11 results about "Chamber experiment" patented technology

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 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 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.

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 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.

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.