Experimental device for evaluating liquid carrying performance of foam scrubbing agent and gas passing base

Abstract

The utility model belongs to the field of foam scrubbing agent liquid carrying performance experiment devices, and particularly relates to an experiment device for evaluating the liquid carrying performance of a foam scrubbing agent and a gas passing base. The experimental device comprises a foaming pipe, a gas passing structure is arranged at the bottom of the foaming pipe, the gas passing structure comprises a gas inlet used for being connected with an experimental gas source, a gas-liquid diffusion cavity connected with the gas inlet and a gas outlet connected with the gas-liquid diffusion cavity, and the section size of the gas outlet is larger than that of the gas inlet. And a gas refining device is arranged at the gas outlet. Experimental gas enters the gas passing structure from the gas inlet, is firstly diffused and mixed with the accumulated liquid in the gas-liquid diffusion cavity to enlarge the gas flow disturbance area, and then flows out from the gas outlet with the enlarged size and the gas refining device, so that the bubble generation effect can be remarkably improved, and the process that the gas flow passes through the accumulated liquid to generate a large number of dense bubbles from bottom to top and gradually rises is well simulated; therefore, the accuracy of medicament test data is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the bubble displacement agent liquid carrying performance experimental device field, concretely relates to a kind of experimental device and air passing base for bubble displacement agent liquid carrying performance evaluation. BACKGROUND

[0002] Bubble displacement agent mainly reduces the surface tension of accumulated fluid in gas well, and efficiently discharges accumulated fluid to reduce wellbore back pressure and improve single well production. Liquid carrying rate is an important indicator for evaluating the effect of bubble displacement agent. The experimental device for completing bubble displacement agent liquid carrying performance in the laboratory mainly includes a Ross foam instrument, an air pump, a measuring cup and the like. In the experimental process, the air pump is used to simulate formation gas production, the Ross foam instrument is used to simulate wellbore, and the bubble displacement agent and formation water mixed liquid poured into the Ross foam instrument are used to simulate wellbore accumulated fluid. After starting the experiment, gas is introduced into the accumulated fluid, and the accumulated fluid forms foam under the disturbance of the gas flow, which enters the measuring cup through the elbow pipe. The liquid carrying capacity is measured to evaluate the liquid carrying performance of the bubble displacement agent.

[0003] A Chinese invention patent application with application publication date of December 20, 2024 and application publication number CN119165111A discloses a bubble displacement agent performance detection device and method. The bubble displacement agent performance detection device includes a foam generator (i.e., a foaming pipe). The foam generator is connected with a nitrogen cylinder through a first metal pipe and a first high-pressure hose, and is connected with a liquid storage container through the first metal pipe and a second high-pressure hose. Since the gas is directly introduced into the foam generator through the first metal pipe, the generated gas bubbles are relatively large, which does not conform to the actual liquid carrying condition of the gas well.

[0004] A Chinese utility model patent with authorization announcement date of July 13, 2021 and authorization announcement number CN213689272U discloses a bubble displacement agent performance evaluation device. A sand core plate (which can be regarded as a gas refiner) for dispersing gas is further arranged at the bottom of the foaming pipe. In this way, the introduced gas is refined through the sand core plate, which can make the generated gas bubbles more delicate and increase the amount of gas bubbles. However, the disturbance effect of the gas refined through the sand core plate on the accumulated fluid is still not ideal, which cannot simulate the actual situation that the gas flow forms a large number of dense gas bubbles through the accumulated fluid section, resulting in distorted test data and failing to reflect the real performance of the agent. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide an experimental device for bubble displacement agent liquid carrying performance evaluation, so as to solve the problem that the existing bubble displacement agent liquid carrying performance evaluation experimental device cannot simulate the actual situation that the gas flow passes through the accumulated fluid section, and the test result cannot reflect the real performance of the agent.

[0006] The second object of the utility model is to provide an air passing base, so as to solve the problem that a large number of dense gas bubbles cannot be generated during the bubble displacement agent liquid carrying performance evaluation.

[0007] To achieve the first purpose, the utility model adopts the technical scheme of:

[0008] An experimental device for foam displacement agent liquid carrying performance evaluation, including foaming pipe, the bottom of foaming pipe is provided with air passing structure, the air passing structure includes air inlet for being connected with experimental gas source, gas-liquid diffusion cavity connected with air inlet and air outlet connected with gas-liquid diffusion cavity, the cross-sectional dimension of air outlet is greater than air inlet, and gas refiner is arranged at air outlet.

[0009] The utility model belongs to improved generation, and experimental gas enters air passing structure from air inlet, is mixed with fluid diffusion in gas-liquid diffusion cavity first, increases the airflow disturbance area, then flows from the air outlet of size expansion and gas refiner, can improve bubble generation effect significantly, simulates the process that a large number of dense bubbles are generated from bottom to top and gradually rise when airflow passes through fluid, thereby improves the accuracy of medicament test data.

[0010] Preferably, the air outlet is also connected with a drainage tube located outside the gas refiner, and the outlet of the drainage tube is smaller than the air outlet.

[0011] Further preferably, the lower end of the drainage tube is in contact with the gas refiner, and the upper end extends out of the air outlet.

[0012] Preferably, the gas refiner includes a screen mesh arranged in the air outlet.

[0013] Preferably, the air outlet and the air inlet are staggered on the same side of the gas-liquid diffusion cavity.

[0014] Further preferably, the gas-liquid diffusion cavity is a cylindrical cavity, and the size of the end face of the cylindrical cavity is consistent with the size of the air outlet.

[0015] Preferably, the air passing structure is arranged on an air passing base, and the air passing base is placed at the bottom of the foaming pipe.

[0016] To achieve the second purpose, the utility model adopts the technical scheme of:

[0017] An air passing base, including air passing structure, the air passing structure includes air inlet for being connected with experimental gas source, gas-liquid diffusion cavity connected with air inlet and air outlet connected with gas-liquid diffusion cavity, the cross-sectional dimension of air outlet is greater than air inlet, and gas refiner is arranged at air outlet.

[0018] The air passing base provided by the utility model can strengthen the mixing of gas and fluid through the gas-liquid diffusion cavity, and then flow out from the air outlet provided with the gas refiner, which can generate a large number of dense bubbles, thereby being better applied in foam displacement agent liquid carrying performance evaluation.

[0019] Preferably, a guide tube located outside the gas refiner is also connected to the gas outlet, and the outlet of the guide tube is smaller than the gas outlet.

[0020] More preferably, the lower end of the drainage tube contacts the gas atomizer, and the upper end extends out of the gas outlet. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the experimental apparatus according to Embodiment 1 of this utility model;

[0022] Figure 2 for Figure 1 Top view of the middle air-filled base;

[0023] Figure 3 for Figure 2 A cross-sectional view;

[0024] Among them, 1-foaming tube; 2-air-passing base; 3-air pump; 4-measuring cup; 5-jacket; 6-circulating water inlet; 7-circulating water outlet; 8-water bath; 9-base body; 10-gas-liquid diffusion chamber; 11-screen; 12-air outlet; 13-air inlet; 14-drainage tube; 15-rubber stopper; 16-first air-passing pipeline; 17-second air-passing pipeline. Detailed Implementation

[0025] The technical concept of this invention is to set up a gas-liquid diffusion chamber between the air inlet and the air outlet with a gas refiner, thereby increasing the airflow disturbance area and allowing the gas to flow out from the gas refiner, thus generating a larger quantity and number of bubbles. Furthermore, by further setting up the diversion pipe structure, the outlet size is further reduced, which can generate even denser bubbles, thereby better simulating the actual bubble generation situation at the bottom of the well.

[0026] In addition, by optimizing the position and arrangement of the air inlet and outlet, better flow stabilization and buffering effects can be achieved, which is beneficial for the stable and uniform production of a large number of dense bubbles.

[0027] The implementation process of this utility model will be described in detail below with reference to specific embodiments.

[0028] I. Specific Embodiments of the Experimental Apparatus for Evaluating the Liquid-Carrying Performance of Foaming Agents of this Utility Model

[0029] Example 1

[0030] The experimental apparatus used in this embodiment for evaluating the liquid-carrying performance of the foaming agent, such as... Figure 1 As shown, it includes a foaming tube 1, an air-passing base 2, an air pump 3, and a measuring cup 4.

[0031] The foaming pipe 1 is a foaming container for simulating the wellbore structure. It is generally a tubular structure with a certain height, and is provided with a sandwich layer, and a heat source with a certain temperature is introduced into the sandwich layer to simulate the formation temperature. Specifically, the foaming pipe 1 is a long tubular structure, and a liquid discharge valve is arranged at the bottom. The foaming pipe 1 is provided with a sandwich layer 5, and a circulating water inlet 6 and a circulating water outlet 7 are arranged on the sandwich layer 5, and the circulating water inlet 6 and the circulating water outlet 7 are connected to a water bath 8 through pipelines to introduce circulating water into the sandwich layer 5 and control the experimental temperature within a set temperature range. In actual experiments, the foaming pipe 1 can be directly used as a Rose foaming pipe.

[0032] The gas passing base 2 is connected to the experimental gas source and placed on the bottom surface of the foaming pipe 1, and a large number of dense bubbles are generated after the gas flow to simulate the gas well liquid carrying process. As shown in Figure 2 and Figure 3 , the gas passing base 2 includes a base body 9 which is a whole cylinder, and a gas outlet groove is formed in the central part of the base body 9, and a gas inlet groove is formed on one side of the gas outlet groove, and the groove bottom surfaces of the gas outlet groove and the gas inlet groove are flush and are connected through a communication channel. The gas outlet groove and the gas inlet groove are both cylindrical, and the diameter of the gas outlet groove is much larger than that of the gas inlet groove, and the diameter of the gas inlet groove is matched with the diameter of the gas passing pipeline. The communication channel is a circular channel with a diameter slightly smaller than that of the gas inlet groove, and the bottom surface of the circular channel is flush with the groove bottom surfaces of the gas outlet groove and the gas inlet groove.

[0033] A gas refiner is arranged near the slot of the gas outlet groove, and a cavity between the gas refiner and the groove bottom surface forms a gas-liquid diffusion chamber 10. Here, the gas refiner is specifically a screen 11 (with a mesh size of 12-14 meshes), which can be fixed on the gas outlet groove by welding or other methods. The screen 11 has small resistance to gas flow and can produce good gas refining effect. The upper opening of the gas outlet groove forms a gas outlet 12, and the upper opening of the gas inlet groove forms a gas inlet 13.

[0034] Further, as shown in Figure 3 , a drainage pipe 14 is also embedded in the slot of the gas outlet groove. The drainage pipe 14 is a circular short pipe, the lower end of the drainage pipe 14 is in contact with the screen 11, and the upper end of the drainage pipe 14 extends out of the gas outlet groove. The diameter of the drainage pipe 14 is further constricted relative to the diameter of the gas outlet 12, which plays a role in accelerating and guiding the flow, and can promote the formation of more dense bubbles, and the simulation effect of the gas well liquid carrying process is better. The drainage pipe 14 can be connected to the base body by screw connection, welding or other conventional methods.

[0035] The air inlet 13 is connected with the air pump 3 through the air passing pipeline, and correspondingly, the upper opening of the foaming pipe 1 is sealed by the rubber plug 15, and the rubber plug 15 is provided with a hole for the air passing pipeline to pass through. Specifically, in order to facilitate the connection between the components, the air inlet 13 is connected to the air pump 3 through the first air passing pipeline 16 and the second air passing pipeline 17, the end of the first air passing pipeline 16 away from the air inlet 13 is a female buckle joint, the end of the second air passing pipeline 17 away from the air pump 3 is a male buckle joint, and the female buckle joint of the first air passing pipeline 16 is connected with the male buckle end of the second air passing pipeline 17.

[0036] The rubber plug 15 is also provided with a hole for the elbow to pass through, and the outlet of the elbow is connected with the measuring cup 4.

[0037] The process of testing the liquid carrying performance of the foam displacement agent by the experimental device is as follows: according to the Figure 1 After the connecting device, the circulating water is introduced into the interlayer 5 of the foaming pipe 1 to adjust the experimental temperature to the formation temperature, the mixed solution of the foam displacement agent and the formation water is added into the foaming pipe 1. Start the air pump 3, the airflow enters the air inlet 13 of the air passing base 2 through the air passing pipeline, diffuses and mixes with the mixed solution in the gas-liquid diffusion cavity 10, disturbs the mixed solution to form foam, the foam carries the liquid through the metal screen 11 and the mixed liquid above the metal screen 11 into the elbow, and finally reaches the measuring cup 4 through the elbow to realize the test of the liquid carrying performance of the foam displacement agent.

[0038] Example 2

[0039] The experimental device for evaluating the liquid carrying performance of the foam displacement agent of the embodiment comprises a foaming pipe, an air pump and a measuring cup, and is different from the embodiment 1 in that the bottom wall of the foaming pipe is taken as the base body instead of separately arranging the air passing base, the air outlet groove, the air inlet groove and the communication channel communicating the air outlet groove and the air inlet groove are correspondingly processed on the base body, then the filter screen and the drainage pipe structure are arranged at the slot opening of the air outlet groove, and the arrangement of the above structures is the same as that of the embodiment 1, and the liquid carrying performance evaluation of the foam displacement agent can be realized according to the same principle as the embodiment 1.

[0040] Second, a specific embodiment of the air passing base of the utility model

[0041] Example 3

[0042] The air passing base of the embodiment has the same structure as the embodiment 1 and comprises a base body in the shape of a whole cylinder, the center part of the base body is provided with an air outlet groove, one side of the air outlet groove is provided with an air inlet groove, and the groove bottom surfaces of the air outlet groove and the air inlet groove are flush and communicated through a communication channel. The air outlet groove and the air inlet groove are both in the shape of a cylinder, the diameter of the air outlet groove is much larger than that of the air inlet groove, and the diameter of the air inlet groove is matched with the diameter of the air passing pipeline. The communication channel is a circular channel with a diameter slightly smaller than that of the air inlet groove, and the bottom surface of the circular channel is flush with the groove bottom surfaces of the air outlet groove and the air inlet groove.

[0043] The filter screen is in contact with the sieve screen, and the upper end of the filter screen extends out of the air outlet groove.

[0044] The air outlet groove is further embedded with a drainage pipe at the slot, the drainage pipe is a circular short pipe, the lower end of the drainage pipe is in contact with the sieve screen, and the upper end of the drainage pipe extends out of the air outlet groove.

[0045] In other implementation cases, the air inlet groove can be opened from bottom to top, at this time, the air inlet and the air outlet are located on both sides of the gas-liquid diffusion cavity, that is, Figure 3 The air inlet is arranged downward, at this time, an air passing channel can be opened on the bottom wall of the foaming pipe to realize air passing to the air passing base. In addition, when the air inlet is arranged downward, the air inlet can also be arranged at the central part of the base body, the air inlet and the air outlet are located on the same axis, the size of the air inlet is smaller than that of the air outlet, at this time, the bubble generating effect is basically equivalent.

[0046] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and not for limiting the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it still can modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application, should be included in the protection scope of the present application.

Claims

1. An experimental apparatus for evaluating the liquid-carrying performance of foaming agents, comprising a foaming tube, characterized in that, The bottom of the foaming tube is provided with an air passage structure, which includes an air inlet for connecting to an experimental gas source, a gas-liquid diffusion chamber connected to the air inlet, and an air outlet connected to the gas-liquid diffusion chamber. The cross-sectional dimension of the air outlet is larger than that of the air inlet, and a gas refiner is provided at the air outlet.

2. The experimental apparatus for evaluating the liquid-carrying performance of foaming agents as described in claim 1, characterized in that, The outlet is also connected to a guide tube located outside the gas refiner, and the outlet of the guide tube is smaller than the outlet.

3. The experimental apparatus for evaluating the liquid-carrying performance of foaming agents as described in claim 2, characterized in that, The lower end of the drainage tube contacts the gas refiner, and the upper end extends out of the gas outlet.

4. The experimental apparatus for evaluating the liquid-carrying performance of foaming agents as described in any one of claims 1 to 3, characterized in that, The gas refiner includes a screen disposed within the gas outlet.

5. The experimental apparatus for evaluating the liquid-carrying performance of foaming agents as described in claim 1, characterized in that, The air outlet and air inlet are staggered on the same side of the gas-liquid diffusion chamber.

6. The experimental apparatus for evaluating the liquid-carrying performance of foaming agents as described in claim 5, characterized in that, The gas-liquid diffusion cavity is a cylindrical cavity, and the gas outlet has the same dimensions as the end face of the cylindrical cavity.

7. The experimental apparatus for evaluating the liquid-carrying performance of foaming agents as described in claim 1, 2, or 5, characterized in that, The air-passing structure is mounted on the air-passing base, which is placed at the bottom of the foaming tube.

8. A type of air-proof base, characterized in that, The device includes a gas passage structure, which includes an air inlet for connecting to an experimental gas source, a gas-liquid diffusion chamber connected to the air inlet, and an air outlet connected to the gas-liquid diffusion chamber. The cross-sectional dimension of the air outlet is larger than that of the air inlet, and a gas refiner is provided at the air outlet.

9. The air-permeable base as described in claim 8, characterized in that, The outlet is also connected to a guide tube located outside the gas refiner, and the outlet of the guide tube is smaller than the outlet.

10. The air-permeable base as described in claim 9, characterized in that, The lower end of the drainage tube contacts the gas refiner, and the upper end extends out of the gas outlet.

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