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7303006 |
Method for improved vertical sweep of oil reservoirs
In a WAG flood oil is displaced from a subterranean formation by injecting water alternately with gas into a single injection completion per pattern. The ratio of water to gas injected is the WAG...
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6817411 |
System for displacement of water in coalbed gas reservoirs
A method of stimulating coalbed methane production by injecting gas into a producer and subsequently placing the producer back on production is described. A decrease in water production may also...
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6722431 |
In situ thermal processing of hydrocarbons within a relatively permeable formation
A hydrocarbon containing formation may be treated using an in situ thermal process. Hydrocarbons, H 2 , and/or other formation fluids may be produced from the formation. Heat may be applied to a...
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6675892 |
Well testing using multiple pressure measurements
A technique includes measuring a first pressure of well fluid in a first region. The well fluid is produced from a formation into the first region. A second pressure of well fluid is measured in a...
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6631763 |
Method and system for testing a borehole by the use of a movable plug
A method and a system for testing a borehole in an underground formation by the use of so-called closed chamber testing. When carrying out the method, a test or production pipe ( 5 ) is carried...
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6615917 |
Computer controlled injection wells
Methods and apparatus are disclosed for controlling and monitoring injection zone and production zone parameters in order to control the injected fluid front to avoid breakthrough of the injected...
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6581454 |
Apparatus for measurement
An apparatus is provided comprising a first tubular having an inside surface and outside surface defining an outside diameter; a second tubular concentric with the first tubular, the second tubular...
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6446721 |
System and method for scheduling cyclic steaming of wells
The invention includes a method of scheduling cyclic steaming of a group of petroleum-containing wells including: inputting to a production-predicting means a group of data describing at least in...
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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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6318464 |
Vapor extraction of hydrocarbon deposits
An improved method for the recovery of hydrocarbons from a hydrocarbon deposit comprising the steps of introducing a diluent gas along a predominantly horizontal injection well drilled at the base...
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5865247 |
Cellulose injection system and method
Improved techniques are provided for controlling the injection of a cellulose powder/water mixture input into a formation through an injection well for recovery of hydrocarbons. The initial dosing...
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5819849 |
Method and apparatus for controlling pump operations in artificial lift production
A method and apparatus for controlling an artificial lift system is described and claimed. Preferably, the control system includes at least one sensor for detecting at least one mechanical...
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5789663 |
Porous medium test with tracer recharging and discharging through a single well
A method for quantitatively measuring the characteristic physical parameters of a porous medium, such as an aquifer that is initially recharged at a recharge rate and subsequently discharged at a...
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5778977 |
Gravity concentrated carbon dioxide for process
This invention relates to the recovery of oil from an oil-bearing formation having a natural fracture network with substantial vertical communication and wherein gravity drainage is the primary...
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5503226 |
Process for recovering hydrocarbons by thermally assisted gravity segregation
A process for recovering hydrocarbons from a subterranean formation having low permeability matrix blocks separated by a well-connected fracture network. Hot light gas is injected into the...
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5439054 |
Method for treating a mixture of gaseous fluids within a solid carbonaceous subterranean formation
A method for treating a mixture of gaseous fluids within a solid carbonaceous subterranean formation. In some embodiments, the invention provides for the disposal of a strongly adsorbing gaseous...
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5413175 |
Stabilization and control of hot two phase flow in a well
A method is provided for the stabilization and control of the two-phase flow of hot fluid containing water issuing from the top of an upwardly rising conduit or riser of a horizontal oil-production...
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5305829 |
Oil production from diatomite formations by fracture steamdrive
A steam drive method for low permeability formations is described which utilizes a plurality of wellbores in an elongated pattern configuration. The wells initially undergo a cyclic steaming and...
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5214384 |
Method including electrical self potential measurements for detecting multiphase flow in a cased hole
A method for time lapse electric logging in a cased hole in which electrodes are implanted in the casing or the hole is completed with a gravel packed non conductive, perforated liner that allows...
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5141054 |
Limited entry steam heating method for uniform heat distribution
A well completion method is claimed for steam stimulation of a wellbore, either horizontal or vertical, where limited entry perforations are utilized. Limited-entry perforations of specified...
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5135052 |
Recovery of oil using microemulsions
A method of recovering hydrocarbons from subterranean reservoirs by the use of a viscous microemulsion form the single phase region of the ternary diagram of a microemulsion system that is optimal...
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5042580 |
Oil recovery process for use in fractured reservoirs
A process for recovering oil from fractured formations is provided which involves altering the wettability of the formation, particularly at the interface of the fracture and rock matrix. The...
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5027897 |
Method of treatment of drilled-in underground formation saturated with hydrocarbon gas
The method consists in that the formation pressure is measured, and a solvent is fed through a well into the formation. Then a hydrophilizing solution is fed through the same well into the same...
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5025859 |
Overlapping horizontal fracture formation and flooding process
In a fluid flood process for enhancing the secondary recovery of hydrocarbons from a hydrocarbon permeable and hydrocarbon bearing reservoir using plural recovery wells, each adjacent at least one...
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5009266 |
Method for in situ contaminant extraction from soil
A method for the in situ removal of mobilizable contaminants, including volatile and semi-volatile organic compounds, from a contaminated unsaturated zone of primarily porous layers of soil,...
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4946606 |
Producing oil-in-water microemulsions from a microemulsion concentrate
The invention is a method of producing a homogeneous oil-in-water microemulsion comprised of oil, brine and surfactant, wherein the oil has a equivalent alkane carbon number higher than the crude...
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4919206 |
Method for preventing bitumen backflow in injection wells when steam injection is interrupted
A steam flood operation in which each injector is fitted with a pressure transducer and control valve which are tied into a water supply. Upon a loss of steam injection, and injection pressure, the...
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4899817 |
Miscible oil recovery process using carbon dioxide and alcohol
A process for modifying the minimum miscibility pressure (MMP) of a drive fluid and hydrocarbonaceous fluid mixture by addition of alcohol to the drive fluid. Alcohols which can be utilized include...
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4766558 |
Method of calculating minimum miscibility pressure
A method is disclosed for determining the minimum miscibility pressure of a three (3) or more component fluid system consisting of an in-place fluid and an injected fluid, such as a mixture of...
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4721158 |
Fluid injection control system
Disclosed herein is a method and related system for controlling the injection of fluid into a plurality of spaced wellbores using a fluid distribution system to direct fluid from a fluid source to...
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4703797 |
Sweep improvement in enhanced oil recovery
A method for sweep improvement during enhanced oil recovery in a subterranean oil-bearing formation concerns the generation of foam by the dispersion of the displacing fluid in an aqueous solution...
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4676313 |
Controlled reservoir production
This invention contemplates a method of enhancing oil and/or gas recovery by properly drilling injection and production wells into a reservoir, incorporating flow control valves and sensors in both...
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4653583 |
Optimum production rate for horizontal wells
The disclosed invention is a method of producing horizontal wells in the most efficient manner at an optimum fluid production rate, which is the maximum rate at which fluids may be produced from a...
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4641709 |
Controlling steam distribution
An enhanced oil recovery technique includes the predetermination of a desired steam distribution within a steam flood pattern, which preferably is proportional to the volumes of oil in place within...
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4633947 |
Production of a polyacrylamide solution used in an oil recovery process
A process for producing an aqueous partially hydrolyzed polyacrylamide solution employed to recover oil from a subterranean oil-bearing formation. The properties of viscosity and screen factor for...
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4601336 |
Process for selecting a steam foam forming surfactant
A steam-foam-forming surfactant effective for displacing the oil in a particular reservoir is selected by comparing the capabilities of foams formed by different surfactants for both flowing...
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4589486 |
Carbon dioxide flooding with a premixed transition zone of carbon dioxide and crude oil components
The disclosed invention is a method of recovering hydrocarbons by determining the critical concentrations of various crude oil components to carbon dioxide to achieve first contact miscibility of a...
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4560002 |
Two dimensional microwave chemical flood testing means and method
A method of two dimensional chemical flood testing includes evacuating a porous medium contained in a test cell. The porous medium in the test cell is irradiated with a beam of microwave energy at...
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4502538 |
Polyalkoxy sulfonate, CO.sub.2 and brine drive process for oil recovery
Oil is displaced within a subterranean reservoir by injecting a combination of substantially liquefied CO 2 , brine and surfactant material into the reservoir, with the surfactant material being a...
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4482634 |
Chemical flood testing method
A method of testing a chemical for use in an enhanced recovery of oil from an earth formation includes obtaining a test core of an earth formation. The test core is cleaned and then subjected to a...
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4473117 |
Method and apparatus for obtaining production or injection profiles
The fluid flow profile in an underground reservoir having a well borehole is determined by placing in the well borehole an instrument capable of detecting the velocity of an interface moving in the...
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4460044 |
Advancing heated annulus steam drive
A method is disclosed for producing viscous petroleum from subsurface deposits. The method employs a vertical well and a horizontal well through the petroleum deposit. A combination of injection...
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4456065 |
Heavy oil recovering
In a section of an oil field a first and only bore hole (5) is drilled through the strata (3) carrying heavy oil until the underlying stratum (4) void of heavy oil and enlarged to a cavern-like...
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4375238 |
Method for recovery of oil from reservoirs of non-uniform permeability
In an oil bearing formation including at least two strata of differing permeabilities oil recovery is enhanced by the controlled injection of a miscible fluid under conditions selected so that the...
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4324291 |
Viscous oil recovery method
Disclosed is an improved viscous oil recovery method employing the injection of a thermal recovery fluid which may be steam or a mixture of steam and additives, and cycles of pressurization and...
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4299711 |
Surfactant waterflooding enhanced oil recovery process
Disclosed is an improved surfactant waterflooding enhanced oil recovery process employing a fluid containing as substantial in the only anionic surfactant, an ethoxylated and sulfated or...
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4255270 |
Characterizing petroleum sulfonates by phase behavior
A method of characterizing a petroleum sulfonate of unknown average equivalent weight, comprising: (a) identifying at least one substantially pure hydrocarbon which forms three phases,...
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4254831 |
Method and apparatus for restoring and maintaining underground aquifer water system
A method and apparatus are disclosed for restoring and/or maintaining an underground aquifer water supply system plagued with decreased water flow attributable to accumulation of undesirable flow...
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4249603 |
Doping a retort with radioactive nuclides to determine the locus of a processing zone
The locus of a processing zone advancing through a fragmented permeable mass of formation particles in an in situ oil shale retort in a subterranean formation containing oil shale and which...
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4248301 |
Micellar crude oil displacement with partitioned hydrocarbon sulfonates
Micellar crude oil displacement efficiency is improved by partitioning the hydrocarbon sulfonate surfactants used in the formulation of micellar fluids between aqueous and oleic phases of a...
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