CN114764095A - Foam scrubbing agent performance evaluation device - Google Patents
Foam scrubbing agent performance evaluation device Download PDFInfo
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- CN114764095A CN114764095A CN202110049677.4A CN202110049677A CN114764095A CN 114764095 A CN114764095 A CN 114764095A CN 202110049677 A CN202110049677 A CN 202110049677A CN 114764095 A CN114764095 A CN 114764095A
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Abstract
The invention relates to a foam scrubbing agent performance evaluation device. The device comprises a test shaft, wherein the test shaft is provided with a liquid inlet, a gas increasing port and a discharge port, the gas inlet and the gas increasing port are arranged at the lower part of the test shaft, the gas increasing port is positioned above the gas inlet, the discharge port is arranged at the upper end of the test shaft and is connected with a back pressure valve, the device also comprises a heating device, high-pressure gas can be filled into the test shaft through the gas inlet and/or the gas increasing port in the foam discharging agent performance evaluation process, the high-pressure and up-down pressure difference at the lower part of the test shaft is ensured by adjusting the back pressure valve, the temperature of the test shaft is ensured through the heating device, so that the actual high-temperature and high-pressure state under the well is simulated, the gas-liquid ratio at the lower part of the test shaft is increased through the gas increasing port in the foaming process, the state that the gas-liquid ratio of two phases passes through a throttling hole is obviously simulated, and the foam discharging agent performance evaluation device better simulates the actual working environment of the well shaft, and the evaluation on the performance of the foam scrubbing agent is accurately realized.
Description
Technical Field
The invention relates to a foam scrubbing agent performance evaluation device.
Background
Foam technology has wide application in natural gas production, and foam generation is based on the properties of foam-discharging agents. In order to improve the natural gas exploitation efficiency, the underground actual working condition needs to be simulated, and the performance of the foam scrubbing agent needs to be evaluated so as to select the foam scrubbing agent with better performance.
In the prior art, the performance evaluation of the foam scrubbing agent is mostly carried out under the conditions of constant-temperature water bath and normal pressure, the actual underground high-temperature and high-pressure working condition cannot be simulated, and the up-down pressure difference condition in an actual shaft cannot be simulated, so that the performance evaluation of the foam scrubbing agent cannot be accurately realized through an evaluation device in the prior art.
Disclosure of Invention
The invention aims to provide a foam scrubbing agent performance evaluation device to solve the problem that the evaluation device in the prior art cannot accurately evaluate the performance of a foam scrubbing agent.
The foam scrubbing agent performance evaluation device adopts the following technical scheme:
a foam scrubbing agent performance evaluation device comprises:
testing a shaft;
the liquid inlet is arranged on the test shaft and is used for connecting a liquid inlet pipeline so as to introduce liquid to be tested into the test shaft;
the air inlet is arranged at the lower part of the test shaft and is used for being connected with an air inlet pipeline;
the gas increasing port is arranged at the lower part of the test shaft, is positioned above the gas inlet and is used for connecting a gas increasing pipeline;
the discharge port is arranged at the upper end of the test shaft and is connected with a back pressure valve;
and the heating device is used for heating the whole test shaft.
The invention has the beneficial effects that: in the foam scrubbing agent performance evaluation device, an air increasing port and an air inlet are arranged on a test shaft, so that the gas is introduced into the test shaft before the liquid to be tested foams to increase the pressure in the test shaft, under the combined action of the gas increasing pipeline, the back pressure valve and the heating device, the requirement that the upper pressure of the test shaft is less than the lower pressure of the test shaft is met, thereby simulating the actual high-temperature and high-pressure state and the upper and lower pressure difference state under the well, increasing the gas-liquid ratio in the gas-liquid two-phase mixture through the gas increasing port in the foaming process of the liquid to be detected, thereby being capable of obviously simulating the rising state of gas-liquid ratio in the rising process of gas-liquid two phases, leading the foam scrubbing agent performance evaluation device of the invention to better simulate the real working environment of the underground shaft, the foam scrubbing agent performance evaluation device can be used for observing the foaming condition in the foam scrubbing agent test process, and accurately realizing the evaluation of the underground foam scrubbing agent performance.
Furthermore, an air distribution structure is arranged in the test shaft at the position of the air increasing port, an ascending path through which the two-phase mixture of the air supply liquid passes is formed between the air distribution structure and the wall of the test shaft, and an air distribution hole for ventilating the test shaft is also formed in the air distribution structure and is communicated with the air increasing port.
The beneficial effects are as follows: the gas distribution structure can not influence the rising process of gas-liquid phases in the test shaft, and can also be convenient for supplying gas to the gas-liquid two-phase mixture in the gas-liquid two-phase rising process so as to increase the gas-liquid ratio of the middle lower part of the test shaft.
Furthermore, the air distribution structure comprises junction pipes arranged in a structure shaped like a Chinese character 'mi', and each junction pipe is provided with the air distribution hole.
The beneficial effects are as follows: the gas distribution structure can ensure that the ascending path through which the gas-liquid two-phase mixture passes is uniformly distributed on the axial section of the test shaft, and is beneficial to the ascending of the gas-liquid two-phase mixture after foaming at the lower part of the test shaft; each junction pipe is provided with an air distribution hole, which is beneficial to uniformly increasing the gas content in the gas-liquid two-phase mixture on the axial section of the test shaft.
Furthermore, an orifice is arranged in the test shaft, the test shaft comprises a lower shaft section below the orifice and an upper shaft section above the orifice, the air inlet and the air increasing port are both arranged on the lower shaft section, and the discharge port is arranged on the upper shaft section.
The beneficial effects are as follows: the structure that the throttle hole is arranged in the test shaft can ensure that the pressure of the lower well barrel section below the throttle hole is higher than that of the upper well barrel section, gas is introduced into the lower well barrel section through the gas increasing port in the foaming process of the liquid to be tested, and the gas-liquid ratio below the throttle hole in the foaming process of the liquid to be tested can be increased, so that the rising state of the gas-liquid ratio of the gas-liquid two phases passing through the throttle hole can be obviously simulated, the real working environment of the underground throttle gas well can be well simulated, and the evaluation of the foam displacement agent performance in the throttling state can be accurately realized.
Furthermore, pressure detection devices are mounted at positions, close to the throttling hole, on the upper well cylinder section and the lower well cylinder section.
The beneficial effects are as follows: the above-described structural arrangement facilitates observation and comparison of pressure differentials and pressure changes in the upper and lower wellbore sections during inflation into the test wellbore.
Further, the foam scrubbing agent performance evaluation device also comprises a throttling device which is hermetically arranged between the upper well barrel section and the lower well barrel section, and an overflowing hole on the throttling device forms the throttling hole.
The beneficial effects are as follows: the structure is convenient for the disassembly and assembly of the whole test shaft, and the change of the throttle is convenient to realize the change of different throttle bore diameters.
Further, the discharge port is connected with a liquid storage container through a discharge pipeline.
The beneficial effects are as follows: the reservoir is used to receive and store fluid expelled from the test well bore to facilitate evaluation of the fluid carrying properties of the foam displacement agent.
Further, the discharge pipeline is provided with an inlet and an outlet, the inlet is communicated with the test wellbore through the discharge port, the outlet is communicated with the liquid storage container, and the caliber of the outlet is smaller than that of the inlet.
The beneficial effects are as follows: among the above-mentioned structural configuration, the bore of export is less than the bore that is less than the import to the export that makes less bore has the defoaming effect, can avoid adding the defoaming agent to in the stock solution container, helps the measurement to the volume of storage liquid in the stock solution container.
Furthermore, visual windows are uniformly distributed in the vertical direction on the test shaft.
The beneficial effects are as follows: the foaming condition in the test shaft can be conveniently observed through the visual window.
Further, the heating device is a heating sleeve sleeved on the whole test well barrel section.
The beneficial effects are as follows: the heating jacket is convenient to assemble, and the heating jacket is directly contacted with the wall of the shaft so as to heat the test shaft.
Drawings
FIG. 1 is a simplified schematic diagram of a state of use structure of a foam discharging agent performance evaluation device of the present invention in a specific example 1;
FIG. 2 is a schematic top view of a gas distribution structure in embodiment 1 of the foam discharging agent performance evaluation apparatus according to the present invention;
description of reference numerals:
1. a lower wellbore section; 2. an upper wellbore section; 3. a reservoir; 4. a solution to be tested; 5. a gas source; 6. a restrictor; 61. an overflowing hole; 7. a gas distribution structure; 71. distributing air holes; 711. an intersection pipe; 8. a sand core plate; 9. heating a jacket; 10. a visible window; 11. a discharge line; 12. an air intake line; 13. a gas increasing pipeline; 14. an intake valve; 15. a gas-increasing valve; 16. an intake air flow meter; 17. a gas increasing flow meter; 18. a back pressure valve; 19. a liquid outlet valve; 20. a liquid inlet valve; 21. a liquid inlet pipeline.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The features and properties of the present invention are described in further detail below with reference to examples.
Specific example 1 of the foam scrubbing agent performance evaluation apparatus of the present invention:
the foam scrubbing agent performance evaluation device in the embodiment of the invention is applied to the throttling gas well to simulate the actual working conditions of the shaft of the throttling gas well and realize the evaluation of the foaming performance and the liquid carrying performance of the foam scrubbing agent.
Specifically, as shown in fig. 1, the foam scrubbing agent performance evaluation device comprises a test shaft, the test shaft comprises a lower shaft section 1 and an upper shaft section 2, the upper shaft section 2 is connected with the lower shaft section 1 through a throttle 6, an upper joint and a lower joint are arranged on the throttle 6, the upper joint of the throttle 6 is in threaded connection with the upper shaft section 2, the lower joint of the throttle 6 is in threaded connection with the lower shaft section 1, an overflowing hole 61 is arranged at the axial position of the test shaft on the throttle 6, and the overflowing hole 61 is communicated with the lower shaft section 1 and the upper shaft section 2 to form a throttling hole in the test shaft. The structure of the test shaft is convenient for the disassembly and assembly of the whole test shaft, and can meet the requirement of replacing the throttler 6 with different throttle apertures, so that the foam discharging agent performance evaluation device can simulate the well conditions with different throttle apertures.
In this embodiment, as shown in fig. 1, visual windows 10 are uniformly distributed on the lower wellbore section 1 and the upper wellbore section 2, so as to observe the foaming condition of the liquid to be measured in the test wellbore through the visual windows 10.
As shown in fig. 1, a liquid inlet is provided at a position below and on the sidewall of the lower wellbore section 1, and in other embodiments, the liquid inlet may also be provided on the sidewall of the upper wellbore section. In this embodiment, the liquid inlet is communicated with the liquid 4 to be measured through a liquid inlet pipeline 21, and a liquid inlet valve 20 is connected in series to the liquid inlet pipeline 21 to control the amount of the liquid to be measured added to the lower wellbore section 1. The lower extreme of lower part well section of thick bamboo 1 still is equipped with the air inlet, the air inlet passes through air inlet pipeline 12 and air supply 5 intercommunication, concretely, the bottom of lower part well section of thick bamboo 1 is provided with threaded connecting hole, connecting hole position department is connected with sand core board 8, sand core board 8 is cylindrical, be equipped with the screw thread on its periphery, sand core board 8 passes through threaded connection with the connecting hole of lower part well section of thick bamboo 1, sand core board 8 axial tip has the connector, this connector and the end connection of air inlet pipeline 12 are in order to form the air inlet on lower part well section of thick bamboo 1, gas passes through the air inlet along air inlet pipeline 12, and through the even entering lower part well section of thick bamboo 1 of aperture on the sand core board 8 cross-section, in order to mix with the liquid that awaits measuring in lower part well section of thick bamboo 1, form gas-liquid two-phase mixture, and rise along with the bubble.
In the embodiment, in the actual production process, when the natural gas enters the shaft from the stratum, the natural gas is in a dispersed state overflowing from the fine pore throat, and the sand core plate 8 can better simulate the state that the natural gas enters the shaft from the stratum, so that the gas can overflow to the lower shaft section 1 in a uniform and fine airflow state and enter the liquid to be measured in the lower shaft section 1.
In this embodiment, as shown in fig. 1, an intake valve 14 and an intake flowmeter 16 are connected in series to the intake pipe 12, the intake valve 14 is used for controlling the amount of gas entering the lower wellbore section 1, and the intake flowmeter 16 is used for controlling the speed of gas entering the lower wellbore section 1.
In this embodiment, as shown in fig. 1, an air charging port is provided on the side wall of the lower wellbore section 1 and at a position close to the throttle hole, and the air charging port is communicated with the air source 5 through an air charging pipeline 13. As shown in fig. 2, an air distribution structure 71 is installed inside the lower wellbore section 1 at the position of the air-increasing port, the air distribution structure 71 includes four junction pipes 711 arranged in a structure like a Chinese character 'mi', an ascending path through which the two-phase air-liquid mixture passes is formed between two adjacent junction pipes 711 and the wellbore wall of the test wellbore, and the arrangement of the air distribution structure can enable the ascending path to be uniformly arranged on the axial cross section of the lower wellbore section 1, which is beneficial to enabling the two-phase air-liquid mixture foamed in the lower wellbore section to ascend in the lower wellbore section. The gas distribution holes 71 are uniformly arranged on the junction pipes, the gas distribution holes 71 are communicated with the gas increasing ports, gas can be introduced into the lower well cylinder section 1 through the gas distribution holes 71 to increase the pressure in the whole test well shaft, the gas content in a gas-liquid two-phase is increased in the foaming process of the liquid 4 to be detected in the lower well cylinder section 1, and the gas-liquid ratio in the lower well cylinder section 1 is increased. In this embodiment, the gas distribution holes 71 are opened upward, which contributes to uniformly increasing the gas content in the gas-liquid two-phase on the cross section of the lower wellbore section 1, and does not affect the rising speed of the gas-liquid two-phase mixture while increasing the gas content in the lower wellbore section 1.
Specifically, as shown in fig. 1, the gas distribution structure 7 is pushed into the lower wellbore section 1 from the upper end of the lower wellbore section 1, so that the gas inlet of the gas distribution structure 7 is correspondingly and hermetically inserted into the gas increasing port of the lower wellbore section 1, and the end of each intersection pipe 711 is in press fit with the wellbore wall of the lower wellbore section 1, thereby realizing the positioning and installation of the gas distribution structure in the lower wellbore section 1. In this embodiment, when the liquid is fed into the lower wellbore section 1 through the liquid inlet pipeline 21, the liquid level of the liquid to be measured is lower than the upper end surface of the gas distribution structure 7, that is, lower than the gas distribution holes 71, so that after the liquid to be measured enters the lower wellbore section 1, the gas is filled into the lower wellbore section 1 through the gas increasing pipeline 13 to increase the pressure in the test wellbore.
In this embodiment, as shown in fig. 1, a gas increasing valve 15 and a gas increasing flow meter 17 are connected in series to the gas increasing pipeline 13 located outside the lower wellbore section 1, the gas increasing valve 15 is used for controlling the amount of gas entering the lower wellbore section 1, and the gas increasing flow meter 17 is used for controlling the speed of gas entering the lower wellbore section 1.
In this embodiment, as shown in fig. 1, the foam discharging agent performance evaluation device further includes a heating device, and the heating device is a heating jacket 9 sleeved outside the lower wellbore section 1 and the upper wellbore section 2, so as to heat the test wellbore and increase the temperature in the test wellbore. In other embodiments, a high-temperature oven may be used, and the test wellbore may be placed in the high-temperature oven to heat the test wellbore through the high-temperature oven.
In this embodiment, as shown in fig. 1, a temperature detection device and a pressure detection device are respectively installed on the lower wellbore section 1 and the upper wellbore section 2 and near the orifice, the temperature detection device is a temperature sensor, the pressure detection device is a pressure sensor, the temperature and the pressure in the lower wellbore section 1 and the upper wellbore section 2 are respectively monitored by the corresponding temperature sensor and the corresponding pressure sensor, and the pressure difference between the upper wellbore section and the lower wellbore section can be compared in the process of testing wellbore pressurization, which is helpful to ensure that the pressure and the temperature in the test process are closer to the underground real environment.
In this embodiment, as shown in fig. 1, the upper end of upper portion well section of thick bamboo 2 is provided with the discharge port, the discharge port is connected with stock solution container 3 and backpressure valve 18 through discharge pipe 11, discharge pipe 11 has import and export, the import passes through discharge port and upper portion well section of thick bamboo 1 intercommunication, export and stock solution container 3 intercommunication, the bore of export is less than the bore of import, the effect of defoaming can be played in the export of minor diameter, in order to reduce the bubble that enters into in the stock solution container 3, be convenient for to the observation and the measurement of stock solution volume in the stock solution container 3.
In this embodiment, as shown in fig. 1, the lower part of the liquid storage container 3 is connected with a liquid outlet valve 19 for discharging the liquid to be measured in the liquid storage container 3, the back pressure valve 18 is connected to the upper end of the liquid storage container 3, in the process of increasing gas and increasing pressure to the test wellbore through the gas increasing pipeline 13, the pressure in the upper wellbore section 2 of the upper part of the restrictor 6 can be adjusted by adjusting the back pressure valve 18, the internal pressure difference of the foam discharging agent performance evaluation device is stabilized, and the pressure difference is matched with the pressure sensor in the test wellbore, so that the pressure in the whole test wellbore is close to the underground real pressure environment.
Specifically, the process of evaluating the foam scrubbing agent performance by the foam scrubbing agent performance evaluating device in the embodiment includes the following steps:
1) and opening the liquid inlet valve 20, adding the liquid to be detected into the lower well cylinder section 1, and enabling the liquid to be detected to be positioned below the gas increasing hole 71 of the gas distribution structure 7.
It should be noted that the liquid to be tested in the present invention refers to a mixture of the foam scrubbing agent to be tested and the formation water.
2) And opening the gas-increasing valve 15, introducing gas into the lower wellbore section 1, simultaneously opening the heating device, heating the test wellbore through the heating sleeve 9, and adjusting the back pressure valve 18 to enable the pressure and the temperature in the test wellbore and the pressure difference between the lower wellbore section 1 and the upper wellbore section 2 to reach test conditions.
Specifically, in the step 2), the temperature in the test shaft is monitored in real time by observing the temperature sensor arranged on the test shaft until the temperature in the test shaft reaches the required test condition, the heating of the test shaft is stopped, if the temperature displayed by the temperature sensor is lower than the test requirement, the heating device is started, and the test shaft is heated by the heating sleeve 9, so that the temperature in the test shaft is kept within the required test condition range.
In other embodiments, the test wellbore can be not provided with a temperature sensor, the heating jacket is a constant-temperature heating jacket, and the heating jacket is always kept in a heating state in the whole test process so as to meet the requirement that the temperature in the test wellbore is within the required test condition range.
In the step 2), in the process of introducing gas into the lower well cylinder section 1, the pressure sensor arranged on the lower well cylinder section 1 is combined to determine whether the pressure in the lower well cylinder section 1 meets the required test condition; similarly, during the adjustment of the back pressure valve 18, the outlet pressure of the entire test wellbore is controlled by the combination of a pressure sensor mounted on the upper wellbore section 2 and a pressure sensor mounted on the lower wellbore section 1 to bring the pressure difference in the lower wellbore section 1 and the upper wellbore section 2 to the test condition.
In other embodiments, the foaming wellbore section is not provided with a pressure detection device, the opening pressure of the gas-increasing valve is the pressure met by the required foaming wellbore section, the gas-increasing valve is always kept in an opening state according to the pressure condition met by the required foaming wellbore section in the whole subsequent ventilation test process, and correspondingly, in the process of adjusting the back-pressure valve, the adjusting pressure of the back-pressure valve is compared with the opening pressure of the gas-increasing valve, so that the pressure difference between the front and the back of the throttling hole in the test wellbore can meet the test condition.
It should be noted that, in the actual working process of the underground shaft, the pressure of the shaft section above the restrictor is smaller than that of the shaft section below the restrictor, so that the gas-liquid two-phase mixture changes in flow rate and flow state due to pressure reduction when passing through the restrictor, in this embodiment, the opening and closing of the gas inlet pipeline 12, the adjustment of the back pressure valve 18 and the combination of the two pressure sensors simulate the pressure difference between the upper part and the lower part of the underground shaft restrictor 6, ensure the corresponding changes in flow rate and flow state when the gas-liquid two-phase mixture passes through the restrictor in the test process, better simulate the real working state of the underground shaft, and accurately realize the evaluation of the performance of the foam displacement agent in the throttling state.
3) And opening the air inlet valve 14 and the air increasing valve 15, introducing air into the lower shaft section 1 through the air inlet pipeline 12 and the air increasing pipeline 13, observing the front and back gas-liquid two-phase states of the overflowing hole 61 in the test shaft through the visible window 10, and observing the liquid amount in the liquid storage container 3 within a certain time.
In step 3), gas is introduced into the liquid to be measured in the lower wellbore section 1 through the gas inlet pipeline 12, so that a gas-liquid two-phase mixture is formed in the lower wellbore section 1.
Under the actual working condition in the pit, in the process of rising of a gas-liquid two-phase mixture, the liquid phase slides off, the pressure is reduced, the volume of a single bubble is increased, and the gas-liquid ratio is increased. In the foam scrubbing agent performance evaluation device of the embodiment, if the air inlet is arranged at the bottom of the lower well barrel section to fill gas into the liquid to be measured, due to the fact that the length of the test well barrel is short, the gas-liquid ratio is not obviously increased after the liquid phase slides down and the pressure is reduced in the rising process of the gas-liquid two-phase mixture, and due to the arrangement of the air increasing port, the ventilation quantity can be increased into the lower well barrel section 1 in the rising process of the gas-liquid two-phase mixture, so that the content of the gas in the upward gas-liquid two-phase is increased, the gas-liquid ratio in the gas-liquid two-phase mixture in the lower well barrel section below the throttle orifice is increased, the degree of increase of the gas-liquid ratio when the gas-liquid two-phase passes through the throttle orifice is increased, the gas-liquid ratio is obviously changed after the gas-liquid two-phase passes through the throttle orifice, the actual working state of the underground well bore is better simulated, and the evaluation test of the foam scrubbing agent performance in the throttling state is accurately realized.
In the embodiment, in the foam discharging agent evaluation test process, the gas-liquid two-phase mixture is in a columnar spraying state below the throttling hole and is in a spraying state after passing through the throttling hole, the higher the spraying height is, the finer the mist liquid is, the better the foaming performance of the foam discharging agent corresponding to the surface is, and the foaming performance of the foam discharging agent can be evaluated by observing the upper and lower foam shapes of the throttling hole in the experimental shaft.
In the step 3), a certain time is determined according to experimental experience, generally speaking, under the premise that conditions such as pressure temperature and air inlet speed in the experimental wellbore are equal, the two-phase gas-liquid mixture in the upper wellbore section is ensured to enter the liquid storage container 3 and accumulate in the liquid storage container 3 in the period, the liquid carrying performance of the foam discharging agent can be evaluated by observing the volume of the liquid accumulated in the liquid storage container 3 in the same period, and the more the accumulated liquid volume, the better the liquid carrying performance of the corresponding foam discharging agent.
In step 3), after one foam discharging agent performance evaluation test is completed, the liquid outlet valve 19 needs to be opened to empty the liquid amount in the liquid storage container 3, and then the steps 1) to 3) are repeated to realize the evaluation test on the performance of the other foam discharging agent.
In step 3), the liquid amount in the liquid storage container 3 can be emptied, the speed of gas entering the lower well casing section 1 from the gas inlet pipeline 12 and the gas increasing pipeline 13 is changed, the speed is displayed through the gas inlet flow meter 16 and the gas increasing flow meter 17, so that the performance of the same foam discharging agent under different gas inlet speed states is tested, and the optimal ventilation speed meeting the optimal performance corresponding to the liquid 4 to be tested is selected.
In other embodiments, in step 1) and step 2), the gas may be introduced into the lower wellbore section through the gas inlet pipeline or the gas increasing pipeline or both to increase the pressure in the test wellbore, and then the liquid to be measured is introduced into the lower wellbore section to combine with the pressure sensor and the back-pressure valve on the test wellbore, so that the pressure in the test wellbore and the pressure difference between the lower wellbore section 1 and the upper wellbore section 2 reach the test conditions, and in this process, the heating device is turned on to heat the test wellbore through the heating jacket, so that the temperature in the test wellbore reaches the test conditions.
In addition, in this embodiment, after determining the optimal ventilation speed for enabling each foam discharging agent to have the optimal performance, the liquid storage container 3 may be emptied, and the steps 1) to 3) may be repeated, so as to change the foam discharging agent to be tested, and compare the performance of different foam discharging agents under the condition corresponding to the optimal ventilation speed for each foam discharging agent, so as to obtain the foam discharging agent having the optimal performance.
In other embodiments, the influence of different orifice diameters on the performance of the foam scrubbing agent can be studied by changing the orifice size of the orifice on the flow restrictor 6 in the test wellbore under the conditions of the same type of foam scrubbing agent and the same ventilation speed, temperature and pressure.
Specific example 2 of the foam discharging agent performance evaluation device of the present invention:
it differs from the specific example 1 in that: the lower well cylinder section is not provided with a gas distribution structure, and only the gas increasing port of the lower well cylinder section is connected with the end part of the gas increasing pipeline, so that gas is introduced into the foaming well cylinder section through the gas increasing pipeline, the pressure in the whole test well shaft is increased, the gas content in two gas phases of gas and liquid is increased in the foaming process of the liquid to be detected in the foaming well cylinder section, and the gas-liquid ratio in the foaming well cylinder section is increased.
In other embodiments, the gas distribution structure comprises two junction pipes arranged in a cross-shaped structure.
In other embodiments, the gas distribution structure is a special-shaped structure, a rising path for passing the gas-liquid two-phase mixture is formed between the gas distribution structure and the wall of the test shaft, and the gas distribution holes are uniformly distributed on the special-shaped gas increasing mechanism and communicated with the gas increasing port.
Specific example 3 of the foam discharging agent performance evaluation device of the present invention:
it differs from the specific example 1 in that: the test shaft is of an integrated structure, the throttler is in sealing connection with the test shaft through the sealing ring, the throttler is installed in the test shaft from an opening position of one end of the test shaft, the throttler divides the test shaft into an upper shaft section above the throttler and a lower shaft section below the throttler, and the lower shaft section is not provided with a gas distribution structure.
Specific example 4 of the foam discharging agent performance evaluation device of the present invention:
it differs from the specific example 1 in that: the outlet caliber of the discharge pipeline is equal to the inlet caliber, in the structure, the liquid entering the liquid storage container through the discharge pipeline is the liquid containing air bubbles, and an interface for placing an antifoaming agent is required to be additionally arranged on the liquid storage container so as to eliminate the air bubbles in the liquid storage container and facilitate the identification of the liquid capacity in the liquid storage container.
Specific example 5 of the foam discharging agent performance evaluation device of the present invention:
it differs from the specific example 1 in that: the test shaft is a colorless transparent cylinder resistant to high temperature and high pressure, and the transparent cylinder with the structure does not need to be provided with a visible window on the shaft wall of the test shaft, and can directly observe gas-liquid two-phase states in the test shaft through the shaft wall of the observation shaft.
Specific example 6 of the foam discharging agent performance evaluation device of the present invention:
it differs from the specific example 1 in that: the liquid storage container is not arranged on the discharge pipeline, the liquid outlet of the discharge pipeline is directly communicated with the atmosphere through the liquid outlet valve, and the evaluation on the foaming performance of the foam discharging agent is only realized through the foam discharging agent performance evaluation device in the embodiment.
Specific example 7 of the foam scrubbing agent performance evaluation apparatus of the present invention:
it differs from the specific example 1 in that: the test shaft is not provided with a throttling hole, the gas increasing port is arranged at the lower part of the test shaft and is positioned above the gas inlet, the liquid inlet is arranged at the lower part of the test shaft, the discharge port is arranged at the upper end of the test shaft, the test shaft has a certain axial length so as to meet the requirement of inflating the test shaft to create a high-pressure condition, the pressure at the position of a liquid to be measured at the upper part of the test shaft and the lower part of the test shaft meets the actual underground pressure difference by adjusting the back pressure valve, and the condition that the foamed gas-liquid two-phase mixture slips along with a liquid phase in the rising process is also met, the gas-liquid ratio is obviously improved, so that the real working condition of the underground shaft can be better simulated, and the foaming condition and the liquid carrying rule are more obvious.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention, the scope of the present invention is defined by the appended claims, and all equivalent structural changes made by using the contents of the specification and the drawings of the present invention should be covered by the scope of the present invention.
Claims (10)
1. A foam scrubbing agent performance evaluation device is characterized by comprising:
testing a shaft;
the liquid inlet is arranged on the test shaft and is used for being connected with a liquid inlet pipeline (21) so as to introduce liquid (4) to be tested into the test shaft;
the air inlet is arranged at the lower part of the test shaft and is used for connecting an air inlet pipeline (12);
the gas increasing port is arranged at the lower part of the test shaft, is positioned above the gas inlet and is used for connecting a gas increasing pipeline (13);
the discharge port is arranged at the upper end of the test shaft and is connected with a back pressure valve (18);
and the heating device is used for heating the whole test shaft.
2. The foam scrubbing agent performance evaluation device according to claim 1, wherein a gas distribution structure (7) is installed inside the test shaft at the position of the gas increasing port, a rising path for passing the gas-liquid two-phase mixture is formed between the gas distribution structure (7) and the wall of the test shaft, a gas distribution hole (71) for ventilating the test shaft is further formed in the gas distribution structure (7), and the gas distribution hole (71) is communicated with the gas increasing port.
3. The foam scrubbing agent performance evaluating apparatus according to claim 2, wherein said air distribution structure (7) comprises junction pipes (711) arranged in a structure like a Chinese character mi, and each junction pipe (711) is provided with said air distribution holes (71).
4. The foam scrubbing agent performance evaluating apparatus according to any one of claims 1 to 3, wherein an orifice is provided inside the test shaft, the test shaft comprises a lower shaft section (1) below the orifice and an upper shaft section (2) above the orifice, the gas inlet and the gas inlet are both provided on the lower shaft section (1), and the discharge outlet is provided on the upper shaft section (2).
5. The foam scrubbing agent performance evaluating apparatus according to claim 4, wherein pressure detecting means are installed at positions close to the orifice on both of said upper wellbore section (2) and said lower wellbore section (1).
6. The foam discharging agent performance evaluation device according to claim 4, characterized in that the foam discharging agent performance evaluation device further comprises a restriction (6) sealingly installed between the upper wellbore section (2) and the lower wellbore section (1), the flow-through hole (61) on the restriction (6) forming the restriction.
7. The foam scrubbing agent performance evaluating apparatus according to any one of claims 1 to 3, wherein said discharge port is connected to a reservoir (3) through a discharge line (11).
8. The foam scrubbing agent evaluating apparatus according to claim 7, wherein said discharge line (11) has an inlet communicating with a test well bore through said discharge port and an outlet communicating with said reservoir (3), said outlet having a smaller bore than said inlet.
9. The foam scrubbing agent performance evaluating apparatus according to any one of claims 1 to 3, wherein said test well bore has viewing windows (10) distributed in up and down directions.
10. The foam scrubbing agent performance evaluation device of any one of claims 1 to 3, wherein said heating device is a heating jacket (9) that is sleeved over the entire test wellbore section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110049677.4A CN114764095A (en) | 2021-01-14 | 2021-01-14 | Foam scrubbing agent performance evaluation device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110049677.4A CN114764095A (en) | 2021-01-14 | 2021-01-14 | Foam scrubbing agent performance evaluation device |
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| CN114764095A true CN114764095A (en) | 2022-07-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117434209A (en) * | 2023-09-08 | 2024-01-23 | 中国石油大学(北京) | Dynamic visual testing device for high-temperature high-pressure foam performance |
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2021
- 2021-01-14 CN CN202110049677.4A patent/CN114764095A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117434209A (en) * | 2023-09-08 | 2024-01-23 | 中国石油大学(北京) | Dynamic visual testing device for high-temperature high-pressure foam performance |
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