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7642223 |
Methods of generating a gas in a plugging composition to improve its sealing ability in a downhole permeable zone
Methods of servicing a wellbore include generating gas in a plugging composition in situ within a permeable zone in the wellbore, thereby improving the ability of the plugging composition to seal...
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7638468 |
Surfactant based viscoelastic fluids
The invention relates to surfactant based viscoelastic fluids for enhancing the productivity of a hydrocarbon-bearing formations, such as oil wells. The viscoelastic fluids of the invention have...
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7618926 |
Method of foaming saturated or near saturated brines with synergistic mixtures
A synergistic blend for foaming concentrated brines comprises at least one foaming agent (in an amount between from about 10 to about 90 weight percent of the blend) and a compound of the formula:
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7615517 |
Use of mineral oils to reduce fluid loss for viscoelastic surfactant gelled fluids
Fluids viscosified with viscoelastic surfactants (VESs) may have their fluid loss properties improved with at least one mineral oil which has a viscosity greater than 20 cps at ambient temperature....
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7575054 |
Self diverting matrix acid
A method is described for treating a subterranean formation with a low viscosity fluid system that contains a viscoelastic surfactant at a concentration too low to viscosify the fluid, but that is...
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7550413 |
Fluid loss control agents for viscoelastic surfactant fluids
Alkaline earth metal compounds may be fluid loss control agents for viscoelastic surfactant (VES) fluids used for well completion or stimulation in hydrocarbon recovery operations. The VES fluid...
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7544642 |
Zeolite-containing remedial compositions
Methods and compositions for wellbore treating fluids that include zeolite and at least one carrier fluid.
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7544643 |
Viscosity enhancers for viscoelastic surfactant stimulation fluids
Piezoelectric crystal particles (which include pyroelectric crystal particles) enhance the viscosity of aqueous fluids that have increased viscosity due to the presence of viscoelastic surfactants...
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7521400 |
Gelled oil with surfactant
A viscoelastic gelled oil, for example gelled diesel or paraffin oil, is made with a gelling agent, for example a phosphate ester, a metal carboxylate, for example an aluminum carboxylate, and a...
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7517835 |
Surfactant-polymer compositions for enhancing the stability of viscoelastic-surfactant based fluid
Compositions for increasing the thermal and pressure stability of well fluids viscosified using viscoelastic surfactants, the compositions including an effective amount of an oligomeric or...
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7514391 |
Method and composition for removing filter cake from a horizontal wellbore using a stable acid foam
A composition and method for removing a filter cake from a horizontal wellbore in a subterranean formation using a composition containing a inorganic or organic acidic material, a cationic...
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7514390 |
Method for removing filter cake from a horizontal wellbore using acid foam
A composition and method for removing a filter cake from a horizontal wellbore in a subterranean formation using a composition containing a inorganic or organic acidic material, a cationic...
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7510005 |
Controlling pressure and static charge build up within an annular volume of a welllbore
A process is described for replacing at least a portion of the liquid within the annular volume of a casing system within a wellbore with a second liquid. The second liquid comprising at least one...
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7507693 |
Viscoelastic surfactant fluid systems comprising an aromatic sulfonate and methods of using same
Methods of improving shear recovery time of viscoelastic surfactant fluid systems are described, one method involving providing a viscoelastic surfactant fluid system comprising a major portion of...
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7494957 |
Energized fluids and methods of use thereof
The present invention relates to novel aqueous wellbore treatment fluids containing a gas component, a heteropolysaccharide, an electrolyte, and a surfactant, wherein the fluids may further include...
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7435706 |
Thinners for invert emulsions
A method of reducing the viscosity of oil-based drilling fluids and well service fluids at low temperatures and a thinner compound for use in such drilling fluids and well service fluids is...
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7427583 |
Aqueous fracturing fluid
The invention concerns an aqueous viscoelastic fracturing fluid for use in the recovery of hydrocarbons. According to the invention, the fluid comprises a viscoelastic surfactant and a...
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7407916 |
Foamed treatment fluids and associated methods
Foamed treatment fluids comprising water, a gas, and a foaming and foam stabilizing surfactant mixture comprising an alkali salt of an alkyl ether sulfate, wherein the alkali salt of the alkyl...
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7402549 |
Viscoelastic surfactant rheology modification
A method for shortening the shear recovery time of cationic, zwitterionic, and amphoteric viscoelastic surfactant fluid systems by adding an effective amount of a rheology enhancer selected from...
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7399732 |
Fracturing fluid containing amphoteric glycinate surfactant
An improved method and fracturing fluid for hydraulic fracturing of a subterranean formation, the fracturing fluid including a surfactant, a water soluble or dispersible anionic organic salt, an...
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7381689 |
Methods for inhibiting hydrate blockage in oil and gas pipelines using amide compounds
A method and an amide composition used therein for inhibiting, retarding, mitigating, reducing, controlling and/or delaying formation of hydrocarbon hydrates or agglomerates of hydrates. The method...
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7378378 |
Rheology enhancers
A method for increasing the rate of shear rehealing of fluids made with cationic, zwitterionic, and amphoteric viscoelastic surfactant fluid systems by adding an effective amount of a rheology...
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7373977 |
Process for oil recovery employing surfactant gels
A process for recovering oil by injecting into a subterranean oil-bearing reservoir through one or more injection wells, an aqueous solution containing one or more amphoteric alkyl amido betaine...
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7358215 |
Quaternary ammonium salts as thickening agents for aqueous systems
This invention relates to the use of alkyl amido quaternary ammonium salts, and formulations thereof, as thickening agents in aqueous based fluids, especially those used in oil field applications....
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7343978 |
Scale dissolver fluid
A scale dissolver fluid for dissolving scale in a subterranean hydrocarbon-bearing formation comprises an effective amount of a scale dissolver formulation and an effective amount of a surfactant...
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7341107 |
Viscoelastic acid
An acidic viscoelastic surfactant fluid composition is formulated with an acid, for example hydrochloric acid, a cationic surfactant, for example a quaternary amine, and a break-enabling salt, for...
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7326670 |
Well service fluid and method of making and using the same
A well service fluid comprising one or more anionic viscoelastic surfactants and one or more polymers is described. The fluids can contain an aqueous or non-aqueous fluid and/or a buffer for...
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7320952 |
Additive for viscoelastic fluid
Composition and method for shortening the shear recovery time of cationic, zwitterionic, and amphoteric viscoelastic surfactant fluid systems by adding an effective amount of a co-gelling agent...
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7288505 |
Fluid system having controllable reversible viscosity
This Invention relates to methods of treating a subterranean hydrocarbons reservoir comprising contacting the formation with a treating fluid comprising an aqueous solution, an acid, a surfactant...
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7244694 |
Viscoelastic fluids containing nanotubes for oilfield uses
The present invention relates to viscoelastic fluids that contain nanotube structures that may be used advantageously as oilfield stimulation fluids in many different applications, most...
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7238648 |
Viscoelastic surfactant fluids and related methods of use
Viscoelastic surfactant based aqueous fluid systems useful as thickening agents in various applications, e.g. to suspend particles produced during the excavation of geologic formations. The...
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7219735 |
Packer fluid
A packer fluid is provided for use with a wellbore fluid in an annulus or casing bore, having an aqueous portion which contains additives for preventing corrosion, microbiological activity, salt...
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7207388 |
Non-Damaging Fluid-Loss Pill and Method of Using the Same
A fluid-loss pill that includes a brine solution and an effective amount of a viscoelastic surfactant is disclosed. The viscoelastic surfactant preferably includes at least one compound selected...
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7192907 |
High performance water-based drilling mud and method of use
A water based drilling fluid for use in drilling a subterranean well through a subterranean formation that swells in the presence of water, the drilling fluid is formulated to include: an aqueous...
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7163056 |
Esterquat acidic subterranean treatment fluids and methods of using esterquats acidic subterranean treatment fluids
The present invention relates to acidic treatment fluids that comprise an acid fluid and an ester-containing quaternary ammonium compound (“esterquat”) and methods of their use. One embodiment...
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7160843 |
Oil-based demulsifying agent and its use in the treatment of drains bored in oil-based mud
An oil-based demulsifying formulation which can be used in the treatment of drains bored in oil-based mud, non ecotoxic and optimally compatible with formation fluids, comprises at least one...
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7148185 |
Viscoelastic surfactant fluids stable at high brine concentration and methods of using same
A viscous aqueous high density well treatment fluid composition stable at high temperature containing a surfactant and inorganic salts is described. Methods of preparing the fluid and increasing...
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7125825 |
Amidoamine salt-based viscosifying agents and methods of use
Viscoelastic surfactants are described for use in aqueous systems to generate thickened fluids. The surfactants are alkyl amidoamine salts of inorganic acids and/or organic acids. The fluids may...
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7119050 |
Fluid system having controllable reversible viscosity
This Invention relates to methods of treating a subterranean hydrocarbons reservoir comprising contacting the formation with a treating fluid comprising an aqueous solution, an acid, a surfactant...
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7115546 |
Acid diverting system containing quaternary amine
A process for stimulating a formation is disclosed wherein a diverting fluid is used to divert an acid treatment package from a high permeability or damaged portion of a formation to a low...
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7084095 |
Methods for controlling the rheological properties of viscoelastic surfactants based fluids
It was found that the addition of polymers to viscoelastic surfactant base system allows to adjust the rheological properties of the base fluid. Depending in particular on one side of the ratio of...
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7063154 |
Methods of treating subterranean zones and treating fluids therefor
Methods of treating subterranean zones and treating fluids are provided. The methods are basically comprised of preparing or providing a subterranean zone treating fluid comprising an aqueous fluid...
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7052901 |
Bacteria-based and enzyme-based mechanisms and products for viscosity reduction breaking of viscoelastic fluids
It has been discovered that fluids viscosified with viscoelastic surfactants (VESs) may have their viscosities reduced (gels broken) by the direct or indirect action of a biochemical agent, such as...
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7012044 |
Oil and gas recovery from subterranean formations
Methods are provided for fracturing subterranean formations using fluids having substantially reduced polymer loadings that have performance equivalent to conventional fluids. Reduced polymer...
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6972274 |
Method of improving the permeability of an underground petroleum-containing formation
The present invention generally relates to a method and a composition useful in restoring the permeability of a porous underground petroleum containing formation. Restoring permeability to the...
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6908888 |
Viscosity reduction of viscoelastic surfactant based fluids
Methods and compositions are disclosed for controlled addition of components that decrease the viscosity of the viscoelastic surfactant fluids or for controlled changes in the electrolyte...
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6883608 |
Gravel packing method
A method is disclosed for using aqueous VES-based gravel carrier fluids in gravel packing operations using screens and shunt tubes that have been run into a well completed with an oil-based mud....
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6881709 |
Viscosity reduction of viscoelastic surfactant based fluids
Methods and compositions are disclosed for controlled addition of components that decrease the viscosity of the viscoelastic surfactant fluids or for controlled changes in the electrolyte...
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6875728 |
Method for fracturing subterranean formations
A method of fracturing a formation with a fracturing fluid wherein the formation has particulate material that swells or migrates upon exposure to the fracturing fluid comprises preparing a...
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6866797 |
Corrosion inhibitors and methods of use
A class of quaternary ammonium compounds are found to be effective as corrosion inhibitors. These quaternary ammonium compounds may be used alone or in combination with additional components. For...
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