Publication date: November 20, 2014Applicants: SAUDI ARAMCO OIL COMPANY, SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Harold Pfutzner, James A. Grau, Ronald E. Plasek, Raghu Ramamoorthy, S. Mark Ma
-
Patent number: 8720552Abstract: An apparatus and method of measuring a parameter characteristic of a rock formation in an oil well is provided with a device for generating a sensing field within a volume of the rock formation and a device for causing a flow through the volume in the presence of the sensing field, further including sensors responsive to changes in the volume, wherein a sensor response is indicative of the amounts of fluid, particularly hydrocarbon and water saturations and irreducible hydrocarbon and water saturations. Measurements can be made before the flow affects the measuring volume and after onset of the flow through the measuring volume.Type: GrantFiled: October 3, 2011Date of Patent: May 13, 2014Assignee: Schlumberger Technology CorporationInventors: Cosan Ayan, Fikri John Kuchuk, Terizhandur S. Ramakrishnan, Thomas J. Neville, Raghu Ramamoorthy, Andrew Carnegie
-
Patent number: 8593140Abstract: Evaluating a formation by lowering a downhole tool in a wellbore penetrating the formation, injecting a fluid into the formation at an injection zone via the downhole tool, and using a formation evaluation sensor to perform a measurement at each of a plurality of locations in the wellbore each proximate the injection zone. At least two of the plurality of measurements are compared, and a formation property is determined based on the comparison.Type: GrantFiled: October 30, 2008Date of Patent: November 26, 2013Assignee: Schlumberger Technology CorporationInventors: Pablo Saldungaray, Edward Harrigan, Bernard Montaron, Raghu Ramamoorthy
-
Publication number: 20130233619Abstract: A method of measuring a formation parameter in the process of drilling a well penetrating the rock formation is disclosed. A section of the well is provided with a drill string comprising a drilling bit at its distal end; a first fluid is circulated through the drilling bit and invades the rock formation; a formation evaluation tool mounted onto the drill string is used to measure the formation parameter; the formation parameter is used to select the time at which a second fluid is circulated through the drilling bit; such that the second fluid alters the response of the rock formation to the formation evaluation tool; the second fluid is circulated through the drilling bit to start invading the formation; and the formation evaluation tool is used to repeat the measure of the formation parameter while circulating the second fluid.Type: ApplicationFiled: March 7, 2012Publication date: September 12, 2013Inventors: RAGHU RAMAMOORTHY, EDWARD ALAN CLERKE
-
Publication number: 20130057277Abstract: A method for determining surface relaxivity of a rock formation in a wellbore includes using measurements of nuclear magnetic resonance properties of the rock formation made from within a wellbore penetrating the rock formations includes determining nuclear magnetic relaxation properties from the measurements of the nuclear magnetic resonance properties. A diffusion property of the rock formation is determined from the measurements of the nuclear magnetic resonance properties. The surface relaxivity of the rock formation is determined from the relaxation properties and the diffusion property. The surface relaxivity and other nuclear magnetic resonance properties are used to infer wettability and/or fluid saturation of the rock formations.Type: ApplicationFiled: January 21, 2011Publication date: March 7, 2013Inventors: Lukasz Zielinski, Martin D. Hürlimann (Hurlimann), Philip Singer, Raghu Ramamoorthy
-
Patent number: 8297354Abstract: An apparatus and method of measuring a parameter characteristic of a rock formation in an oil well is provided with a device for generating a sensing field within a volume of the rock formation and a device for causing a flow through the volume in the presence of the sensing field, further including sensors responsive to changes in the volume, wherein a sensor response is indicative of the amounts of fluid, particularly hydrocarbon and water saturations and irreducible hydrocarbon and water saturations. Measurements can be made before the flow affects the measuring volume and after onset of the flow through the measuring volume.Type: GrantFiled: April 15, 2008Date of Patent: October 30, 2012Assignee: Schlumberger Technology CorporationInventors: Cosan Ayan, Fikri John Kuchuk, Terizhandur S. Ramakrishnan, Thomas J. Neville, Raghu Ramamoorthy, Andrew Carnegie
-
Publication number: 20120043078Abstract: A method of testing the performance of a stimulation fluid by placing a sample of the stimulation fluid or a precursor thereof into the body of a downhole tool, positioning the tool in juxtaposition with a rock face at a downhole location, forming a sealing contact between the rock face and the tool; and injecting the sample into the rock face while monitoring pressure and/or flow rates during the injection of the sample into and/or production of formation fluid from the rock face to derive a measure of the effectiveness of the stimulation fluid in creating openings in the rock face.Type: ApplicationFiled: August 18, 2010Publication date: February 23, 2012Applicant: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Murtaza Ziauddin, Raghu Ramamoorthy, Bernard A. Montaron
-
Publication number: 20120024523Abstract: An apparatus and method of measuring a parameter characteristic of a rock formation in an oil well is provided with a device for generating a sensing field within a volume of the rock formation and a device for causing a flow through the volume in the presence of the sensing field, further including sensors responsive to changes in the volume, wherein a sensor response is indicative of the amounts of fluid, particularly hydrocarbon and water saturations and irreducible hydrocarbon and water saturations. Measurements can be made before the flow affects the measuring volume and after onset of the flow through the measuring volume.Type: ApplicationFiled: October 3, 2011Publication date: February 2, 2012Applicant: Schlumberger Technology CorporationInventors: Cosan Ayan, Fikri John Kuchuk, Terizhandur S. Ramakrishnan, Thomas J. Neville, Raghu Ramamoorthy, Andrew Carnegie
-
Publication number: 20110284227Abstract: Measuring a parameter characteristic of a formation in an oil well with a device configured to generate a sensing field within a volume of the formation and cause a flow through the volume in the presence of the sensing field. The device also comprises sensors responsive to changes in the volume, which indicate existent amounts of fluid, such as hydrocarbon and water saturations and irreducible hydrocarbon and water saturations. Measurements may be made before the flow affects the measuring volume and after onset of the flow through the measuring volume.Type: ApplicationFiled: April 15, 2009Publication date: November 24, 2011Inventors: Cosan Ayan, Fikri John Kuchuk, Terizhandur Ramakrishnan, Thomas J. Neville, Raghu Ramamoorthy, Andrew J. Camegie
-
Patent number: 7999542Abstract: A method of measuring a parameter characteristic of a rock formation in an oil well is provided for evaluating a reservoir treatment applied to a subterranean formation including the steps of injecting from a tool body suspended into a well at an injection location a known volume of fluid into the formation, performing a logging operation sensitive to a change of fluid content at several measuring points below and above the injection location; and using results of the logging operation to determine a depth profile along said well of a parameter related to fluid content.Type: GrantFiled: April 30, 2009Date of Patent: August 16, 2011Assignee: Schlumberger Technology CorporationInventors: Raghu Ramamoorthy, David C. Bradley, Cosan Ayan
-
Publication number: 20100277166Abstract: A method of measuring a parameter characteristic of a rock formation in an oil well is provided for evaluating a reservoir treatment applied to a subterranean formation including the steps of injecting from a tool body suspended into a well at an injection location a known volume of fluid into the formation, performing a logging operation sensitive to a change of fluid content at several measuring points below and above the injection location; and using results of the logging operation to determine a depth profile along said well of a parameter related to fluid content.Type: ApplicationFiled: April 30, 2009Publication date: November 4, 2010Applicant: Schlumberger Technology CorporationInventors: Raghu Ramamoorthy, David C. Bradley, Cosan Ayan
-
Publication number: 20100264915Abstract: Evaluating a formation by lowering a downhole tool in a wellbore penetrating the formation, injecting a fluid into the formation at an injection zone via the downhole tool, and using a formation evaluation sensor to perform a measurement at each of a plurality of locations in the wellbore each proximate the injection zone. At least two of the plurality of measurements are compared, and a formation property is determined based on the comparison.Type: ApplicationFiled: October 30, 2008Publication date: October 21, 2010Inventors: Pablo Saldungaray, Edward Harrigan, Barnard Montaron, Raghu Ramamoorthy
-
Publication number: 20090255669Abstract: An apparatus and method of measuring a parameter characteristic of a rock formation in an oil well is provided with a device for generating a sensing field within a volume of the rock formation and a device for causing a flow through the volume in the presence of the sensing field, further including sensors responsive to changes in the volume, wherein a sensor response is indicative of the amounts of fluid, particularly hydrocarbon and water saturations and irreducible hydrocarbon and water saturations. Measurements can be made before the flow affects the measuring volume and after onset of the flow through the measuring volume.Type: ApplicationFiled: April 15, 2008Publication date: October 15, 2009Applicant: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Cosan Ayan, Fikri John Kuchuk, Terizhandur S. Ramakrishnan, Thomas J. Neville, Raghu Ramamoorthy, Andrew Carnegie
-
Patent number: 7062072Abstract: A method of producing images of formations surrounding a borehole, comprises: obtaining values of a first parameter in the borehole as a function of depth and azimuth at a first resolution; obtaining values of a second parameter in the borehole as a function of depth only at a second resolution; establishing a relationship between the first and second parameters at a matched resolution; using the relationship to derive values of the second parameter as a function of depth and azimuth; and producing an image of the second parameter as a function of depth and azimuth using the derived values of the second parameter.Type: GrantFiled: April 11, 2003Date of Patent: June 13, 2006Assignee: Schlumberger Technology CorporationInventors: Hervé Anxionnaz, Jean-Pierre Delhomme, Raghu Ramamoorthy
-
Patent number: 6816787Abstract: A visualization application will generate a Virtual Core representing a compilation of any formation property data, the compilation being a 2 and 1/2 D representation of any formation property. The compilation is generated by creating, in response to an integrated formation evaluation in 1D, a 2 and 1/2 D representation of each 1D formation property in the 1D formation evaluation, when the 1D property can be related to the 2 and 1/2 D physical magnitude combining the 2 and 1/2 D physical magnitude image with the 1D facies log thereby generating a 2 and 1/2 D facies image. The Software will also generate a Virtual Plug representing an average estimate of all formation properties over a prescribed surface or volume in the vicinity of a selection made on the compilation (i.e., on the Virtual Core). When an interaction with the Virtual Core occurs, all results generated by those interactions will be restored.Type: GrantFiled: March 31, 2003Date of Patent: November 9, 2004Assignee: Schlumberger Technology CorporationInventors: Raghu Ramamoorthy, Ashok Srivastava, Amr Essawi, William Dean Gibson