25 results about "Chamber experiment" patented technology

A method and a system for optimization of development by carbon dioxide injection based on incomplete miscibility characteristics are provided, where the method includes following steps: building a three-dimensional reservoir model based on laboratory experiments and reservoir values, where the three-dimensional reservoir model includes: a fluid model and a reservoir model; based on the three-dimensional reservoir model, obtaining incomplete miscibility characteristics of reservoir development by carbon dioxide injection; and completing whole life cycle optimization development of carbon dioxide injection based on the incomplete miscibility characteristics.

The utility model discloses a displacement device for a gas injection and oil extraction indoor experiment for synchronous core fracture forming, which comprises a horizontally placed core barrel, sealing covers arranged at two ends of the core barrel, a simulation injection pipe arranged on the sealing cover positioned at the front end, and a simulation extraction pipe arranged on the sealing cover positioned at the rear end, a confining pressure boosting pipe used for simulating formation pressure is arranged at the top of the middle of the rock core barrel, a sealing rubber sleeve is arranged in the rock core barrel, a simulation rock core is arranged in the sealing rubber sleeve, a plurality of fracture forming holes are formed in the side wall of the rock core barrel, a support is arranged on one sides of the fracture forming holes, and a fracture forming motor used for being in butt joint with the fracture forming holes is arranged on the support. According to the utility model, the outer wall of the rock core barrel is transformed, so that the rock core barrel can be matched with the fracture-forming motor which is placed on the bracket in advance, the rock core after displacement is finished is immediately subjected to simulated fracture-forming, the fracture-forming precision is high, the use and the operation are convenient and rapid, and the rock core fracture-forming device has guiding significance for indoor simulation of oil-gas field development.

The invention relates to a well mouth virtual metering method based on a regulating valve, and the method comprises the steps: building a virtual height prediction model and a liquid-gas ratio prediction model based on an indoor experiment; obtaining a gas phase mass flow initial value through a field test, correcting the gas phase mass flow initial value until the (i + 1)-time gas phase mass flow and the i-time gas phase mass flow meet circulation conditions, taking the i-time gas phase mass flow as a final gas phase mass flow predicted value, and further obtaining a final virtual high value corresponding to the final gas phase mass flow predicted value; and a final liquid phase mass flow prediction value is obtained according to the liquid-gas ratio prediction model. Compared with the prior art, the method has the advantages that the gas phase mass flow and the liquid phase mass flow are solved and calculated on the basis of the regulating valve, the calculation error is within a controllable range, and a new thought and a new method are provided for gas-liquid flow metering.

This article relates to the field of oil and gas field development engineering, and particularly relates to a method and device for evaluating the active utilization effect of the spatial stress field of a three-dimensional well pattern. The method includes obtaining a Mohr circle envelope line applicable to the rocks of the target layer based on a large number of indoor experiments on the target layer in the work area or empirical data from adjacent blocks; partitioning the space according to the Mohr circle envelope line and the spatial stress state of each point in the space of the three-dimensional well pattern, where the spatial stress state is the superposition of the spatial induced stress of each crack in the space on each point in the space and the original in-situ stress; calculating the active utilization coefficient of the stress field according to the size, position of the space, the weights of each partition in the space, and the proportion of the induced stress of each crack in the space on each point in the space; quantitatively evaluating the active utilization effect of the spatial stress field according to the active utilization coefficient of the stress field. Through the embodiments of this article, the quantitative evaluation of the active utilization effect of the spatial stress field is realized, thereby improving the evaluation accuracy.

The present application relates to the technical field of indoor experiment of simulating marine landslide, and particularly relates to an indoor experiment device for simulating marine landslide.The present application provides an indoor experiment device for simulating marine landslide, which comprises a base, a glass box fixedly connected to the base, a test piece rotatably connected in the glass box, a first motor installed on the glass box, an output shaft of the first motor connected to the test piece through a coupling, a clay collecting box placed on the bottom wall in the glass box, and the clay collecting box located below the test piece.The present application stores different kinds of experimental soil in multiple storage boxes, so that different soil qualities can be switched conveniently for experiment, and diversified research requirements can be met;in addition, the combination of the missing gear, the straight gear, the second blocking piece and the isolation cloth can quickly clean the experimental soil, maintain the cleanliness and preparation state of the device, the whole experiment process is simple and clear, the operation is convenient, the labor intensity of the experimental personnel is reduced, and the efficiency and accuracy of the experiment are improved.

The invention relates to the technical field of indoor experiments for simulating ocean landslides, in particular to an indoor experiment device for simulating ocean landslides. The indoor experimental device comprises a base and the like, a glass box is fixedly connected to the base, a test piece is rotatably connected to the interior of the glass box, a first motor is installed on the glass box, an output shaft of the first motor is connected with the test piece through a coupler, and a clay collecting box is placed on the inner bottom wall of the glass box; and the clay collecting box is positioned below the test piece. According to the device, multiple material storage boxes are arranged to store different types of experimental soil, so that different soil properties are conveniently switched for experiments, diversified research requirements are met, gushing experimental soil can be quickly cleaned through cooperation of a missing gear, a straight gear, a second blocking piece and isolation cloth, the clean and preparation state of the device is kept, and the experimental efficiency is improved. The whole experiment process is simple and clear, the operation is convenient, the labor intensity of experimenters is reduced, and the experiment efficiency and accuracy are improved.

The utility model discloses an improved device for measuring the stone rate of grouting slurry in a goaf. The device comprises a triple bottomed test mold, a triple bottomless test mold, a detachable fixed baffle and a base, each of the triple bottomed test mold and the triple bottomless test mold is formed by connecting a graduated detachable partition plate and a graduated detachable baffle through a limiting groove and a limiting block; the base is provided with a groined groove, and the detachable fixed baffle is installed on the base in a sliding mode along the groined groove. The device can be used for preparing the stone body test block with the standard size meeting the specification, and the problems that the test block cannot be formed at a time and the height of the test block does not reach the standard are solved. All parts of the device are detachable, so that the device is convenient to carry and meets the use requirements of indoor experiments and outdoor experiments.

The present application relates to the field of oil and gas field development engineering, disclose a kind of intelligent optimization method for discrete element contact parameters of proppant particle and flexible fiber mixture, comprising: based on the principle of injection method angle of repose experiment, build micro funnel device, reduce the scale of experiment under the premise of keeping the original size of material, improve the efficiency of calculation;Adopt "ball column chain + joint" fiber model, coupling JKR adhesion model represents the interfacial adhesion between particles, establish high-precision discrete element simulation model;Through Plackett-Burman, steepest climbing experiment screening key influencing factors, for the problem that each factor and angle of repose is nonlinear mapping relationship, construct GA-BP model, combine GA algorithm optimization, preferred parameter combination, compare the results of discrete element simulation and laboratory test results, verify the accuracy of contact parameters.The present application solves the problem that the existing method is difficult to calibrate mixture, improves the precision and efficiency of parameter calibration, and is helpful to the research and development of hydraulic fracturing process.

The invention discloses an electric field, liquid phase discharge and ultrasonic coupling oil displacement indoor experiment method and device. The method comprises the following steps: constructing an indoor simulation experiment model corresponding to a target oil reservoir according to a core, formation water and crude oil of the target oil reservoir; injecting formation water into the indoor simulation experiment model; and applying at least two types of physical fields of an electric field, liquid phase discharge and ultrasonic waves to the indoor simulation experiment model, performing oil displacement on the indoor simulation experiment model based on the at least two types of physical fields, and recording action parameters and oil displacement yield of the at least two types of physical fields in the oil displacement process. By the adoption of the technical scheme, the experimental data are determined through the coupling oil displacement experiment of the electric field, the liquid phase discharge and the ultrasonic waves, then the action parameters of the at least two types of physical fields capable of improving the oil displacement recovery efficiency are determined, and the recovery efficiency during actual oil displacement is improved.

The utility model relates to a high-gas strong-mine-pressure hybrid dynamic disaster experiment device, and relates to the technical field of indoor experiment equipment, the high-gas strong-mine-pressure hybrid dynamic disaster experiment device comprises an experiment box and an experiment assembly, the experiment box is internally provided with a sample; the test assembly comprises a gas control part and a test part, and the gas control part is arranged on the test box and used for simulating gas pressure in the test box; the test part is arranged on the test box and is used for carrying out a pressure detection test on the sample. The method has the effect of improving the accuracy of experimental results.

The utility model discloses a 96-hole electronic pipettor which comprises a pipettor body, a controller is fixedly connected to the top of the front end of the pipettor body, a base is fixedly connected to the bottom end of the pipettor body, and a position plate, an electric push rod, a rotating block, a limiting shaft, a multi-stage electric push rod, a clamping block and an infrared sensor are arranged, when the device is used for pipetting operation during a biological experiment, the position plates are vertically distributed on one side of the device, then the position plates are sequentially controlled to drive the limited consumables to rotate to the bottom of the pipettor during the pipetting operation, and the multi-stage electric push rod is controlled to stretch out every time the position plates are controlled to drive the limited consumables to rotate to the bottom of the pipettor; each position plate containing consumables is pushed to the specified height to be matched with a pipettor for pipetting operation, and when the device is used for pipetting, the overall size of the device is reduced, so that the space occupied by the device on an experiment table top in a biological laboratory is reduced, and other experiment equipment can be conveniently placed.

The invention discloses a small-well-spacing chemical flooding comprehensive adjustment method, relates to the field of oil production engineering, and solves the problems that indoor experiments cannot completely simulate oil reservoir conditions, the field test period is long, and the popularization and application process of a new method is affected. The method comprises the following steps: S1, an oil displacement system applied to a small well spacing test is an alkali-free ternary system; s2, carrying out quality inspection on the chemical agent to ensure the quality of the chemical agent; the injection-production well monitoring and testing period is encrypted, adjustment is conducted according to dynamic changes, and the injection quality in the chemical flooding stage is ensured; s3, measures are taken for the injection well with the small pressure space in the blank water drive stage, the injection condition is improved, and the injection agent pressure space is guaranteed; and S4, aiming at the conditions of slow injection pressure rising and high sampling agent concentration in the chemical flooding process, optimization scheme design is carried out, tracking adjustment is enhanced, and the effect of the test area is promoted. According to the adjusting method, a two-lifting and one-stopping adjusting mode is adopted for adjusting plugging, the center well is promoted to further become effective, and the test development effect is ensured.

The utility model provides an indoor experimental determination device for tunnel water-rich fault fracture zone permeation, belongs to the field of water-rich fault fracture zone permeation determination, and is used for solving the problem that a permeation experimental device in the prior art cannot observe various states of a sample soil body eroded by different water levels. Comprising a test box main body, a water level simulation mechanism, a permeability coefficient determination mechanism and a wastewater treatment mechanism, the observation window is formed in the side wall of the experiment box main body of the measuring device, so that the form change of a sample in the accommodating cavity in the experiment process is conveniently observed; a water level simulation mechanism is additionally arranged, a water tank fixedly connected to the output end of a water tank lifting assembly is communicated with the upper end of the experiment box body, the water level in the experiment box body is adjusted, and the water level in the experiment box body is measured by observing and recording all states of a sample soil body eroded by different water levels and the measured pressure under the fluctuating water level. And the measurement of the tunnel water pressure under the fluctuating water level is completed.

The invention provides an indoor experiment evaluation method for rock damage and deterioration caused by circulating energy storage, and belongs to the technical field of geological hydrogen storage, and the method comprises the steps: carrying out the first scanning of a rock sample, and obtaining a rock internal structure picture before an experiment; the rock samples are assembled; a controller in the circulating storage and release control module is utilized to repeatedly inject and exhaust gas into and from the rock core assembly, and multiple circulating storage and release experiments are completed at different pressure intervals and different gas injection rates; under the assembly condition of the circulating storage and release experiment, the permeability test module is used for injecting gas into the rock core assembly, and the rock permeability is obtained through calculation; and obtaining damage condition data of the rock sample by combining the rock internal structure picture before the experiment and the rock internal structure picture after the experiment. By means of the indoor experiment evaluation method for rock damage and deterioration caused by circulating energy storage, hydrogen can be circularly stored and released, meanwhile, damage evaluation can be conducted on a salt rock sample, and the rock damage monitoring and characterization accuracy is improved.

The utility model discloses an indoor experiment evaluation device for shale oil well dynamic wax precipitation, and belongs to the technical field of oil and gas exploitation. Comprising an injection unit which is connected with a mixing unit and is used for conveying experimental fluid to the mixing unit; the mixing unit is connected with the pipeline simulation unit and is used for mixing experimental fluid and inputting the mixed experimental fluid into the pipeline simulation unit; the pipeline simulation unit is connected with the pressure control unit and is used for simulating a fluid flowing environment in a shaft; the temperature control unit is arranged below the pipeline simulation unit, is connected with the data processing unit and is used for adjusting the temperature of the pipeline simulation unit; the monitoring unit is connected with the pipeline simulation unit and the data processing unit and is used for monitoring the temperature, pressure and wax precipitation state in the pipeline simulation unit; the data processing unit is connected with the temperature control unit and the monitoring unit and used for collecting and processing experimental data. The device simulates the temperature, pressure and fluid flowing state of a complex environment in a shaft, and dynamically researches the paraffin precipitation behavior and rule of an oil well.

The invention relates to the technical field of indoor experiment scale rockburst monitoring, in particular to a method, system, equipment and medium for simulating indoor experiment scale rockburst monitoring, and the method comprises the following steps: preparing a sample with an open pore structure, and spraying speckles on the wall of the open pore; rigid base plates with hollowed-out structures are installed on the two sides of the sample hole, an acoustic emission sensor is embedded into the rigid base plates, and a camera stretches into the sample hole through a support; integrating the sample and the rigid base plate into a pressure chamber of a true triaxial testing machine, loading in stages according to a preset stress path, and synchronously acquiring an acoustic emission signal and image data of an in-hole damage process; correlation analysis is carried out according to the collected signals and image data, and a rockburst triggering mechanism model is established. The method has the beneficial effects that a multi-dimensional comprehensive monitoring means is provided for laboratory rock burst research, the rock burst phenomenon understanding and prediction precision is improved, and rock mechanics and underground engineering construction development is assisted.

A method for determining the water-drive initiation pressure in low-permeability reservoirs relates to the field of oil and gas field development technology, solving the problems of unstable, inconsistent, and difficult-to-apply initiation pressure results obtained by existing indoor experimental measurements and field indicator curve testing methods. The method includes the following steps: S1: Obtain basic data on the low-permeability reservoir in the study area; S2: Obtain the initiation pressure of mercury using mercury intrusion porosimetry (MIP) curves; S3: Based on the initiation pressure of mercury from the core, obtain the initiation pressure of mercury below the injection-production well distance; S4: Based on the obtained initiation pressure of mercury below the injection-production well distance, convert the initiation pressure of mercury below the injection-production well distance into the initiation pressure of water. This method for determining the water-drive initiation pressure in low-permeability reservoirs can reduce the influence of experimental instrument accuracy and eliminate the influence of testing under field conditions, obtaining a relatively stable, more consistent, and more practical initiation pressure value, facilitating the application of seepage theory research and various field scheme designs.

The present application relates to the technical field of oilfield production engineering, and particularly relates to a wellbore plugging agent evaluation method and a wellbore sealing integrity evaluation device. The present application mainly solves the problem that the existing wellbore plugging agent evaluation method cannot evaluate the performance of the plugging agent under the working conditions of high pressure, high CO2 and other acid gas wells. The present application comprises the following steps: selecting a plurality of plugging agents with different formulations according to the working conditions of the experimental area, and respectively performing basic performance testing, injection performance testing, interfacial cementation strength evaluation and corrosion performance evaluation; performing long-term corrosion resistance experiment on the plugging agent; and using the wellbore sealing integrity evaluation device to perform full-size wellbore sealing integrity evaluation experiment on the plugging agent. The wellbore plugging agent evaluation method optimizes different plugging agents through laboratory experiments, and simulates the actual production conditions through full-size experiments, so as to finally screen out the plugging agent that meets the field working conditions, thereby providing guarantee for efficient treatment of gas wells.

The present invention discloses a method for adding a temporary plugging agent in dynamic temporary plugging of a tight gas horizontal well, comprising the following steps: S1. establishing a single-cluster hole abrasion model using Ansys finite element analysis software; S2. calibrating the model through an indoor hole abrasion experiment; S3. simulating the fracturing process using the model in S1 and obtaining the hole friction resistance P. perf , hole diameter after pressing D ave ; S4. After the fracturing, perform a step-down test and obtain the total hole friction resistance P through the fracturing analysis software perf总 S5. Determine the number of perforation clusters to be opened and determine the dosage of temporary plugging agent. The method for adding temporary plugging agent for dynamic temporary plugging of tight gas horizontal wells provided by this invention combines laboratory experiments with numerical simulations to achieve precise placement of temporary plugging agent, improve the success rate of dynamic temporary plugging, increase the fracturing stimulation volume, and enhance post-fracturing production capacity.

The application discloses a design method of a natural gas hydrate exploitation experiment model parameter, and comprises the following steps: establishing a three-dimensional dynamic decomposition mathematical model of a natural gas hydrate reservoir by a mass conservation equation, an energy conservation equation, a definite solution condition and an auxiliary equation of each component of the natural gas hydrate reservoir; performing non-dimensionalization on the obtained three-dimensional dynamic decomposition mathematical model of the natural gas hydrate reservoir, and obtaining a plurality of similarity parameters; defining two characteristic times according to a flow control mechanism and a decomposition control mechanism of the natural gas hydrate reservoir exploitation, and then performing proportional modeling on the obtained similarity parameters; and designing the natural gas hydrate experiment model parameter according to the modeling result. The application can quantitatively connect the indoor experiment result with the mining practice.

Karst aquifers are composed of media such as bedrock fractures and karst conduits. Existing models usually assume that they conform to Darcy's law and use linear equations or non-linear equations with fixed power exponents to quantitatively describe the pipe-matrix exchange flow in karst conduits, and cannot reflect the non-linear exchange flow process between pipes and matrices under different karst wide fracture development conditions. Aiming at the above deficiencies, the present invention proposes a calculation method for pipe-matrix water flow exchange based on karst fracture development. By designing indoor experiments to simulate different degrees of fracture development, the regression analysis method is used to fit the experimental data to propose a non-linear exchange flow equation Q ex = α(H c ―H m ) n , where the non-linearity n varies according to different wide fracture developments, and its value range is 0.5 ≤ n ≤ 1. Based on the above equation, the CFP model is improved. The numerical simulation results of the designed indoor experiments are 11% and 12% higher than the original CFP model in terms of the coefficient of determination (R 2 ) and the Nash efficiency coefficient (NSE) respectively, and the root mean square error (RMSE) and percentage bias (PBIAS) are reduced by 45% and 44% respectively.

The invention discloses a squeeze bridge plug indoor experiment device, evaluation system and experiment method.The squeeze bridge plug indoor experiment device comprises a pressurization assembly, a heating assembly and a sleeve tool, the downhole high-temperature and high-pressure and polluting liquid environment can be simulated, the squeeze bridge plug performance can be accurately evaluated, and a downhole tool experiment evaluation system simulates actual working conditions through a setting tool, an experiment sleeve and the like; the performance of the bridge plug can be comprehensively evaluated, the experimental method comprises a plurality of steps such as a setting hanging checking test and releasing operation, the heating rate and pressure are strictly controlled in the heating process, and experimental safety is ensured; by means of the method, sealing failure parts can be accurately checked, powerful support is provided for bridge plug structure optimization, the reliability and safety of the bridge plug in oil and gas well exploitation are improved, and the method has great significance in promoting oil and gas well exploitation technology development.

The present application relates to the technical field of oil and gas field development reservoir reconstruction, and discloses a kind of thick multi-thin reservoir reconstruction interlayer steering simulation experiment device and method, comprising the following steps: step S1: based on the principle of similarity to establish the indoor experiment device of layered reconstruction interlayer steering;Step S2: at least two longitudinal processing intervals are divided, the number of perforations, perforation diameter and perforation position are set, and the perforation diameter after the diameter expansion of each perforation in the construction process is theoretically calculated;At least based on the parameter setting of preflush, sand-carrying fluid and wellbore steel grade, the diameter of temporary plugging ball is set;Step S3: according to the similarity principle, the sand injection amount of each longitudinal processing interval in the experimental process is set, the pump injection simulation program in the indoor experiment device is carried out to carry out sand injection reconstruction by pumping fracturing fluid, and the interlayer steering simulation experiment is completed.The thick multi-thin reservoir reconstruction interlayer steering simulation experiment device and method of the present application improve the longitudinal reconstruction effect of thick multi-thin reservoir and the degree of reserves production, and improve the single well production.

The application provides an experimental device and method for multi-crack stress distribution visualization. The experimental device comprises a photoelastic experimental mechanism, a three-way stress loading mechanism, a horizontal stress clamping mechanism and a crack body internal pressure maintaining mechanism. The horizontal stress clamping mechanism adopts four numerical control hydraulic clamping components which are uniformly distributed around the experimental specimen to maintain stress loading of the experimental specimen in two mutually perpendicular horizontal directions. The crack body internal pressure maintaining mechanism can maintain the internal pressure in the cracks of the experimental specimen. The experimental method adopts the experimental device for multi-crack stress distribution visualization to carry out experiments. The beneficial effects of the application include: the stress distribution and stress interference of multiple cracks under the conditions of triaxial stress and internal pressure in the cracks can be realized in indoor experimental research.

The application provides a method and device for determining the operation time of expanding a borehole while drilling based on the creep law of a salt-gypsum layer, and relates to the technical field of oil and gas drilling. The method comprises the following steps: recording salt-gypsum layer creep data through a salt-gypsum layer creep test experiment; drawing a creep displacement versus creep time graph according to the salt-gypsum layer creep data; obtaining drilling log data, and determining the creep section depth, drilling fluid density and creep section deformation according to the drilling log data; determining the operation time of expanding a borehole while drilling according to the creep section depth, drilling fluid density, creep section deformation and creep displacement versus creep time graph. The application comprehensively uses laboratory experiments and field data analysis, improves the operation effect of expanding a borehole while drilling in a salt-gypsum layer, reduces the accident complexity of the salt-gypsum layer section, shortens the construction period of the salt-gypsum layer section, and saves the drilling cost.