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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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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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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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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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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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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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5311943 |
Blends of propoxy and ethoxy surfactants
A mixture of propoxylated and ethoxylated surfactants is provided, along with a method to displace water flood residual oil from subterranean formations utilizing this mixture. The mixture is...
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5267614 |
Method for disposing of waste gas in subterranean formations
A method for safely disposing of a waste gas from produced hydrocarbons. The waste gas is mixed with a surfactant to form a foam which, in turn, is placed within a disposal zone of a subterranean...
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5251698 |
Method of using lignosulfonate-acrylic acid graft copolymers as sacrificial agents for surfactant flooding
A sacrificial agent method employing lignosulfonate-acrylic acid graft copolymers to reduce chemical loss to the formation during hydrocarbon recovery by surfactant system injection and sweep...
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5193617 |
Micro-slug injection of surfactants in an enhanced oil recovery process
A method for introducing a surfactant into an oil bearing formation includes plurality of a micro-slug injections of surfactant. Each micro-slug injection comprises an "on time" in which the...
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5069802 |
Gas flood surfactants enriched in olefin disulfonate
Improved gas foam flooding surfactants and gas foam-forming mixtures wherein the surfactants are enriched in olefin disulfonate. The surfactants may be used in either a gas drive or a gas soak...
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4971150 |
Foam injection into a gravity override zone for improved hydrocarbon production
A process for increasing the production of hydrocarbonaceous fluids in a reservoir where foam is injected into a gravity override zone. Foam is injected into the override zone via a well placed in...
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4828029 |
Solubilizing surfactants in miscible drive solvents
A process for dissolving surfactants in miscible gaseous drive fluids is discussed. The poor solvent properties of these drive fluids are enhanced by the addition of a cosolvent which facilitates...
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4739831 |
Gas flooding process for the recovery of oil from subterranean formations
In a gas flooding operation, the sweep efficiency of the gas is improved using a surfactant solution comprising an alkylated diphenyl sulfonate.
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4688637 |
Method for induced flow recovery of shallow crude oil deposits
A method to enhance oil production from producing formations using a pressure differential created by evacuating a recovery hole cased through the overburden into the producing formation, and...
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4548721 |
Method of enhanced oil recovery and compositions useful therein
A method for the enhanced recovery of oil comprised of injecting into an oil containing formation a surfactant system comprised of an oil soluble amine modified lignin and an anionic or nonionic...
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4503170 |
Shear thickening fluid
The instant invention is directed to shear thickening fluids to prevent unwanted flow in wells penetrating subterranean formations. The shear thickening fluids comprise (1) a water swellable...
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4452308 |
Method of using low molecular weight polyalkylene glycols as sacrificial agents for surfactant flooding
The disclosed invention is a method of injecting polyalkylene glycols, or copolymers thereof, having a molecular weight between about 100 and 1200 into a hydrocarbon formation in conjunction with a...
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4444262 |
Method of using amines as sacrificial agents for chemical flooding
The disclosed invention is a method of injecting an amine sacrificial agent into a hydrocarbon formation in conjunction with a chemical flooding process to reduce the loss of injected chemicals to...
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4391925 |
Shear thickening well control fluid
The instant invention is directed to shear thickening fluids which comprise a water swellable clay capable of rapidly forming a paste having a strength of at least 2000 lbs/100 ft2 upon interaction...
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4331202 |
Method for recovery of hydrocarbon material from hydrocarbon material-bearing formations
A method of heating a hydrocarbon material contained in a recovery zone in an underground hydrocarbon material-bearing formation to reduce the viscosity thereof for facilitating recovery of the...
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4265308 |
Oil recovery method using unique salinity for oil recovery surfactant system
A series of surfactant systems is prepared at varying electrolyte concentrations, each system being mixed with oil to be displaced or its equivalent and allowed to equilibrate to determine the...
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4157306 |
Tertiary oil recovery process utilizing a preflush
An adjusted salinity and hardness, aqueous preflush containing a thickening material which can be, for example, a hydrophilic material such as polyacrylamide, polysaccharide, polyvinyl aromatic...
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4113013 |
Asphaltenes as sacrificial agents in oil recovery processes
A process for producing petroleum from subterranean formations is disclosed wherein production from the formation is obtained by driving a fluid from an injection well to a production well. The...
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4086963 |
Method of oxidizing hydrogen sulfide
The hydrogen sulfide concentration of a gas is reduced by reacting hydrogen sulfide in the gas with oxygen in the presence of raw oil shale. The ratio of sulfur dioxide to sulfur produced by this...
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4086962 |
Decreasing hydrogen sulfide concentration of a gas
The hydrogen sulfide concentration and total sulfur concentration of a gas of relatively higher hydrogen sulfide and total sulfur concentration are reduced by combining hydrogen sulfide in the gas...
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4021356 |
Alkoxylated asphalts as co-surfactants in surfactant oil recovery processes usable in formations containing water having high concentrations of polyvalent ions such as calcium and magnesium
Ethoxylated asphalt solutions have high tolerance for sodium and calcium ions as well as magnesium and other divalent ions. The use of ethoxylated asphalts in combination with other surfactants...
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3916997 |
Oil recovery with high conductivity micellar systems
Improved oil recovery can be obtained by flooding with oil-external micellar systems having an electrical conductivity above about 5 × 10-5 ohm-1 centimeter-1. Such conductivities can be obtained ...
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3673124 |
SOLUBLE OIL COMPOSITION
A soluble oil composition comprising a mixture of liquid hydrocarbon, a surface active agent and butyl Cellosolve that is particularly adapted for use as a displacement fluid in a miscible flooding...
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3691072 |
SOLUBLE OIL COMPOSITION
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3477511 |
PROCESS FOR THE RECOVERY OF PETROLEUM USING SOLUBLE OILS
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3476184 |
METHOD OF DESIGNING A SOLUBLE OIL SLUG FOR AN OIL RECOVERY PROCESS
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3454095 |
OIL RECOVERY METHOD USING STEAM STIMULATION OF SUBTERRANEAN FORMATION
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3435898 |
WATER FLOOD METHOD WITH OIL SOLUBLE SURFACTANT
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3398791 |
Oil recovery process with surface-active agents formed in situ by injection of gases
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3392782 |
In situ preparation of surface active agents in subterranean formations
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3392105 |
Use of a soluble oil in the extraction of hydrocarbons from oil sands
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3364994 |
Oil well treating method
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3357487 |
Method of oil recovery with a hot driving fluid
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3335794 |
Secondary recovery method with surfactant in fracturing fluid
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3307628 |
Process for secondary recovery of petroleum using stabilized microemulsions
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3302711 |
Petroleum recovery with chemical interacting floods forming organic sulfonates
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3297084 |
Miscible flood viscosity control through ph regulation
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3288213 |
Surfactant-water flooding process
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3254714 |
Use of microemulsions in miscible-type oil recovery procedure
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3246694 |
Water flooding process for the recovery of oil
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3236303 |
Water-flooding method using an alcohol-surfactant mixture
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3212575 |
Use of n-acyl sarcosines in miscible flooding
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3196944 |
Miscible-displacement process
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3181609 |
Oil recovery process
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