Patents by Inventor Ovunc Mutlu
Ovunc Mutlu 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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Publication number: 20200347722Abstract: Systems and methods for predicting an accurate in-situ stress field in a wellbore in a formation are disclosed. The in-situ stress field is calculated using an optimizing process that takes into account parameters relating to induced tensile fracture that are derived from wellbore image logs and other input data relating to the wellbore. Once values for the in-situ stress field are predicted, those values can be used to generate synthetic image logs which can then be compared to the original image logs to determine the accuracy of the results and if needed repeat the operation to obtain more accurate results.Type: ApplicationFiled: July 21, 2020Publication date: November 5, 2020Inventors: Mojtaba Pordel Shahri, Ovunc Mutlu
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Patent number: 10724365Abstract: Systems and methods for predicting an accurate in-situ stress field in a wellbore in a formation are disclosed. The in-situ stress field is calculated using an optimizing process that takes into account parameters relating to induced tensile fracture that are derived from wellbore image logs and other input data relating to the wellbore. Once values for the in-situ stress field are predicted, those values can be used to generate synthetic image logs and fracturing data which can then be compared to the original image logs and fracturing data to determine the accuracy of the results and if needed repeat the operation to obtain more accurate results.Type: GrantFiled: May 19, 2015Date of Patent: July 28, 2020Assignee: Weatherford Technology Holdings, LLCInventors: Mojtaba Pordel Shahri, Ovunc Mutlu
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Patent number: 10677959Abstract: A method of calculating the unconfined compressive strength (UCS) of subterranean rock having a borehole formed or being formed therein comprises the steps of: (a) establishing or accessing a set of input variables pertaining to characteristics of the rock and the geographical region in which the rock exists; (b) allocating to each of a plurality of mnemonic types each representing a respective UCS calculation expression and contained within a database of UCS calculation curves up to one said input variable in the form of a data element or up to one series of said input variables in the form of a data curve the allocation taking place on the basis of identity of each said input variable or data curve, as applicable, to which a said UCS calculation curve is allocated to a variable of a said UCS calculation curve (herein “curve variables”); (c) dividing the set of allocated UCS calculation curves according to one or more respective zones of the rock to which they pertain and calculating a resultant curve; (dType: GrantFiled: February 6, 2014Date of Patent: June 9, 2020Assignee: REEVES WIRELINE TECHNOLOGIES LIMITEDInventors: David Eccles, Jian Huang, Ovunc Mutlu
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Patent number: 10393904Abstract: Predicting downhole acoustic tool responses due to stress-induced anisotropy by performing at least the following: receiving a plurality of input data corresponding to at least one well site comprising a wellbore; constructing a three-dimensional geomechanical model based at least in part on the input data; creating at least one near field versus far field stress distribution that corresponds to the wellbore from the three-dimensional geomechanical model; creating, at least one near wellbore versus far-field velocity distribution using the at least one near field versus far field stress distribution; comparing the downhole acoustic tool response property that indicates a downhole acoustic tool's penetration depth for a subsurface geological formation with the near wellbore velocity fields; and flagging, where the downhole acoustic tool response property stays within the near-wellbore velocity field.Type: GrantFiled: November 6, 2015Date of Patent: August 27, 2019Assignee: Weatherford Technology Holdings, LLCInventors: Mojtaba Pordel Shahri, Jennifer Anne Market, Mohammadreza Safariforoshani, Ovunc Mutlu
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Patent number: 10227836Abstract: Systems and methods for wellbore strengthening are disclosed. An effective way to strengthen a wellbore and prevent future fractures during drilling operations is to induce fractures having a desired fracture width profile and fracture length. Surface back pressure can be used to accurately induce such fractures. The induced fractures which are then sealed can increase fracture gradient of the wellbore thus mitigating future fractures.Type: GrantFiled: April 25, 2014Date of Patent: March 12, 2019Assignee: Weatherford Technology Holdings, LLCInventors: Mojtaba Karimi, Don Hannegan, Mojtaba P. Shahri, Ovunc Mutlu
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Patent number: 10221649Abstract: The disclosure pertains to the design and implementation of a diversion procedure for geologic openings. Embodiments involve performing a screening analysis to determine if a well or formation is appropriate for stimulation. If a well is appropriate, a modeling analysis is performed to determine candidate parameters for a diversion procedure. The analysis is divided into two segments, a dry analysis of jamming and a wet and full-physics-based analysis of plugging. The jamming analysis provides candidates to the plugging analysis to reduce the work of the more intensive wet full-physics modeling.Type: GrantFiled: November 3, 2015Date of Patent: March 5, 2019Assignee: Weatherford Technology Holdings, LLCInventors: Mojtaba Pordel Shahri, Clayton S. Smith, Francisco E. Fragachan, Ovunc Mutlu
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Patent number: 10132147Abstract: Systems and methods for analyzing and designing a customized pulse fracturing operation for fracturing a wellbore in a reservoir formation are disclosed. Pulsed fracturing can create multiple fractures that radiate away from the wellbore while minimizing near wellbore damage. This network can further be extended into the reservoir by utilizing an optimized pumping rate over a predetermined amount of time. The optimized pulse rate and duration can be determined by using a geomechanical and a reservoir simulator which can help in quantifying the production efficiency of the induced fracture network.Type: GrantFiled: July 2, 2014Date of Patent: November 20, 2018Assignee: Weatherford Technology Holdings, LLCInventors: Mohammadreza Safariforoshani, Jian Huang, Sunil Lakshminarayanan, Ovunc Mutlu
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Patent number: 10001769Abstract: Systems and methods generate optimized formation fracturing operational parameters by iteratively optimizing bottom hole temperature design, perforation design, fracturing fluid pulse design, and proppant design based on formation properties, proppant properties, candidate selection, flow and geomechanical modeling, and engineering design, where the systems and methods as implemented on a digital processing unit.Type: GrantFiled: November 18, 2014Date of Patent: June 19, 2018Assignee: Weatherford Technology Holdings, LLCInventors: Jian Huang, Kedar M. Deshpande, Mohammad Reza Safariforoshani, Ovunc Mutlu, Chih-Chau Hwang, Rajesh K. Saini, Leonid Vigderman, Duane Treybig, Clayton S. Smith, Mathew M. Samuel, Kern L. Smith
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Patent number: 9803475Abstract: Systems and methods for an integrated wellbore stress, stability and strengthening analysis are disclosed. An integrated geomechanical tool can be used to analyze and evaluate stress along the length of the wellbore to identify a safe drilling mud weight window and help identify troublesome zones in the wellbore. Fracture length may then be predicted in the identified troublesome zones by using a stress tensor calculated during the stress analysis. The calculated fracture length may be used to perform a strengthening analysis. After performing strengthening analysis, mud loss may be predicted based on predicted fracture size calculated during the stress, stability and strengthening analyzes.Type: GrantFiled: April 9, 2014Date of Patent: October 31, 2017Assignee: Weatherford Technology Holdings, LLCInventors: Mojtaba P. Shahri, Mohammadreza Safariforoshani, Ovunc Mutlu, Trevor Oar, Mojtaba Karimi
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Publication number: 20170131421Abstract: Predicting downhole acoustic tool responses due to stress-induced anisotropy by performing at least the following: receiving a plurality of input data corresponding to at least one well site comprising a wellbore; constructing a three-dimensional geomechanical model based at least in part on the input data; creating at least one near field versus far field stress distribution that corresponds to the wellbore from the three-dimensional geomechanical model; creating, at least one near wellbore versus far-field velocity distribution using the at least one near field versus far field stress distribution; comparing the downhole acoustic tool response property that indicates a downhole acoustic tool's penetration depth for a subsurface geological formation with the near-wellbore velocity fields; and flagging, where the downhole acoustic tool response property stays within the near-wellbore velocity field.Type: ApplicationFiled: November 6, 2015Publication date: May 11, 2017Inventors: Mojtaba Pordel Shahri, Jennifer Anne Market, Mohammadreza Safariforoshani, Ovunc Mutlu
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Publication number: 20170124228Abstract: The disclosure pertains to the design and implementation of a diversion procedure for geologic openings. Embodiments involve performing a screening analysis to determine if a well or formation is appropriate for stimulation. If a well is appropriate, a modeling analysis is performed to determine candidate parameters for a diversion procedure. The analysis is divided into two segments, a dry analysis of jamming and a wet and full-physics-based analysis of plugging. The jamming analysis provides candidates to the plugging analysis to reduce the work of the more intensive wet full-physics modeling.Type: ApplicationFiled: November 3, 2015Publication date: May 4, 2017Inventors: Mojtaba Pordel Shahri, Clayton S. Smith, Francisco E. Fragachan, Ovunc Mutlu
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Publication number: 20160341849Abstract: Systems and methods for predicting an accurate in-situ stress field in a wellbore in a formation are disclosed. The in-situ stress field is calculated using an optimizing process that takes into account parameters relating to induced tensile fracture that are derived from wellbore image logs and other input data relating to the wellbore. Once values for the in-situ stress field are predicted, those values can be used to generate synthetic image logs and fracturing data which can then be compared to the original image logs and fracturing data to determine the accuracy of the results and if needed repeat the operation to obtain more accurate results.Type: ApplicationFiled: May 19, 2015Publication date: November 24, 2016Inventors: Mojtaba Pordel Shahri, Ovunc Mutlu
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Publication number: 20160161933Abstract: Systems and methods for designing stages that optimize production for a fracturing operation of a wellbore in a reservoir formation are disclosed. To ensure efficiency, a stage design operation generally takes into account fracture efficiency information along the length of the wellbore based on known attributes and use the efficiency information to divide the wellbore into various stages. The stage design system and method provides an automated procedure for stage design that efficiently, accurately, and with minimal human involvement partitions a wellbore along its length such that the fracture operation is optimized.Type: ApplicationFiled: December 4, 2014Publication date: June 9, 2016Inventors: Hamed Chok, Mojtaba P. Shahri, Ovunc Mutlu
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Publication number: 20160139588Abstract: Systems and methods generate optimized formation fracturing operational parameters by iteratively optimizing bottom hole temperature design, perforation design, fracturing fluid pulse design, and proppant design based on formation properties, proppant properties, candidate selection, flow and geomechanical modeling, and engineering design, where the systems and methods as implemented on a digital processing unit.Type: ApplicationFiled: November 18, 2014Publication date: May 19, 2016Inventors: Jian Huang, Kedar M. Deshpande, Mohammad Reza Safariforoshani, Ovunc Mutlu, Chih-Chau Hwang, Rajesh K. Saini, Leonid Vigderman, Duane Treybig, Clayton S. Smith, Mathew M. Samuel, Kern L. Smith
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Publication number: 20160003019Abstract: Systems and methods for analyzing and designing a customized pulse fracturing operation for fracturing a wellbore in a reservoir formation are disclosed. Pulsed fracturing can create multiple fractures that radiate away from the wellbore while minimizing near wellbore damage. This network can further be extended into the reservoir by utilizing an optimized pumping rate over a predetermined amount of time. The optimized pulse rate and duration can be determined by using a geomechanical and a reservoir simulator which can help in quantifying the production efficiency of the induced fracture network.Type: ApplicationFiled: July 2, 2014Publication date: January 7, 2016Inventors: Mohammadreza Safariforoshani, Jian Huang, Sunil Lakshminarayanan, Ovunc Mutlu
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Publication number: 20150308209Abstract: Systems and methods for wellbore strengthening are disclosed. An effective way to strengthen a wellbore and prevent future fractures during drilling operations is to induce fractures having a desired fracture width profile and fracture length. Surface back pressure can be used to accurately induce such fractures. The induced fractures which are then sealed can increase fracture gradient of the wellbore thus mitigating future fractures.Type: ApplicationFiled: April 25, 2014Publication date: October 29, 2015Applicant: Weatherford/Lamb, Inc.Inventors: Mojtaba Karimi, Don Hannegan, Mojtaba P. Shahri, Ovunc Mutlu
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Publication number: 20150292323Abstract: Systems and methods for an integrated wellbore stress, stability and strengthening analysis are disclosed. An integrated geomechanical tool can be used to analyze and evaluate stress along the length of the wellbore to identify a safe drilling mud weight window and help identify troublesome zones in the wellbore. Fracture length may then be predicted in the identified troublesome zones by using a stress tensor calculated during the stress analysis. The calculated fracture length may be used to perform a strengthening analysis. After performing strengthening analysis, mud loss may be predicted based on predicted fracture size calculated during the stress, stability and strengthening analyses.Type: ApplicationFiled: April 9, 2014Publication date: October 15, 2015Applicant: Weatherford/Lamb, Inc.Inventors: Mojtaba P. Shahri, Mohammadreza Safariforoshani, Ovunc Mutlu, Trevor Oar, Mojtaba Karimi
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Publication number: 20150219791Abstract: A method of calculating the unconfined compressive strength (UCS) of subterranean rock having a borehole formed or being formed therein comprises the steps of: (a) establishing or accessing a set of input variables pertaining to characteristics of the rock and the geographical region in which the rock exists; (b) allocating to each of a plurality of mnemonic types each representing a respective UCS calculation expression and contained within a database of UCS calculation curves up to one said input variable in the form of a data element or up to one series of said input variables in the form of a data curve the allocation taking place on the basis of identity of each said input variable or data curve, as applicable, to which a said UCS calculation curve is allocated to a variable of a said UCS calculation curve (herein “curve variables”); (c) dividing the set of allocated UCS calculation curves according to one or more respective zones of the rock to which they pertain and calculating a resultant curve; (dType: ApplicationFiled: February 6, 2014Publication date: August 6, 2015Applicant: Reeves Wireline Technologies LimitedInventors: David Eccles, Jian Huang, Ovunc Mutlu
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Patent number: 8494827Abstract: A method for predicting localized damage and naturally occurring fractures in a subsurface region is provided. This invention uses a hybrid FEM-DEM (i.e. finite-discrete element) framework combined with a fracture risking analysis and fracture initiation and propagation criteria, to model the transition of rock from a state of continuum to discontinuum. The risking analysis combines results from other natural fracture prediction tools (e.g. displacement discontinuity method, restoration analysis, curvature analysis, analytical solutions, continuum analysis) to augment FEM-DEM solutions, such as by providing remote and local boundary conditions and identifying potential regions of anticipated damage and fracturing. Natural fractures and damage information is extracted from the modeling results and may be used directly for predictions or used as input into other fracture analysis tools or techniques.Type: GrantFiled: May 21, 2010Date of Patent: July 23, 2013Assignee: ExxonMobil Upstream Research CompanyInventors: Ovunc Mutlu, Ganeswara Rao Dasari, Rodrick D. Myers
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Publication number: 20110077918Abstract: A method for predicting localized damage and naturally occurring fractures in a subsurface region is provided. This invention uses a hybrid FEM-DEM (i.e. finite-discrete element) framework combined with a fracture risking analysis and fracture initiation and propagation criteria, to model the transition of rock from a state of continuum to discontinuum. The risking analysis combines results from other natural fracture prediction tools (e.g. displacement discontinuity method, restoration analyses, curvature analysis, analytical solutions, continuum analysis) to augment FEM-DEM solutions, such as by providing remote and local boundary conditions and identifying potential regions of anticipated damage and fracturing. Natural fractures and damage information is extracted from the modeling results and may be used directly for predictions or used as input into other fracture analysis tools or techniques.Type: ApplicationFiled: May 21, 2010Publication date: March 31, 2011Inventors: Ovunc Mutlu, Ganeswara Rao Dasari, Rodrick D. Myers