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7581594 |
Surfactant method for improved oil recovery from fractured reservoirs
A method to enhance oil recovery from a fractured carbonate reservoir, the reservoir being accessible via a production well. The method includes injecting a surfactant solution including...
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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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7556096 |
Varying heating in dawsonite zones in hydrocarbon containing formations
A method for treating an oil shale formation comprising dawsonite includes assessing a dawsonite composition of one or more zones in the formation. Heat from one or more heaters is provided to the...
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7556095 |
Solution mining dawsonite from hydrocarbon containing formations with a chelating agent
A method for treating an oil shale formation comprising dawsonite includes providing heat from one or more heaters to the formation to heat the formation. Hydrocarbon fluids are produced from the...
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7527102 |
Methods and compositions for diverting acid fluids in wellbores
Viscoelastic surfactant (VES) gelled aqueous fluids containing a VES, an internal breaker, and optionally a viscosity enhancer are useful as diverting fluid for directing placement of an acid into...
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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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7513307 |
Pumping system for injecting a mixture of liquids via a well into a subterranean formation
A system and method to inject a combined aqueous or hydrocarbon-based liquid stream and a liquid carbon dioxide stream into a subterranean formation via a well using a single high-pressure pump.
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7500517 |
Kerogen extraction from subterranean oil shale resources
The present invention is directed to methods for extracting a kerogen-based product from subsurface (oil) shale formations, wherein such methods rely on fracturing and/or rubblizing portions of...
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7497278 |
Methods of degrading filter cakes in a subterranean formation
Many methods are presented including one that comprises: providing a well drill-in and servicing fluid comprising an aqueous fluid, a viscosifier, a fluid loss control additive, a bridging agent,...
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7493955 |
Well treating compositions for slow release of treatment agents and methods of using the same
A composite of a well treatment agent adsorbed onto a water-insoluble adsorbent is useful in the treatment of oil and gas wells and may be introduced, as a well treatment fluid, with a carrier...
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7481276 |
Method of inhibiting and/or preventing corrosion in oilfield treatment applications
Corrosive effects arising during oilfield treatment applications are inhibited and/or prevented by introducing into an oil or gas well at least one compound of formula I:
wherein:
R 1 ...
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7476644 |
Method and materials for hydaulic fracturing of wells
Hydraulic fracturing of wells by injecting a degradable polymer phase as a fracturing fluid is provided. Composition and degree of polymerization of the degradable polymer and the selection of...
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7455112 |
Methods and compositions relating to the control of the rates of acid-generating compounds in acidizing operations
Of the many methods provided, in one embodiment, a method is provided that comprises: providing an acid-generating fluid that comprises an acid-generating compound, a base fluid, and a salt;...
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7455111 |
Compositions for treating a well penetrating a subterranean formation and uses thereof
Fluid producing wells may be treated with a water-in-oil emulsion for the removal or inhibition of unwanted solid particulates, including pipe dope, asphaltenes and paraffins. Such emulsions are of...
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7431089 |
Methods and compositions for selectively dissolving sandstone formations
In a method of treating a sandstone-containing subterranean formation penetrated by a wellbore, a slurry of a carrier fluid containing a surface modification agent of at least one of a hydrolyzable...
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7413013 |
Surfactant-based fluid loss control agents for surfactant gels and associated fluids and methods
Of the many methods provided, in one aspect, the present invention provides a method comprising: providing a treatment fluid comprising: an aqueous base fluid, a first surfactant, and a...
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7398824 |
Method for inhibiting or controlling inorganic scale formations with copolymers of acrylamide and quaternary ammonium salts
A formulation containing a copolymer derived from a cationic monomer effectively inhibits and controls the formation of inorganic scales. Suitable copolymers include those comprising an acrylamide...
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7395863 |
Method of treating a subterranean formation with an oil-based composition containing a polysaccharide-based water-superabsorbent material
A well treating composition containing a polysaccharide-based water-superabsorbent material has particularly applicability as a thermal insulating, fracturing or acid stimulation fluid. The...
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7350572 |
Methods for controlling fluid loss
A method of treatment of subterranean formations in which leakoff through natural fractures is controlled through the use of fibers. The method involves pumping a mixture of a formation treatment...
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7343972 |
System stabilizers and performance enhancers for aqueous fluids gelled with viscoelastic surfactants
An aqueous, viscoelastic fluid gelled with a viscoelastic surfactant (VES) is stabilized and improved with an effective amount of an alkali earth metal oxide and/or alkali earth metal hydroxide....
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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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7328746 |
Method and composition for forming protective precipitate on cement surfaces prior to formation acidizing treatment
A method and composition for protecting cement surfaces in a well bore treatment zone from the destructive effects of acid mud and other acidization processes commonly used to stimulate hydrocarbon...
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7318475 |
Matrix acidizing high permeability contrast formations
A method for stimulating thick or multilayered heterogeneous or homogeneous formations in a single trip without packers involves perforating with tubing conveyed perforation, then injecting a...
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7306041 |
Method for treating a subterranean formation
Disclosed are acid fracturing methods for subterranean siliceous formations employing a viscous dissolving fluid to create a permeable conduit that bypasses the near wellbore damage. The viscous...
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7303019 |
Viscoelastic surfactant fluids and associated diverting methods
Provided are treatment fluids that comprise an aqueous base fluid, and a methyl ester sulfonate surfactant, and associated diverting methods of use. In one embodiment, the present invention...
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7303012 |
Propped fracture with high effective surface area
Propped fractures in formations from which fluids are produced are described that have wormholes extending out into the formations from the faces of the fractures at locations distant from...
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7299874 |
Viscoelastic surfactant fluids and associated methods
Provided are treatment fluids that comprise an aqueous based fluid, a water-soluble salt, and a methyl ester sulfonate surfactant, and associated methods. In one embodiment, a method of treating a...
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7299870 |
Self diverting matrix acid
A method is described for treating a subterranean formation with a low viscosity fluid system that contains a surfactant or mixture of surfactants that does not divert fluid flow in the formation,...
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7290614 |
Methods for effecting controlled break in pH dependent foamed fracturing fluid
The invention provides a fluid for use in a subterranean formation penetrated by a wellbore, the fluid comprising: (a) water; (b) delayed release acid; (c) a surfactant comprising a tertiary alkyl...
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7270180 |
Scaling inhibitors and method for using the same in high density brines
A formulation containing a copolymer derived from a cationic monomer effectively inhibits and controls the formation of inorganic scales. The formulation has particular application in the removal...
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7270179 |
Method for stimulation of liquid flow in a well
An improved method of controlled energy delivery utilizing solid, liquid, and gaseous carbon dioxide (CO 2 ) into a water well and the surrounding aquifer to remove deposited material which may...
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7237608 |
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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7216710 |
Thiol/aldehyde corrosion inhibitors
Methods of inhibiting corrosion comprising providing a corrosive environment; adding a corrosion inhibitor comprising a reaction product of a thiol compound and an aldehyde compound. Methods of...
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7205264 |
Well treatment method using fluid containing lactic acid or salt thereof
Fluids comprising an aqueous acid, synthetic polymer, metal crosslinking agent and lactic acid or a salt thereof have particular applicability in fracturing subterranean formations of an oil or gas...
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7204312 |
Compositions and methods for the delivery of chemical components in subterranean well bores
The present invention relates to the delivery of a plurality of chemical components in well bore applications. More particularly, this invention relates to delivery capsules and methods of using...
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7198106 |
Method for enhancing gas well secondary recovery operations
The present invention relates to a process and system for the remediation and enhancement of secondary recovery gas from a natural gas well and geologic formation. The present invention employs the...
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7195068 |
Filter cake degradation compositions and methods of use in subterranean operations
The present invention relates to methods and compositions for degrading filter cakes in subterranean formations, and more specifically, to improved methods and compositions for degrading filter...
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7192908 |
Composition and method for treating a subterranean formation
An aqueous oilfield treatment fluid containing a chelating agent and an HF source is described. This fluid is effective at dissolving siliceous materials such as clays and keeping the dissolved...
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7185702 |
Methods and compositions for the in-situ thermal stimulation of hydrocarbons using peroxide-generating compounds
One embodiment provides a method for stimulating hydrocarbon production in a subterranean formation, comprising: introducing a peroxide-generating compound into a desired location in a subterranean...
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7182136 |
Methods of reducing water permeability for acidizing a subterranean formation
The present invention provides a method of stimulating a subterranean formation penetrated by a well. The formation has a water-bearing section and a hydrocarbon-bearing section. The method...
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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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7159659 |
Viscoelastic surfactant fluids and associated acidizing methods
Provided are treatment fluids that comprise an aqueous base fluid, an acid, and a methyl ester sulfonate surfactant, and associated methods of use. In one embodiment, the present invention provides...
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7159655 |
Method for inhibiting or controlling inorganic scale formations
A formulation containing a copolymer derived from a cationic monomer effectively inhibits and controls the formation of inorganic scales. The formulation has particular application in the removal...
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7156178 |
Compositions containing a buffer and a peroxide or peracid useful for treating wells
Compositions containing a peroxide or peracid and an organic acid salt buffer are provided. Also provided is a method for utilizing such compositions for removing polymers from oil and gas wells,...
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7156175 |
Methods of generating gas in well fluids
The present invention relates to methods of chemically generating gas in aqueous fluids utilized in the drilling and completion of wells such as drilling fluids, spacer fluids, and aqueous acid...
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7148184 |
Self-diverting foamed system
A method is given for diverting acids in matrix acidizing and acid fracturing. The acids are diverted with a diverting agent that is an energized or foamed acidic viscoelastic surfactant system...
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7140438 |
Orthoester compositions and methods of use in subterranean applications
The present invention relates to methods and compositions for treating subterranean formations, and more specifically, to improved methods and compositions for generating acids for use downhole,...
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7131495 |
Method for preparing a chlorine dioxide block-removing agent in oil wells
A method to synthesize a chlorine dioxide block remover in a well is described. The method includes dissolving a chlorate aqueous solution and some acidic substances in water and to produce a...
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7114567 |
Propped fracture with high effective surface area
Propped fractures in formations from which fluids are produced are described that have wormholes extending out into the formations from the faces of the fractures at locations distant from...
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