CN114458285B - Automatic metering device for tight sandstone phase seepage experimental fluid and using method thereof - Google Patents
Automatic metering device for tight sandstone phase seepage experimental fluid and using method thereof Download PDFInfo
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- CN114458285B CN114458285B CN202110105546.3A CN202110105546A CN114458285B CN 114458285 B CN114458285 B CN 114458285B CN 202110105546 A CN202110105546 A CN 202110105546A CN 114458285 B CN114458285 B CN 114458285B
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000012530 fluid Substances 0.000 title claims abstract description 14
- 238000005086 pumping Methods 0.000 claims abstract description 7
- 230000003321 amplification Effects 0.000 claims abstract description 6
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 6
- 238000001035 drying Methods 0.000 claims description 154
- 238000007789 sealing Methods 0.000 claims description 38
- 238000005303 weighing Methods 0.000 claims description 14
- 238000002474 experimental method Methods 0.000 claims description 11
- 239000002274 desiccant Substances 0.000 claims description 10
- 238000001764 infiltration Methods 0.000 claims 1
- 230000008595 infiltration Effects 0.000 claims 1
- 239000007789 gas Substances 0.000 description 47
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 16
- 238000004519 manufacturing process Methods 0.000 description 9
- 239000012071 phase Substances 0.000 description 7
- 238000003825 pressing Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 4
- 230000035699 permeability Effects 0.000 description 3
- 239000011521 glass Substances 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
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- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Drying Of Solid Materials (AREA)
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Abstract
The invention provides an automatic metering device for a tight sandstone phase seepage experimental fluid and a use method thereof. The device senses the tiny pressure of the gas at the outlet of the core holder through the micro-pressure sensor, the metering pump is driven through signal amplification, the pressure is increased, the pump is pumped, the pressure is reduced through pumping, the pump is stopped, stable closed-loop control is formed between the micro-pressure sensor and the metering pump, high-precision metering is realized, and the metering resolution can reach 0.1ml.
Description
Technical Field
The invention relates to the technical field of oilfield fluid experiments, in particular to an automatic metering device for tight sandstone phase seepage experimental fluid and a use method thereof.
Background
The gas-water permeability curve obtained by the tight sandstone gas-water permeability experiment can quantitatively evaluate the water-producing gas well exploitation effect, so that the effective means for quantitatively evaluating the capacity and the yield of the water-producing gas well and the final accumulated gas production and recovery ratio are realized, when the tight sandstone core gas-water permeability experiment is actually developed, firstly, the metered liquid is very little, and part of the liquid is adhered to a glass tube, so that systematic errors are brought to metering, and various existing metering devices on the market are difficult to be qualified; the method of adsorbing moisture by using a drying agent and then weighing by using a balance is thought, but in the actual operation process, the fact that a balance weighing drying bottle cannot be on line, a pipeline is involved and is inaccurate in weighing, the weighing bottle can only be manually and periodically dismounted and placed on the balance, then the weighing bottle is returned to a system to continue running, repeated dismounting is carried out for multiple times, and on-line and off-line operations are carried out, so that a great amount of workload is increased intangibly, and metering errors are caused.
Disclosure of Invention
The invention overcomes the defects in the prior art, and provides an automatic metering device for a tight sandstone phase permeation experimental fluid and a use method thereof, aiming at the problems that the gas-water permeation of an unconventional hypotonic rock core and the liquid phase displacement of various gases and liquids are very small in quantity, a small amount of liquid drops which are splashed and stuck on a glass tube and even trace moisture contained in the continuous gas are not allowed, the device is added with high-precision gas metering, a high-precision micro-pressure sensor is configured, the micro-pressure sensor senses the micro-pressure of the gas at the outlet of a rock core holder, a metering pump is driven by signal amplification treatment, the pressure is increased, the air pump pumps, the pressure is reduced, the pump is stopped, and stable closed-loop control is formed between the micro-pressure sensor and the metering pump, so that the high-precision metering is realized. The metering resolution can reach 0.1ml.
The aim of the invention is achieved by the following technical scheme.
An automatic metering device for a tight sandstone phase seepage experimental fluid comprises a bottom plate, a balance, a micro-pressure sensor, a gas metering pump and a data acquisition system,
The balance is arranged on the upper surface of the bottom plate, a left stand column and a right stand column are respectively fixed on the bottom plate on two sides of the balance, the head end of the left stand column and the head end of the right stand column are connected through a cross beam, a gas metering pump is arranged on the cross beam, a pipeline fixing frame is arranged between the left stand column and the right stand column below the cross beam, the pipeline fixing frame adopts a U-shaped structure, a drying bottle inlet pipe and a drying bottle outlet pipe are arranged in the middle of the U-shaped structure of the pipeline fixing frame, a drying bottle is arranged right below the drying bottle inlet pipe, a through hole is formed in the drying bottle, the inlet end of the drying bottle inlet pipe and the inlet end of the drying bottle outlet pipe are respectively arranged opposite to the through hole, the outlet end of the drying bottle inlet pipe is communicated with the inlet end of an inlet hose, the outlet end of the drying bottle outlet pipe extends into the inlet end of a buffer air chamber, the outlet end of the buffer air chamber is respectively provided with a pressure sensor leading pipe and a gas sensor and a micro-pressure sensor and a gas metering pump, and a micro-sensor data acquisition system are respectively connected with the data acquisition system through the micro-pressure sensor and the air chamber.
The Y-axis mechanical arm is further installed in the middle of the right upright post and can move along the vertical direction, the X-axis mechanical arm is installed in a sliding mode and can move along the horizontal direction, the mechanical arm is installed at the movable end of the X-axis mechanical arm and is used for grabbing a drying bottle so as to achieve the purposes that the grabbing drying bottle is upwards inserted into the drying bottle inlet pipe and the drying bottle outlet pipe, or is downwards pulled to be separated from the drying bottle inlet pipe and the drying bottle outlet pipe, and the drying bottle is placed on a balance.
The pipeline fixing frame is provided with a first pinch valve and a second pinch valve, the first pinch valve is installed in the middle of the U-shaped structure of the pipeline fixing frame and used for fixing the positions of the drying bottle inlet pipe and the drying bottle outlet pipe on the pipeline fixing frame, and the second pinch valve is used for fixing the position of the inlet hose on the pipeline fixing frame.
The through hole of the drying bottle is respectively provided with an inlet self-sealing pressing cap and an outlet self-sealing pressing cap, the inlet self-sealing pressing cap and the outlet self-sealing pressing cap are provided with central holes, the central holes of the inlet self-sealing pressing caps and the inlet pipe of the drying bottle are arranged oppositely, and the central holes of the outlet self-sealing pressing caps and the outlet pipe of the drying bottle are arranged oppositely.
The inlet end of the buffer air chamber is provided with an air chamber lower plug, the outlet end of the drying bottle outlet pipe penetrates through the air chamber lower plug and stretches into the buffer air chamber, the outlet end of the buffer air chamber is provided with an air chamber upper plug, and the micro-pressure sensor pressure guiding pipe and the air metering pump inlet pipe are both inserted into the air chamber upper plug.
The application method of the automatic metering device for the tight sandstone phase seepage experimental fluid comprises the following steps:
Step 1, filling a drying agent in a drying bottle before an experiment starts, and mounting the drying agent on an automatic metering device, namely, an inlet self-sealing cap and an outlet self-sealing cap of the drying bottle are respectively aligned with an inlet pipe and an outlet pipe of the drying bottle, and then lifting the drying bottle until the inlet pipe and the outlet pipe of the drying bottle are respectively inserted into central holes of the inlet self-sealing cap and the outlet self-sealing cap, which are the positioning reference starting points of a manipulator;
Step 2, when an experiment starts, a manipulator grabs a drying bottle, pulls the drying bottle away from an inlet pipe and an outlet pipe of the drying bottle, puts the drying bottle on a weighing disc of a balance to weigh initial weight, acquires and records initial weight values by a data acquisition system, then grabs the drying bottle by the manipulator, accesses the inlet pipe and the outlet pipe of the drying bottle, enters an on-line running state, waits for a specified time interval, grabs the drying bottle again, pulls the drying bottle away from the inlet pipe and the outlet pipe of the drying bottle, puts the drying bottle on the balance to weigh, acquires data by the data acquisition system and records, and repeats the process until the experimental process is finished;
Step 3, in the whole experimental process, the gas flow at the outlet of the core holder is also measured, and the measuring process is as follows: when the drying bottle is communicated with the drying bottle inlet pipe and the drying bottle outlet pipe, the second pinch valve is opened, gas enters the drying bottle through the inlet hose, the drying bottle inlet pipe and the inlet self-sealing pressure cap, the drying agent in the drying bottle absorbs moisture in the outlet gas, the dried gas enters the buffer air chamber through the outlet self-sealing pressure cap and the drying bottle outlet pipe, is respectively led to the micro-pressure sensor and the gas metering pump through the air chamber upper plug, the micro-pressure sensor pressure leading pipe and the gas metering pump inlet pipe, the gas enters the drying bottle and the buffer air chamber, the micro-pressure sensor senses pressure signals and is transmitted to the data acquisition system through amplification treatment, the data acquisition system sends out instructions to start the gas metering pump, pumping is then carried out, the pressure reduction is stopped, the micro-pressure sensor, the data acquisition system and the gas metering pump form a stable closed-loop control system, the air pressure can be accurately controlled and the gas metering pump sends out accurate pulse to control, and pumping is metering.
In order to prevent the dry bottle from being weighed off line, the core outlet air and water is still in the air inlet state, so that the loss of air or water is caused, and metering is omitted, when the dry bottle is separated from the dry bottle inlet pipe and the dry bottle outlet, the first pinch valve breaks the inlet hose, and the dry bottle is released during on-line operation.
And (3) online operation: the core holder outlet water-containing gas is connected into a metering device through an inlet hose, the metering device is connected into a drying bottle inlet pipe and a drying bottle outlet according to a drying bottle, and the weighing is carried out offline: the drying bottle is separated from the drying bottle inlet pipe and the drying bottle outlet and is placed on a balance for weighing. In the actual experimental process, the gas production and water production data of each stage of the whole experiment need to be obtained, and the two states of online operation and offline weighing are replaced when the gas production and water production data are not judged.
The beneficial effects of the invention are as follows: the system is added with high-precision gas metering, a high-precision micro-pressure sensor is configured, the micro-pressure sensor senses the micro pressure of the gas at the outlet of the core holder, the metering pump is driven through signal amplification treatment, the air pump pumps the gas when the pressure is increased, the pressure is reduced when the pressure is pumped, the pump is stopped, stable closed-loop control is formed between the micro-pressure sensor and the metering pump, and the high-precision metering is realized. The metering resolution can reach 0.1ml.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic elevational view of the present invention;
FIG. 3 is a schematic side elevational view of the present invention;
in the figure: 1 is a bottom plate, 2 is a balance, 3 is a drying bottle, 4 is a manipulator, 5 is an outlet self-sealing pressure cap, 6 is an inlet self-sealing pressure cap, 7 is a left upright, 8 is a first pinch valve, 9 is an inlet hose, 10 is a second pinch valve, 11 is a lower air chamber plug, 12 is a buffer air chamber, 13 is an upper air chamber plug, 14 is a micro-pressure sensor, 15 is a micro-pressure sensor pressure guiding pipe, 16 is a gas metering pump inlet pipe, 17 is a drying bottle inlet pipe, 18 is a drying bottle outlet pipe, 19 is a gas metering pump, 20 is a cross beam, 21 is a right upright, 22 is a pipeline fixing frame, 23 is a Y-axis mechanical arm, 24 is an X-axis mechanical arm, and 25 is a data acquisition system.
Other relevant drawings may be made by those of ordinary skill in the art from the above figures without undue burden.
Detailed Description
The technical scheme of the invention is further described by specific examples.
Example 1
An automatic metering device for a tight sandstone phase seepage experimental fluid comprises a bottom plate 1, a balance 2, a micro-pressure sensor 14, a gas metering pump 19 and a data acquisition system 25,
The balance 2 is arranged on the upper surface of the bottom plate 1, a left upright post 7 and a right upright post 21 are respectively fixed on the bottom plate 1 on two sides of the balance 2, the head end of the left upright post 7 and the head end of the right upright post 21 are respectively connected with each other through a cross beam 20, a gas metering pump 19 is arranged on the cross beam 20, a pipeline fixing frame 22 is arranged between the left upright post 7 and the right upright post 21 below the cross beam 20, the pipeline fixing frame 22 adopts a U-shaped structure, a drying bottle inlet pipe 17 and a drying bottle outlet pipe 18 are respectively arranged in the middle of the U-shaped structure of the pipeline fixing frame 22, a drying bottle 3 is arranged under the drying bottle inlet pipe 17 and the drying bottle outlet pipe 18, through holes are respectively formed in the drying bottle 3, the inlet end of the drying bottle inlet pipe 17 and the inlet end of the drying bottle outlet pipe 18 are respectively arranged opposite to the through holes, the outlet end of the drying bottle inlet pipe 17 and the inlet end of the inlet hose 9 are respectively connected with the inlet end of the gas metering pump 9, the outlet end of the drying bottle outlet pipe 18 stretches into the inlet end of the buffer air chamber 12, the outlet end of the buffer air chamber 12 is respectively provided with a micro-pressure sensor lead-in 15 and a gas inlet pipe 16, the data acquisition system is respectively connected with the buffer air chamber 14 and the micro-pressure sensor 14 through the micro-pressure sensor lead-in the micro-pressure sensor 12 and the buffer air chamber 14, and the data acquisition system 25.
Example two
On the basis of the first embodiment, a Y-axis mechanical arm 23 is further installed in the middle of the right upright post 21, the Y-axis mechanical arm 23 can move along the vertical direction, an X-axis mechanical arm 24 is slidably installed on the Y-axis mechanical arm 23, the X-axis mechanical arm 24 can move along the horizontal direction, a mechanical arm 4 is installed at the movable end of the X-axis mechanical arm 24, and the mechanical arm 4 is used for grabbing the drying bottle 3, so that the purpose that the drying bottle 3 is grabbed to be inserted into the drying bottle inlet pipe 17 and the drying bottle outlet pipe 18 upwards or to be pulled downwards to be separated from the drying bottle inlet pipe 17 and the drying bottle outlet pipe 18 is achieved, and the drying bottle is placed on a balance.
A first pinch valve 8 and a second pinch valve 10 are arranged on the pipeline fixing frame 22, the first pinch valve 8 is arranged in the middle of the U-shaped structure of the pipeline fixing frame 22 and is used for fixing the positions of the drying bottle inlet pipe 17 and the drying bottle outlet pipe 18 on the pipeline fixing frame 22, and the second pinch valve 10 is used for fixing the positions of the inlet hose 9 on the pipeline fixing frame 22.
Example III
On the basis of the second embodiment, an inlet self-sealing cap 6 and an outlet self-sealing cap 5 are respectively arranged on the through hole of the drying bottle 3, a central hole is formed in the inlet self-sealing cap 6 and the outlet self-sealing cap 5, the central hole of the inlet self-sealing cap 6 is opposite to the drying bottle inlet pipe 17, and the central hole of the outlet self-sealing cap 5 is opposite to the drying bottle outlet pipe 18.
The inlet end of the buffer air chamber 12 is provided with an air chamber lower plug 11, the outlet end of the drying bottle outlet pipe 18 penetrates through the air chamber lower plug 11 and stretches into the buffer air chamber 12, the outlet end of the buffer air chamber 12 is provided with an air chamber upper plug 13, and the micro-pressure sensor pressure guiding pipe 15 and the gas metering pump inlet pipe 16 are both inserted into the air chamber upper plug 13.
Example IV
The application method of the automatic metering device for the tight sandstone phase seepage experimental fluid comprises the following steps:
Step 1, filling a drying agent in a drying bottle before an experiment starts, and mounting the drying agent on an automatic metering device, namely, an inlet self-sealing cap and an outlet self-sealing cap of the drying bottle are respectively aligned with an inlet pipe and an outlet pipe of the drying bottle, and then lifting the drying bottle until the inlet pipe and the outlet pipe of the drying bottle are respectively inserted into central holes of the inlet self-sealing cap and the outlet self-sealing cap, which are the positioning reference starting points of a manipulator;
Step 2, when an experiment starts, a manipulator grabs a drying bottle, pulls the drying bottle away from an inlet pipe and an outlet pipe of the drying bottle, puts the drying bottle on a weighing disc of a balance to weigh initial weight, acquires and records initial weight values by a data acquisition system, then grabs the drying bottle by the manipulator, accesses the inlet pipe and the outlet pipe of the drying bottle, enters an on-line running state, waits for a specified time interval, grabs the drying bottle again, pulls the drying bottle away from the inlet pipe and the outlet pipe of the drying bottle, puts the drying bottle on the balance to weigh, acquires data by the data acquisition system and records, and repeats the process until the experimental process is finished;
Step 3, in the whole experimental process, the gas flow at the outlet of the core holder is also measured, and the measuring process is as follows: when the drying bottle is communicated with the drying bottle inlet pipe and the drying bottle outlet pipe, the second pinch valve is opened, gas enters the drying bottle through the inlet hose, the drying bottle inlet pipe and the inlet self-sealing pressure cap, the drying agent in the drying bottle absorbs moisture in the outlet gas, the dried gas enters the buffer air chamber through the outlet self-sealing pressure cap and the drying bottle outlet pipe, is respectively led to the micro-pressure sensor and the gas metering pump through the air chamber upper plug, the micro-pressure sensor pressure leading pipe and the gas metering pump inlet pipe, the gas enters the drying bottle and the buffer air chamber, the micro-pressure sensor senses pressure signals and is transmitted to the data acquisition system through amplification treatment, the data acquisition system sends out instructions to start the gas metering pump, pumping is then carried out, the pressure reduction is stopped, the micro-pressure sensor, the data acquisition system and the gas metering pump form a stable closed-loop control system, the air pressure can be accurately controlled and the gas metering pump sends out accurate pulse to control, and pumping is metering.
In order to prevent the dry bottle from being weighed off line, the core outlet air and water is still in the air inlet state, so that the loss of air or water is caused, and metering is omitted, when the dry bottle is separated from the dry bottle inlet pipe and the dry bottle outlet, the first pinch valve breaks the inlet hose, and the dry bottle is released during on-line operation.
And (3) online operation: the core holder outlet water-containing gas is connected into a metering device through an inlet hose, the metering device is connected into a drying bottle inlet pipe and a drying bottle outlet according to a drying bottle, and the weighing is carried out offline: the drying bottle is separated from the drying bottle inlet pipe and the drying bottle outlet and is placed on a balance for weighing. In the actual experimental process, the gas production and water production data of each stage of the whole experiment need to be obtained, and the two states of online operation and offline weighing are replaced when the gas production and water production data are not judged.
Spatially relative terms, such as "upper," "lower," "left," "right," and the like, may be used in the embodiments for ease of description to describe one element or feature's relationship to another element or feature's illustrated in the figures. It will be understood that the spatial terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "under" other elements or features would then be oriented "over" the other elements or features. Thus, the exemplary term "lower" may encompass both an upper and lower orientation. The device may be otherwise positioned (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
Moreover, relational terms such as "first" and "second", and the like, may be used solely to distinguish one element from another element having the same name, without necessarily requiring or implying any actual such relationship or order between such elements.
The foregoing detailed description of the invention has been presented for purposes of illustration and description, but is not intended to limit the scope of the invention. All equivalent changes and modifications within the scope of the present invention are intended to be covered by the present invention.
Claims (3)
1. An automatic metering device for a tight sandstone phase seepage experimental fluid is characterized in that: comprises a bottom plate, a balance, a micro-pressure sensor, a gas metering pump and a data acquisition system,
The balance is arranged on the upper surface of the bottom plate, a left upright post and a right upright post are respectively fixed on the bottom plate on two sides of the balance, the head end of the left upright post and the head end of the right upright post are connected with each other through a cross beam, the gas metering pump is arranged on the cross beam, a pipeline fixing frame is arranged between the left upright post and the right upright post below the cross beam, the pipeline fixing frame adopts a U-shaped structure, a drying bottle inlet pipe and a drying bottle outlet pipe are arranged in the middle of the U-shaped structure of the pipeline fixing frame, a drying bottle is arranged right below the drying bottle inlet pipe and the drying bottle outlet pipe, through holes are formed in the drying bottle, the inlet end of the drying bottle inlet pipe and the inlet end of the drying bottle outlet pipe are respectively arranged opposite to the through holes, the outlet end of the drying bottle inlet pipe is communicated with the inlet end of an inlet hose, the outlet end of the drying bottle outlet pipe extends into the inlet end of a buffer air chamber, the outlet end of the buffer air chamber is respectively provided with a micro-pressure sensor pressure pipe and a gas metering pump, and the micro-pressure sensor and the data acquisition system are respectively connected with the data acquisition system through the micro-pressure sensor and the air chamber and the data acquisition system;
The middle part of the right upright post is also provided with a Y-axis mechanical arm which can move along the vertical direction, the Y-axis mechanical arm is slidably provided with an X-axis mechanical arm which can move along the horizontal direction, the movable end of the X-axis mechanical arm is provided with a mechanical arm which is used for grabbing a drying bottle so as to realize the purposes that the grabbing drying bottle is upwards inserted into a drying bottle inlet pipe and a drying bottle outlet pipe or downwards pulled to be separated from the drying bottle inlet pipe and the drying bottle outlet pipe and is placed on a balance;
the pipeline fixing frame is provided with a first pinch valve and a second pinch valve, the first pinch valve is arranged in the middle of the U-shaped structure of the pipeline fixing frame and used for fixing the positions of the inlet pipe and the outlet pipe of the drying bottle on the pipeline fixing frame, and the second pinch valve is used for fixing the position of the inlet hose on the pipeline fixing frame;
An inlet self-sealing cap and an outlet self-sealing cap are respectively arranged on the through hole of the drying bottle, central holes are formed in the inlet self-sealing cap and the outlet self-sealing cap, the central holes of the inlet self-sealing cap are opposite to the inlet pipe of the drying bottle, and the central holes of the outlet self-sealing cap are opposite to the outlet pipe of the drying bottle;
The inlet end of the buffer air chamber is provided with an air chamber lower plug, the outlet end of the drying bottle outlet pipe penetrates through the air chamber lower plug and stretches into the buffer air chamber, the outlet end of the buffer air chamber is provided with an air chamber upper plug, and the micro-pressure sensor pressure guiding pipe and the air metering pump inlet pipe are both inserted into the air chamber upper plug.
2. The application method of the automatic metering device for the tight sandstone phase seepage experimental fluid is characterized by comprising the following steps of: an automatic metering device for a tight sandstone infiltration experimental fluid according to claim 1 is adopted and is carried out according to the following steps:
Step 1, filling a drying agent in a drying bottle before an experiment starts, and mounting the drying agent on an automatic metering device, namely, an inlet self-sealing cap and an outlet self-sealing cap of the drying bottle are respectively aligned with an inlet pipe and an outlet pipe of the drying bottle, and then lifting the drying bottle until the inlet pipe and the outlet pipe of the drying bottle are respectively inserted into central holes of the inlet self-sealing cap and the outlet self-sealing cap, which are the positioning reference starting points of a manipulator;
Step 2, when an experiment starts, a manipulator grabs a drying bottle, pulls the drying bottle away from an inlet pipe and an outlet pipe of the drying bottle, puts the drying bottle on a weighing disc of a balance to weigh initial weight, acquires and records initial weight values by a data acquisition system, then grabs the drying bottle by the manipulator, accesses the inlet pipe and the outlet pipe of the drying bottle, enters an on-line running state, waits for a specified time interval, grabs the drying bottle again, pulls the drying bottle away from the inlet pipe and the outlet pipe of the drying bottle, puts the drying bottle on the balance to weigh, acquires data by the data acquisition system and records, and repeats the process until the experimental process is finished;
Step 3, in the whole experimental process, the gas flow at the outlet of the core holder is also measured, and the measuring process is as follows: when the drying bottle is communicated with the drying bottle inlet pipe and the drying bottle outlet pipe, the second pinch valve is opened, gas enters the drying bottle through the inlet hose, the drying bottle inlet pipe and the inlet self-sealing pressure cap, the drying agent in the drying bottle absorbs moisture in the outlet gas, the dried gas enters the buffer air chamber through the outlet self-sealing pressure cap and the drying bottle outlet pipe, is respectively led to the micro-pressure sensor and the gas metering pump through the air chamber upper plug, the micro-pressure sensor pressure leading pipe and the gas metering pump inlet pipe, the gas enters the drying bottle and the buffer air chamber, the micro-pressure sensor senses pressure signals and is transmitted to the data acquisition system through amplification treatment, the data acquisition system sends out instructions to start the gas metering pump, pumping is then carried out, the pressure reduction is stopped, the micro-pressure sensor, the data acquisition system and the gas metering pump form a stable closed-loop control system, the air pressure can be accurately controlled and the gas metering pump sends out accurate pulse to control, and pumping is metering.
3. The method for using the automatic metering device for the tight sandstone phase seepage experimental fluid according to claim 2, wherein the method comprises the following steps: the first pinch valve breaks the inlet hose when the drying bottle is disengaged from the drying bottle inlet tube and drying bottle outlet.
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|---|---|---|---|---|
| CN208283230U (en) * | 2018-05-10 | 2018-12-25 | 西南石油大学 | It is a kind of for measuring the device of compact rock core air water two-phase relative permeability |
| CN109357976A (en) * | 2018-10-25 | 2019-02-19 | 中国海洋石油集团有限公司 | A kind of multiphase flow automatic collection metering system |
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| CN114458285A (en) | 2022-05-10 |
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