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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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7612022 |
Method and composition for enhanced hydrocarbons recovery
A method of treating a hydrocarbon containing formation is described. The method may include providing a hydrocarbon recovery composition to the hydrocarbon containing formation. Hydrocarbons in...
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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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7482310 |
Method of fracturing subterranean formations utilizing emulsions comprising acrylamide copolymers
A method of treating a subterranean formation penetrated by a well bore including:
(a) preparing a fracturing fluid containing a mixture resulting from:
(I) providing a water-in-oil...
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7475727 |
Methods of improving conformance control in fractured hydrocarbon reservoirs
Three methods for improving the blocking ability of gels by improving the performance of gels in fractured reservoirs are provided. First method utilizes overload of a crosslinker, the second...
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7461694 |
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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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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7347264 |
Methods and compositions for well completion in steam breakthrough wells
Methods of steam flooding for stimulating hydrocarbon production are provided. In general, the methods comprise the steps of: (A) injecting a mutual solvent preflush fluid capable of dissolving oil...
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7347263 |
Networked polymeric gels and use of such polymeric gels in hydrocarbon recovery
A composition includes water having a salinity of at least 1 ppt, at least one hydrophilic polymer containing primary (—NH 2 ) and/or secondary (—NHR) amine groups and at least one saccharide...
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7345012 |
Foamed viscoelastic surfactants
A method for increasing the foam stability of foams made with cationic, zwitterionic, and amphoteric viscoelastic surfactant fluid systems by adding an effective amount of an amphiphilic polymeric...
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7338924 |
Oil-in-water-in-oil emulsion
An oil-in-water-in-oil emulsion (O/W/O) comprising a first oil-in-water emulsion dispersed in a second oil, and a method of preparing the same. The O/W/O emulsion can be used as a drive fluid in an...
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7328743 |
Toe-to-heel waterflooding with progressive blockage of the toe region
A modified toe-to-heel waterflooding (TTHW) process is provided for recovering oil from a reservoir in an underground formation. After establishing the conventional TTHW waterflood, the process...
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7312184 |
Recovery composition and method
A method and composition are described for improving recovery of oil from an oil reservoir. The method includes adding an effective amount of a fatty acid alkyl ester oil recovery composition to an...
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7311144 |
Apparatus and method for increasing well production using surfactant injection
An apparatus and method for injecting surfactant into a well for coal bed methane (CBM) recovery, tight sand gas extraction, and other gas extraction techniques provides for the mixing of...
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7304098 |
Hydrogel for use in downhole seal applications
The present invention is a composition for forming seals. The composition includes a base material and a hydrogel. The base materials is preferably an elastomer or a thermoplastic. Seals formed...
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7300973 |
Composition for recovering hydrocarbon fluids from a subterranean reservoir
A composition comprising expandable cross linked polymeric microparticles having an unexpanded volume average particle size diameter of from about 0.05 to about 10 microns and a cross linking agent...
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7291651 |
Carbon dioxide foamed fluids
An aqueous viscoelastic surfactant (VES) fluid foamed or energized with carbon dioxide, in which the VES is more compatible with the carbon dioxide, is made by the addition of one or more than one...
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7287588 |
Gelable liquid and method for selectively inhibiting the gelation of a gelable liquid
A method for selectively blocking water inflow from a water-producing formation of a hydrocarbon well provides for injecting into the well a controlled-gelation aqueous solution containing a...
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7287586 |
Compositions and methods for plugging and sealing a subterranean formation
The invention provides for a composition for treating a subterranean formation, the composition comprising a water-swellable agent and a sealing agent. Preferably, the water-swellable agent: i)...
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7281579 |
Method for terminating or reducing water flow in a subterranean formation
This invention relates to a method of reducing the deleterious effects of water production in a subterranean formation by placing an aqueous phase polymer and/or resin, which at a designated set up...
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7279447 |
Subterranean well and oil or gas stream treatment with bis(3-alkoxyalkan-2-ol) sulfides, sulfones, and sulfoxides: new surface active agents
Compositions containing surfactant compounds according to formula (I)
ROCH 2 CH(OH)CR 1 R 2 ZCR 1 R 2 CH(OH)CH 2 OR, ...
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7243720 |
Inhibiting breakthrough of driving fluid via a permeable geological layer into an oil production well
A method for selectively reducing the permeability of one or more relatively permeable geological layers of an oil-bearing formation, to inhibit breakthrough of driving fluid from a driving fluid...
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7220709 |
Process of diverting stimulation fluids
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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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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7196041 |
Surfactant comprising alkali metal salt of 2-methyl oleic acid or 2-ethyl oleic acid
A surfactant has the formula (R 1 —X) n Z, where R 1 is an aliphatic group comprising a C 10 –C 25 principal straight chain bonded at a terminal carbon atom thereof to X, and comprising at...
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7150319 |
Method for reducing or completely eliminating water influx in an underground formation, and crosslinkable copolymers for implementing said method
A method for reducing or completely eliminating water influx in an oil or natural gas borehole includes introducing in the borehole an aqueous solution of a copolymer comprising: A) 40–98 wt. %...
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7069990 |
Enhanced oil recovery methods
A process for enhanced oil recovery from an extraction operation comprises the steps of selection of an appropriate hydrocarbon bearing stratum; providing at least one production well and one...
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7036585 |
Aqueous viscoelastic fluid
The invention concerns an aqueous viscoelastic fluid for use in the recovery of hydrocarbons. According to the invention this fluid comprises a first viscoelastic surfactant and a second surfactant...
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6989355 |
Under-neutralized alkylxylene sulfonic acid composition for enhanced oil recovery processes
The present invention is directed to an under-neutralized alkylxylene sulfonic acid composition for enhanced oil recovery processes. The present invention is also directed to a method for enhancing...
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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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6951248 |
Method of separating oil from geological formations
A method for separating oil from geological formations by application of an aqueous oxidant. The oxidant breaks the interfacial attraction between the oil phase and the geological formation and...
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6894008 |
Method of increasing pH of high-density brines
It has been discovered that carbonate powders and bicarbonate powders are useful to increase the pH and corrosion resistance of high-density brines, such as zinc bromide brines, without...
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6889766 |
Methods for passing a swelling agent into a reservoir to block undesirable flow paths during oil production
A method for recovering oil from a reservoir is provided. This method comprises passing a swelling agent into a permeable zone of the reservoir that allows fluid to flow between an injection well...
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6854518 |
Method and apparatus for enhancing production from an oil and/or gas well
A method of assisting production of an oil and/or gas well involves reducing the pressure at the top of a well and aid in oil and gas production. If any gas exists in the produced fluid, gas...
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6823939 |
Methods of treating subterranean zones penetrated by well bores
Methods of treating subterranean zones penetrated by well bores wherein the static temperatures of the zones are as high as 400° F. and greater include using aqueous treating fluids comprised of...
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6736211 |
Method of using alkylsulfonated phenol/aldehyde resins as adsorption reducing agents for chemical flooding
A method of recovering oil or contaminants from subterranean reservoirs using a surfactant system where an adsorption reducing agent is injected before, after, and/or with the surfactant system....
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6729402 |
Method of recovering hydrocarbon fluids from a subterranean reservoir
This invention is directed to a composition comprising expandable cross linked polymeric microparticles having an unexpanded volume average particle size diameter of from about 0.05 to about 10...
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6662872 |
Combined steam and vapor extraction process (SAVEX) for in situ bitumen and heavy oil production
Steam is injected into the reservoir, heats the reservoir to mobilize and recover at least a fraction of reservoir hydrocarbons, forming a steam chamber in the reservoir. The steam is continuously...
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6638896 |
Fluids and techniques for hydrocarbon well completion
The Invention relates to fluids and techniques to optimize/enhance the production of hydrocarbon from subterranean formations (e.g., “completion fluids”), in particular, fluids and techniques...
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6591908 |
Hydrocarbon production process with decreasing steam and/or water/solvent ratio
A method for producing hydrocarbons from a subterranean formation comprises injecting a heated injection fluid composition into the formation. The heated injection fluid composition comprises at...
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6506710 |
Viscoelastic surfactants and compositions containing same
A method for controlling the rheology of aqueous systems, particularly for those intended for underground use, includes injecting an aqueous viscoelastic fluid containing a surfactant gelling agent...
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6492305 |
Method of controlling loss of a subterranean treatment fluid
Selectively cross-linked starches are disclosed that are useful as fluid loss control additives in subterranean treatment fluids comprising starches that cross-linked to a Brabender peak viscosity...
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6474413 |
Process for the reduction of the relative permeability to water in oil-bearing formations
A process for the selective and controlled reduction of permeability to water in oil-bearing formations made up of sandstone or limestone, the process comprising the injection of a slug of polymer...
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6439308 |
Foam drive method
A foam drive method for enhancing oil recovery efficiently is initiated by injecting into a subterranean oil-bearing formation, an aqueous polymer solution as a preceding-slug. This is followed by...
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6401819 |
Methods for deposition of materials in underground reservoirs
A method of precipitating or depositing material within an underground reservoir which comprises introducing into the reservoir in aqueous solution (i) an isolated enzyme and (ii) a substrate for...
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