Patents by Inventor Sathish Sankaran
Sathish Sankaran 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: 11972183Abstract: Fluid flow dynamics modeling methods and system are provided. In some embodiments, such methods include determining a bottomhole pressure for the unconventional reservoir based, at least in part, on a tubing head pressure for one or more wells penetrating at least a portion of the unconventional reservoir, one or more fluid properties of a fluid in the unconventional reservoir, and a well production volume for the one or more wells; determining a Productivity Index (PI) for the unconventional reservoir, based, at least in part, on the one or more fluid properties and measured well data for the one or more wells, wherein the measured well data includes a well production rate and a well flowing pressure; and determining a fluid depletion of the unconventional reservoir based, at least in part, on the bottomhole pressure and the PI.Type: GrantFiled: November 2, 2022Date of Patent: April 30, 2024Assignee: Xecta Intelligent Production ServicesInventors: Sathish Sankaran, Diego Molinari, Wenyue Sun, Sanjay Paranji
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Publication number: 20230342413Abstract: A method of determining average reservoir pressure for a subterranean formation is provided. The method includes shutting in a well in the subterranean formation; measuring a plurality of buildup pressures during a period of time wherein the well is shut in via a downhole pressure gauge; performing an eigen expansion of the plurality of buildup pressures to generate a plurality of eigenvalues; determining an estimated average reservoir pressure based, at least in part, on the plurality of eigenvalues; and producing fluids from the well based, at least in part, on the estimated average reservoir pressure.Type: ApplicationFiled: January 4, 2023Publication date: October 26, 2023Inventors: Sathish Sankaran, Wenyue Sun, Masahiro Nagao
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Patent number: 11767750Abstract: An apparatus for estimating a gas-oil ratio for a well in an unconventional reservoir comprises a processor associated with a control system. The processor is configured to determine a bottomhole pressure for the well. The processor is further configured to determine one or more pressure, volume, and temperature (PVT) properties associated with fluid flow and to determine transient well performance. The processor is further configured to determine a Productivity Index (PI) for the well for a plurality of time steps and to determine an inflection point. The processor is further configured to estimate the gas-oil ratio of the well after the inflection point based on the determined transient well performance and to perform the fluid production rate forecast based on the determined PI. The processor is further configured to apply the fluid production rate forecast to the estimated gas-oil ratio to determine an instantaneous gas-oil ratio.Type: GrantFiled: December 7, 2022Date of Patent: September 26, 2023Assignee: Xecta Intelligent Production ServicesInventors: Sathish Sankaran, Hardikkumar Zalavadia, Utkarsh Sinha
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Publication number: 20230059014Abstract: Fluid flow dynamics modeling methods and system are provided. In some embodiments, such methods include determining a bottomhole pressure for the unconventional reservoir based, at least in part, on a tubing head pressure for one or more wells penetrating at least a portion of the unconventional reservoir, one or more fluid properties of a fluid in the unconventional reservoir, and a well production volume for the one or more wells; determining a Productivity Index (PI) for the unconventional reservoir, based, at least in part, on the one or more fluid properties and measured well data for the one or more wells, wherein the measured well data includes a well production rate and a well flowing pressure; and determining a fluid depletion of the unconventional reservoir based, at least in part, on the bottomhole pressure and the PI.Type: ApplicationFiled: November 2, 2022Publication date: February 23, 2023Inventors: Sathish Sankaran, Diego Molinari, Wenyue Sun, Sanjay Paranji
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Patent number: 11514216Abstract: Fluid flow dynamics modeling methods and system are provided. In some embodiments, such methods include determining a bottomhole pressure for the unconventional reservoir based, at least in part, on a tubing head pressure for one or more wells penetrating at least a portion of the unconventional reservoir, one or more fluid properties of a fluid in the unconventional reservoir, and a well production volume for the one or more wells; determining a Productivity Index (PI) for the unconventional reservoir, based, at least in part, on the one or more fluid properties and measured well data for the one or more wells, wherein the measured well data includes a well production rate and a well flowing pressure; and determining a fluid depletion of the unconventional reservoir based, at least in part, on the bottomhole pressure and the PI.Type: GrantFiled: December 30, 2021Date of Patent: November 29, 2022Assignee: XECTA INTELLIGENT PRODUCTION SERVICESInventors: Sathish Sankaran, Diego Molinari, Wenyue Sun, Sanjay Paranji
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Patent number: 11501043Abstract: Fluid flow dynamics modeling methods and system are provided. In some embodiments, such methods include providing an initial fluid system model including a plurality of nodes, each node characterized by one or more node fluid system parameters; and a plurality of edges between two of the plurality of nodes, each edge characterized by one or more edge fluid system parameters; and using the initial fluid system model, determining an updated fluid system model using a history-matching process.Type: GrantFiled: August 6, 2021Date of Patent: November 15, 2022Assignee: Xecta Intelligent Production ServicesInventors: Sathish Sankaran, Wenyue Sun, Sanjay Paranji
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Publication number: 20220147674Abstract: Fluid flow dynamics modeling methods and system are provided. In some embodiments, such methods include providing an initial fluid system model including a plurality of nodes, each node characterized by one or more node fluid system parameters; and a plurality of edges between two of the plurality of nodes, each edge characterized by one or more edge fluid system parameters; and using the initial fluid system model, determining an updated fluid system model using a history-matching process.Type: ApplicationFiled: August 6, 2021Publication date: May 12, 2022Inventors: Sathish Sankaran, Wenyue Sun, Sanjay Paranji
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Patent number: 10354207Abstract: Systems and methods for optimization of real time production operations. In one embodiment, a moving time horizon based parametric model provides fast predictions for production optimization in a short-term framework. In another embodiment, multiple technologies are selected in connection with asset performance workflows that are uniquely implemented in a multi-phase approach.Type: GrantFiled: May 1, 2012Date of Patent: July 16, 2019Assignee: Landmark Graphics CorporationInventors: Gerardo Mijares, Alejandro Garcia, Sathish Sankaran, Jose Rodriguez, Luigi Saputelli, Ankur Awasthi, Michael Nikolaou
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Patent number: 8396826Abstract: Systems and methods for optimization of real time production operations. In one embodiment, a moving time horizon based parametric model provides fast predictions for production optimization in a short-term framework. In another embodiment, multiple technologies are selected in connection with asset performance workflows that are uniquely implemented in a multi-phase approach.Type: GrantFiled: December 17, 2008Date of Patent: March 12, 2013Assignee: Landmark Graphics CorporationInventors: Gerardo Mijares, Alejandro Garcia, Sathish Sankaran, Jose Rodriguez, Luigi Saputelli, Ankur Awasthi, Michael Nikolaou
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Publication number: 20120215502Abstract: Systems and methods for optimization of real time production operations. In one embodiment, a moving time horizon based parametric model provides fast predictions for production optimization in a short-term framework. In another embodiment, multiple technologies are selected in connection with asset performance workflows that are uniquely implemented in a multi-phase approach.Type: ApplicationFiled: May 1, 2012Publication date: August 23, 2012Applicant: Landmark Graphics CorporationInventors: Gerardo Mijares, Alejandro Garcia, Sathish Sankaran, Jose Rodriguez, Luigi Saputelli, Ankur Awasthi, Michael Nikolaou
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Publication number: 20090157590Abstract: Systems and methods for optimization of real time production operations. In one embodiment, a moving time horizon based parametric model provides fast predictions for production optimization in a short-term framework. In another embodiment, multiple technologies are selected in connection with asset performance workflows that are uniquely implemented in a multi-phase approach.Type: ApplicationFiled: December 17, 2008Publication date: June 18, 2009Applicant: Landmark Graphics Corporation, a Halliburton CompanyInventors: Gerardo Mijares, Alejandro Garcia, Sathish Sankaran, Jose Rodriguez, Luigi Saputelli, Ankur Awasthi, Michael Nikolaou
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Patent number: 7006918Abstract: A method for the measurement of the stresses and pressure perturbations surrounding a well, and a system for computing the optimum location for initiating a hydraulic stress fracture. The technique includes using sensors attached to the wellbore casing connected to a data analyzer. The analyzer is capable of analyzing the stresses on the well system. Using an inverse problem framework for an open-hole situation, the far field stresses and well departure angle are determined once the pressure perturbations and stresses are measured on the wellbore casing. The number of wellbore measurements needed for the inverse problem solution also is determined. The technique is also capable of determining the optimal location for inducing a hydraulic fracture, the effect of noisy measurements on the accuracy of the results, and assessing the quality of a bond between a casing and a sealant.Type: GrantFiled: November 10, 2004Date of Patent: February 28, 2006Assignee: University of HoustonInventors: Michael J. Economides, Wolfgang F. J. Deeg, Peter Valko, Michael Nikolaou, Sathish Sankaran
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Publication number: 20050234648Abstract: A method for the measurement of the stresses and pressure perturbations surrounding a well, and a system for computing the optimum location for initiating a hydraulic stress fracture. The technique includes using sensors attached to the wellbore casing connected to a data analyzer. The analyzer is capable of analyzing the stresses on the well system. Using an inverse problem framework for an open-hole situation, the far field stresses and well departure angle are determined once the pressure perturbations and stresses are measured on the wellbore casing. The number of wellbore measurements needed for the inverse problem solution also is determined. The technique is also capable of determining the optimal location for inducing a hydraulic fracture, the effect of noisy measurements on the accuracy of the results, and assessing the quality of a bond between a casing and a sealant.Type: ApplicationFiled: November 10, 2004Publication date: October 20, 2005Applicant: University of HoustonInventors: Michael Economides, Wolfgang Deeg, Peter Valko, Michael Nikolaou, Sathish Sankaran
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Patent number: 6834233Abstract: A system and method for the measurement of the stresses and pressure perturbations surrounding a well, and a system for computing the optimum location for initiating a hydraulic stress fracture. The technique includes using sensors attached to the wellbore casing connected to a data analyzer. The analyzer is capable of analyzing the stresses on the well system. Using an inverse problem framework for an open-hole situation, the far field stresses and well departure angle are determined once the pressure perturbations and stresses are measured on the wellbore casing. The number of wellbore measurements needed for the inverse problem solution also is determined. The technique is also capable of determining the optimal location for inducing a hydraulic fracture, the effect of noisy measurements on the accuracy of the results, and assessing the quality of a bond between a casing and a sealant.Type: GrantFiled: February 8, 2002Date of Patent: December 21, 2004Assignee: University of HoustonInventors: Michael J. Economides, Wolfgang F. J. Deeg, Peter Valko, Michael Nikolaou, Sathish Sankaran
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Publication number: 20030150263Abstract: A system and method for the measurement of the stresses and pressure perturbations surrounding a well, and a system for computing the optimum location for initiating a hydraulic stress fracture. The technique includes using sensors attached to the wellbore casing connected to a data analyzer. The analyzer is capable of analyzing the stresses on the well system. Using an inverse problem framework for an open-hole situation, the far field stresses and well departure angle are determined once the pressure perturbations and stresses are measured on the wellbore casing. The number of wellbore measurements needed for the inverse problem solution also is determined. The technique is also capable of determining the optimal location for inducing a hydraulic fracture, the effect of noisy measurements on the accuracy of the results, and assessing the quality of a bond between a casing and a sealant.Type: ApplicationFiled: February 8, 2002Publication date: August 14, 2003Inventors: Michael J. Economides, Wolfgang F.J. Deeg, Peter Valko, Michael Nikolaou, Sathish Sankaran