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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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6364016 |
Methods of reducing the water permeability of subterranean formations
Improved methods of treating water and hydrocarbons producing subterranean formations to reduce the water permeabilities of the formations without substantially reducing the hydrocarbons...
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6326187 |
Method to remediate soil using a surfactant of an alkenylsuccinic anhydride or acid reacted an amine acid or salt of an amine acid
Soil, which is contaminated by one or more hydrophobic organic chemicals, can be cleaned or remediated using an aqueous composition with a surfactant prepared by reacting an alkenylsuccinic...
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6325147 |
Enhanced oil recovery process with combined injection of an aqueous phase and of at least partially water-miscible gas
Process intended for enhanced recovery of a petroleum fluid by combined injection of an aqueous phase saturated with acid gases. The process esentially consists in continuously injecting, into the...
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6283210 |
Proactive conformance for oil or gas wells
A proactive conformance method for a well includes selecting a well either in a completion phase or early in a production phase of the well and performing a conformance treatment on the well in the...
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6269881 |
Oil recovery method for waxy crude oil using alkylaryl sulfonate surfactants derived from alpha-olefins and the alpha-olefin compositions
An oil recovery process is disclosed which uses a particular class of alkylaryl sulfonate surfactants. The surfactants are derived from an alpha-olefin stream having a broad distribution of even...
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6220352 |
Procedure to mobilize asphaltene-based crude with a micelle solvent
A process for restoring the injectivity or productivity of a well penetrating a subterranean formation by injecting a micelle treating fluid into the subterranean formation via the well with the...
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6211120 |
Application of aluminum chlorohydrate in viscosifying brine for carrying proppants in gravel packing
New compositions have been discovered which are useful as slurry concentrates to carry solid particles along in a fluid. A non-limiting example would be to carry proppants in a concentrate to a...
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6204420 |
Synergistic mixtures of phosphoric esters with carboxylic acids or carboxylic acid derivatives as asphaltene dispersants
The invention relates to a synergistic mixture of A from 5 to 99% by weight of a carboxylic acid having more than 4 carbon atoms, an ethercarboxylic acid containing C 18 -C 22 -alkyl, C 18 -C...
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6196320 |
Method of cleaning a well bore prior to installing a water based fluid system
A non-aqueous system for cleaning a section of a subterranean well bore and installing a water based fluid system into the well bore. The well bore may be an open hole or contain a casing string...
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6158924 |
Soil and groundwater decontamination system with vacuum extraction
A soil and groundwater decontamination system (10) and associated process are provided for soil and groundwater remediation. The system (10) and process utilizes both a physical or chemical...
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6105672 |
Enhanced petroleum fluid recovery process in an underground reservoir
Enhanced (WAG type) oil recovery process in an underground reservoir uses forced injection, through one or more wells, alternately of fluid slugs and gas slugs, and recovery, through one or more...
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6024167 |
Transporting waterflood mobility control agents to high permeability zones
A method for improving the a real sweep efficiency of a waterflood process is described. Reservoir heterogeneity results in the waterflood being diverted to the thief zones, bypassing much of the...
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5979555 |
Surfactants for hydraulic fractoring compositions
Viscoelastic surfactant based aqueous fluid systems are described that are useful in fracturing subterranean formations penetrated by a wellbore. The preferred surfactant compositions contain...
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5911276 |
Use of unmodified kraft lignin, an amine and a water-soluble sulfonate composition in enhanced oil recovery
A method for the enhanced recovery of oil comprises injecting into an oil-containing formation an aqueous surfactant system having at least (1) a blend containing an unmodified Kraft lignin, an...
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5904208 |
Method of cleaning a well bore prior to cementing
Aqueous and non-aqueous systems for cleaning a section of a subterranean well borehole and casing prior to cementing. A series of spacer fluids are introduced into the borehole to displace drilling...
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5513705 |
Foam mixture for steam and carbon dioxide drive oil recovery method
The invention is a foam method for improving conformance during a steam flood or carbon dioxide flood in a subterranean, oil-containing formation penetrated by at least one injection well and at...
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5470749 |
Method for determining steam quality using a foaming surfactant
Steam quality is measured by mixing the steam with a small amount of surfactant to convert the steam to a stable foam, passing the stable foam through a capillary tube to determine foam quality...
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5465790 |
Enhanced oil recovery from heterogeneous reservoirs
A process for recovering oil from a multiple-layered heterogeneous reservoir with a higher oil saturation in the lower permeability layers than in the higher permeability layers. An aqueous...
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5411086 |
Oil recovery by enhanced imbitition in low permeability reservoirs
A method for enhanced oil recovery from a low permeability diatomaceous reservoir by imbibition is described. In this method, oil is displaced from a single injection well, or series of injection...
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5388646 |
Method for rejuvenation of injection wells
An injection well has become plugged with an accumulation of undesirable material that is causing the wellhead pressure required to effect a selected minimum flow rate of injection fluid into the...
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5358045 |
Enhanced oil recovery method employing a high temperature brine tolerant foam-forming composition
An enhanced oil recovery technique for recovering hydrocarbons from a reservoir during gas injection comprises the at least periodic injection of gas and a foam-forming composition into the...
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5358046 |
Oil recovery process utilizing a supercritical carbon dioxide emulsion
A process utilizing an emulsion of a carbon dioxide phase and an aqueous phase is provided to enhance oil recovery from a subterranean formation. The aqueous phase is in a liquid state and is made...
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5346008 |
Polymer enhanced foam for treating gas override or gas channeling
A process is provided for promoting oil production from a producing interval of a subterranean hydrocarbon-bearing formation by reducing undesirable gas production therefrom due to gas override or...
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5341878 |
Fatty acid salts as steam foaming agents
A steam foam method of recovering hydrocarbons from an underground hydrocarbon formation, which comprises injecting steam through an injection well into the formation, injecting an aqueous solution...
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5319966 |
Determining location and composition of liquid contaminants in geologic formations
A method is provided for locating non-aqueous phase liquid in an aquifer. An aqueous solution having the capacity to solubilize the contaminating liquid to concentrations greater than the...
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5299638 |
Process for transporting particles in a porous medium
The invention relates to an improved method for injecting and transporting small particles in a natural porous medium. The method is characterized in that, in a first step, the porous medium is...
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