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8176981 |
Fluorinated surfactants and methods of using the same
A composition comprising a nonionic fluorinated polymeric surfactant having a weight average molecular weight of least 100,000 grams per mole, the nonionic fluorinated polymeric surfactant...
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8163678 |
Enhanced oil recovery surfactant formulation and method of making the same
The present invention is directed to an enhanced oil recovery formulation which comprises: (a) an alkylaromatic sulfonate;(b) an isomerized olefin sulfonate(c) a solvent;(d) a passivator; and(e) a...
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8163676 |
Emulsifier blend
An oil-in-water emulsion that includes a brine continuous phase; and an oleaginous discontinuous phase stabilized by an emulsifier blend, the emulsifier blend comprising: an emulsifier having an...
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8146654 |
Composition and method for using waxy oil-external emulsions to modify reservoir permeability profiles
A waxy oil-external emulsion is provided for injection into a selected zone of a subsurface formation. The selected zone is typically a high permeability zone. The emulsion generally comprises oil,...
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8132624 |
Permeability flow balancing within integral screen joints and method
A method for uniform heating of a formation including applying a high temperature fluid to a tubular located within an open hole formation borehole; modifying a permeability of the tubular along...
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8104535 |
Method of improving waterflood performance using barrier fractures and inflow control devices
The present invention is directed to a method of hydrocarbon production from a hydrocarbon reservoir. The method includes providing a substantially horizontal wellbore having at least one...
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8100178 |
Method of oil recovery using a foamy oil-external emulsion
An improved method of producing hydrocarbons from a subterranean formation in which a solids-stabilized emulsion (SSE) is formed, the SSE comprising oil as a first liquid, droplets of a second...
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8101556 |
Treatment fluids for reduction of water blocks, oil blocks, and/or gas condensates and associated methods
The present invention provides treatment fluids useful for subterranean operations, and more particularly, in at least one aspect, a treatment fluid that comprises a carrier fluid and a cationic...
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8101557 |
Unsaturated fatty acids and mineral oils as internal breakers for VES-gelled fluids
Fluids viscosified with viscoelastic surfactants (VESs) may have their viscosities reduced (gels broken) by the direct or indirect action of a synergistic internal breaker composition that contains...
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8071510 |
Method of increasing lubricity of brine-based drilling fluids and completion brines
The lubricity of a drilling fluid or a completion fluid may be increased by incorporating into the fluid a water-soluble or water-dispersible salt of a sulfonated (sulfated) vegetable oil or a...
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8061422 |
Process for enhancing the production of oil from depleted, fractured reservoirs using surfactants and gas pressurization
A method for enhancing the production of liquid hydrocarbons from oil-wet, fractured reservoirs comprising injecting a surfactant solution into the reservoir, pressurizing the reservoir,...
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8016039 |
Method of reducing water influx into gas wells
A method of reducing water influx into a wellbore, wherein the wellbore is in fluid communication with a subterranean formation such as a gas producing formation or gas reservoir. The method...
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8011431 |
Process and system for creating enhanced cavitation
A system and method for cavitating a producible formation is disclosed to improve hydrocarbon production and to increase a production rate without an concurrent co-production of formation...
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8008236 |
Ortho ester breakers for viscoelastic surfactant gels and associated methods
Many methods are provided including a method comprising: providing a surfactant gel having a first viscosity that comprises an aqueous base fluid and a surfactant; providing an ortho ester breaker;...
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7987907 |
Hydrocarbon recovery process
Method for increasing the recovery of crude oil from a reservoir containing at least one porous and permeable subterranean formation wherein the formation includes sandstone rock and at least one...
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7989400 |
Viscosified treatment fluids comprising scleroglucan or diutan and associated methods
The invention provides a method for treating a subterranean formation penetrated by a wellbore, the method comprising the steps of formulating a treatment fluid and introducing the treatment fluid...
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7985718 |
Use of surfactant mixtures for tertiary mineral oil extraction
The use of a surfactant mixture comprising at least one surfactant having a hydrocarbon radical composed of from 12 to 30 carbon atoms and at least one cosurfactant having a branched hydrocarbon...
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7977284 |
Non-estrogenic alkylphenol derivatives
A method of making phenol and alkylphenol ethoxylates non-estrogenic by inserting 1 mole of propylene oxide onto the phenolic group before proceeding with the addition of ethylene oxide or mixtures...
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7964539 |
Well treatment
This invention provides a method of controlling water in a subterranean formation, said method comprising contacting said formation with a water control treatment agent which comprises an...
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7963329 |
Recovery and recycling of chemicals in chemical flooding process
A method including a) injecting into the formation an aqueous solution containing a polymer and a surfactant to create a organic phase and a aqueous phase, the surfactant being capable of reducing...
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7950452 |
Anti-fouling system for offshore drilling structures
An anti-fouling system for offshore drilling structures which injects metallic ions into seawater pumping systems. An ion generator may be positioned at various positions including the strainer...
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7935661 |
Method and composition to increase viscosity of crosslinked polymer fluids
The invention discloses a well treatment composition for use in a subterranean formation comprising: a carrier fluid; and a viscoelastic surfactant being present in a concentration of less than...
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7926561 |
Systems and methods for producing oil and/or gas
A system for producing oil and/or gas from an underground formation comprising a first array of wells dispersed above the formation; a second array of wells dispersed above the formation; wherein...
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7913759 |
Method for enhanced recovery of oil from oil reservoirs
The present invention provides a method for recovering oil from a subterranean reservoir using waterflooding, wherein the flooding fluid used in the waterflooding process comprises water and one or...
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7886824 |
Compositions and methods for gas well treatment
A microemulsion system is disclosed which comprises a solvent subsystem, a co-solvent subsystem and a surfactant subsystem comprises at least one monoalkyl branched propoxy sulfate anionic...
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7882893 |
Combined miscible drive for heavy oil production
A method of oil production is provided. The method includes forming an injection well and a production well. The method also includes pumping a mixture of oxygen and carbon dioxide (CO2) into the...
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7845883 |
Method for remediation of contaminated subsurface area
A method and system for remediation of a contaminated subsurface area. The method comprises an infiltration operation in which a surfactant containing a fluorescent dye is injected to various...
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7829508 |
Methods and compositions of controlling the rheology of a diutan-containing well treatment fluid at high temperatures
The invention provides a method for treating a subterranean formation penetrated by a wellbore, the method comprising the steps of formulating a treatment fluid and introducing the treatment fluid...
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7806186 |
Submersible pump with surfactant injection
A submersible pumping system for use downhole that includes a housing, a pump and gas separator within the housing, a motor for driving the pump and separator, and a foaming agent injection system....
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7798219 |
Enhanced oil recovery techniques using liposomes
Process and a method for enhancing recovery of petroleum from an underground source including injecting into the source, a petroleum displacement agent including fluids and modified liposomes. The...
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7789144 |
Methods for recovering oil from an oil reservoir
There is a method for enhancing the recovery of oil from a reservoir. The method has the step of a) introducing a flooding fluid into the reservoir and b) extracting the oil through a wellbore at a...
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7789143 |
Methods for recovering oil from an oil reservoir
There is a method for enhancing the recovery of oil from a reservoir. The method has the step of a) introducing a flooding fluid into the reservoir and b) extracting the oil through a wellbore at a...
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7784540 |
Method for recovering oil from an oil reservoir
There is a method for enhancing the recovery of oil from a reservoir. The method has the step of a) introducing a flooding fluid into the reservoir and b) extracting the oil through a wellbore at a...
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7779913 |
Methods for recovering oil from an oil reservoir
There is a method for enhancing the recovery of oil from a reservoir. The method has the step of a) introducing a flooding fluid into the reservoir and b) extracting the oil through a wellbore at a...
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RE41585 |
Method for controlling the rheology of an aqueous fluid and gelling agent therefor
A method for controlling the rheology of aqueous systems, particularly for those intended for underground use, includes injecting an aqueous fluid containing a surfactant gelling agent into the...
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7770641 |
Method for enhancing oil recovery with an improved oil recovery surfactant
A method for enhancing oil recovery includes the step of providing a subsurface reservoir containing hydrocarbons therewithin. A wellbore is provided in fluid communication with the subsurface...
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7770642 |
Methods for recovering oil from an oil reservoir
There is a method for enhancing the recovery of oil from a reservoir. The method has the step of a) introducing a flooding fluid into the reservoir and b) extracting the oil through a wellbore at a...
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7696134 |
Unsaturated fatty acids and mineral oils as internal breakers for VES-gelled fluids
Fluids viscosified with viscoelastic surfactants (VESs) may have their viscosities reduced (gels broken) by the direct or indirect action of a synergistic internal breaker composition that contains...
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7678201 |
Composition and process for the removal and recovery of hydrocarbons from substrates
The invention relates to a chemical composition and a process for using the chemical composition to remove and recover petroleum hydrocarbons from a contaminated substrate including an ammonia...
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7657415 |
Subterranean formation treatment methods using a darcy scale and pore scale model
Subterranean treatment formation using a model which takes into account the pore level physics by coupling the local pore scale phenomena to the macroscopic variables (Darcy velocity, pressure and...
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7651982 |
Methods and aqueous acid solutions for acidizing wells containing sludging and emulsifying oil
Methods and aqueous acid solutions for acidizing wells containing sludging and emulsifying oil are disclosed. An aqueous acid solution of the invention comprises water, hydrochloric acid, a...
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7648946 |
Methods of degrading filter cakes in subterranean formations
Methods of degrading filter cakes in subterranean formations are provided. An example of a method is a method of drilling a well bore in a subterranean formation. Another example of a method is a...
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7644759 |
Enhancement of flow rates through porous media
For extracting a liquid (such as oil) from a porous medium, the liquid is subjected to pulses that propagate through the liquid flowing through the pores of the medium. The pulses cause momentary...
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7615518 |
Composition for denaturing and breaking down friction-reducing polymer and for destroying other oil well contaminants
A composition and method for breaking down and denaturing friction-reducing compound introduced into the ground during the drilling of oil wells and for destroying other contaminants and biohazards...
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7608571 |
Method for recovering crude oil from a subterranean formation utilizing a polyphosphate ester
An aqueous fluid useful for the recovery of crude oil from a subterranean formation, including water and one or more organophosphorus materials and methods for using same.
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7595282 |
Methods and compositions of controlling the rheology of a diutan-containing well treatment fluid at high temperatures
The invention provides a method for treating a subterranean formation penetrated by a wellbore, the method comprising the steps of formulating a treatment fluid and introducing the treatment fluid...
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7588081 |
Method of modifying permeability between injection and production wells
The invention provides a method of treating a subterranean formation penetrated by at least one injection well and at least one production well, the method comprising the steps of a) analyzing the...
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7556098 |
Oil recovery method employing amphoteric surfactants
An oil recovery method employing amphoteric surfactants with the steps of: a) Injecting into one or more injection wells an aqueous solution containing a mixture of amphoteric surfactants...
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7553800 |
In-situ filter cake degradation compositions and methods of use in subterranean formations
Improved in-situ filter cake degradation compositions for use in subterranean formations, well drill-in and servicing fluids including such in-situ filter cake degradation compositions, and methods...
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7491682 |
Method of inhibiting or controlling formation of inorganic scales
A well treating composition of a composite containing a scale inhibitor adsorbed onto a water-insoluble adsorbent is useful in the control, formation and treatment of inorganic scales in a...
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