Patents
Literature
Eureka-AI is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
Eureka AI

2242results about How to "Enhanced overall recovery" patented technology

Complex foam extinguishing agent for coal mine

InactiveCN102614615AHigh bonding strengthReduce the drainage rateFire extinguisherSodium bicarbonateMass ratio
The invention discloses a complex foam extinguishing agent for a coal mine and belongs to the technical field of fire prevention and extinguishing. The extinguishing agent is prepared from the following raw materials: main materials are 40 to 60 percent aqueous solution of ammonium bicarbonate or sodium bicarbonate and concentrated sulfuric acid in a solute mass ratio of 2:1-3:1, and auxiliary materials are a stabilizer and a foamer, wherein the auxiliary materials are 0.1 to 2 percent of the total weight of the main materials. Through a test, the extinguishing agent has the foaming coefficient of 20-200 and the foam stabilizing time of more than or equal to 2.5 hours. According to the foam extinguishing agent, the foam of inert gas carbon dioxide is applied to fire prevention and extinguishing of the coal mine, and the foam is diffused in a fire area and fills a fire space, so that the oxygen concentration in the fire area is rapidly reduced, fire is extinguished due to oxygen deficiency in the fire area, temperature is reduced and a fire extinguishing effect is good. The technology also can be applied to coal bed transformation, CO2 foam is easily absorbed by coal to displace partial methane, the recovery ratio of coal seam gas is improved, and CO2 is acid to reduce the generation of secondary precipitates, so that a gas drainage effect is improved. The complex foam extinguishing agent is simple and feasible, and low in cost.
Owner:抚顺正工矿业科技发展有限公司

Method for enhancing recovery ratio through three-dimensional streamline regulation of water drive reservoir

The invention discloses a method for enhancing recovery ratio through three-dimensional streamline regulation of a water drive reservoir. The method is characterized by comprising the following steps: identifying the planer development segment and vertical development segment of a preferential seepage channel to quantificationally calculate sampling parameters; establishing a three-dimensional geologic model comprising the characteristics of the preferential seepage channel, establishing a reservoir numerical simulation model, and finely determining a residual oil distribution characteristic under current heterogenous condition through reservoir numerical simulation; carrying out pattern modification and optimized water shutoff and profile control design; and determining whether layered injection and recovery is required according to water adsorption characteristics of a vertical water well and liquid generation characteristics of an oil well by utilizing the reservoir numerical simulation result. In the invention, on the basis that the preferential seepage channel is blocked through deep profile control and water shutoff, the planer flow line direction is changed through the combination water shutoff and profile control with pattern modification optimization, water shutoff and profile control are optimally combined with subdivided development layers and layered injection and recovery optimization to control and regulate the density of vertical flow lines, and the purpose of maximally control underground flow lines is achieved through the synergistic effect of different means.
Owner:CHINA PETROLEUM & CHEM CORP +1

Intelligent oil well simulation experiment system and working method

InactiveCN102022112AEasy to operateFast and easy data collection and processingBorehole/well accessoriesTraffic volumeAutomatic control
The invention discloses an intelligent oil well simulation experiment system and a experiment method. The intelligent oil well simulation experiment system comprises a three-dimensional heterogenous reservoir simulating box, a wellbore hole simulator, a fluid injecting module, a fluid generating module, a data acquiring module, an automatic control module, a constant temperature module, a saturation probe, a pressure sensor and a temperature sensor. The wellbore hole simulator is arranged in the three-dimensional heterogenous reservoir simulating box, the automatic control modules realizes the real-time extraction and injection on the wellbore hole simulator through controlling the fluid injecting module and the fluid generating module; and the data acquiring module is used for monitoringinjected and extracted fluid, and monitoring the saturation, the temperature and the pressure in the simulating box in real time, and a computer is used for optimizing and analyzing the monitoring data, controlling the injection and extraction flow in real time through the automatic control module, simulating and realizing multilayer comingling production, sectional extraction of a horizontal well, extraction of a multi-branch well and control strategy of an injection and extracting well, and perfecting the researches of real-time optimization, real-time regulation and the like of the production.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)

Ultrasonic-assisted reservoir stratum chemical blockage removal experimental facility and experimental method

ActiveCN102031955AEfficient chemical plugging removal experimentRapid chemical plugging removal experimentFluid removalSound producing devicesUltrasonic oscillationUltrasonic generator
The invention discloses an ultrasonic-assisted reservoir stratum chemical blockage removal experimental facility and an experimental method. The experimental facility comprises a rock core clamp holder, a ring compression feed device, an ultrasonic energy converter, an ultrasonic generator, a chemical reagent storage tank connected with a liquid inlet of the rock core clamp holder by a conveying pipeline, a water storage tank, an oil storage tank and a liquid container connected with a liquid outlet of the rock core clamp holder. The experimental method comprises the following steps of: 1, pretreating a tested rock core; 2, testing the initial permeability of the rock core through water drive; 3, polluting the rock core; 4, testing the permeability of the polluted rock core through the water drive; 5, performing an ultrasonic-assisted chemical reagent blockage removal experiment; 6, testing the permeability of the rock core subjected to the blockage removal through the water drive; 7,performing the ultrasonic-assisted chemical blockage removal experiment under the condition of ultrasonic oscillation with different frequencies and amplitudes; and 8, processing data. The ultrasonic-assisted reservoir stratum chemical blockage removal experimental facility has reasonable design, complete functions and high using effect, is easy and convenient to arrange and operate, and can realize the pulse fluctuation of the chemical blockage removal under the action of the ultrasonic oscillation.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)

Non-linear associating water-soluble quadripolymer, and preparation and use thereof

The invention discloses a non-linear associated water soluble quadripolymer as well as a preparation method and use thereof, comprising: adding 20 parts of acrylamide, 1-20 parts of nionic monomer or/and cationic monomer, 0.1-15 parts of macromonomer, 0.05-10 parts of hydrophobic monomer, 0.1-50 parts of surfactant and 60-1000 parts of deionized water to a three-necked reaction flask, adjusting the pH to be 3-9, adding 0.002-1 part of initiator (persulphate) at 30-75 DEG C after introducing N2 for 30min, reacting for 8-36h to obtain the quadripolymer PACH, diluting with water, and obtaining concentrated PACH solution. The macromonomer with a long chain and the hydrophobic monomer with a molecular association function are simultaneously introduced in a copolymer PACH, which can obtain the best synergistic viscosifying between rigid conformation of a molecular chain and molecular association and salt resistance. The non-linear associated water soluble quadripolymer is obtained. The copolymer is prepared into aqueous solution with the mass concentration of 0.2-3g/l and the surfactant concentration of 0.01-2mmol/l, added to a mixing vessel with a stirring device and evenly stirred at the room temperature to obtain a viscosified, salt-resistant and shear-resistant polymer oil displacement agent. The PACH has dual functions of a viscosifier and a high molecular surfactant; minute amount of a low molecular surfactant is added to the PACH solution, thus improving the apparent viscosity of the solution, reducing the surface tension of solution and the water-oil interfacial tension, and being beneficial to improving the crude oil recovery ratio. A copolymer PABE is prepared into the aqueous solution with the mass concentration of 0.05-7% to obtain high molecular surfactant with excellent surface activity, and the high molecular surfactant is used as an emulsifier, a demulsifier, a solubilizer and a wetting agent.
Owner:CHENGDU UNIVERSITY OF TECHNOLOGY

Modified expansion-slowing particle profile controlling agent and preparation method as well as application thereof

The invention relates to a modified expansion-slowing particle profile controlling agent used for deep profile controlling and flooding of an oilfield and water plugging of an oil well, a preparation method thereof and application in the field of oil exploitation. The modified expansion-slowing particle profile controlling agent comprises the following components in parts by weight: 4-20 parts of a water-soluble monomer, 10-50 parts of an oil-soluble monomer, 0.01-1 part of a water-soluble cross-linking agent, 0.02-2 parts of an oil-soluble cross-linking agent, 1-10 parts of a surfactant, 0.05-0.5 part of a water-soluble initiating agent, 0.001-0.25 part of an oil-soluble initiating agent, 0.05-0.5 part of a coupling agent, 0-5 parts of alkaline and 30-70 parts of de-ionized water. The modified expansion-slowing particle profile controlling agent overcomes the disadvantages of the conventional expansion type particles that water-absorbing expansion speed is high, the particles after expanding are too hard, and the particles cannot be used for deep profile controlling of the oilfield; the particle profile controlling agent is applied to water plugging of the oil well and deep fluid diversion of the oilfield with a high water content, improves displacement effects of water flooding, polymer flooding and surfactant flooding, and increases recovery efficiency of oil accumulation.
Owner:大庆市新万通科技开发有限公司

Nano composite high-temperature-resistant extraction aid for thickened oil and super-thickened oil recovery and preparation method thereof

The invention discloses a nano composite high-temperature-resistant extraction aid for thickened oil and super-thickened oil recovery. The nano composite high-temperature-resistant extraction aid is prepared from 3-8 weight percent of modified nano-silica, 3-8 weight percent of petroleum sulfonate, 10-40 weight percent of a viscosity reducer, 5-15 weight percent of an emulsifier, 2-10 weight percent of a surface wetting agent, 2-10 weight percent of a penetrating agent, 5-10 weight percent of a high polymer modifier, 1-8 weight percent of a catalyst and the balance of water. The preparation method comprises the following steps: polymerizing the petroleum sulfonate, viscosity reducer, a promoting agent and the catalyst at the temperature of 60-150 DEG C for 2-6 hours according to a ratio, adding the modified nano inorganic aid, and uniformly mixing; and finally, adding the emulsifier, surface wetting agent, penetrating agent, high polymer modifier and water according to the ratio, and mixing for 1-2 hours. The nano composite high-temperature-resistant extraction aid for thickened oil and super-thickened oil recovery has high high-temperature resistance and excellent emulsification and salt resistance, the production efficiency can be greatly improved, and the recovery rate is reduced.
Owner:GUNGHO CHARGE TIANJIN REFINED PETROLEUM TECH DEV

Viscosity-variable diverting acid for improving stratigraphic acidified section

InactiveCN102020983AViscosity auto-increasingConing reductionDrilling compositionBetaineActive agent
The invention discloses viscosity-variable diverting acid for improving a stratigraphic acidified section. An oil layer is uniformly acidified, and the coning of acid liquor in a high permeable stratum is reduced to ensure that part of acid liquor enters middle and low permeable target stratums so as to improve and expand an acidified sweep section. In the viscosity-variable diverting acid, each component is controlled by a pH value, and the viscosity-variable diverting acid mainly comprises the following components in part by weight: 100 parts of basic acid liquor, 3 to 5 parts of long chain alkylamide propyl betaine, 1 to 3 parts of corrosion inhibitors, 0.5 to 1 part of ferrous stabilizer and 0.5 to 1 part of clay stabilizer. The viscosity-variable diverting acid consisting of the components is injected into a target oil layer. In the acidification process, the initial viscosity of the acid liquor is lower, and the initial viscosity at the temperature of 20 DEG C is 10 to 15mPa.s, the acid liquor is easy to enter the high permeable stratum, and subsequent unreacted low-viscosity acid liquor automatically diverts to enter the middle and low permeable stratums. The long chain alkylamide propyl betaine serving as a diverter is an ampholytic surfactant, does not have any macromolecular residues after a gel is broken and does not have any secondary damage to a reservoir.
Owner:CHINA PETROLEUM & CHEM CORP +1
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products