Product
Feature
Quick Research
Generate reliable direction feasibility study reports for your R&D in just a few steps.
Technical Q&A
Discover and master advanced knowledge NOW. Basics, ideas, possibilities, all at once.
Find Solutions
As an expert in R&D theories, this can generate solutions to your technical problems instantly.
Evaluate Feasibility
Analyze your overall solution with one click, know your potential R&D risks in advance.
Monitor Landscape
Get weekly tech updates, stay abreast of the latest tech innovations and key insights.
Patents
Literature
Hiro is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
58 results about "Pore scale" patented technology
Efficacy Topic
Property
Owner
Technical Advancement
Application Domain
Technology Topic
Technology Field Word
Patent Country/Region
Patent Type
Patent Status
Application Year
Inventor
Low-field nuclear magnetic resonance multi-probe quantitative test system and method special for hydrate
PendingCN107807143ARealize the integration of testing and analysisRealize integrationAnalysis using nuclear magnetic resonanceWater resource assessmentPore fluidLow field nuclear magnetic resonance
The invention discloses a low-field nuclear magnetic resonance multi-probe quantitative test system and a low-field nuclear magnetic resonance multi-probe quantitative test method special for hydrate.The test system comprises a low-field nuclear magnetic resonance analyzer, a confining pressure-adding low-temperature high-pressure probe, a confining pressure-free low-temperature high-pressure probe, a confining pressure-free normal-temperature normal-pressure probe, a temperature confining pressure control module, a pore fluid supply module and an industrial personal computer. Through combined use of the confining pressure-adding low-temperature high-pressure probe, the confining pressure-free low-temperature high-pressure probe and the confining pressure-free normal-temperature normal-pressure probe and the improved design of the structure as well as by adoption of a multi-probe combined use mode, research on integration of hydrate-containing deposit low-field nuclear magnetic resonance measuring signal quantitative calibration and hydrate-containing deposit pore scale behavior measuring analysis is realized, research on the hydrate-containing deposit pore scale behavior featureis facilitated, and foundation is laid for discussion on hydrate-containing deposit basic physical property parameter change micromechanism.
Owner:QINGDAO INST OF MARINE GEOLOGY
Method for cost effective sampling and characterization of heterogeneous unconventional hydrocarbon regions
ActiveUS20120316789A1Electric/magnetic detection for well-loggingComputation using non-denominational number representationScale heterogeneityComputer science
A methodology improves sampling and characterization of heterogeneous, unconventional hydrocarbon-bearing regions. The methodology is designed to integrate consistently across measurements and scales. Additionally, the methodology involves characterizing various scales, such as regional-scale heterogeneity, wellbore-scale heterogeneity, core-scale heterogeneity, sample-scale, and pore-scale heterogeneity. The results are integrated across the multiple scales based on results obtained from the characterization of the scales. The methodology further comprises determining data propagation across the multiple scales in a hydrocarbon-bearing region.
Owner:SCHLUMBERGER TECH CORP
Method for preparation of bone hydroxyapatite-imitating bone repair material
The invention discloses a method for preparation of a bone hydroxyapatite-imitating bone repair material, nano hydroxyapatite ceramic powder and NH4HCO3 powder are mixed proportionally, after mixing, the powder is loaded into a gradient mold for mechanical pressing into a block pressed blank, the block pressed blank is put into a discharge plasma sintering furnace, heated to 950 DEG C and 1050 DEG C in the heating rate of 100 DEG / min, and then kept warm for 10-20min, and after demoulding, a nano scale bone gradient-imitating porous hydroxyapatite bone repair material is obtained. The nano scale bone gradient-imitating porous hydroxyapatite bone repair material is prepared by the method comprises outer and inner two layers, the porosity is 34% to 80%, and the pore scale is controllable in the range of 100-500mum, and the nano scale bone gradient-imitating porous hydroxyapatite bone repair material has the advantages of fine grain size, composition purity, no residual pore former, controllable mechanical properties and degradation rate and the like, and can be used as a good artificial bone tissue repair material.
Owner:FIRST PEOPLES HOSPITAL OF YUNNAN PROVINCE
Three-dimensional pore scale model reconstruction method based on rock micro CT image
InactiveCN108876923AFast convergencePerfect reproduction of real topological featuresImage enhancementImage analysisArray data structureModel reconstruction
The application discloses a three-dimensional pore scale structured grid model reconstruction method based on a rock micro CT image. According to the method, by digital image denoising and binarization processing, partitioning and extraction of pores and skeletons in the rock micro CT image are completed, and storage of image data is implemented in a form of a three-dimensional array matrix; and on the basis of a corresponding relationship of model grid unit bodies and image pixels in the aspect of space positions, independently developed codes are utilized to complete search and space position calibration of the pixels of pore phases and skeleton phases, a structured network mode of the skeletons and the pores is constructed by adopting the grid unit bodies with the same sizes with the pixels, and a final model obtained by surface grid growth and geometric remodeling can be directly used for numerical calculation. The three-dimensional pore scale structured grid model reconstruction method disclosed by the invention improves the defects of poor grid quality, distorted topological structure and the like of a conventional reconstructed model, can meet numerical simulation requirements of problems of seepage, deformation, heat transfer and the like, and has the important significance for promoting researches in the related fields of energy mining and geotechnical engineering.
Owner:SOUTHWEST PETROLEUM UNIV
Well Treatment with Digital Core Analysis
ActiveUS20160025895A1Electric/magnetic detection for well-loggingComputing modelsBreakthrough curvePore scale
Methods of well treatment include modeling approaches that account for the effect of pore structure during well stimulation treatments. In one aspect, methods may include preparing a computer model of a porous medium; simulating an injection of a fluid into the computer model of the porous medium; measuring a pore-scale heterogeneity of the computer model of the porous medium, and designing a stimulating fluid treatment for the porous medium. Other aspects may include the development of a wellbore stimulation methodology that allows stimulation fluid breakthrough curves of differing formation samples to be plotted as a single curve that accounts for the varied pore structure of the respective samples.
Owner:SCHLUMBERGER TECH CORP
Preparation method for scale-adjustable nano porous metal material
The invention discloses a preparation method for a scale-adjustable nano porous metal material and belongs to the field of porous material preparation. A pore-forming material is added to superfine metal powder, compression molding of the superfine metal powder is conducted, and then the superfine metal powder is sintered in a vacuum sintering furnace to obtain the porous material. The interior of the porous material contains multiple pore scales of nano-micron-milli, and the dual-adjustment of the inside pore scale of the porous material and the surface roughness scale of a metallic matrix can be achieved by controlling the parameters such as the grain size of the metal powder, the content and grain size of the pore-forming material, the sintering temperature and the holding time and the follow-up treatment process, so that the porous material has super hydrophilicity, and the efficiency of boiling heat transferring is significantly improved. The preparation method for the scale-adjustable nano porous metal material is low in cost, easy to operate and reliable in technology; the product can be used for a wick of a heat pipe, the evaporating surface of an evaporator and other boiling phase-changing heat transferring devices, so that the preparation method for the scale-adjustable nano porous metal material has good application prospects.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING)
And extracting a quantitative characterization rock core heterogeneity method based on the pore information of the rock core CT image
ActiveCN109697752AEvaluate heterogeneityFacilitate targeted researchImage enhancementDetails involving processing stepsInverse correlationComputed tomography
The invention discloses a method for extracting and quantitatively characterizing core heterogeneity based on core CT image pore information, comprising the following steps: carrying out CT scanning experiment on a carbonate rock core to obtain a two-dimensional gray scale slice; carrying out binarization segmentation, filtering, denoising, optimization processing, superposition reconstruction forming and core peer-to-peer digital core on the obtained two-dimensional gray scale slice; processing the data of the digital rock core; establishing a contribution relation equation of the rock core dissolved pore parameters to the rock core heterogeneity by utilizing the calculation parameters according to the relation that the heterogeneity of the rock core and the ratio of the dissolved pore volume to the total volume of the rock core are in positive correlation and are in inverse correlation with the number of the dissolved pores; and establishing a standard variance of rock core dissolvedpore scale distribution according to the rock core dissolved pore scale and the heterogeneity of the rock core, and quantitatively obtaining the heterogeneity of the rock core. The heterogeneity of the rock is evaluated based on quantitative calculation of the pore attribute of the rock, and the result is accurate and reliable; and guidance is provided for oil and gas reservoir reserve calculation and development schemes.
Owner:BC P INC CHINA NAT PETROLEUM CORP +1
Method of optimizing the injection of a reactive fluid into a porous medium
InactiveUS20110082678A1Analogue computers for chemical processesCarbon-dioxide storageFluid injectionEnvironmental geology
The invention is a method of optimizing the injection of a fluid into a porous medium, using modelling the migration of the fluid within the medium having application for oil reservoir development. A reservoir model is constructed. In each cell of this the model, a PNM model representative of the pore network in the cell is constructed. The concentration of the fluid is then determined in each cell by solving the cell-scale reactive transport equation. Fluid concentration modifications at the level of the fluid / rock interface, at the pore scale, are therefore taken into account by means of the PNM models. Corrective coefficients for the reactive transport equation and a law between the permeability of the porous medium and the porosity of the porous medium are thus calculated. Finally, fluid injection is optimized as a function of the concentrations in each cell.
Owner:INST FR DU PETROLE
Petrophysical modeling method and system
The present invention relates to a petrophysical modeling method and a system thereof. The method comprises the steps of: a. obtaining the rock mineral composition and content according to a composition and content equivalent skeleton modulus, and obtaining related information of a plurality of pores in the rock; b. modifying a KT rock physical model according to the relevant information of the multiple pores to obtain a modified model; c. calculating the dry rock skeleton modulus based on the modified model and the equivalent skeleton modulus; and d. performing fluid replacement to obtain saturated fluid porous media P-wave velocities, shear wave velocities and densities, in order to complete modeling. The modified KT model taking the size of pores into account describes the influence of the pore transverse and longitudinal ratio and the pore scale on the seismic wave velocity. Under the same porosity conditions, the P-wave velocity and the shear wave velocity increase along with the increase of the pore scale, and decrease along with the decrease of the transverse and longitudinal ratio.
Owner:CHINA PETROLEUM & CHEM CORP +1
Method for estimating petrophysical properties of a hydrocarbon reservoir
Estimating petrophysical properties of a hydrocarbon reservoir traversed by at least one wellbore comprises obtaining at least one core sample from the wellbore and obtaining a three-dimensional (3D) porous solid image of the core sample. A 3D pore scale model is generated from the 3D porous solid image. A distribution of reservoir fluids in pores of the reservoir is simulated by a microhydrodynamic simulation using the 3D pore scale models of the core samples and at least one petrophysical property of the reservoir by a microscale modeling using the simulated distribution of the reservoir fluids is simulated by fitting the at least one simulated petrophysical property to well logging data at a depth corresponding to a depth of taking the core sample using free parameters. Governing parameters of the 3D pore scale models are extrapolated along a logged part of the wellbore and the at least one other petrophysical property is estimated by simulation.
Owner:SCHLUMBERGER TECH CORP
Multiscale digital rock modeling for reservoir simulation
Methods for upscaling digital rock modeling data are described. Core-plug samples for pore-scale modeling are chosen using whole-core mini-permeability grids and conventional CT scans. Pore models or pore-network models are used for flow modeling. Borehole-scale models use MPS (Multi-Point Statistics) to combine mini-permeability grids and conventional CTscans of whole core with electrical borehole images to create 3D numerical pseudocores for each RRT (Reservoir Rock Type). Effective SCAL properties computed from various MPS borehole-scale realizations or models are used to populate interwell-scale models for each RRT. Effective properties computed from flow simulations for interwell volumes are used to populate full-field scale models. At the full-field scale, outcrop analogs, sequence stratigraphy, forward stratigraphic models, diagenetic models, and basin-scale models are combined using MPS to improve flow simulations. At every stage, REVs (representative element volumes) are computed to be certain rock heterogeneities have been captured.
Owner:SCHLUMBERGER TECH CORP
Method for measuring capillary pressure of CO2-saline-core system based on X-ray computed tomography (CT) technology
ActiveCN106383133AEasy to operateReduce measurement errorImage enhancementImage analysisCt technologyCapillary pressure
The invention belongs to the technical field of scientific research of oil and provides a method for measuring capillary pressure of a CO2-saline-core system based on an X-ray CT technology. The measuring method disclosed by the invention comprises the following four steps: measuring CO2-saline interfacial tension, performing core displacement and CT scanning, performing CT image processing and measuring the capillary pressure. By utilizing the X-ray CT technology, the method disclosed by the invention has the characteristics of relatively high resolution and capacity of performing nondestructive testing on samples, is capable of accurately, conveniently and really measuring the capillary pressure of the CO2-saline-core system in different flow conditions, and can measure local core capillary pressure and overall core capillary pressure, so that the measurement scale reaches the pore scale. Moreover, the measuring method can be popularized to measuring the capillary pressure of any gas-liquid porous medium system or liquid-liquid porous medium system.
Owner:DALIAN UNIV OF TECH
Rock-soil body discrete element fluid-solid coupling numerical simulation method based on pore density flow
ActiveCN110263362AUniform physical propertiesSmall amount of calculationDesign optimisation/simulationSpecial data processing applicationsMacroscopic scalePore fluid
The invention discloses a rock-soil body discrete element fluid-solid coupling numerical simulation method based on pore density flow. The method comprises the steps of generating a solid particle random accumulation model, subdividing and identifying a pore network, establishing a pore seepage equation, acting on solids by pore fluid and adjacent solid particles, acting on the pore fluid by solid displacement, and updating pore seepage parameters; repeating the steps until the solid particles are balanced and the seepage of the pore fluid is stable. According to the method, the calculated amount is greatly reduced, the pore fluid state equation is established, the temperature field and the seepage field are naturally coupled through density, the microscopic seepage equation is established by analogy of the macroscopic Darcy law to achieve pore seepage calculation, and the complex macroscopic phenomenon can be efficiently simulated based on the pore scale energy.
Owner:NANJING UNIVERSTIY SUZHOU HIGH TECH INST
Numerical simulation method for fluid-solid coupling in hydraulic fracturing process of single-fracture rock
ActiveCN112818611ASmall amount of calculationComprehensive simulation analysisEarth material testingDesign optimisation/simulationMacroscopic scaleClassical mechanics
The invention provides a numerical simulation method for a hydraulic fracturing process of a single-fracture rock based on a pore density flow method, which comprises the following steps of: firstly, establishing a rock-soil body discrete element particle accumulation body, namely, establishing a basic initial stratum accumulation model by simulating a gravity deposition process of a real world; obtaining a material conforming to the property of a real physical world material through material training; dispersing a rock-soil body into mutually contacted solid particles, subdividing and identifying pores according to a particle accumulation skeleton, and establishing a hydraulic fracturing numerical model; and carrying out time step iterative calculation until the rock-soil body model is balanced, and outputting a simulation result. According to the method, fluid density and pressure changes caused by different prefabricated fracture angles and prefabricated fracture angle changes are considered, a very complex and high-cost hydraulic fracturing experiment can be efficiently simulated based on the pore size, complex macroscopic phenomena can be explained, and hydraulic fracturing effects under different prefabricated fractures can also be simulated.
Owner:NANJING UNIV
Thermal-Fluid-Solid Multi-Field Coupling Simulation Method Based on Micro-Scale Reconstruction Model
InactiveCN109063383AEasy to operateThe implementation process of coupling solution is simpleDesign optimisation/simulationSpecial data processing applicationsMathematical modelMulti field
The present application discloses a Thermal-Fluid-Solid Multi-Field Coupling Simulation Method Based on a Micro-Scale Reconstruction Model. The method comprises the steps that: based on the reconstructed pore-scale structured mesh model of rock, by using rock micro-CT images, the mathematical model of solid-solid-three-field coupling is established, and the prediction of rock pore structure evolution and flow characteristics by stress and temperature change is realized through numerical simulation. Different from the traditional macro-scale heat-solid-solid coupling theory, this method is based on the reconstruction model of pore scale, and reveals the interaction mechanism of solid multi-field coupling. It is not only helpful to predict the effect of stress and temperature parameters on the development effect, but also to promote the research of multi-field coupling in geotechnical engineering, such as underground nuclear waste disposal, CO2 sequestration and geothermal development, which can better guide the engineering practice.
Owner:SOUTHWEST PETROLEUM UNIV
Microcosmic oil deposit model and manufacturing method and using method thereof
InactiveCN108150162AContribute to theoretical researchShorten research experiment timeBorehole/well accessoriesNon wettingPore diameter
The invention discloses a microcosmic oil deposit model and a manufacturing method and using method thereof. The microcosmic oil deposit model comprises a model skeleton, a pore throat channel is formed in the model skeleton, a wetting phase channel is used for providing a flowing channel for a wetting phase, a non-wetting phase channel is used for providing a flowing channel for a non-wetting phase, wherein the wetting phase channel and the non-wetting phase channel communicate with the pore throat channel, and are located on the two sides of the pore throat channel correspondingly, and the pore diameter of the wetting phase channel and the pore diameter of the non-wetting phase channel are larger than the minimum pore diameter of the pore throat channel. According to the microcosmic oildeposit model, an experimental model is provided for study of a true oil deposit imbibition mechanism by arranging the wetting phase channel and the non-wetting phase channel with the pore diameters being larger than that of the pore throat channel, a means for visually representing the mesoporosity dimension oil and water distribution and a migration mode in the imbibition oil mining and exploring process is provided as well, the study experimental time can be sharply shortened, and the microcosmic oil deposit model and the manufacturing method and the using method thereof are conductive to the theoretical study of the oil deposit imbibition mechanism.
Owner:CHINA UNIV OF PETROLEUM (BEIJING)
Method for cost effective sampling and characterization of heterogeneous unconventional hydrocarbon regions
ActiveUS8571799B2Electric/magnetic detection for well-loggingComputation using non-denominational number representationScale heterogeneityComputer science
A methodology improves sampling and characterization of heterogeneous, unconventional hydrocarbon-bearing regions. The methodology is designed to integrate consistently across measurements and scales. Additionally, the methodology involves characterizing various scales, such as regional-scale heterogeneity, wellbore-scale heterogeneity, core-scale heterogeneity, sample-scale, and pore-scale heterogeneity. The results are integrated across the multiple scales based on results obtained from the characterization of the scales. The methodology further comprises determining data propagation across the multiple scales in a hydrocarbon-bearing region.
Owner:SCHLUMBERGER TECH CORP
Device and method for measuring Sherwood number between gas and liquid in porous medium by applying CT (Computed Tomography)
ActiveCN106501286AEasy to measureNoninvasive assayMaterial analysis by transmitting radiationHigh pressureGas concentration
The invention relates to a device and a method for measuring a Sherwood number between a gas and a liquid in a porous medium by applying CT (Computed Tomography). The device comprises a CT scanning system and a gas-liquid mass transfer system. The method comprises the following steps: first, controlling the temperature and the pressure of a reaction container to be constant; acquiring CT images that the volume of foam in the porous medium changes with time at different liquid injection flow rates and in different liquid injection directions by utilizing a CT scanning imaging technology; obtaining the gas concentration value of the liquid and the value of a two-phase interface specific surface area after the CT images are processed, so that the Sherwood number of mass transfer between the gas and the liquid in the porous medium is calculated. By controlling an experimental device, different liquid injection directions can be set during an experiment process, so that convenience is brought to the analysis of the influence on a gas-liquid interface shape and the Sherwood number numerical value caused by gravity. By applying the method and a measuring device thereof, the Sherwood number between the gas and the liquid under a pore scale can be obtained, so that the cognition of mass transfer rules of the two phase materials of the gas and the liquid is enhanced; basic physical property data are provided for the analysis of multi-phase multi-component migration rules in a stratum environment.
Owner:DALIAN UNIV OF TECH
Direct tracking method for pore scale motion of polymer gel particles
ActiveCN108563919AEnhanced overall recoveryDirect track implementationChemical processes analysis/designSpecial data processing applicationsContact forcePolymer gel
The invention provides a direct tracking method for pore scale motion of polymer gel particles. The direct tracking method for the pore scale motion of the polymer gel particles comprises the steps of1, solving a fluid field; 2, calculating stresses of sub-particles; 3, calculating motion of the sub-particles; 4, correcting fluid volume of a particle coverage region; and 5, returning to the step1 for continuing to solve the next time step, until a preset time stop condition is met. The direct tracking method for the pore scale motion of the polymer gel particles successfully realizes the influence of contact forces between the particles, contact forces between the particles and a wall and action forces of the particles and a fluid on particle motion and deformation, and successfully realizes direct tracking of a dynamic process of motion of a polymer gel particle oil flooding system in pores.
Owner:CHINA PETROLEUM & CHEM CORP +1
A method and a system for performing chemical treatment of a near wellbore area
Performing of a chemical treatment of a near wellbore area may include extraction of a core sample representing a portion of a near wellbore area, obtaining a three-dimensional (3D) pore scale model of a core sample, determination of composition of a core sample, generation scenarios of chemical treatment that each include chemical agent, determination of rates of reaction between mineral comprising core sample and treatment fluids, determination of qualitative and quantitative composition of reaction system in equilibrium, simulation of chemical treatment process using 3D model of a core sample and data on chemical reactions between minerals and treatment fluids, analysis of the chemical treatment influence on transport properties of a core sample, selection of optimal treatment scenario. Further, an operation is performed using the selected treatment scenario.
Owner:SCHLUMBERGER TECH CORP
Three-dimensional deformed face limitation-based face pore matching method
InactiveCN107729904AImprove accuracyExact matchCharacter and pattern recognitionScale-invariant feature transformTransformation algorithm
The invention discloses a three-dimensional deformed face limitation-based face pore matching method. The method comprises the following steps that: two face images of the same person under differentangles are inputted, and each face image is preprocessed; a pore level scale invariant feature transform transformation algorithm is adopted to extract the features of the pore scales of the obtainedface images, so that the skin pore features of a plurality of pore feature points in the face images can be determined; five-sense organ positioning and three-dimensional deformed face fitting are performed on the obtained face images, three-dimensional deformed faces are embedded into the two face images through fitting; three-dimensional deformed face limitation is performed on the fitted face images; the key points of the extracted features of the pore scales are matched with the key points of the pore scales of the limited three-dimensional deformed faces; and a final matching result is obtained. With the method of the invention adopted, other screening steps are not required, matching is very precise, the accuracy of the matching can be improved, and the establishment of an accurate face pore database can be benefitted.
Owner:GUANGDONG UNIV OF TECH
Unconventional reservoir multi-scale and multi-component digital rock core construction method
ActiveCN112348880ASolve the problem that the template status is zeroSolve the problem of hard coreImage enhancementImage analysisRock coreWell logging
Owner:CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
Health-care massaging perfumed soap
ActiveCN101705164BPromote degradationPromote circulationSoap detergents with organic compounding agentsDetergent materialsHuman bodySide effect
The invention discloses a health-care massaging perfumed soap. The perfumed soap comprises the following components in percentage by weight: 80-98 percent of soap base, 0.01-16 percent of hydroxy acid and 0.01-10 percent of abradant, wherein the abradant is kernel particles of natural vegetables. The natural fruit particles used in the invention have good biodegradability, are regenerative resource, convenient and easy to be obtained and completely natural, and cause no side effects on human body. With the perfumed soap, people can obtain therapeutic massage frequently and conveniently, thus effectively promoting blood circulation, relaxing muscle and relieving the tension state of mind caused by work pressure. The perfumed soap can remove the coarse cornification tissue and pore scales of body surface, cause the skin to be elastic, tender and white, ruddy and smooth and lead people to feel fairly comfortable and refreshed after use.
Owner:广东名臣日化有限公司
Method for calculating thermal conductivity of cross-scale hydrate-containing porous medium
The invention discloses a method for calculating the thermal conductivity of a cross-scale hydrate-containing porous medium. Thermal conductivity is a key parameter affecting the exploitation efficiency of natural gas hydrates. An existing thermal conductivity model is low in applicability to a hydrate-containing porous medium and large in calculation error. Therefore, aiming at the occurrence form of each phase in the hydrate-containing porous medium, the pore-scale hydrate-containing porous medium physical model is constructed. Based on a physical model, a pore scale heat transfer process in a porous medium is modeled, and a macroscopic thermal conductivity formula is deduced by using a Fourier law. Through comparison of a prediction result of the model and experimental measurement, the accuracy and applicability of the thermal conductivity model to prediction of different hydrate-containing porous media are verified.
Owner:DALIAN UNIV OF TECH
Method for roughening relative permeability of polymer flooding from pore scale to core scale
ActiveCN109632604ARapid coarsening of relative permeabilityPermeability/surface area analysisPorosityOil water
The invention discloses a method for roughening the relative permeability of a polymer flooding from a pore scale to a core scale. The method comprises the steps: dividing a heterogeneous core into multiple regions according to the pore size or porosity of a pore structure of the heterogeneous core and selecting a characterization unit of each region; according to the pore structure information ofthe characterization units, acquiring porosity and permeability of each characterization unit; forming an equivalent pore structure by using basic pore structures with different coordination numbers;simulating a polymer flooding process within the equivalent pore structure to obtain relative permeability of the equivalent pore structure; assigning the relative permeability of the effective porestructure with different regions in the heterogeneous core according to the proportion of the characterization units in the core and generating an equivalent core model; and carrying out multi-phase flow numerical simulation in the equivalent core model to solve an oil-water two-phase seepage equation and thus acquiring a relative permeability curve of the whole core. Therefore, the roughening ofthe relative permeability of the polymer flooding from a pore scale to a core scale is realized.
Owner:CHINA NAT OFFSHORE OIL CORP +2
Method and system for analyzing water-drive remaining oil of tight sandstone reservoir
ActiveCN112945829AMaterial analysis using wave/particle radiationHydrodynamic testingSoil scienceRock core
The invention discloses a method and system for analyzing water-drive remaining oil of a tight sandstone reservoir. The method comprises the steps: carrying out logical operation on a water phase of a core scanning slice in the water flooding process to obtain water-oil space distribution in different water flooding states; establishing a water-drive remaining oil analysis model based on curve similarity by utilizing water-oil space distribution in different water-drive states to obtain fluid distribution difference in a core pore space; analyzing the distribution characteristics of the remaining oil in the core sample according to the fluid distribution difference in the core pore space; and predicting the oil reservoir recovery ratio by using the distribution characteristics. According to the water drive remaining oil analysis method provided by the invention, based on the digital core, the remaining oil formation mechanism and the dynamic change process are quantitatively analyzed from the pore scale, and the oil reservoir evaluation precision and the oil reservoir recovery rate can be improved.
Owner:XI'AN PETROLEUM UNIVERSITY
System and method for determining oil and water distribution
The embodiments of the invention provide a system and method for determining oil and water distribution. The method comprises the steps that a first computed tomography (CT) image and a second CT image of a rock core are obtained, the first CT image is the CT image of the rock core, the second CT image is the CT image when a water with added indicator is injected to the rock core, according to thefirst CT image, position alignment treatment and brightness normalization treatment are conducted on the second CT image, the treated second CT image is obtained, and according to the first CT imageand the treated second CT image, the oil-water distribution image of the state of the water with saturated addition of the indicator is obtained. By adopting the system and method for determining oiland water distribution, the oil-water distribution image of the pore scale of a reservoir stratum can be determined.
Owner:CHINA UNIV OF PETROLEUM (BEIJING)
Quantitative analysis device and method for saturation spatial distribution of fluid in rock
ActiveCN112577979AReduce absorptionVersatileMaterial analysis using wave/particle radiationFluid saturationRock core
The invention belongs to the technical field of petroleum scientific research. Aiming at the current situation that the quantitative analysis of the saturation distribution of fluid in rock does not reach a pore scale, the invention provides a quantitative analysis device and method for the saturation spatial distribution of fluid in rock. The method comprises the following steps of: injecting liquid in the overburden pressure state (no liquid exists), performing three-dimensional imaging on a rock core to obtain D1 and D2,and performing three-dimensional registration on the D1 and D2; obtaining D3 matched with D1 through the sampling of the D2; determining a threshold T1 based on overburden pressure porosity, and converting the D1 into a gap-matrix binary matrix; determining a threshold T2 based on the total fluid saturation, and modifying the value of the corresponding pixel in the D1 according to the gray scale of the gap pixel in the D3; extracting a pore network based on the gap pixel of the D1 to obtain pores, pore throats and corresponding pixel lists; counting the number of pixels occupied by two fluids in the pores and the pore throats and the total number of pixels to obtain pore fluid saturation; and counting the number, spatial distribution and shape factor relationship of the pores under different fluid saturations. According to the method, the spatial distributionof the fluid saturation of the pore size in a rock core can be obtained nondestructively and quantitatively.
Owner:INST OF MECHANICS - CHINESE ACAD OF SCI
Microsphere oil displacement agent used for improving recovery efficiency
InactiveCN104974732AImprove temperature resistanceImprove featuresDrilling compositionPotassium persulfatePolymer science
The invention discloses a microsphere oil displacement agent used for improving recovery efficiency. According to the invention, the participations of an acrylamide crystal, N,N'-methylene bisacrylamide, styrene and potassium persulfate enable gel ductility of polymer gel microspheres to reach the maximum; meanwhile, good characteristics of temperature resistance and mineralization resistance and enormous quantitative characteristic are obtained, and online injection can be realized; pore-scale polymer microspheres can be migrated in the core and has high a resistance coefficient and a residual resistance coefficient; the resistance coefficient of a compound system of microspheres and a polymer solution in the core is much higher than the resistance coefficient of a pure polymer solution system in the core, and synergistic effects and higher abilities of increasing the swept volume and preventing the polymer solution from flowing in a highly-penetrable pore channel are obtained; and the pore-scale polymer microspheres have good adaptability to nonhomogeneity of an oil layer, so that the injection water swept volume can be significantly expanded; water content of an oil well is reduced; and crude oil output is increased.
Owner:东营市惠好科技开发有限责任公司
Method and device for predicting oil-gas effective reservoir in sandstone
PendingCN112711068AImprove forecast accuracyImprove recognition accuracySeismic signal processingLongitudinal waveGeophysics
The invention relates to a method and device for predicting an oil-gas effective reservoir in sandstone. The method comprises the steps: recognizing a sandstone development region through the root-mean-square amplitude attribute of post-stack seismic data; recognizing pore sandstone development area with a certain pore scale in the sandstone development area through intersection inversion of natural gamma frequency division and longitudinal wave impedance, wherein the recognition precision is high; and finally carrying out oil-gas detection on the pore sandstone development area with a certain pore scale by utilizing the characteristics of low-frequency increase and high-frequency attenuation of the oil gas, and predicting the distribution area of the oil-gas effective sandstone, so that the distribution range of the sandstone oil-gas effective reservoir is finely described, sandstone porosity prediction from sandstone reservoir prediction is realized, oil and gas content detection is gradually deepened, and the prediction precision of sandstone oil and gas effective reservoirs is improved.
Owner:CHINA PETROLEUM & CHEM CORP +1
Who we serve
- R&D Engineer
- R&D Manager
- IP Professional
Why Patsnap Eureka
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com