Attacking Formation Patents (Class 166/307)
  • Patent number: 11174425
    Abstract: The present invention relates to a carbonate reservoir filtration-loss self-reducing acid fracturing method.
    Type: Grant
    Filed: June 24, 2020
    Date of Patent: November 16, 2021
    Assignee: SOUTHWEST PETROLEUM UNIVERSITY
    Inventors: Weiyu Chen, Liqiang Zhao, Zhifeng Luo, Juan Du, Pingli Liu, Nianyin Li, Kun Xu
  • Patent number: 11015110
    Abstract: A method of reducing corrosion of a metal surface comprises contacting a fluoride ion-containing acidic fluid with a corrosion inhibitor composition before the fluoride ion-containing acidic fluid contacts the metal surface, the corrosion inhibitor composition comprising a zirconium compound, an antimony compound, or a combination comprising at least one of the foregoing; and exposing the metal surface to the fluoride ion-containing acidic fluid.
    Type: Grant
    Filed: November 15, 2018
    Date of Patent: May 25, 2021
    Assignee: BAKER HUGHES, A GE COMPANY, LLC
    Inventors: Sandra L. Berry, Dustin Palm
  • Patent number: 10954432
    Abstract: Described herein are methods for on the fly mixing of retarded acidizing fluids containing acid, a water-soluble acid retarding agent (RA), and optionally a viscoelastic surfactant (VES), and for on the fly mixing of diversion fluids containing VES and RA in the same equipment. Also described are methods of controlling the preparation of such fluids based on feedback composition analyses.
    Type: Grant
    Filed: August 31, 2016
    Date of Patent: March 23, 2021
    Assignee: Schlumberger Technology Corporation
    Inventors: Mohan Kanaka Raju Panga, Christopher Daeffler, Andrey Yakovlev
  • Patent number: 10947441
    Abstract: The method includes a step of introducing into the reservoir, via a well, a mixture comprising a scale inhibitor, a first scale precursor and a second scale precursor. The first and second scale precursors can react together to form scale. The first scale precursor may be an ammonium salt. The method can further comprise a step of stopping the introduction into the reservoir of the mixture and shutting in the well for 2-24 hours, and a step of introducing into the reservoir a further mixture comprising a scale inhibitor, a first and second scale precursor which can react together to form scale. The steps of stopping and resuming the introduction of mixtures may be repeated at least once. The components of the mixtures may be provided as concentrated solutions and diluted in a stream of water prior to being introduced into the reservoir. The method provides an effective way of generating a barrier to fluid flow in a reservoir. The method may be a method of abandoning an entire well in a reservoir.
    Type: Grant
    Filed: June 4, 2018
    Date of Patent: March 16, 2021
    Assignee: Aubin Limited
    Inventors: Patrick Joseph Collins, Lindsay Anne Wylie
  • Patent number: 10947446
    Abstract: A dual-phase acid-based fracturing composition with corrosion inhibitors and method for use in acid-based matrix and fracturing operations in oil and gas wells is provided. The composition includes an acid, a hydrocarbon, a hydrocarbon-soluble corrosion inhibitor, an acid-soluble corrosion inhibitor, and an acid-soluble inhibitor aid.
    Type: Grant
    Filed: May 13, 2019
    Date of Patent: March 16, 2021
    Assignee: Saudi Arabian Oil Company
    Inventors: Saleh H. Al-Mutairi, Yaser K. Al-Duailej, Ibrahim S. Al-Yami, Abdullah M. Al-Hajri, Hameed H. Al-Badairy
  • Patent number: 10934468
    Abstract: The present application provides an aqueous fluid containing a gas-generating compound such as an azo compound, a hydrazide compound, or a semicarbazide compound. The aqueous fluid may also contain an amine compound, an oxidizer, or viscosifier, and a foaming surfactant. The aqueous composition may be storable at pH of less than about 5 without any appreciable gas generation, and may be activated to produce gas when mixed with a wellbore fluid for use in downhole applications.
    Type: Grant
    Filed: March 3, 2020
    Date of Patent: March 2, 2021
    Assignee: Saudi Arabian Oil Company
    Inventor: B. Raghava Reddy
  • Patent number: 10907087
    Abstract: A method for isolating a first region and a proximate second region of a subterranean formation is disclosed that includes introducing an asphaltene composition into the first region of the subterranean formation, the asphaltene composition including asphaltene dissolved in a solvent, and after introducing the asphaltene composition, introducing an aqueous composition to the first region to precipitate the asphaltene in the first region. The precipitated asphaltene forms a barrier that isolates the second region from at least a portion of the first region.
    Type: Grant
    Filed: February 15, 2018
    Date of Patent: February 2, 2021
    Assignee: Saudi Arabian Oil Company
    Inventors: Ahmad Noor Al-Deen Rizq, Badr H. Zahrani
  • Patent number: 10829681
    Abstract: The present disclosure discloses a modified nano-silica plugging agent, a water-based drilling fluid, and a preparation method and use thereof.
    Type: Grant
    Filed: January 14, 2020
    Date of Patent: November 10, 2020
    Assignee: SOUTHWEST PETROLEUM UNIVERSITY
    Inventors: Yang Bai, Pingya Luo, Yan Cheng, Cheng Li, Hao Zhang, Guojun Li
  • Patent number: 10822534
    Abstract: In one embodiment, a retarded acid system comprises an aqueous acid and a retarding surfactant. The aqueous acid may comprise from 5 wt. % to 25 wt. % of a strong acid, that is, an acid having a Ka greater than or equal to 0.01. The aqueous acid may further comprise from 75 wt. % to 95 wt. % water. The retarding surfactant may have the general chemical formula R—(OC2H4)X—OH where R is a hydrocarbon having from 11 to 15 carbon atoms and x is an integer from 6 to 10. The retarding surfactant may have a hydrophilic-lipophilic balance from 8 to 16.
    Type: Grant
    Filed: April 28, 2017
    Date of Patent: November 3, 2020
    Assignee: Saudi Arabian Oil Company
    Inventors: Abdullah Al-Yami, Vikrant Wagle, Ali Safran
  • Patent number: 10801305
    Abstract: Embodiments relate to removing residue from a well bore and well bore equipment with a treatment fluid composition, and in some embodiments, to treatment fluid compositions that comprise nanoparticles. An embodiment provides a method of removing drilling fluid residue from the surfaces of well equipment. The method comprising: applying a solid nanoparticle film to at least a portion of the surfaces of the well equipment with a treatment fluid comprising solid nanoparticles; and allowing the solid nanoparticles to interact with the surfaces of the well equipment and the drilling fluid residue adhered to the surfaces of the well equipment to remove at least a portion of the drilling fluid residue from the surfaces of the well equipment.
    Type: Grant
    Filed: August 8, 2018
    Date of Patent: October 13, 2020
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Lee Jeremy Hall, Philip Wayne Livanec, Alan William Marr
  • Patent number: 10781358
    Abstract: Cleaning composition for use in cleaning wellbore walls, tubing or casing comprising: (i) from about 5% to 100% by weight of a mixture M consisting of from 10% to 50% by weight of acetophenone, from 5% to 30% by weight of butyl glycol and from 40% to 80% by weight of a surfactant, and (ii) from 0% to 95% by weight of water, in which (i)+(ii) sum up for at least 85% by weight of the cleaning composition; and process for cleaning a wellbore wall.
    Type: Grant
    Filed: February 17, 2018
    Date of Patent: September 22, 2020
    Assignee: Lamberti SPA
    Inventors: Luigi Merli, Letizia Privitera, Lorenzo Giardini, Pierangelo Pirovano, Giovanni Floridi, Giuseppe LiBassi
  • Patent number: 10738232
    Abstract: A mixture comprising: a) from 0% to 95% of aromatic compounds and/or polycyclic aromatic compounds, said polycyclic aromatic compounds, if present, always being in an amount less than 10% with respect to component (a); b) from 0% to 85% of a mixture containing aliphatic compounds and a content of aromatic compounds lower than 30% with respect to (b); c) from 0% to 20% of an acetate component; d) from 1% to 50% of a mixture of compounds containing keto groups; with the proviso that said solvent mixture contains at least three components, one of which is (d) and the other two selected from (a), (b) or (c) and that their sum is always 00%; and with the proviso that said mixture has a solubility, measured with the Hansen parameters, characterized in that the dispersion force component of the solubility ?d varies from 17 to 20 Mpa{circumflex over (?)}0.5 the polar force component of the solubility ?p varies from 0.65 to 5 Mpa{circumflex over (?)}0.
    Type: Grant
    Filed: April 1, 2016
    Date of Patent: August 11, 2020
    Assignees: Versalis S.P.A., Eni S.P.A.
    Inventors: Alessandro Casalini, Attilio Arienti, Dario Ghidoni, Chiara Cecilia Piseri
  • Patent number: 10723641
    Abstract: A method for treating hydrogen sulfide in a solution includes providing the solution containing hydrogen sulfide. The method also includes adding sodium nitrite to the solution in an amount suitable to react with the hydrogen sulfide and treat the hydrogen sulfide.
    Type: Grant
    Filed: August 22, 2018
    Date of Patent: July 28, 2020
    Assignee: United Laboratories International, LLC
    Inventors: Jack G. Frost, Kenneth J. Snyder, Jr.
  • Patent number: 10717922
    Abstract: A method and a composition for stimulating oil production from wells which have ceased production by pumping in a mixture of gluconic, oxalic and citric acids, isopropanol, ethylene glycol and sodium citrate between pre-flush and over-flush intervals, which composition and method does not include the use of hydrochloric acid or hydrofluoric acid.
    Type: Grant
    Filed: May 13, 2009
    Date of Patent: July 21, 2020
    Inventors: Abdullah Al-Dhafeeri, Nader M. Obeid
  • Patent number: 10696891
    Abstract: Methods including (a) introducing an invert microemulsified acid (“IMA”) treatment fluid into a subterranean formation at a rate and pressure sufficient to create or enhance a fracture in a first treatment interval therein, wherein the IMA treatment fluid comprises a surfactant, a non-aqueous external phase, and aqueous dispersed phase droplets, and wherein the non-aqueous external phase further comprises micro-proppant particulates and at least a portion of the aqueous dispersed phase droplets further comprise an acid; (b) destabilizing the IMA treatment fluid in the fracture, thereby exposing the acid, wherein the micro-proppant particulates form a proppant pack in the fracture and the acid etches a channel in the fracture and/or adjacent to the fracture.
    Type: Grant
    Filed: July 8, 2014
    Date of Patent: June 30, 2020
    Assignee: HALLIBURTON ENERGY SERVICES, INC.
    Inventors: Loan K. Vo., Philip D. Nguyen
  • Patent number: 10697282
    Abstract: Formulations and methods for remediating subterranean-formed metal-polymer complexes in wells in subterranean formations are described. In one embodiment, the method includes injecting a metal-polymer complex remediation mixture containing a metal complexing agent into a subterranean formation adjacent to a well at a pressure below the fracture pressure of the formation. A sufficient contact time is allowed and then the metal-polymer complex remediation mixture is pumped from the subsurface. This has been shown to remediate polymer-containing, subterranean-formed metal-polymer complexes in shale formations. Without being held to a particular theory, it appears that the metal complexing agent is forming metal complexes with the metals in the complexes, and particularly divalent metal ions. This removal of naturally occurring metals may be un-crosslinking and causing the metal-polymer complexes to go into solution, thereby removing the blockages caused by the metal-polymer complexes.
    Type: Grant
    Filed: December 19, 2018
    Date of Patent: June 30, 2020
    Assignees: Flex-Chem Holding Company, LLC, Cimarex Energy Co
    Inventors: Andrew Bryce Conway, Robert Easterly
  • Patent number: 10669818
    Abstract: The invention is a method for operating a hydrocarbon deposit by injection of gas in foam form, comprising determining a model of displacement of the foam which is a function of an optimal mobility reduction factor of the gas and at least one interpolation function dependent on a parameter and constants to be calibrated. The mobility reduction factor of the gas is determined and the constants of at least one interpolation function are calibrated from experimental measurements comprising injections of gas in non-foaming form and in foam form into a sample of the deposit for different values of the parameter relative to the function being considered. Measurements of headloss corresponding to each value of the parameter of the interpolation function are considered. The calibration of the constants is performed interpolation function by interpolation function.
    Type: Grant
    Filed: July 31, 2017
    Date of Patent: June 2, 2020
    Assignee: IFP Energies nouvelles
    Inventors: Bernard Bourbiaux, Christophe Preux, Lahcen Nabzar, Benjamin Braconnier
  • Patent number: 10655442
    Abstract: Methods of performing a stimulation operation at a wellsite are disclosed. The wellsite is positioned about a subterranean formation having a wellbore therethrough and zones thereabout. The method involves establishing at least one objective for stimulating production of reservoir fluid from the subterranean formation and into the wellbore. The stimulating involves placing a stimulating fluid along the zones of the wellbore. The objective is based on wellsite data. The method also involves identifying at least one constraint for the stimulating, determining target distributions of the stimulation fluid based on the objective(s) and the constraint(s), and selecting operational parameters for the stimulating based on the constraint(s) and the target distributions. The method may also involve stimulating the subterranean formation using the target distributions and the operational parameters, monitoring the wellsite during the stimulating, and adjusting the stimulating based on the monitoring.
    Type: Grant
    Filed: December 28, 2012
    Date of Patent: May 19, 2020
    Assignee: Schlumberger Technology Corporation
    Inventors: Bruno Lecerf, Pierre Ramondenc, Philippe Michel Jacques Tardy
  • Patent number: 10648313
    Abstract: A process for producing hydrocarbon material from a subterranean formation comprising: injecting a first conditioning material, via a wellbore, to effect fracturing of a subterranean formation such that a hydraulically fractured formation, including an induced fracture, is obtained; after the fracturing, injecting post-fracturing conditioning material, via the wellbore, into hydraulically fractured formation; and after the injecting of the post-fracturing conditioning material, producing, via the wellbore, hydrocarbon material from the hydraulically fractured formation; wherein: the pressure of the post-fracturing conditioning material is less than the pressure of the injected fracturing fluid; and the post-fracturing conditioning material includes proppant.
    Type: Grant
    Filed: May 14, 2018
    Date of Patent: May 12, 2020
    Assignee: CNOOC PETROLEUM NORTH AMERICA ULC
    Inventors: Roberto Aguilera, Karthik Selvan
  • Patent number: 10619085
    Abstract: Embodiments provide a method for controlled release of a cement additive for use in a wellbore. The method includes the steps of mixing an aramide capsule with a cement slurry to form an additive-containing slurry, and introducing the additive-containing slurry into the wellbore. The aramide capsule is formed by interfacial polymerization where an aramide polymer forms a semi-permeable membrane encapsulating the cement additive.
    Type: Grant
    Filed: December 21, 2018
    Date of Patent: April 14, 2020
    Assignee: SAUDI ARABIAN OIL COMPANY
    Inventor: Elizabeth Q. Contreras
  • Patent number: 10611950
    Abstract: A process includes growing NRB in a nitrate reducing bacteria media to form a NRB culture and combining the NRB culture with a concentrated nitrate solution to form a NRB composition.
    Type: Grant
    Filed: July 9, 2018
    Date of Patent: April 7, 2020
    Assignee: BIOTECHNOLOGY SOLUTIONS, LLC
    Inventors: Edward Corrin, Michael Gurecki, Michael Harless
  • Patent number: 10604696
    Abstract: The invention relates to in-situ acidizing processes that involve the dissolution of an acid-soluble material. Treatment fluids have been identified that can effectively dissolve acid-soluble materials at low temperatures, such as temperatures of 30° C. or lower. In some embodiments, the processes may also be usefully employed at higher temperatures. The processes and treatment fluids of the invention can advantageously be used to dissolve acid-soluble materials, including filter cakes, in underground formations.
    Type: Grant
    Filed: January 12, 2015
    Date of Patent: March 31, 2020
    Assignee: Cleansorb Limited
    Inventors: Ralph Edmund Harris, Duncan Holdsworth
  • Patent number: 10577529
    Abstract: A process includes injecting a molybdate or molybdate salt into a hydrocarbon-bearing formation, wherein no biocide is injected into the formation.
    Type: Grant
    Filed: July 9, 2018
    Date of Patent: March 3, 2020
    Assignee: BIOSUITE, LLC
    Inventors: Edward Corrin, Michael Gurecki, Michael Harless
  • Patent number: 10501687
    Abstract: A polymer-encapsulated mineral acid solution and a method for forming the polymer-encapsulated mineral acid solution. Introducing a strong mineral acid solution to a monomer solution occurs such that a primary emulsion that is a water-in-oil type emulsion forms. Introducing the primary emulsion to a second aqueous solution forms a secondary emulsion that is a water-in-oil-in-water type double emulsion. The monomer in the secondary emulsion is cured such a polymerized shell forms that encapsulates the strong mineral acid solution and forms the capsule. The strong mineral acid solution has up to 30 wt. % strong mineral acid. A method of stimulating a hydrocarbon-bearing formation using the polymer-encapsulated mineral acid solution includes introducing a capsule suspension into a fissure in the hydrocarbon-bearing formation to be stimulated through a face in a well bore. The capsule is maintained within the fissure until the polymer shell degrades.
    Type: Grant
    Filed: March 10, 2017
    Date of Patent: December 10, 2019
    Assignees: Aramco Services Company, RTI International
    Inventors: Leah M. Johnson, Ghaithan Al-Muntasheri, Ginger Denison Rothrock, Sarah Sheperd
  • Patent number: 10494567
    Abstract: A recoverable instant thickening acid and its reusing method is usable for the recycling and reusing of a gas well carbonate reservoir acidizing fluid and production stimulation operation. The recoverable instant thickening acid includes the following components in weight percentage: 1.5-3 parts of a thickener, 0.5-3 parts of potassium chloride and 100 parts of a hydrochloric acid solution, wherein the thickener is a mixture composed of a mass ratio of 40%-70% of N-lauryl-N?-hydroxyethyl-N?-hydroxypropyl ethylenediamine propionate or its derivatives, 4%-12% of ethanol and 18%-56% of water. With the thickening acid for performing an acidizing treatment, the residual acid solution can be re-prepared as a thickening acid for an acidizing treatment without a chemical treatment, assisting the green and environmentally friendly production and sustainable development of gas fields.
    Type: Grant
    Filed: May 8, 2015
    Date of Patent: December 3, 2019
    Assignee: CHINA NATIONAL PETROLEUM CORPORATION CHUANQING DRILLING ENGINEERING COMPANY LIMITED CHANGQING DOWNHOLE TECHNOLOGY COMPANY
    Inventors: Hu Sun, Zuwen Wang, Mian Zhang, Yan Gao, Xiuli Shao, Jing Li, Gaihong Wang, Dongrui Yuan, Zhiming Jing, Junfang Xu
  • Patent number: 10428263
    Abstract: A method of treating a subsurface formation comprises mixing an unfractionated hydrocarbon mixture with a foaming agent to form a waterless stimulation fluid comprising foam. The unfractionated hydrocarbon mixture comprises ethane, propane, butane, isobutane, and pentane plus. The method further includes increasing a pressure of the stimulation fluid and injecting the stimulation fluid into the subsurface formation.
    Type: Grant
    Filed: November 21, 2016
    Date of Patent: October 1, 2019
    Assignee: LINDE AKTIENGESELLSCHAFT
    Inventors: John A. Babcock, Charles P. Siess, III
  • Patent number: 10385259
    Abstract: Treatment methods and treatment fluids for increasing permeability of organic shale formations are described herein. The treatment method includes treating an organic shale formation with a treatment fluid. The treatment fluid includes a solvent that dissolves bitumen in the shale formation. After treating the shale formation with the treatment fluid, oil is recovered from the shale formation. By removing bitumen from pores and pore throats within the formation, the solvent increases permeability of the formation and allows mobile oil to flow more easily through the formation.
    Type: Grant
    Filed: August 7, 2014
    Date of Patent: August 20, 2019
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: George Waters, Richard Lewis, Erik Rylander, Andrew E. Pomerantz, Ridvan Akkurt, Roderick Bovee, Syed A. Ali
  • Patent number: 10329477
    Abstract: A dual-phase acid-based fracturing composition with corrosion inhibitors and method for use in acid-based matrix and fracturing operations in oil and gas wells is provided. The composition includes an acid, a hydrocarbon, a hydrocarbon-soluble corrosion inhibitor, an acid-soluble corrosion inhibitor, and an acid-soluble inhibitor aid.
    Type: Grant
    Filed: January 8, 2018
    Date of Patent: June 25, 2019
    Assignee: Saudi Arabian Oil Company
    Inventors: Saleh H. Al-Mutairi, Yaser K. Al-Duailej, Ibrahim S. Al-Yami, Abdullah M. Al-Hajri, Hameed H. Al-Badairy
  • Patent number: 10316240
    Abstract: Methods for treating a zone of a subterranean formation penetrated by a wellbore comprising: (A) introducing an acidizing fluid into the zone of the subterranean formation; (B) forming a treatment fluid comprising: (i) a first chemical having: (a) a single epoxy group; and (b) at least one alkoxy group on a silicon atom, wherein the first chemical is water soluble or dissolves with hydrolysis in an aqueous phase; and (ii) a second chemical having an amine group, wherein the second chemical is water soluble or dissolves with hydrolysis in an aqueous phase; and (C) introducing the treatment fluid through the wellbore into the zone of the subterranean formation. In various embodiments, the treatment fluid has a viscosity of less than 5 cP measured at a shear rate of 511 sec?1.
    Type: Grant
    Filed: December 9, 2013
    Date of Patent: June 11, 2019
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Prajakta Ratnakar Patil, Shoy George Chittattukara, Philip D. Nguyen
  • Patent number: 10294412
    Abstract: The present invention includes processes to create wormholes in carbonate reservoirs by contacting a formation with a solution comprising glutamic acid N,N-diacetic acid (GLDA) and/or a salt thereof, methylglycine-N,N-diacetic acid (MGDA) and/or a salt thereof, or a combination thereof. The present invention also includes processes to remove wellbore damage in a carbonate reservoir by contacting a damaged zone of the carbonate reservoir with a solution comprising GLDA and/or a salt thereof, methylglycine-N,N-diacetic acid (MGDA) and/or a salt thereof, or a combination thereof. The present invention further includes solutions comprising a salt and further comprising GLDA and/or a salt thereof, methylglycine-N,N-diacetic acid (MGDA) and/or a salt thereof, or a combination thereof.
    Type: Grant
    Filed: August 21, 2015
    Date of Patent: May 21, 2019
    Assignee: AKZO NOBEL CHEMICALS INTERNATIONAL B.V.
    Inventors: Cornelia Adriana de Wolf, Hisham Nasr-El-Din, James N. LePage, Mohamed Ahmed Nasr-El-Din Mahmoud, Johanna Hendrika Bemelaar
  • Patent number: 10260337
    Abstract: A method for determining one or more parameters of a formation fracture comprises injecting a viscous fluid in the formation via a flow path; measuring pressure at a location along the flow path; and calculating one or more parameters of a formation fracture based on the measured pressure. The method may permit improved and/or more efficient planning, design and/or performance of, e.g. conformance treatment of the formation fracture.
    Type: Grant
    Filed: October 30, 2014
    Date of Patent: April 16, 2019
    Assignee: MAERSK OLIE GAS A/S
    Inventors: Hans Van Dongen, Joris De Iongh
  • Patent number: 10253249
    Abstract: Methods for treating subterranean wells in which the producing formation is a carbonate comprise preparing a treatment fluid comprising either: (a) an aqueous solution of a multivalent-cation reacting polymer; (b) a solution comprising a fatty acid and an ethanolamine; (c) an aqueous acidic solution of one or more compounds whose calcium salts are insoluble; or (d) an aqueous solution comprising urea or alkane derivatives thereof or both and polyvinylpyrrolidone (PVP). The treatment fluid is placed in the well such that the solution contacts the carbonate formation at a pressure lower than the fracturing pressure. The treatment fluid is allowed to react with the carbonate formation, thereby depositing a film onto the formation surface or part of the formation surface. Then an acid solution is placed in the well such that the acid contacts the carbonate formation at a pressure lower than the fracturing pressure.
    Type: Grant
    Filed: August 1, 2014
    Date of Patent: April 9, 2019
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Li Jiang, Bruno Lecerf, Connor Coley, Philip Sullivan, Brent Busby, Jeremy Bedard
  • Patent number: 10252303
    Abstract: This present invention is directed to a method to remediate soil and groundwater. Embodiments of the present invention can be conducted ex-situ within the footprint of the area to be remediated. The method utilizes hydrogen peroxide.
    Type: Grant
    Filed: June 1, 2016
    Date of Patent: April 9, 2019
    Inventors: Michael Lindstrom, James Dawe
  • Patent number: 10240445
    Abstract: A fracturing fluid viscosity-controlling agent maintains the high viscosity of the fracturing fluid during fracture formation in hydraulic fracturing and reduces the viscosity during recovery of the fracturing fluid. A fracturing fluid which includes the viscosity-controlling agent is provided as well as a crude oil or natural gas drilling method using the fracturing fluid with the viscosity-controlling agent. This viscosity-controlling agent contains polyalkylene oxide and a viscosity-reducing agent and is in the form of a tablet.
    Type: Grant
    Filed: June 9, 2014
    Date of Patent: March 26, 2019
    Assignee: Sumitomo Seika Chemicals Co., Ltd.
    Inventors: Toru Ido, Noboru Yamaguchi
  • Patent number: 10208243
    Abstract: This present application relates generally to enhancing flow of fluids during fracturing operations. More specifically, the application relates to providing a proppant with a low surface energy, introducing the proppant into a subterranean formation with a surfactant selected to interact with the proppant such that the recovery of hydrocarbons from the subterranean formation is enhanced.
    Type: Grant
    Filed: March 12, 2015
    Date of Patent: February 19, 2019
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Jody Marie Burks, Ali Alwattari, Tatyana V Khamatnurova
  • Patent number: 10202834
    Abstract: This disclosure describes formulations and methods for remediating subterranean-formed metal-polymer complexes in wells in subterranean formations. In one embodiment, the method includes injecting a metal-polymer complex remediation mixture containing a metal complexing agent into a subterranean formation adjacent to a well at a pressure below the fracture pressure of the formation. A sufficient contact time is allowed and then the metal-polymer complex remediation mixture is pumped from the subsurface. This has been shown to remediate polymer-containing, subterranean-formed metal-polymer complexes in shale formations. Without being held to a particular theory it appears that the metal complexing agent is forming metal complexes with the metals in the complexes, and particularly divalent metal ions. This removal of naturally occurring metals may be un-crosslinking and causing the metal-polymer complexes to go into solution, thereby removing the blockages caused by the metal-polymer complexes.
    Type: Grant
    Filed: October 27, 2014
    Date of Patent: February 12, 2019
    Assignees: Flex-Chem Holding Company, LLC, Cimarex Energy Company
    Inventors: Andrew Bryce Conway, Robert Easterly
  • Patent number: 10180046
    Abstract: A flow control apparatus is provided for deployment downhole as part of a wellbore string. The flow control apparatus includes a flow control member having a screened portion for filtering debris from reservior fluid that is incoming into the wellbore.
    Type: Grant
    Filed: December 22, 2015
    Date of Patent: January 15, 2019
    Assignee: NCS MULTISTAGE INC.
    Inventors: Michael John Werries, John Edward Ravensbergen, Don Getzlaf, Doug Brunskill, Nick Getzlaf
  • Patent number: 10155899
    Abstract: A suspension for removing hydrocarbons from a subterranean formation includes a fluid comprising at least one of water, brine, steam, carbon dioxide, a light hydrocarbon, and an organic solvent; and a plurality of nanoparticles dispersed with the fluid. Nanoparticles of the plurality comprise silica and carbon. A method includes forming a plurality of nanoparticles and dispersing the plurality of nanoparticles with a fluid to form a suspension comprising the nanoparticles. A method of recovering a hydrocarbon material includes introducing a suspension into a subterranean formation containing hydrocarbons, forming a stabilized emulsion of the suspension and the hydrocarbons within the subterranean formation; and removing the emulsion from the subterranean formation. The suspension comprises a plurality of nanoparticles, and at least some nanoparticles of the plurality comprise silica and carbon.
    Type: Grant
    Filed: June 19, 2015
    Date of Patent: December 18, 2018
    Assignee: Baker Hughes Incorporated
    Inventors: Devesh Kumar Agrawal, Sankaran Murugesan, Valery N. Khabashesku
  • Patent number: 10107082
    Abstract: Fracture monitoring and characterization of a subterranean fracturing process is described. Hydraulic fracturing conditions intended to induce tensile crack opening or compressional crack closure of a fracture responsible for a microseismic event in the Earth formation are selected and a hydraulic fracturing operation is performed using the selected conditions to cause tensile crack opening or compressional crack closure of the fracture responsible for a microseismic event in the Earth formation. Induced motion data from the microseismic event is received using a plurality of receivers, and the received data is analyzed to track the development of the fracture responsible for the microseismic event and/or to track a proppant distribution within the fracture.
    Type: Grant
    Filed: July 8, 2013
    Date of Patent: October 23, 2018
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Ahyi Kim, Jean Desroches, Ian Bradford
  • Patent number: 10100242
    Abstract: The present invention relates to a method for enhanced hydrocarbon recovery in an underground reservoir rock comprising injecting an aqueous conditioning solution containing an alkaline agent, wherein the in-situ effects of the injection are determined by means of a flow simulation on a reservoir model discretized in cells, by taking into account the transport of the alkaline agent and without taking into account the transport of species referred to as intermediate species that result from the injection of the principal agent in aqueous solution, the intermediate species concentrations being determined analytically in each cell.
    Type: Grant
    Filed: November 24, 2011
    Date of Patent: October 16, 2018
    Assignee: IFP ENERGIES NOUVELLES
    Inventors: Bernard Bourbiaux, Quang Long Nguyen
  • Patent number: 10047593
    Abstract: In one possible implementation, fresh hydrochloric acid or (partially) spent hydrochloric acid can be pressurized by a pressure source. The pressurized acid from the acid source is injected into a wellbore during an acidizing operation. In addition, a carbon dioxide source may be provided. Acid from the acid source is combined with carbon dioxide from the carbon dioxide source, and the combined acid and carbon dioxide, pressurized by the pressure source, are injected into the wellbore during the acidizing operation. A processor located at the earth's surface or downhole may be provided. The processor can monitor the relative proportions of carbon dioxide and acid in the acid/carbon dioxide combination, as well as the pressure of the acid/carbon dioxide combination at an injection site in the wellbore. Acidizing operation management decisions can be made based on the monitored relative proportions and/or the monitored pressure.
    Type: Grant
    Filed: May 22, 2015
    Date of Patent: August 14, 2018
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Xiangdong Qiu, Stephen Dyer
  • Patent number: 10047278
    Abstract: A fracturing fluid composition that includes a chelating agent, e.g. GLDA, and a polymeric additive comprising a copolymer of acrylamido-tert-butyl sulfonate and hydrolyzed polyacrylamide diluted in an aqueous base fluid, e.g. seawater, and a method of fracking a geological formation using the fracturing fluid composition. Various embodiments of the fracturing fluid composition and the method of fracking are also provided.
    Type: Grant
    Filed: March 15, 2017
    Date of Patent: August 14, 2018
    Assignee: King Fahd University of Petroleum and Minerals
    Inventors: Mohamed Ahmed Nasr El-Din Mahmoud, Salah El-Din Elkatatny, Marwan Nagm Eldeen Mohammad
  • Patent number: 10005945
    Abstract: A drilling fluid adjusting agent using a PVA-based resin capable of contributing to the reduction of hydration swelling of bentonite even in the presence of salts; and a drilling fluid using the same are provided. The drilling fluid adjusting agent contains a PVA containing 1,2-diol structural unit in a side chain thereof. The drilling fluid adjusting agent has excellent solubility even in the presence of salts such as potassium ion, and also has excellent reduction of hydration swelling of bentonite.
    Type: Grant
    Filed: December 26, 2014
    Date of Patent: June 26, 2018
    Assignee: THE NIPPON SYNTHETIC CHEMICAL INDUSTRY CO.. LTD.
    Inventors: Shusaku Mandai, Hiroki Takeda
  • Patent number: 9975790
    Abstract: A method of depleting the bacterial content in a water source is provided. The method involves depleting the bacterial content in a water source for a water flooding process, said method comprising contacting a water source with a superparamagnetic or paramagnetic nanoparticle; complexing the bacteria with the particle; and removing the bacteria-particle complex by applying a magnetic field so as to provide a water source with depleted bacterial content. The depleted water can then be pumped into one or more connecting injection well(s) in an oil field pushing the crude oil towards one or more production well(s) thereby allowing for enhanced oil recovery from the production wells.
    Type: Grant
    Filed: September 30, 2014
    Date of Patent: May 22, 2018
    Assignee: MAERSK OLIE OG GAS A/S
    Inventors: Martin Vad Bennetzen, Kristian Mogensen
  • Patent number: 9963630
    Abstract: The method for well-stimulation through a wellbore in a rock formation is hydraulic fracturing under high temperature conditions. The method includes injecting a fracturing fluid system to the rock formation; fracturing the rock formation at a temperature between 150-260 degrees Celsius; and recovering fluid components of the fracturing fluid system from the wellbore and setting the proppant in the fractures. The fracturing fluid system includes proppant and a plurality of fluid components. The fluid components can include water, a gelling agent, and a stabilizer made of ascorbic acid. The ascorbic acid stabilizes viscosity of the gelling agent, adjusts pH, and delays cross linking. Amount of components and additional components, such as a cross-linking agent, a breaker, another adjusting agent and an inverting surfactant adjust the fracturing fluid system for well conditions and a type of treatment to be completed.
    Type: Grant
    Filed: November 18, 2015
    Date of Patent: May 8, 2018
    Assignee: CNPC USA Corporation
    Inventors: Lulu Song, Zhenzhou Yang
  • Patent number: 9957439
    Abstract: Friction reducers for hydraulic fracturing fluids, hydraulic fracturing fluids containing the friction reducers, and methods of making and using same are disclosed. The friction reducers comprise ethylene oxide polymers, propylene oxide polymers, ethylene oxide-propylene oxide co-polymers, and combinations thereof, and can further comprise a dispersant, such as polypropylene glycol. The friction reducer formulations can be active across a wide range of brine salinities, and tolerant of high levels of divalent cations in solution. The friction reducers can have a cloud point temperature, above which temperature they can precipitate out of solution and deposit on a surface of a hydrocarbon-bearing formation to inhibit hydration of the shale formations lining the fractures.
    Type: Grant
    Filed: December 4, 2015
    Date of Patent: May 1, 2018
    Assignee: BOARD OF REGENTS, THE UNIVERSITY OF TEXAS SYSTEM
    Inventors: Eric van Oort, John David Downs
  • Patent number: 9938800
    Abstract: Methods and systems for determining acidizing fluid injection rates for stimulation of a subterranean formation arc provided. In one embodiment, methods comprise: selecting a first injection rate for injecting an acidizing fluid into a subterranean formation; calculating a first objective function based on the first injection rate; selecting a second injection rate for injecting the acidizing fluid into the subterranean formation; calculating a second objective function based on the second injection rate; comparing the second objective function with the first objective function to determine whether the second objective function is indicative of more effective stimulation, less effective stimulation, or the same stimulation as the first objective function; and selecting a design rate for injecting the acidizing fluid into the subterranean formation.
    Type: Grant
    Filed: June 2, 2015
    Date of Patent: April 10, 2018
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Chaitanya Mallikarjun Karale, Prabhat Kumar Srivastava, Ankit Bhatnagar
  • Patent number: 9909087
    Abstract: In one embodiment, a cleaning composition includes a surfactant system having an invert structure; and at least one enzyme.
    Type: Grant
    Filed: August 29, 2012
    Date of Patent: March 6, 2018
    Assignee: METHOD PRODUCTS, PBC
    Inventors: Frederick W. Holzhauer, Kaj Johnson
  • Patent number: 9896922
    Abstract: A method, system, and apparatus required for creating a mixture of dry proppant and liquid carbon dioxide (LCO2) for fracturing oil and gas formations is presented. The operation includes making a mixture of dry proppant and liquid carbon dioxide (LCO2) for use in a fracturing operation by supplying dry proppant that is pressurized to between 75 and 600 psia with a gas; further supplying a stream of sub-cooled LCO2 having a pressure substantially equal to that of the pressurized dry proppant; and adding dry, pressurized proppant to the stream of sub-cooled LCO2, thereby forming a mixed LCO2 and proppant fracturing slurry.
    Type: Grant
    Filed: December 21, 2012
    Date of Patent: February 20, 2018
    Assignee: PRAXAIR TECHNOLOGY, INC.
    Inventors: Richard M. Kelly, Nick Joseph Degenstein, Bernard Thomas Neu
  • Patent number: 9890320
    Abstract: The presence of iron in a subterranean formation, particularly ferric iron, can be problematic during an acidizing operation due to sludge formation that can occur. Methods for treating a subterranean formation in the presence of iron can comprise: providing a treatment fluid comprising an acid and an iron stabilization agent comprising a phosphinated carboxylic acid polymer, the treatment fluid having a pH of about 3 or below and the phosphinated carboxylic acid polymer being soluble in the treatment fluid; introducing the treatment fluid into a subterranean formation; and interacting the phosphinated carboxylic acid polymer with ferric iron in the subterranean formation.
    Type: Grant
    Filed: August 20, 2013
    Date of Patent: February 13, 2018
    Assignee: HALLIBURTON ENERGY SERVICES, INC.
    Inventors: Enrique Antonio Reyes, Aaron Michael Beuterbaugh, Alyssa Lynn Smith, Christopher Lynn Smith