60results about How to "Enhanced Oil Recovery" patented technology

An electrical current generating system is disclosed that includes a fuel cell operating at a temperature of at least about 250° C. (for example, a molten carbonate fuel cell or a solid oxide fuel cell), a hydrogen gas separation system or oxygen gas delivery system that includes a compressor or pump, and a drive system for the compressor or pump that includes means for recovering energy from at least one of the hydrogen gas separation system, oxygen gas delivery system, or heat of the fuel cell. The drive system could be a gas turbine system. The hydrogen gas separation system or the oxygen gas delivery system may include a pressure swing adsorption module.

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 periodically injecting simultaneously or alternately a non-condensible gas and an aqueous solution of foaming composition to form a combined foam under ground or periodically injecting the combined foam formed beforehand by the gas and said aqueous solution above ground. The aqueous solution of foaming composition comprises an alkali, a surfactant and a polymer. Thereafter, an aqueous polymer solution used as a protecting-slug is injected into the formation; followed by continuing water-flooding.

The invention relates to synthesis of polyoxyethylene fatty alcohol ether sulphonate, and complex formulation for tertiary oil recovery displacement agent, and belongs to chemical displacement agent technic field. The invention discloses a synthesis method of a surface active agent for tertiary oil recovery for a high-temperature, high salinity and high calcium and magnesium ion oil reservoir, and complex formulation for highly effective displacement agents. Polyoxyethylene fatty alcohol ether sulphate is reacted with a sulfonating agent under the action of catalyst to produce polyoxyethylene fatty alcohol ether sulphonate. Polyoxyethylene fatty alcohol ether sulphonate are used as main material which is complex formulated with heavy alkyl benzene sulfonate, water, polymerisate, etc. Compared with existing products, the displacement agent of the invention in the three-high system reduces the oil-water boundary tension ultra-low (10<-3>mN/m), and the boundary tension is not affected by temperature, degree of mineralization and the concentration of calcium and magnesium ions.

The invention relates to alkylphenol sulfonic polyoxyethylene ether succinate monoester sulfonate and the preparation method thereof, mainly aiming at solving the problems that current oil displacement agent containing surfactant is poor in oil displacement efficiency under high temperature with the existence of high salt and that the oil displacement agent contains alkali and causes damages to the stratum and the oil field and erodes the equipment and the pipes, which results in high production cost. The invention adopts alkylphenol sulfonic polyoxyethylene ether succinate monoester sulfonate with general molecular formula (I)to solve the problem; wherein M is alkali metal; R is alkyl from C1-C22; n is any integer from 1 and 20. The alkylphenol sulfonic polyoxyethylene ether succinate monoester sulfonate can be applied to the production of tertiary oil recovery in oil fields.

The invention discloses a surfactant compounded system with ultralow interfacial tension and a preparation method of the surfactant compounded system, belonging to the technical field of surfactants. The surfactant compounded system comprises the following components in percentage by mass: 10-33% of a primary surfactant, 7-23% of a synergist, 1-4% of a stabilizer and the balance of water, wherein the primary surfactant is an ampholytic surfactant, the synergist is a nonionic surfactant, and the stabilizer is an anionic surfactant. By using a small amount of the surfactant compounded system with ultralow interfacial tension, the oil-water interfacial tension reaches an order of magnitude of 10<-4>mN/m or lower within a short time; the surfactant compounded system with ultralow interfacial tension is applicable to tertiary oil recovery of a low-permeability or ultralow-permeability reservoir stratum so as to enhance oil recovery; the surfactant compounded system with ultralow interfacial tension also can be used for decompression and augmented injection of a water wall and viscosity reduction of thickened oil; the system is alkali-free and does not damage the stratum when used; the surfactant compounded system with ultralow interfacial tension can be used in industries such as a cleaning agent, an emulgator and a deinking agent; the raw materials are easily available and the system is low in price, good in performance and suitable for industrial production.

The invention relates to alkylphenol sulfonic polyoxyethylene aether sodium sulfovinate and the preparation method thereof, mainly aiming at solving the problems that current oil displacement agent containing surfactant is poor in oil displacement efficiency under high temperature with the existence of high salt and that the oil displacement agent contains alkali and causes damages to the stratum and the oil field and erodes the equipment and the pipes, which results in high production cost. The invention adopts alkylphenol sulfonic polyoxyethylene aether sodium sulfovinate with general molecular formula (I)to solve the problem; wherein M is alkali metal, ammonium group or amidocyanogen; R is alkyl from C1-C22; n is any integer from 1 to 30. The alkylphenol sulfonic polyoxyethylene aether sodium sulfovinate can be applied to the production of tertiary oil recovery in oil fields.

A functional polymeric surfactant reinforced combination flooding composition contains the following ingredients, by weight, 0.05-0.5% of polymer, 0.03-0.5% of a sulfonate surfactant, 0.01-0.3% of a functional polymeric surfactant, 0.0-0.3% of a nonionic surfactant, 0.2-1.5% of alkali and the balance water. The functional polymeric surfactant is a copolymer of an acrylamide monomer and/or a hydrophilic monomer and/or a functional monomer. According to the reinforced combination flooding composition, multiple oil-displacement mechanisms are combined. In a low-concentration system, the purpose that a three-compounds combination flooding has higher crude oil recovery can be achieved. After polymer flooding, oil reservoir also has a certain effect of raising crude oil recovery.

An aluminium citrate type additive for recovering petroleum has the formula of M0-2Al1-3C6H4-10O7N1-4X0.1-9, and is prepared through reaction of Al-containing aqueous solution with the aqueous solution containing radical of citric acid, adding alkaline substance or putting in ionic exchange resin for stabilizing and regulating pH value. Its advantages are high content of Al, excellent performanceand high stability.

The subject invention provides systems and apparatuses for producing microbe-based compositions that can be used in the oil and gas industry, environmental cleanup, as well as for other applications. More specifically, the present invention includes biological reactors, equipment, and materials for fermenting microbe-based compositions.

The invention provides a preparation method of a micro emulsion polymer for displacement control of an oil deposit deep part with high temperature and mineralization. The preparation method comprises the following steps of: on the basis of preparing the micro emulsion polymer by adopting a photopolymerication, adding 3-acrylamide group-3-methyl sodium butyrate, 2-acrylamide group-2-methyl propanesulfonic acid and other temperature-resistant salt-resisting materials and water-soluble anion monomers into a water solution containing acrylamide monomers; adding a dispersion agent; forming a water-oil mixed emulsion in a mixed medium of a surfactant and a solvent; and decomposing an initiator to initiate the emulsion for polymerizing to form the micro emulsion polymer by using a photopolymerication mode under the action of controllable temperature. By utilizing the capability of the micro emulsion polymer dispersed into injected water at any concentration, entering a stratum deep part and forming jelly under the action of the cross linking to block a pore throat to effectively block a high-permeation stripe of the stratum, the invention enlarges the swept volume of water, remarkably improves the crude oil recovery ratio for developing the oil deposit driven by water, and is applied to deep part profile control of the oil deposit with high temperature and mineralization.

The invention provides a high-temperature high-pressure shaft simulator comprising a circulating mechanism, a temperature and pressure control mechanism, and a data measuring and acquiring mechanism. The circulating mechanism comprises a reciprocating circulating pump, a circulating oil pipe and a sample distributor-converter; the reciprocating circulating pump is connected with inlet and outlet ends of the circulating oil pipe; the sample distributor-converter is connected with the inlet end of the circulating oil pipe; the circulating oil pipe has an ascent segment and a descent segment connected through a transitional segment; the temperature and pressure control mechanism comprises an oil bath circulating sleeve, an oil bath thermostat and a pressure regulating pump; the oil bath circulating sleeve sleeves the circulating oil pipe and is connected with the oil batch thermostat; the pressure regulating pump is connected with the sample distributor-converter; the data measuring and acquiring mechanism comprises a plurality of sensors connected to the circulating oil pipe. The high-temperature high-pressure shaft simulator has the advantages that a high-temperature high-pressure underground environment and flowing of produced fluid in a shaft during production can be simulated, the influence of different production conditions upon frictional resistance and flowing form during crude oil lifting is studied through real-time monitoring, and the simulator is of promising engineering application value and academic value.

The invention discloses a method for producing oil by changing a bottom water reservoir oil well into a water dumping well and an oil production well system. In the oil production method, a well is digged on a strong bottom water reservoir; the depletion development is carried out; and when bottom water is broken through to the oil well, an oil layer and a water layer below the oil layer are drilled out to guide the bottom water to the oil layer to carry out oil displacement, so that crude oil is produced from other wells. According to the invention, the oil well which is seriously flooded is subjected to secondary well drilling, the oil layer is communicated with the water layer, the bottom water energy is sufficiently utilized, the bottom water is guided into the oil layer to carry out oil displacement and the crude oil is produced from the adjacent wells. The invention not only solves the problems caused by a water cone, but also sufficiently utilizes the natural energy of the bottom water, guides the bottom water to the oil layer to displace the crude oil and improves the recovery ratio of the crude oil.

The invention relates to a micro-emulsion polymer for in-depth profile control and oil displacement of reservoirs and a preparation method thereof. On the basis of a method for preparing a polymer by adopting a photopolymerization reaction, water-solubility anion monomers are added into aqueous solution containing acrylamide monomers, a dispersing agent and a cross-linking agent are added, an oil-water mixed emulsion is formed in a mixed medium of a surfactant and a solvent, and after an imitating agent is decomposed by ultraviolet light in a mode of photopolymerization reaction at the controlled temperature, the emulsion polymerization is initiated so as to form the micro-emulsion polymer. The micro-emulsion polymer prepared by the invention is suitable for reactions under the condition of multiple environments, and has the characteristics of safe and stable reaction systems, simple, easy and convenient operation, flexible adjustment of reaction process and reaction time, high production efficiency, low energy consumption, no pollution and the like. The micro-emulsion polymer of the invention can be dispersed into injection water at any concentration and can enter deep strata to form gel under the action of the cross-linking agent, so that the capability of blocking pore throats is formed gradually, high-permeability stripes of the strata are blocked effectively, the swept volume of the water is enlarged, and the crude recovery ratio of developing the reservoirs through water flooding is improved obviously.

The invention provides a high-temperature-resistant gene engineering bacterium for producing an extracellular water-insoluble polysaccharide and application thereof, which relates to the application of a biological engineering technology to microbial enhanced oil recovery. The gene engineering bacterium is a high-temperature-resistant gene engineering bacterium for producing an extracellular water-insoluble polysaccharide and has the collection number of CGMCC No.3909; a recipient strain of the gene engineering bacterium is a JD bacterium (Enterobacter sp.), which is not resistant to high temperature and can produce the extracellular water-insoluble polysaccharide at the temperature of 37 DEG C; and a donor bacterium of the gene engineering bacterium is a GW (Geobacillus kaustophilus) bacterium of a thermophile bacterium. Genome DNA (Deoxyribonucleic Acid) of the GW bacterium is transferred into the JD bacterium by adopting an electric shock transformation method, so that a gene engineering bacterium which can produce the extracellular water-insoluble polysaccharide at the high temperature of over 50 DEG C is obtained. The gene engineering bacterium can be applied to profile control of higher temperature oil reservoirs. The aim of increasing the crude oil recovery ratio can be fulfilled by selectively plugging a high-permeability zone. The invention also provides an effective method for expanding the application range of a bacterial strain applied to microbial enhanced oil recovery.

The invention discloses a magnetic injection increase and depressurization test system which comprises a flow device, a drive device, a buffer device, a magnetic processing device and a constant temperature device, wherein the flow device is used for placing a test rock core and supplying ring crush to the test rock core; the drive device is used for supplying different displacement pressures or liquid flow rates to the test rock core; the buffer device is used for storing water for test, and the drive device drives the water for test to the rock core; the magnetic processing device is used for supplying different magnetic field strengths to the test rock core; the constant temperature device is used for supplying constant temperature to the test rock core; the drive device sets the displacement pressure or the liquid flow rate and drives the water for test in the buffer device to flow through the magnetic processing device, and then the water for test is pressed to the test rock core in the flow device; and the constant temperature device supplies constant temperature to the buffer device, the magnetic processing device and the flow device. With adoption of the embodiment of the invention, the rock core permeability and pressure gradient under different magnetic field strengths and different temperatures can be conveniently, rapidly and accurately measured; and the magnetic injection increase and depressurization test system can be used for researching a low permeation oil reservoir magnetic injection increase and depressurization mechanism, guiding oilfield field application and enhancing oil recovery factor.

The invention discloses pseudomonas aeruginosa and particularly discloses pseudomonas aeruginosa Gx preserved in CGMCC (China General Microbiological Culture Collection Center) with the preservation number of CGMCC NO. M2016790 on December 30th 2016. The invention also discloses applications of the pseudomonas aeruginosa Gx to asphalt degradation and transformation, colloid degradation and transformation and microbial enhanced oil recovery. The pseudomonas aeruginosa Gx disclosed by the invention has a strong degradation ability on colloid and unknown macromolecule components in asphalt and crude oil, strong surface active material synthesizing ability and acid producing ability and large oil displacing potential in the microbial enhanced oil recovery of high-asphalt content heavy oil reservoirs; and therefore, the pseudomonas aeruginosa Gx is capable of remarkably reducing the adhesion of the crude oil and increasing the gasoline and diesel oil yield in crude oil refining.

The invention provides a segmented acid fracturing water controlling production increasing method for a carbonate rock fractured-vuggy reservoir deep open hole horizontal well, and belongs to the technical field of well completion of oil-gas wells. The segmented acid fracturing water controlling production increasing method comprises the steps: the number of segments of horizontal well segmented acid fracturing is determined; according to the number of the segments, the horizontal well is subjected to segmented perforation acid fracturing; and all the segments subjected to segmented perforation acid fracturing are subjected to water controlling production. Determination of the number of the segments, overall perforation, segmented fracturing and segmented water controlling are realized, the cost-benefit ratio is optimized, the oil recovery degree of a horizontal well control area is increased, the oil production of the carbonate rock fractured-vuggy reservoir deep open hole horizontalwell is overall increased, the input-output ratio of segmented acid fracturing of the deep open hole horizontal well is increased, oil producing and water controlling are facilitated, and applicationprospects are wide.

The invention relates to an amphoteric crosslinked polymer coil and a preparation method thereof. The method comprises the following steps: dissolving anionic monomer, cationic monomer, nonionic monomer and cross-linking monomer in water according to the mole ratios of them being 2.5-25:2.5-25:50-95:0.1-6 to prepare a water phase with the total mass fraction of 2.0%-60%, dissolving a dispersing agent in a base oil to prepare an oil phase with the content of 1.0%-50.0%; mixing the two phases to obtain a suspension dispersion, wherein the total mass fraction of the anionic monomer, cationic monomer and nonionic monomer in the dispersion are controlled to be 10.0%-40.0%, the mass fraction of the cross-linking monomer is 0.001%-2.0%, and the mass fraction of the dispersing agent is 1.0%-15.0%; in the inert environment, carrying out polymerization reaction to obtain the amphoteric crosslinked polymer coil. The amphoteric crosslinked polymer coil is particularly suitable for higher permeability oil reservoirs or medium and low permeability oil reservoirs with relatively high permeability strips and the recovery rate of crude oil can be improved.

The invention relates to the technical field of oil field tertiary oil recovery, in particular to a medium-phase microemulsion and a preparation process and application thereof, and the medium-phase microemulsion comprises the following components: a main agent, fatty alcohol polyoxyethylene polyoxypropylene sodium sulfonate, an auxiliary agent and water, the main agent comprises at least one of sodium alkyl benzo dicyclohexylsulfonate, sodium alkyl acenaphthene sulfonate, sodium alkyl biphenyl sulfonate, sodium alkyl fluorene sulfonate and sodium alkyl indane sulfonate, the medium-phase microemulsion is used for oil displacement, the crude oil recovery rate can be greatly increased, and meanwhile the cost is reduced.

The invention provides a method for improving the recovery rate of crude oil in an oil well. The crude oil in the oil well is recovered by using an oil displacement agent formed from a polymer and a surfactant, wherein the surfactant is cocoamidopropyl betaine; and the polymer is a weak gel formed by performing cross-linking on one polymer, two organic cross-linking agents and one polycoagulant agent, wherein one polymer is polyacrylamide, the two organic crosslinking agents are chromium acetate and resorcinol, and the polycoagulant is ammonium chloride. A recovery method of the crude oil in the oil well comprises the following ten steps: preparation of the polymer and the surfactant, preparation work before crude oil recovery, primary injection on water and a weak gel solution, secondaryinjection, tertiary injection, injection of the surfactant solution, a step of driving the weak gel solution and the surfactant solution to an oil displacement zone, forward and reverse injection andthe like. The method for improving the recovery rate of the crude oil in the oil well can increase water viscosity, reduce a water-oil mobility ratio, inhibit water fingering and flooding, reduce oil-water interface tension, improve wettability, and reduce water injection well pressure, thereby improving the recovery rate of the crude oil.

The invention discloses a high temperature resistant polymer gel for medium and low temperature gelation and a preparation method and application thereof, and relates to the field of oilfield chemistry. The high temperature resistant polymer gel for the medium and low temperature gelation is prepared from a raw material comprising the following components: acrylamide-2-acrylamido-2-methylpropanesulfonic vinyl-pyrrolidone terpolymer, a heat stabilizer, a crosslinking agent, benzenediol, urotropine and water, wherein the heat stabilizer is thiourea and cobalt chloride, and the crosslinking agentis chromium acetate or zirconium acetate. The high temperature resistant polymer gel for the medium and low temperature gelation has gelation strength of G or higher at a medium and low temperature,can be stabilized for 90 days at a temperature of 140 DEG C and above, meets the operation requirements of sealing and blocking of the medium and low temperature oil reservoir steam flooding, has goodapplication prospects in the high-permeability layer sealing and blocking of the medium and low temperature heavy oil reservoir steam flooding, and can significantly improve an oil recovery ratio.