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公开(公告)号：US20230092055A1
公开(公告)日：2023-03-23
申请号：US17935953
申请日：2022-09-28
摘要： The invention is directed to hydrophilic and hydrophobic superparamagnetic nanoparticles and their use as contrast agents for NMR including agents that distinguish oil and water in NMR logging of geological formations containing oil or water. Methods of making these SPIONs are also described.
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公开(公告)号：US20230060690A1
公开(公告)日：2023-03-02
申请号：US18046370
申请日：2022-10-13
IPC分类号： C09K8/92 , C09D133/26 , C09K8/03
摘要： Polyacrylamide (PAM)-coated nanosand that may be a relative permeability modifier (RPM) and that is applied to treat a wellbore in a subterranean formation. The treatment may be for excess water production. The PAM-coated nanosand is PAM-hydrogel-coated nanosand. The PAM-coated nanosand os nanosand coated with PAM hydrogel. The PAM hydrogel includes crosslinked PAM in water. Application of the PAM-coated nanosand may reduce water production from the subterranean formation into the wellbore. The PAM hydrogel of the PAM-coated nanosand may expand in a water zone of the subterranean formation to restrict water flow into the wellbore. The PAM hydrogel of the PAM-coated nanosand may contract in an oil zone of the subterranean formation so not to significantly restrict crude oil flow into the wellbore.
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公开(公告)号：US20230021923A1
公开(公告)日：2023-01-26
申请号：US17867087
申请日：2022-07-18
发明人： Mehdi Mokhtari , Prathmesh Parrikar
摘要： Disclosed herein are optical swell meters and methods for using them to measure fine-scale variations in the swelling behavior of shale specimens. In an embodiment, the optical swell meters can include: a glass imbibition chamber containing a specimen, where an imbibition fluid is located within the glass inhibition chamber and at least partially covering the specimen; a digital camera set a distance away from the chamber and facing the chamber; and a light source, where the light source illuminates the specimen. The method of using the optical swell meter can provide a swelling strain profile of the shale specimens during its interaction with the imbibition fluid.
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公开(公告)号：US11525078B2
公开(公告)日：2022-12-13
申请号：US17230229
申请日：2021-04-14
申请人： Terves Inc.
发明人： Andrew Sherman , Haixong Tang
IPC分类号： C09K8/03
摘要： A modified high density brine for use in subterranean drilling and completion operations. The modified high density brine includes the addition of high density particle addition that can optionally be surface-modified. The resultant modified high density brine eliminates the need for toxic, corrosive, and costly ZrBr2 additions or other ionic additives to boost the density of the modified high density brine to 15-17 lbs./gallon or greater.
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公开(公告)号：US11485902B2
公开(公告)日：2022-11-01
申请号：US16747449
申请日：2020-01-20
发明人： Clay Purdy , Markus Weissenberger
IPC分类号： C09K8/74 , C09K8/54 , E21B41/02 , E21B43/26 , E21B43/119 , E21B43/28 , E21B43/27 , C09K8/60 , E21B43/116 , E21B33/12 , C09K8/06 , E21B21/00 , C09K8/42 , C09K8/46 , C23F11/04 , C09K8/03
摘要： A method for the fracking or stimulation of a hydrocarbon-bearing formation, said method comprising the steps of: providing a wellbore in need of stimulation; inserting a plug in the wellbore at a predetermined location; inserting a perforating tool and a spearhead or breakdown acid into the wellbore; positioning the tool at said predetermined location; perforating the wellbore with the tool thereby creating a perforated area; allowing the spearhead acid to come into contact with the perforated area for a predetermined period of time sufficient to prepare the formation for fracking or stimulation; removing the tool from the wellbore; and initiating the fracking of the perforated area using a fracking fluid. Also disclosed is a corrosion inhibiting composition for use with the acid composition.
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公开(公告)号：US11421141B2
公开(公告)日：2022-08-23
申请号：US16854323
申请日：2020-04-21
摘要： A polymer composite hydrogel includes a polymer composite, water, an organic crosslinker, and a salt. The polymer composite includes a nanosheet filler dispersed throughout a polymerized polyacrylamide. The nanosheet filler includes one or more of zirconium hydroxide, zirconium oxide, titanium oxide, graphene oxide, non-functionalized graphene, and hexagonal boron nitride. Further, a weight ratio of the nanosheet filler to the polymerized polyacrylamide is between 1:99 and 1:9. The polymer composite hydrogel includes 0.5 to 6 weight percent of the polymer composite and 0.25 to 5 weight percent of the salt, the salt being a monovalent salt, a divalent salt, or a combination of monovalent and divalent salts. A method of preparing a polymer composite, a method of preparing a polymer composite hydrogel for water shutoff applications, and the associated method of forming a barrier to shut off or reduce unwanted production of water in a subterranean formation is also provided.
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公开(公告)号：US11407929B2
公开(公告)日：2022-08-09
申请号：US16521038
申请日：2019-07-24
发明人： Badr Ba Geri , Ibrahim Gomaa , Mohamed Mahmoud , Shirish Patil
摘要： A method is described for removing a barite-quartz and a calcite-quartz filter cake from a well bore. The method involves contacting the filter cake with a first composition comprising NH4F, NaBrO3, NH4Cl, and NaNO2. The NH4Cl and NaNO2 react exothermically, and the heat produced drives the endothermic reaction of NH4F and NaBrO3, which produces HF for dissolution of the quartz in the filter cake. Filter cake comprising barite may be further treated with a second composition comprising a converting agent and a chelating agent. Filter cake comprising calcite may be treated with a first composition having an excess of NH4Cl and NaBrO3, which react to produce HCl for calcite dissolution.
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公开(公告)号：US20220213374A1
公开(公告)日：2022-07-07
申请号：US17450900
申请日：2021-10-14
发明人： Hui Joyce Zhang , Xia Wei , Steven Young
摘要： A wellbore fluid comprising a first aqueous base fluid and a plurality of silica nanoparticles suspended in the first aqueous base fluid. The nanoparticles are present in the fluid in an amount to have an effect of decreasing a crystallization temperature by at least 4 to 55° F. as compared to a second aqueous base fluid without the silica nanoparticles.
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公开(公告)号：US11370952B2
公开(公告)日：2022-06-28
申请号：US17065001
申请日：2020-10-07
发明人： Peter J. Boul , Ashok Santra
摘要： Magnetically responsive drilling fluids and methods of using magnetically responsive drilling fluids. The magnetically responsive drilling fluids may include a drilling fluid and a plurality of superparamagnetic nanostructures disposed within the drilling fluid. The plurality of superparamagnetic nanostructures may include superparamagnetic-iron-oxide-nanoparticles (SPIONs) and carbon nanotubes (CNTs) adsorbed onto the SPIONs. The method of using the magnetically responsive drilling fluid may include introducing the magnetically responsive drilling fluid into a subsurface formation and applying a magnetic field to the magnetically responsive drilling fluid to elicit a rheological change in the magnetically responsive drilling fluid.
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公开(公告)号：US11370951B2
公开(公告)日：2022-06-28
申请号：US16832279
申请日：2020-03-27
发明人： Ashok Santra , Peter J. Boul
摘要： Methods of suspending at least one weighting agent in drilling fluids. The embodiments include adding a quantity of precursor nanoparticles including carbon nanotubes supported by metal oxide catalyst nanoparticles to the drilling fluid. The metal oxide catalyst nanoparticles and the drilling fluid are selected such that the metal oxide catalyst nanoparticles are dissolvable in the drilling fluid. The metal oxide catalyst nanoparticles dissolve in the drilling fluid, resulting in an amount of carbon nanotubes dispersed within the drilling fluid. The carbon nanotube dispersion increases the value of at least one of a Newtonian viscosity, a yield point, a plastic viscosity, and a density of the drilling fluid with the dispersed carbon nanotubes versus a similar or equivalent drilling fluid without the carbon nanotube dispersion. The method may further include adding at least one weighting agent which will become suspended in the drilling fluid.
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