174 results about "Capillary pressure" patented technology

The invention discloses a capillary pressure and contact angle synchronous characterization method and device of a microfluidic fluid interface, and relates to the field of interface analysis and multiphase seepage in pore media, and the method comprises the following steps: based on a pre-configured pore, particle and fluid binary image, distinguishing and extracting a fluid-particle contact interface contour and an attack / defense fluid interface contour; fitting and determining the curvature radius of each fluid interface contour through a watershed region division algorithm and reordering smoothing of Fourier descriptors; generating a multi-level size pore space based on the pore binary image, and obtaining a pore overlook radius; calculating a necking angle in combination with the curvature radius and the multi-stage size pore space to obtain an apparent contact angle and an intrinsic contact angle; and calculating the capillary pressure of the attack / defense fluid interface by combining the curvature radius, the pore overlook radius, the chip depth and the interfacial tension. According to the invention, high-precision technical support is provided for micro-fluidic multiphase seepage research.

The embodiment of the invention provides an unconventional oil reservoir oil extraction contribution degree determination method and device, equipment and a medium. The method comprises the steps that the relation between the saturation degree of wet-phase fluid and capillary pressure in an oil reservoir is determined according to a plurality of reference capillary pressure curves; performing simulation analysis on the crack propagation direction and the seepage pressure in the oil reservoir volume fracturing process, and determining a three-dimensional propagation rule of the crack and artificial crack parameters; performing coupling processing on the three-dimensional fracture model and the matrix attribute model to obtain an oil reservoir geological engineering integrated model; establishing a numerical simulation model according to the relationship between the wet-phase fluid saturation and the capillary pressure and the reservoir geological engineering integrated model; performing numerical simulation on the oil reservoir development process through the numerical simulation model to obtain data simulation results of the oil reservoir in different development stages; the oil production contribution degrees of displacement and imbibition in different development stages of the oil reservoir are determined according to a data simulation result, and a theoretical basis and technical support are provided for oil reservoir exploitation.

The invention discloses a heat pipe, a radiator and electronic equipment. The heat pipe comprises a pipe body, a first capillary structure and a second capillary structure. A containing cavity is formed in the pipe body and used for sealing and storing working fluid. The first capillary structure is attached to the inner pipe face of the pipe body. The second capillary structure is wrapped in the first capillary structure. According to the heat pipe, the first capillary structure with large capillary pressure wraps the second capillary structure with large permeability, so that the composite capillary structure with the high-speed backflow channel is formed in the heat pipe, and the advantages of different capillary structures are fully utilized; and the working fluid in the heat pipe quickly and fully participates in circulating heat transfer of liquid phase-gas phase change, so that the heat transfer performance of the heat pipe is improved.

The invention relates to the technical field of reservoir engineering, and discloses a physical information neural network numerical simulation method suitable for a low-permeability water-drive reservoir, and the method comprises the steps: employing a finite volume method for full implicit solution, and considering strong nonlinear seepage; an expert experience loss function is constructed, the pressure saturation output range is limited, and the solving efficiency is improved; a full-connection neural network is adopted as a basis, and adjacent position anchoring, a self-adaptive activation function and a jump connection gating updating structure are added; respectively solving pressure and saturation by using two independent networks; introducing a well model to process a large pressure gradient problem; and substituting the pressure and saturation calculated by the network into a loss function to carry out back propagation to optimize the network. The method has high prediction precision when processing complex problems such as large capillary pressure and non-linear seepage, the problem that an existing physical information neural network is difficult to adapt to low-permeability water drive reservoir numerical simulation is effectively solved, and the whole training process does not need to depend on any label data.

The invention discloses a multilayer circuit board preparation method and system based on via hole filling optimization and a multilayer circuit board, and relates to the technical field of circuit board preparation, and the method comprises the steps: obtaining the size of a via hole, calculating the depth-to-width ratio, constructing a viscosity gradient function, taking a via hole filling quality evaluation index as a first optimization target, and solving an optimal ratio; designing a vacuum degree control strategy; the current capillary pressure is obtained, differential pressure driving force is calculated according to the current through hole gas pressure intensity, the time needed for filling and the preset ultrasonic vibration duration are calculated in combination with the through hole diameter, the hole depth and the viscosity gradient function, and ultrasonic auxiliary filling is carried out while through hole filling is carried out; filling the via hole, and controlling the vacuum degree according to the vacuum degree adjusting curve; and the real-time filling rate and the cavity volume are obtained, a second target function is constructed with the difference between the minimum target filling rate and the actual filling rate and the filling cost as a second optimization target, and the optimal filling step number and the optimal single injection material volume are solved.

A semiconductor apparatus includes a semiconductor chip including a semiconductor integrated circuit, a cooling channel at least partially in the semiconductor chip and including a fine pattern on at least a portion of a wall surface of the cooling channel, the fine pattern configured to generate a capillary pressure that induces a flow of a liquid coolant, and a temperature controller configured to control a supply temperature of the liquid coolant supplied to the cooling channel.

The invention provides a multiphase multicomponent seepage numerical simulation method based on a discrete fracture model. The method comprises the following steps: step 1, establishing a multi-phase multi-component seepage mathematical model, and solving; step 2, mesh generation of the discrete fracture model; step 3, discretization of a mass conservation equation; step 4, calculating the conductivity between the matrix and the crack; and 5, establishing a nonlinear equation set, and completing solution by adopting an automatic differential technology and a Newton iteration method. According to the method, a complex fracture network is represented through a discrete fracture model, reservoir stress sensitivity and nonlinear seepage characteristics are considered, adsorption and diffusion effects of a surfactant and salt and mechanisms such as capillary pressure, relative permeability curve and osmotic pressure change under the action of the surfactant and the salt are coupled, and a multi-phase multi-component seepage mathematical model is established. According to the method, fracture explicit representation is achieved through a self-adaptive mesh generation method, a finite volume method is adopted for solving, the model is established, and therefore ultra-low permeability-tight oil reservoir development simulation under the influence of a complex fracture network is achieved.

Systems and methods are described for correcting ambient condition capillary pressure curves. In an example, the capillary pressure curve of a porous medium can be measured in non-reservoir conditions. Samples of the porous medium can be scanned at various confining pressures, and digital models of the scans can be created by a computing device. The computing device can simulate a porous plate experiment on the digital models to create a capillary pressure curve for each model. The computing device can calculate fitting equations for each capillary pressure curve according to capillary pressure points. The fitting equations can be averaged together and applied to the capillary pressure curve of the porous medium to correct for the non-reservoir conditions.

The invention relates to a shale or coal rock gas evaluation method based on a gas-water two-phase flow isotope fractionation model. The shale or coal rock gas evaluation method comprises the following steps: 1, collecting data; 2, establishing a gas well model; 3, establishing a control equation set; 4, coupling the influence of the real gas effect and the effective stress; 5, establishing a gas transmission model and a relative permeability model; 6, establishing a relation between capillary pressure and saturation; 7, considering critical desorption pressure; 8, setting boundary conditions of initial conditions; 9, solving a control equation set; 10, calculating production dynamic parameters and isotope values; 11, performing history fitting; 12, verifying historical fitting quality; 13, predicting productivity; 14, calculating a gas dynamic output proportion; 15, identifying a fractionation inflection point and gas production mechanism conversion; by coupling gas-water two-phase flow, multiple gas transmission mechanisms, stress sensitivity and methane isotope competitive adsorption theories, yield prediction of the deep reservoir and quantitative evaluation of the dynamic proportion of produced gas are realized.

A system for cooling a liquid for lubricating an aircraft turbomachine, includes an exchanger including a cooling volume and a circuit for cooling a heat-transfer fluid by a loop for circulating the two-phase fluid, with thermocapillary pumping. The cooling circuit includes a condenser including channels connected in parallel to one another in order to make it possible to cool the fluid circulating in the condenser from a vapour state to a liquid state, a first capillary evaporator of the exchanger in order to absorb the heat of the lubricating liquid in the first volume, the first evaporator including a capillary porous wick for separating the heat-transfer fluid in the two-phase state between a liquid state and a gaseous state by a capillary pressure jump.

The invention relates to the field of heat exchange and heat conduction, in particular to a composite wick, a vapor chamber and a heat pipe. Comprising a first material layer which is provided with a first surface and a second surface, the first surface and the second surface are respectively provided with a diversion trench, and the diversion trench on the first surface and the heat conduction element shell jointly define a capillary channel; the second material layer is attached to the second surface of the first material layer, and capillary channels are defined by the second material layer and the flow guide grooves in the second surface of the first material layer. The first material layer and the second material layer of the wick and the shell define the capillary channel, the open flow guide grooves in the first material layer form the capillary channel, the flow speed and flow of working medium backflow are increased, and then the heat transfer capacity is improved. The characteristics of high capillary pressure and large flow can be achieved at the same time by regulating and controlling the size of the capillary channel of the first material layer and the size of the steam through hole of the second material layer of the wick.

The invention belongs to the technical field of oil and gas reservoir engineering and multiphase seepage dynamic monitoring, relates to a characterization method of seepage behaviors of multiphase fluid in a porous medium, and particularly provides a dynamic construction method of a multiphase displacement capillary pressure-saturation relationship based on nuclear magnetic resonance. Comprising the following steps: S1, acquiring a low-field nuclear magnetic resonance relaxation spectrum of a porous medium in a gas-water two-phase displacement process; s2, determining two-phase fluid interfacial tension, a wetting contact angle and a rock surface relaxation rate; s3, determining the dynamic cut-off relaxation time of the displacement stage; s4, calculating equivalent capillary pressure; the residual water saturation is calculated, and the equivalent capillary pressure is the capillary pressure corresponding to the current displacement stage and is used for constructing a capillary pressure-saturation curve. According to the method, the capillary pressure change in the porous medium can be obtained only through spectral analysis without a centrifugal or mercury injection experiment.

The invention discloses a metamorphic rock buried hill fractured reservoir imbibition characteristic curve calculation method. The method comprises the steps that samples of different matrix rock mass types in a target area are collected; the novel reverse imbibition experiment device is used for carrying out an imbibition experiment; drawing an experimental imbibition recovery ratio change scatter diagram; establishing an oil and water relative permeability and capillary pressure curve representation function; establishing an imbibition mathematical model under the cylindrical coordinate system, and calculating a theoretical imbibition recovery ratio; fitting by adopting a least square method and a genetic algorithm to obtain imbibition characteristic parameters; drawing imbibition characteristic curves of different types of matrix rock blocks; establishing a geologic model; and carrying out numerical simulation by adopting a relative permeability zoning mode, and the like. The method is reliable in technical principle and clear in logic, prediction of the relative permeability curve and the capillary force curve of the matrix rock core is more accurate, and the method has important significance in research on fine numerical simulation, remaining oil prediction, water injection strategy optimization and the like of a double-hole single-permeability oil reservoir.

A capillary pressure measurement device includes a centrifuge having a rotating apparatus adapted to hold porous media samples and to test the samples under centrifugal motion during rotation of the rotating apparatus. A fluid capture device disposed adjacent to each porous media sample receives fluid displaced from the sample due to centrifugal motion applied to the sample during rotation. A measurement system measures an amount of fluid displaced from the porous media samples by taking an image of a fluid meniscus in the fluid capture device. A position sensor determines a position of the fluid capture device and triggers a camera to take the image of the fluid meniscus when the fluid meniscus is in a field of view of the camera. The image of the fluid meniscus is processed to determine a fluid volume correlated to capillary pressure of the corresponding porous media sample.

The invention discloses an autoclaved aerated concrete material and a preparation method thereof, and belongs to the technical field of novel building materials. The graphene oxide loaded calcium carbonate and the graphene oxide are added into the material provided by the invention, nucleation sites generated by the graphene oxide loaded calcium carbonate cause a deep microstructure of the material to directionally generate a fiber-like nanoneedle-shaped multi-stage micro-nano structure, and nanowires are split from tips of the nanoneedle-shaped structure and are filled in capillary pores and microscopic pores, so that the nanowires are uniformly dispersed in the micro-pores and the micro-pores; the appearance of a meniscus is effectively avoided, the compactness is increased, the pressure of capillary pores can be further dispersed by the nanowires, and the pressure difference of the capillary pores is reduced, so that drying shrinkage is avoided. The graphene oxide ions can reduce the gravitation between the colloidal particles and block the distance between the particles, so that drying shrinkage is further avoided. Therefore, the material provided by the invention can effectively solve the cracking problem caused by drying shrinkage, the durability of the material is improved, and the service life of the material is prolonged.

The invention discloses a soil or groundwater remediation agent in-situ precise injection and transmission effect evaluation test system, and belongs to the technical field of stratum pollution remediation. The device comprises a stratum simulation assembly, a stratum pressurization assembly and a parameter detection assembly, wherein the stratum simulation assembly comprises an experimental silo for storing a simulated stratum sample; the stratum pressurization assembly is arranged opposite to the experiment silo and can simulate pressure of different stratum depths; the parameter detection assembly comprises a plurality of pressure detection units which are vertically arranged at intervals along the experimental silo, each pressure detection unit comprises a capillary pressure measuring pipe and a plurality of pressure sensors, the capillary pressure measuring pipes are arranged in the radial direction of the experimental silo, and one end of each capillary pressure measuring pipe is communicated with the simulated stratum sample through the experimental silo; and the plurality of pressure sensors are arranged at intervals along the capillary piezometric tube so as to test the osmotic pressure of different positions of the capillary piezometric tube. Laboratory simulation can be carried out on the process of repairing the polluted stratum by the repairing liquid.

The invention discloses a carbonate rock water saturation modeling method and device based on pore structure classification, and belongs to the technical field of rock physics and well logging interpretation. Carrying out matched conventional pore permeability, rock electricity, casting body slice, nuclear magnetic resonance and constant-speed mercury injection experiments on the reservoir core; dividing pore structures into four types according to core casting body sheet characteristics, nuclear magnetic resonance T2 spectrum distribution characteristics and capillary pressure curve forms; the actual water saturation of the reservoir rock core is obtained according to the nuclear magnetic resonance experiment in the rock core saturation and centrifugal state; respectively fitting rock electrical parameters for the four pore structure types; and calculating the water saturation of the whole well section in combination with an Archie formula. According to the method, the relation between the carbonate rock pore structure and the rock electrical parameters is fully excavated, the problem that the non-Archie phenomenon of the heterogeneous carbonate rock reservoir is serious is solved, and the calculation precision of the water saturation is greatly improved.

The present application provides a method, device, computer equipment and storage medium for determining reservoir types, and belongs to the field of oil and gas exploration technology. The method includes: determining a rock sample of a target reservoir; obtaining a capillary pressure curve corresponding to the rock sample, the capillary pressure curve is used to represent the corresponding relationship between the mercury injection pressure and the mercury injection volume of the rock sample; fitting the capillary pressure curve through a first objective function to obtain a first fitting parameter, the first fitting parameter includes a first displacement parameter and a first pore morphology parameter; according to the first displacement parameter and the first pore morphology parameter, through a second objective function, determining a first classification parameter of the rock sample; according to the parameter interval where the first classification parameter is located, determining the reservoir type of the reservoir. Since the first fitting parameter is obtained by fitting the capillary pressure curve, the method for determining the reservoir type will not be limited by the pore structure of the rock sample, thereby improving the accuracy of determining the reservoir type of the reservoir.

The present invention relates to the technical field of oil and gas field development, and specifically relates to a method for converting the transverse relaxation time distribution into the capillary pressure distribution. The present invention proposes a correction coefficient for converting the high-pressure mercury intrusion pore throat radius into the transverse relaxation time, and then obtains the conversion coefficient by using linear interpolation and volume ratio weighting, and establishes a method for converting the transverse relaxation time distribution into the capillary pressure distribution, providing a technical reference for studying the microscopic structure and properties of reservoirs.

The invention provides a flexible heat pipe based on a bionic directional liquid conveying structure and a manufacturing process, relates to the field of flexible heat pipes, and aims to solve the problem that the heat dissipation efficiency of a current flexible heat pipe is difficult to meet the requirement. A liquid suction channel and a protruding column are formed on a flexible base body of the flexible heat pipe, and the protruding column is of a bionic structure; the capillary pressure of the working medium pumped by the flexible substrate serving as the wick is improved, the gas-liquid circulation in the flexible heat pipe is effectively improved, and the heat dissipation effect of a local area is enhanced, so that the heat dissipation capability and the environmental stability of the flexible heat pipe are improved, and the service life of electronic equipment is prolonged.

The invention discloses a concrete stress monitoring method based on a wet-force coupling effect and a capillary water theory, and the method comprises the steps: measuring the capillary pressure change of pores in concrete through a tensiometer, and calculating the concrete stress according to the wet-force coupling effect and the capillary water theory. The invention relates to the technical field of concrete materials. According to the concrete stress monitoring method based on the wet-force coupling effect and the capillary water theory, real-time monitoring of a structure can be achieved, the cost is low, compared with common strain measurement, the novel stress monitoring method is provided, and the method is based on an early-age concrete wet-force coupling model and the capillary water theory and has the advantages of being high in practicability and easy to popularize. The stress of the concrete structure is monitored by measuring the capillary pressure change of pores in the concrete, and the real-time safety of the structure is ensured.

The application discloses a reservoir gas-water relative permeability determination method, and relates to the field of reservoir permeability determination. The method comprises the following steps: obtaining a core sample of a target reservoir and determining the geometric size of the core sample; injecting simulated formation water into the core sample until the core sample is saturated, and performing nuclear magnetic scanning to obtain a reference nuclear magnetic signal and an initial porosity distribution; performing a multistage gas injection pressure experiment in an intermittent displacement mode to obtain quasi-steady-state displacement data; constructing a two-phase percolation numerical model with phase permeability curve parameters and capillary pressure curve parameters as to-be-inverted parameters; constructing a target function based on the quasi-steady-state data and performing inversion solving to obtain optimal parameters; and determining the phase permeability curve and the capillary pressure curve based on the optimal parameters. The application obtains the fluid distribution inside the core through nuclear magnetic resonance, obtains quasi-steady-state data in combination with intermittent displacement, and inversely solves the phase permeability and the capillary pressure, so that the problem that the fluid distribution inside the core cannot be accurately reflected and the multi-solution problem cannot be solved is solved, and the influence of the capillary end effect is eliminated.

The present invention discloses a method for predicting the recovery rate of deep coalbed methane, comprising: determining correction values ​​of physical parameters, capillary pressure, reservoir porosity and water saturation, as well as average coal reservoir pressure, cumulative water production and conventional average deviation coefficient of gas under multiple production dates, calculating the actual average deviation coefficient of gas, establishing a prediction model for reservoir gas production, calculating an iterative value of a control volume according to the correction values ​​of physical parameters, capillary pressure, reservoir porosity and water saturation and original gas reserves of the reservoir, returning the iterative value to an initial given value that replaces the control volume for cyclic calculation, determining a first relationship model between cumulative water production and average coal reservoir pressure, determining a vertical axis prediction value of the prediction model under a given exhaust gas pressure according to the first relationship model, substituting the vertical axis prediction value into the prediction model established last time in the cyclic calculation to obtain the recoverable reserves of coalbed methane and calculate the recovery rate, thereby achieving the purpose of improving the reliability of the prediction.

The invention relates to the technical field of crystal structure prediction, and discloses a quantum algorithm-based energetic CxNyOz crystal structure prediction method, which comprises the following steps of: calculating an evaporation and diffusion dimensionless number and capillary pressure by obtaining surface tension, a contact angle, a geometric feature scale, temperature, partial pressure, a diffusion coefficient and an evaporation rate; establishing a residual solvent mole fraction and solvent chemical potential sequence; constructing a binary layer occupancy model Hamiltonian containing layer occupancy energy, adjacent layer action energy, a capillary pressure volume term and a molecular polarity action term, and obtaining a hierarchical occupancy number by using a quantum approximation optimization algorithm; calculating interlayer respiration and shear frequency and mode volume sensitivity based on a quantum variation algorithm; and finally, the lattice spacing and the prediction result are obtained through cost functional minimization, and accurate prediction and quantitative analysis of the structure of the energetic crystal under the unbalanced desolvation condition are realized.

The invention relates to the technical field of mine treatment, in particular to a mine environment treatment method and system based on an AI virtual simulation technology. The method comprises the following steps: acquiring a dynamic geological parameter set of a target mine; analyzing the dynamic geological parameter set, and determining liquid injection data and soil capillary pressure detection data; determining a composite diffusion mode of the treatment agent according to the liquid injection data and the soil capillary pressure detection data; analyzing the composite diffusion mode, and determining a spatio-temporal evolution rule; according to a spatio-temporal evolution rule, constructing an AI dynamic simulation model containing a treatment agent permeation feedback mechanism; based on the AI dynamic simulation model, performing multi-node data growth simulation on the plurality of treatment schemes, and generating a treatment effect evolution graph containing stratum response time-varying characteristics; analyzing the governance effect evolution graph, and determining the matching degree of the action depth of the governance agent in each governance scheme and the vegetation planting condition; and determining an optimal treatment scheme implementation path according to the matching degree.

The invention discloses a quantitative characterization method and device for the water seal gas degree of a deep water gas reservoir. The method comprises the steps that according to corresponding permeability, saturation and relative permeability index parameters in seepage control parameters of the deep water gas reservoir, the water-phase and gas-phase relative permeability of a matrix and a crack is determined, and the seepage control parameters are obtained based on a seepage mechanism of the water gas reservoir and comprise matrix and crack fluid channeling coefficients; determining displacement capillary pressure and imbibition capillary pressure according to water saturation, irreducible water saturation, threshold pressure, pore distribution coefficient, displacement contact angle and imbibition contact angle in the seepage control parameters; according to the given numerical value of the seepage control parameters and the determined parameters, water seal gas seepage simulation is conducted, and the natural gas recovery degree and the water seal gas degree are determined. According to the method, seepage control parameters are provided based on a water gas reservoir seepage mechanism, the natural gas recovery degree and the water seal gas degree are determined through seepage simulation, and specific quantification of the water seal gas degree is achieved.

The application provides a shale gas well recoverable reserves analysis method considering dynamic capillary effect, which utilizes shale gas well original production data to obtain a fitting relationship curve of original production and production time, further obtains effective production data, and obtains reservoir capillary pressure and dynamic capillary effect coefficient of each production time through the effective production data, further obtains initial ideal production considering dynamic capillary effect, fits basic parameters considering dynamic capillary effect, then obtains characteristic time, deduces future ideal production, and obtains future actual production after considering dynamic capillary effect again, and finally calculates recoverable reserves (EUR). The method can consider dynamic capillary effect, adopt a capillary bundle model, and make the analysis and prediction result more accurate.

The invention discloses a tight reservoir CO2-WAG oil displacement and burying capacity calculation method, device and equipment, and the method comprises the steps: constructing a first seepage control equation representing three-phase seepage control of a matrix system and a second seepage control equation representing three-phase seepage control of an artificial fracture system according to the law of mass conservation and momentum conservation; establishing a three-phase seepage auxiliary equation; and solving the first seepage control equation, the second seepage control equation and the three-phase seepage auxiliary equation based on the basic parameters of the tight reservoir of the target area, and calculating to obtain the productivity data of carbon dioxide-water vapor alternate driving carbon utilization and burying of the tight reservoir. According to the method, the influence of factors such as diffusion mass transfer, three-phase capillary pressure, three-phase relative permeability hysteresis and fluid channeling between fractures and matrixes on the CO2-WAG flooding seepage law of the tight reservoir is fully considered, and accurate and effective prediction and evaluation of the productivity and carbon dioxide burying potential of the tight reservoir in the target area can be achieved.

The utility model relates to heat pipe heat dissipation technical field especially, it relates to a V type metal wire woven net and have the heat pipe of this woven net. Its technical scheme includes: woven net cylinder, metal wire, pipe body and pipe head, the cross section of metal wire is V type design, each metal wire is woven into woven rope, each woven rope is interwoven in warp and weft direction and forms the V type metal wire woven net of plane net shape, V type metal wire woven net is completely rolled and forms woven net cylinder, woven net cylinder is inserted in the pipe shell inner wall of pipe body, woven net cylinder is arranged along the pipe shell axial direction of pipe body, both shape mutually adapts, the opening direction of V type groove on woven net cylinder is towards pipe body inner chamber, to utilize capillary pressure drive working liquid and return flow from condensation section to evaporation section. The utility model through V type cross section metal wire woven net cylinder can keep metal wire woven net lightweight and processing advantage, can improve capillary return flow capacity significantly, reduce flow resistance.