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35 results about "Filtration coefficient" patented technology
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Filtration coefficient (Kf) a measure of a membrane's permeability to water; specifically, the volume of fluid filtered in unit time through a unit area of membrane per unit pressure difference, and it defined as the glomerular filtration rate (GFR) for both kidney per millimeter of mercury (mmHg) of filtration pressure. Therefore, the glomerular filtration rate is equal to the filtration pressure multiply the filtration coefficient. The normal filtration coefficient for a healthy adult human is 12.5 ml per minute per mmHg of filtration pressure.
Socialized filtering method on basis of preference model
InactiveCN102521420AImprove accuracyReduce complexitySpecial data processing applicationsThe InternetData mining
The invention discloses a socialized filtering method on the basis of a preference model and mainly solves the problems of a great amount of targeted users, a complex social relationship and low accuracy of a filtering method in the prior art. The invention adopts the implementation scheme that the socialized filtering method on the basis of the preference model comprises the following steps of: calculating an influence factor of group members on a group by analyzing a socialization relationship among the group members; calculating an influence factor of preference objects of the group members to the group by analyzing the distribution of the preference objects of the group members in the group; integrating the two influence factors and carrying out character representation on the preference model of the group together to obtain a weighted influence vector of the group; and then calculating a filtration coefficient and judging the recommended condition to filter the common and like preference of the group, so that the accuracy and the efficiency of the socialized filtering method are improved. The socialized filtering method has the advantage of analysis on the preference model ofthe group. The recommendation of objects in different fields can be realized on the Internet only by modifying and acquiring keyword vectors in the fields.
Owner:XIDIAN UNIV
Method for measuring filtration coefficient of supercritical carbon dioxide fracturing fluid
InactiveCN104568699AMeet high temperatureFulfil requirementsSurface/boundary effectPermeability/surface area analysisFracturing fluidHigh pressure
The invention belongs to the technical field of unconventional oil and gas stimulation, particularly relates to a method for measuring a filtration coefficient of supercritical carbon dioxide fracturing fluid, and aims to determine the filtration coefficient of supercritical carbon dioxide fracturing fluid. The method comprises the following steps: (1) placing cores; (2) exhausting gas in an upper chamber of an intermediate container, and filling methane into the upper chamber of the intermediate container; (3) applying pressure to a lower chamber of the intermediate container; (4) injecting methane into the cores; (5) emptying methane in the upper chamber of the intermediate container, and injecting carbon dioxide; (6) applying confining pressure; (7) applying back pressure; (8) injecting carbon dioxide to the cores; (9) calculating the filtration rate and filtration coefficient. According to the method for measuring a filtration coefficient of supercritical carbon dioxide fracturing fluid, the temperature and pressure are adjustable, the high-temperature and high-pressure environment requirements for carbon dioxide to reach the supercritical state are met, and the filtration law of supercritical carbon dioxide fracturing fluid at different temperatures can be studied truthfully.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)
Method for fast confirming hydraulic parameters of unsaturated soil
InactiveCN101487787APrevent precipitationShorten test timePermeability/surface area analysisCapillary pressureTime changes
The invention discloses a method for quickly determining the hydraulic parameters of unsaturated soil, relating to a method for testing the hydraulic parameters of unsaturated soil. The method mainly comprises the following steps of: (1) developing a multi-step flow test under a certain condition to obtain the relation curve between the saturation and the time change, simultaneously, establishing a linear viscoelastic model that accurately describes the saturation of the specimen along the time change under the condition; (2) calculating the water tolerance Ci at unit pressure and the characteristic time tci under the effect of the capillary pressure pci; and (3) calculating the saturation (Sr)eqi and the filtration coefficient ki when the specimen is in the balance state under the effect of the capillary pressure pci. The invention relates to a method for determining the hydraulic parameters of unsaturated soil based on the multi-step flow test result under a certain condition. The method is also suitable to environmental evaluation of underground pollutants, rainfall infiltration and other fields related to unsaturated soil.
Owner:INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
Method for measuring filtration coefficient of oversized-grain-diameter coarse-grained soil
InactiveCN103217371ALarge particle size rangeAvoid damagePermeability/surface area analysisSoil scienceOsmotic coefficient
The invention relates to a parameter measuring method of a water conservancy engineering material, and particularly relates to a method for measuring a filtration coefficient of oversized-grain-diameter coarse-grained soil (the grain diameter d85 of which is more than or equal to 60mm and is less than or equal to 100 mm), and the IPC international patent classification is E02D1 / 04 and E02D33 / 00. The method provided by the invention adopts a specialized measuring device which comprises a testing tank, an automatic compression system 11 and a pressure measuring tube 12, wherein the wall of the testing tank is provided with multiple pressure measuring holes, the pressure measuring holes in the tank wall are utilized as vent holes in soil body exhaust saturation and can cooperate with vent holes in the tank top and the tank bottom to accelerate ventilation, and thus a sample rapidly achieves a saturation condition. A large number of tests prove that the measuring method provided by the invention has the advantages that hot water at 25-40 DEG C is utilized to saturate the oversized grain diameter sample rapidly, and the influence to chemical and physical stability of the sample is smallest.
Owner:超飞凡科技(天津)有限公司
Method of removing spike noise from ground nuclear magnetic resonance data based on synergic filtration
ActiveCN109100813AImprove accuracyImprove data qualityDetection using electron/nuclear magnetic resonanceAcoustic wave reradiationHadamard transformUltrasound attenuation
The invention relates to a method of removing spike noise from ground nuclear magnetic resonance data based on synergic filtration. The method comprises the steps of judging whether all measurement data under a pulse moment has the spike noise through a 3 sigma rule, dividing the measurement data into a group containing the spike noise and a group containing no spike noise, performing discrete cosine transform and Hadamard transform to form two transform domain coefficients, calculating a filtration coefficient through the transform coefficient of the data without the spike noise, performing filtration on the coefficient of the data containing the spike noise, and at last, performing Hadamard and discrete cosine inverse transform on the filtered coefficient of the data containing the spikenoise to remove the spike noise. According to the method, the data containing a spike noise time period is not deleted or replaced, and a relaxation attenuation characteristic of a ground nuclear magnetic resonance signal is not changed. Through testing, the method has high accuracy of removing the spike noise from the ground nuclear magnetic resonance data and improves extraction precision of asignal characteristic parameter.
Owner:JILIN UNIV
Calculation method for dynamic comprehensive filtration coefficient of fracturing acidizing in fractured reservoir
The invention discloses a calculation method for dynamic comprehensive filtration coefficient of fracturing acidizing in fractured reservoir. The calculation method for dynamic comprehensive filtration coefficient of fracturing acidizing in fractured reservoir comprises the following steps that: (1) calculating a matrix filtration coefficient Cmt of the considering acid wormhole; (2) calculating the natural fracture filtration coefficient (Cft0) (i) i ( / i) in initial state and the comprehensive filtration coefficient Ct0 of the fracturing acidizing in initial state; (3) calculating the effective operating distance (Lefn) (i) i ( / i) of the acid liquor in the i natural fracture of a Tn time step; (4) calculating the i natural fracture width (wn) (i) i ( / i) of the Tn time step; (5) calculating the filtration coefficient (Cftn) (i) i ( / i) of the i natural fracture of the Tn time step; (6) calculating the comprehensive filtration coefficient Ctn of the fracturing acidizing of the Tn time step. The calculation method for dynamic comprehensive filtration coefficient of fracturing acidizing in fractured reservoir considers the natural fracture width variation caused by the acidliquor corrosion on the wall surface of the natural fracture, the principle is reliable, the calculation is simple, the natural fracture with random and complicated distribution can be processed, thefiltration speed of the acid liquor in the fracturing acidizing process can be accurately and quickly calculated, thereby providing an effective guidance for the design of the fracturing acidizing scheme.
Owner:SOUTHWEST PETROLEUM UNIV
Clean fracturing fluid applied to hydraulic fracturing production increasing technology of oil-gas well
InactiveCN102093872AReduce harmImprove breaking performanceDrilling compositionSodium salicylatePotassium
The invention discloses a clean fracturing fluid applied to a hydraulic fracturing production increasing technology of an oil-gas well. The clean fracturing fluid comprises the following components in percentage by weight: 3.0 to 5.0 percent of potassium chloride, 1.0 to 3.0 percent of ammonium chloride, 0.4 to 0.6 percent of sodium salicylate and 92.0 to 95.0 percent of water. The clean fracturing fluid has high gel breaking capability and good de-filtration effect and is convenient for flowing back after gel breaking, a de-filtration coefficient and a filtration rate of the clean fracturing fluid are close to those of a guar gum fracturing fluid and a fenugreek gum fracturing fluid, and damage to the stratum is reduced.
Owner:武侯区巅峰机电科技研发中心
Dynamic filtration instrument for fracturing acidizing working fluid
The invention discloses a dynamic filtration instrument for a fracturing acidizing working solution, which comprises an injection system and an outlet metering system, wherein the output end of the injection system is connected with a temperature and pressure test control system; a model system is arranged in the temperature and pressure test control system; the outlet metering system is connectedto the input end of a back pressure control system; and the output ends of the injection system, the temperature and pressure test control system, the model system, the outlet metering system and theback pressure control system are electrically connected with the input end of the data acquisition system through wires. The container, the clamper and the corresponding pipe valve piece pass througha constant-temperature box system, the whole system reaches the simulated formation temperature condition, various experiments are carried out, the following parameters: the filtration coefficient, the filtration speed, the permeability damage rate, the filtrate invasion depth and the like, can be measured through a dynamic or static method, and the formation condition can be simulated to evaluate the permeability damage of working fluid such as fracturing fluid and the like to the formation.
Owner:JIANGSU TUOCHUANG SCI INSTR CO LTD
Method for air-water backwashing and surface cleaning natural filter bed filter material and a cleaning control system thereof
InactiveCN101279157AImprove qualityImprove purification functionLoose filtering material filtersGravity filtersSurface cleaningWater quality
A washing method of an air-water backwashing surface of filter materials of a natural filtering bed and a washing control system thereof are provided by the invention. By the use of air lift generated by compressed air, piping generated by water power and separation generated by the mixture of the air and the water, the compact filter materials and a silt layer covered on the natural filtering bed are dispersed to cause the recombination of the filter materials. Meanwhile, with the running of river water, the silt with light weight and sediment are discharged out of the filtering bed, thus increasing the filtration coefficient of a permeable layer and the vertical infiltration velocity of surface water to underground. The control system comprises a seepage well of the natural filtering bed, an air distribution system which generates the air lift and a water distribution system and a control system which generate the piping. By adopting the method and the system of the invention, a water plant is moved to the underground, thus saving investment, occupying less area, having low operation cost, meeting the requirements of environmental engineering, increasing water yield and improving water quality.
Owner:陈丽琦 +1
Methods for making and using point lump-free composions and products coated with point lump-free compositions
ActiveUS20030211236A1Reduce fiber strengthCladded optical fibreFibre treatmentViscosityTemperature and pressure
A method is provided to manufacture a coated substrate, such as an optical fiber, without undesirable point lumps. The method filters a coating composition while controlling the filtering temperature, pressure drop across a filtering assembly, and filter pore size to achieve a resulting filtration factor not greater than 250,000 s<-1>. The filtration factor is a function of filtering temperature and pressure drop across the filtering assembly. Typically, the coating composition is filtered by passing the coating composition through one or more filters of the filtering assembly, having an absolute pore size rating in the range from approximately 0.05 to approximately 5 microns, at a temperature less than approximately 105° F. (40° C.), and at a pressure drop DeltaP across the filtering assembly of at most approximately 80 psig, wherein the ratio of pressure drop (mPa) to viscosity (mPa.s), which is dependent upon filtering temperature, minimizes the filtration factor to <=250,000 S<-1>.
Owner:WESTLAKE EPOXY INC
Soil stabilizer
InactiveCN104419426AReduce hydrophilicityEasy dischargeOther chemical processesBuilding constructionsSolid particleRoad surface
The invention discloses a soil stabilizer, which is used for overcoming the defects of an existing soil stabilizer that soil is loose after being immersed by rainwater, the pavement easily generates pot holes after being crushed, and the soil stabilizer is not suitable for a region with much rainwater. The soil stabilizer disclosed by the invention is prepared from water, dilute sulphuric acid, dodecylbenzene sulfonic acid, polyacrylamide, magnesium oxide, calcium phosphate, sodium silicate, sodium lignin sulfonate and polyvinylpyrrolidone. According to the soil stabilizer disclosed by the invention, the hydrophilicity of soil can be reduced; the filtration coefficient is reduced after crushing; and the formed solid particles are solidified, so that the destroy to a roadbed caused by water is reduced, the frost boiling phenomenon is effectively prevented, and the carrying capacity of the pavement is improved.
Owner:彭玺
Horizontal drainage system for vacuum preloading processing soft soil foundation
Provided is a horizontal drainage system for vacuum preloading processing soft soil foundation. The horizontal drainage system for vacuum preloading processing soft soil foundation comprises drainage filter pipes, a drainage cushion layer and anti-break layers. The drainage cushion layer is formed by mixing coarse particles made from graded broken stones and graits with the diameter ranging from 10 mm to 30 mm and fine particles made from mineral powder and medium fine sands with the diameter ranging from 0.075 mm to 0.5 mm in a weight ratio ranging from 1:1 to 1:1.5. The silt content of material of the drainage cushion layer is ranging from 5%-10%. The filtration coefficient is bigger than 1*10<-4>m<3> / s. The thickness of the drainage cushion layer is ranging from 40 cm to 100 cm. The upper portion of the drainage cushion layer is provided with the anti-break layers which are made out of polymer geosynthetics. Compared with the traditional drainage system with a sand cushion layer, the horizontal drainage system has the equivalent drainage effect. The material of the drainage cushion layer is wide and easy to obtain. The project cost and the implement risk are lowered. Compared with the vacuum preload of a non-sand cushion layer, the vacuum preload has the advantages that the loss of the vacuum degree is low, the preload concretion effect is good, and the construction technology is simple.
Owner:浙江省水利水电勘测设计院有限责任公司
Fracturing fluid filtration rate prediction method
InactiveCN103926420ASimple methodSimple calculationEarth material testingFluid speed measurementRock coreFracturing fluid
The invention discloses a fracturing fluid filtration rate prediction method. The fracturing fluid filtration rate prediction method sequentially includes the steps that (1) rock cores of specific stratums are manufactured into standard experiment rock cores needed by a high-temperature and high-pressure filtration instrument, a fracturing fluid filtration experiment is carried out at the needed temperature and pressure, the sectional areas A of the experiment rock cores and the filtration amount Q of fracturing fluid passing through the rock cores of the stratums in a certain time t are measured, and the unit area filtration rate v of the specific stratums is obtained according to v=Q / (t*A); (2) according to variable index fracturing fluid filtration rate calculation formula (please see the specification for the calculation formula) related to the specific stratums and the fracturing fluid, undetermined indexes b and filtration coefficients c are calculated, a calculation formulas of the specific stratums and the specific fracturing fluid filtration rate are obtained, and the fracturing fluid filtration rate is accordingly predicted. The fracturing fluid filtration rate prediction method is reliable in principle and easy to operate, the rate of filtration of the fracturing fluid to the stratums can be accurately predicted, theoretical foundations and technology supports are provided for improving the fracturing fluid efficiency and reducing the construction risks in fracturing design, and the fracturing fluid filtration rate prediction method has the good market prospect.
Owner:SOUTHWEST PETROLEUM UNIV
Data processing method, data processing device and terminal
ActiveCN104407832AReduce harmSpecific program execution arrangementsDigital output to display deviceComputer hardwareComputer science
An embodiment of the invention is applicable to the communication field and provides a data processing method, a data processing device and a terminal. The data processing method comprises the following steps of obtaining page data which is corresponding to an application program; obtaining a color filtration coefficient of the application program, wherein the color filtration coefficient comprises a blue component filtration coefficient; filtering the obtained page data according to the color filtration coefficient of the application program; outputting the page data after filtration. The data processing method can reduce damage to human eyes from the blue components of the web data.
Owner:GUANGDONG OPPO MOBILE TELECOMM CORP LTD
dynamic filtration measuring device for liquid CO2/N2 two-phase system dry-method fracturing fluid under high pressure conditions and measuring method of device
InactiveCN108562519AAccurately measure filtration performanceReal-time monitoring of phase state changesSurface/boundary effectTemperature controlMeasurement device
The invention discloses a dynamic filtration measuring device for liquid CO2 / N2 two-phase system dry-method fracturing fluid under high pressure conditions and a measuring method of the device, and belongs to the technical field of performance testing of liquid CO2 / N2 two-phase system dry-method fracturing fluid. The measuring device comprises a gas pressurization and circulation system, a dynamicfiltration core clamping system, a filtrate collection and metering system and a temperature control system; by means of the gas pressurization and circulation system, liquid CO2 and N2 are mixed andcircularly pass through the dynamic filtration core clamping system to simulate the process that the filtration of the liquid CO2 / N2 two-phase system dry-method fracturing fluid enters the stratum, and the filtrate collection and metering system meters experimental data; the temperature control system achieves temperature control over the measuring device. By means of the dynamic filtration measuring device, flowing of the liquid CO2 / N2 two-phase system dry-method fracturing fluid in cracks under the high pressure conditions and the filtration process of the fracturing fluid through a crack wall are accurately simulated, the filtration of the fracturing fluid is measured, the filtration coefficient is calculated, and basic parameters are provided for liquid CO2 dry-method fracturing design.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)
A Prediction Method of Fracturing Fluid Loss Rate
InactiveCN103926420BSimple methodSimple calculationEarth material testingFluid speed measurementLoss rateRock core
The invention discloses a fracturing fluid filtration rate prediction method. The fracturing fluid filtration rate prediction method sequentially includes the steps that (1) rock cores of specific stratums are manufactured into standard experiment rock cores needed by a high-temperature and high-pressure filtration instrument, a fracturing fluid filtration experiment is carried out at the needed temperature and pressure, the sectional areas A of the experiment rock cores and the filtration amount Q of fracturing fluid passing through the rock cores of the stratums in a certain time t are measured, and the unit area filtration rate v of the specific stratums is obtained according to v=Q / (t*A); (2) according to variable index fracturing fluid filtration rate calculation formula (please see the specification for the calculation formula) related to the specific stratums and the fracturing fluid, undetermined indexes b and filtration coefficients c are calculated, a calculation formulas of the specific stratums and the specific fracturing fluid filtration rate are obtained, and the fracturing fluid filtration rate is accordingly predicted. The fracturing fluid filtration rate prediction method is reliable in principle and easy to operate, the rate of filtration of the fracturing fluid to the stratums can be accurately predicted, theoretical foundations and technology supports are provided for improving the fracturing fluid efficiency and reducing the construction risks in fracturing design, and the fracturing fluid filtration rate prediction method has the good market prospect.
Owner:SOUTHWEST PETROLEUM UNIV
A method for eliminating spike noise in ground NMR data based on collaborative filtering
ActiveCN109100813BImprove accuracyImprove data qualityDetection using electron/nuclear magnetic resonanceAcoustic wave reradiationHadamard transformUltrasound attenuation
The invention relates to a method of removing spike noise from ground nuclear magnetic resonance data based on synergic filtration. The method comprises the steps of judging whether all measurement data under a pulse moment has the spike noise through a 3 sigma rule, dividing the measurement data into a group containing the spike noise and a group containing no spike noise, performing discrete cosine transform and Hadamard transform to form two transform domain coefficients, calculating a filtration coefficient through the transform coefficient of the data without the spike noise, performing filtration on the coefficient of the data containing the spike noise, and at last, performing Hadamard and discrete cosine inverse transform on the filtered coefficient of the data containing the spikenoise to remove the spike noise. According to the method, the data containing a spike noise time period is not deleted or replaced, and a relaxation attenuation characteristic of a ground nuclear magnetic resonance signal is not changed. Through testing, the method has high accuracy of removing the spike noise from the ground nuclear magnetic resonance data and improves extraction precision of asignal characteristic parameter.
Owner:JILIN UNIV
Filtrate reducer and preparation method thereof
ActiveCN103409127AReduce instantaneous filtrationReduce filter loss coefficientDrilling compositionEmulsionPetroleum product
The invention provides a filtrate reducer. The filtrate reducer comprises the following raw materials in parts by weight: 700 to 800 parts of a light petroleum product, 10 to 75 parts of a hydrocarbon dispersing agent A, 10 to 75 parts of a hydrocarbon dispersing agent B and 10 to 50 parts of cedar oil. The filtrate reducer provided by the invention can react with water-based fracturing liquid to form an emulsion to achieve a de-filtration effect, has an excellent dispersing effect, has excellent compatibility with vegetable glue water-based fracturing liquid, can effectively reduce instant filtration and filtration coefficient of the fracturing liquid and reduce blockage of emulsion, and does not have any influence on temperature resistance, shear resistance and viscosity performance of the fracturing liquid at high temperature.
Owner:PETROCHINA CO LTD
Drain board filter cloth manufacturing technique and prepared filter cloth
InactiveCN106757894AIncrease the permeability coefficientImprove work efficiencyTextile treatment machine arrangementsTextile treatment by spraying/projectingProduction lineEngineering
The invention provides a drain board filter cloth manufacturing technique and a prepared filter cloth, and relates to the technical field of drain board filter cloth production. The method is mianly used for improving filtration coefficients of the drain board filter cloth to enhance the water absorption capability of the drain board filter cloth. According to the drain board filter cloth manufacturing technique, a liquid chemical spraying process is added between a spun-laid process and a hot pressing roller process of a traditional filter cloth production line. By means of a spraying device, a liquid chemical which is formed by mixing a hydrophilic agent with water in the proportion of 8:100 is evenly sprayed on the surface of the filter cloth in a mist mode. The drain board filter cloth manufacturing technique increases the filtration coefficients of the filter cloth on the basis that immovable original parameters and original production processes of the filter cloth are not changed, resource are saved, and the overall working performance of a drain board is improved.
Owner:杨生勇
Method for air-water backwashing and surface cleaning natural filter bed filter material and a cleaning control system thereof
InactiveCN101279157BIncrease water productionLarge amount of waterLoose filtering material filtersGravity filtersSurface cleaningWater production
A washing method of an air-water backwashing surface of filter materials of a natural filtering bed and a washing control system thereof are provided by the present invention. By the use of air lift generated by compressed air, piping generated by water power and separation generated by the mixture of the air and the water, the compact filter materials and a silt layer covered on the natural filtering bed are dispersed to cause the recombination of the filter materials. Meanwhile, with the running of river water, the silt with light weight and sediment are discharged out of the filtering bed, thus increasing the filtration coefficient of a permeable layer and the vertical infiltration velocity of surface water to underground. The control system comprises a seepage well of the natural filtering bed, an air distribution system which generates the air lift and a water distribution system and a control system which generate the piping. By adopting the method and the system of the invention, a water plant is moved to the underground, thus saving investment, occupying less area, having low operation cost, meeting the requirements of environmental engineering, increasing water yield and improving water quality.
Owner:陈丽琦 +1
A method for on-site judgment of T-shaped fracture formation risk and corresponding fracturing technology
ActiveCN111636855BIncrease production capacityImprove seam making efficiencySurveyFluid removalFracturing fluidHydraulic fracturing
A method for on-site discrimination of T-shaped fracture formation risks and a corresponding fracturing process belong to the technical field of hydraulic fracturing in oil and gas fields. A method for on-site discrimination of T-shaped fracture formation risks, comprising the following steps: (1) the first perforation adopts a single-stage perforation method, and the perforation length is 1-3m; (2) small-scale fracturing tests and pressure drop analysis are carried out, The pressure drop test time is more than 1.5-2.0 times of the small-scale fracturing construction time; (3) Calculate the pump stop pressure gradient and fracturing fluid loss coefficient; (4) If the pump stop pressure gradient is greater than 0.023MPa / m, and the fracturing If the fluid loss coefficient is 1-2 orders of magnitude higher than the matrix fluid loss coefficient, the risk of T-shaped seam formation is high. For mines with a high risk of T-shaped fractures, it is important to improve the productivity of shale gas wells by optimizing perforation methods and fracturing parameters to improve fracture creation efficiency, form vertical fractures as much as possible, and avoid forming a large number of horizontal fractures and T-shaped fractures. significance.
Owner:华美孚泰油气增产技术服务有限责任公司
Evaluation method and equipment for fluid production contribution rate of single-stage fractures based on pressure drop data
ActiveCN110805436BAccurate evaluation of production fluid contribution rateLow costSurveyDesign optimisation/simulationBottom hole pressureReservoir fluid
The embodiment of the present invention provides a method and equipment for evaluating the fluid production contribution rate of a single-stage fracture based on pressure drop data. The method includes: determining the reservoir closure pressure of the target well; The expression of reservoir fluid loss coefficient is determined by formula; the maximum fracture height is determined by solving the fracture height equation; the maximum fracture width is determined according to the maximum fracture height and reservoir closure pressure, and the average fracture width is determined according to the maximum fracture width; Reservoir fluid loss coefficient expression, maximum fracture height and maximum fracture width, determine the fracture length, and determine the half-fracture length; according to the measured fracture porosity, formation thickness, fracture liquid phase pressure, liquid phase viscosity, liquid phase volume coefficient, Bottomhole pressure, as well as the average fracture width and half-fracture length, determine the fluid production of the target fracture; determine the contribution rate of the target fracture according to the fluid production of the target fracture and the total fluid production at the bottom of the hole, and can accurately evaluate a single section The fluid production contribution rate of fractures is low, and the cost is low.
Owner:CHINA UNIV OF PETROLEUM (BEIJING)
A Calculation Method of Dynamic Comprehensive Fluid Loss Coefficient of Acid Fracture in Fractured Reservoir
The invention discloses a calculation method for dynamic comprehensive filtration coefficient of fracturing acidizing in fractured reservoir. The calculation method for dynamic comprehensive filtration coefficient of fracturing acidizing in fractured reservoir comprises the following steps that: (1) calculating a matrix filtration coefficient Cmt of the considering acid wormhole; (2) calculating the natural fracture filtration coefficient (Cft0) (i) i ( / i) in initial state and the comprehensive filtration coefficient Ct0 of the fracturing acidizing in initial state; (3) calculating the effective operating distance (Lefn) (i) i ( / i) of the acid liquor in the i natural fracture of a Tn time step; (4) calculating the i natural fracture width (wn) (i) i ( / i) of the Tn time step; (5) calculating the filtration coefficient (Cftn) (i) i ( / i) of the i natural fracture of the Tn time step; (6) calculating the comprehensive filtration coefficient Ctn of the fracturing acidizing of the Tn time step. The calculation method for dynamic comprehensive filtration coefficient of fracturing acidizing in fractured reservoir considers the natural fracture width variation caused by the acidliquor corrosion on the wall surface of the natural fracture, the principle is reliable, the calculation is simple, the natural fracture with random and complicated distribution can be processed, thefiltration speed of the acid liquor in the fracturing acidizing process can be accurately and quickly calculated, thereby providing an effective guidance for the design of the fracturing acidizing scheme.
Owner:SOUTHWEST PETROLEUM UNIV
Method for Measuring Filtration Coefficient of Supercritical Carbon Dioxide Fracturing Fluid
InactiveCN104568699BTrue Leakage LawStudy on the Change Law of Fluid LossSurface/boundary effectPermeability/surface area analysisFracturing fluidHigh pressure
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)
Single-section crack liquid production contribution rate evaluation method and device based on pressure drop data
ActiveCN110805436AAccurate evaluation of production fluid contribution rateLow costSurveyDesign optimisation/simulationBottom hole pressureEngineering
The embodiment of the invention provides a single-section crack liquid production contribution rate evaluation method and device based on pressure drop data. The method comprises the steps that the reservoir closing pressure of a target well is determined; a reservoir filtration coefficient expression is determined according to the expression of the crack volume reduction amount and the total filtration loss amount; the maximum crack height is determined by solving a crack height equation; the maximum crack width is determined according to the maximum crack height and the reservoir closing pressure, and the average crack width is determined according to the maximum crack width; the crack length is determined according to the reservoir filtration coefficient expression, the maximum crack height and the maximum crack width, and the half crack length is determined; the liquid production amount of a target crack is determined according to the measured crack porosity, the measured formationthickness, the measured crack liquid phase pressure, the measured crack liquid phase viscosity, the measured liquid phase volume coefficient, the measured well bottom pressure, the obtained average crack width and the obtained half crack length; and the contribution rate of the target crack is determined according to the liquid production amount of the target crack and the total liquid productionamount of the well bottom. The liquid production contribution rate of the single-section crack can be accurately evaluated, and the cost is low.
Owner:CHINA UNIV OF PETROLEUM (BEIJING)
Acid liquor effective action distance calculation method considering wormhole filtration
ActiveCN114021312AImprove efficiencyMethod scienceClimate change adaptationFluid removalMechanical engineeringViscosity
Owner:CHINA PETROLEUM & CHEM CORP +1
Ultrasonic wave based soft foundation treatment solidification speed increasing method
InactiveCN108118675AImprove permeabilitySpeed up the consolidationSoil preservationUltrasound attenuationUltrasonic cavitation
The invention discloses an ultrasonic wave based soft foundation treatment solidification speed increasing method. The method includes steps: determining transmitting frequency and power of a probe ineach ultrasonic treatment device according to ultrasonic propagation attenuation characteristics and a drain hole pitch; uniformly mounting multiple ultrasonic treatment devices on the outer wall ofa drain pipe along the axial direction of the drain pipe; starting the ultrasonic treatment devices to perform treatment for certain time, so that the soft soil filtration coefficient is increased byan ultrasonic cavitation effect, and soft foundation treatment solidification speed is further increased. The method has advantages that soft soil settlement can be accelerated, a soft soil treatmentperiod is shortened, and the method has positive significance to highway soft foundation treatment and also has a certain guidance function for marine soft foundation treatment in reclamation projects.
Owner:TIANJIN UNIV
Socialized filtering method on basis of preference model
InactiveCN102521420BImprove accuracyReduce complexitySpecial data processing applicationsThe InternetData mining
Owner:XIDIAN UNIV
Method for testing filtration loss of rough natural fracture fracturing fluid
The invention discloses a method for testing filtration loss of rough natural fracture fracturing fluid. The method comprises the following steps: manually drilling an outcrop of a construction site of a target oil field to obtain a cylindrical rock core; treating the cylindrical rock core, and then conducting artificial fracture forming on the cylindrical rock core in an artificial fracture cutting mode; scanning cracks of the cylindrical rock core to obtain a crack profile map of the cylindrical rock core; calculating the surface roughness of each crack surface; conducting a displacement experiment on the cylindrical rock core subjected to fracture forming; according to the filtration loss time and the accumulated filtration loss of the filtration loss, making a filtration loss and time square root relational graph; according to the filtration loss and time square root relational graph, obtaining a linear relational expression of the filtration loss and time square root and the slope and intercept of a straight line; and according to the cross sectional area of the rock core, the slope of the straight line and the intercept, obtaining the filtration coefficient, the filtration velocity and the initial filtration amount through calculation. According to the method, the filtration law of the fracturing fluid in the natural crack can be accurately obtained, and a basis is provided for hydraulic fracturing during subsequent site construction.
Owner:CHINA PETROLEUM & CHEM CORP +1
Data processing method, data processing device and terminal
ActiveCN104407832BReduce harmSpecific program execution arrangementsDigital output to display deviceComputer graphics (images)Computer terminal
Owner:GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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