CN209182187U - A kind of CO2Displacement test device - Google Patents
A kind of CO2Displacement test device Download PDFInfo
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- CN209182187U CN209182187U CN201821979442.5U CN201821979442U CN209182187U CN 209182187 U CN209182187 U CN 209182187U CN 201821979442 U CN201821979442 U CN 201821979442U CN 209182187 U CN209182187 U CN 209182187U
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Abstract
The utility model discloses a kind of CO2Displacement test device, including gas refrigeration system, gas injection system, liquid injection system and rock core grasping system；Gas refrigeration system is by being equipped with CO2Gas cylinder, clarifier, refrigeration water-bath, the first CO2 pump and storage tank be sequentially connected composition；Gas injection system passes through storage tank and the 2nd CO2Pump and surge tank are sequentially connected；Liquid injection system includes two branches in parallel, and the first branch includes first piston container, and second branch detains second piston container by packet；The entrance of liquid injection system is successively connect with topping-up pump, the first container, and outlet is connected with surge tank outlet；Rock core grasping system includes core holding unit；Core holding unit connects gas injection system and liquid injection system.The displacement process to reservoir core of carbon dioxide or aqueous solution in different displacements, different temperatures, different pressures, different solutions proportion can be simulated and be tested to utility model device, calculate irreducible water saturation, or remnants CO2Saturation degree.
Description
Technical field
The utility model belongs to carbon dioxide and water multiphase technical field, in particular to a kind of CO2Displacement test device.
Background technique
In recent years, the anhydrous fracturing technique of carbon dioxide, CO2Unconventional gas and CO are developed in displacement2Geological storage etc.
Related technology is increasingly becoming the hot spot of current people's research.They are all referred to about CO2With water (or aqueous solution or waterpower
Fracturing fluid) in the two phase fluid flow of reservoir or the process of displacement.
However, existing displacement test device is only for gas phase displacement, perhaps liquid phase displacement or injection pressure are fluctuated
It is larger, it causes experimental error larger, CO can not be met simultaneously2With water (or aqueous solution or hydrofrac fluid) in the two-phase of reservoir
The process of seepage flow and displacement.
Utility model content
The purpose of this utility model is to provide a kind of CO2Displacement test device, to solve the above technical problems；This is practical
Carbon dioxide or aqueous solution can be simulated and be tested to new device in different displacements, different temperatures, different pressures, different solutions
The displacement process to reservoir core in the case of proportion calculates irreducible water saturation, or remnants CO2Saturation degree.
To achieve the goals above, the utility model adopts the following technical solution:
A kind of CO2Displacement test device, including gas refrigeration system, gas injection system, liquid injection system and rock core
Grasping system；
The gas refrigeration system is by being equipped with CO2Gas cylinder (1), the first valve (2), clarifier (3), the second valve (4), refrigeration
Water-bath (5), the 5th valve (10), the first CO2Pump (11), the 6th valve (12) and storage tank (14) are sequentially connected composition；Freeze water-bath (5)
By being connected at the top of the 4th valve (7), filter (8) and storage tank (14)；
The gas injection system passes through storage tank (14) and the 2nd CO2Pump (15) and surge tank (19) are sequentially connected, in addition,
The bottom of surge tank (19) is connected with the emptying branch controlled by the 8th valve (20)；
The liquid injection system includes two branches in parallel, and the first branch includes first piston container (24), and second
Branch routing packet button second piston container (25)；The entrance of liquid injection system passes through the 12nd valve (26), the 13rd valve respectively
(27) it is connect with topping-up pump (28), the first container (29), the tenth valve (22), the 11st valve (23) and surge tank are passed through in outlet respectively
(19) outlet is connected；
The rock core grasping system includes core holding unit (33)；Core holding unit (33) connects gas injection system and liquid
Body injected system.
It further, further include winding pressure system, metering system and pumped vacuum systems；
Winding pressure system include sequentially connected hand pump (36), the 16th valve (38), the 6th pressure gauge (40) and
Back-pressure valve (41)；Core holding unit (33) side passes sequentially through the 4th pressure gauge (34), the 15th valve (35) and hand pump (36)
It is connected；Hand pump (36) can control the size of output back pressure and ring pressure by valve；The outlet of core holding unit (33) according to
The secondary first entrance for passing through the 5th pressure gauge (37), the 17th valve (39) connection back-pressure valve (41)；
The metering system includes gas-liquid separator (43)；Outlet connection gas-liquid separator (43) of back-pressure valve (41) enters
Mouthful；The outlet at bottom of gas-liquid separator (43) is connected with second container (45), and the bottom of second container (45) is provided with balance
(44)；The top of gas-liquid separator (43) is equipped with gas flowmeter (42)；
The pumped vacuum systems includes vacuum pump (30), by pipeline be connected to the 9th valve (21) and the 14th valve (31) it
Between.
Further, CO2Gas cylinder (1) and clarifier (3) between be equipped with the first valve (2)；Clarifier (3) and refrigeration water-bath
(5) the second valve (4) are equipped between；Freeze water-bath (5) and the first CO2It pumps and is equipped with the 5th valve (10) between (11)；First CO2Pump
(11) the 6th valve (12) is equipped between storage tank (14)；Freeze water-bath (5) successively by the 4th valve (7), filter (8) and storage tank
(14) it is connected at the top of；The the first emptying branch controlled by third valve (6) is additionally provided at the top of refrigeration water-bath (5)；
First pressure meter (13) and thermometer (9) are provided at the top of storage tank (14).
Further, the 9th valve (21) and the 14th valve (31) are equipped between surge tank (19) and core holding unit (33),
The bottom of surge tank (19) is connected with the second emptying branch of the 8th valve (20) control；Surge tank is connected with second at the top of (19)
The third that pressure gauge (17), seven valve (16) of safety valve (18) He You control is vented branch；
The first branch of liquid injection system by the tenth valve (22), first piston container (24), the 12nd valve (26) successively
Connection composition, second branch are sequentially connected and are formed by the 11st valve (23), second piston container (25), the 13rd valve (27)；Liquid
The outlet of body injected system connects between the 9th valve (21) and the 14th valve (31)；
Rock core grasping system include sequentially connected 14th valve (31), third pressure gauge (32), core holding unit (33),
5th pressure gauge (37) and the 17th valve (39)；Core holding unit (33) side is provided with the 4th pressure gauge (34).
Further, the first CO in gas injection system2It pumps (11) to pump using parallel bars constant speed and constant pressure, the first CO2Pump (11)
Arrival end is connected to the bottom of refrigeration water-bath (5) by the 5th valve (10), and outlet end is connected to storage tank by the 6th valve (12)
(14) bottom；2nd CO2CO can be controlled according to outlet pressure by pumping (15)2The starting or pause of output guarantee surge tank
(19) pressure is constant in.
Further, the pumped vacuum systems is used for before experiment, extracts air in rock sample gap and instrument system out, is eliminated
Interference of the air to experiment measuring accuracy.
Further, the casing containing package experiment rock core inside rock core grasping system.
Further, gas flowmeter (42) is wet gas flow meter；Balance (44) selects precision a ten thousandth or more
High accuracy balance.
Compared with prior art, the utility model has the beneficial effects that
(1) the utility model is exclusively used in simulating and testing carbon dioxide and water in different temperatures, different pressures, different rows
The extent of injury to reservoir core in the case where amount, different liquids proportion.
(2) gas refrigeration system includes that refrigeration water-bath 5 can flexibly control output CO2Temperature, with liquid when guarantee needs
The first CO of form2Pump output.
(3) the first CO2Pump 11 is pumped using parallel bars constant speed and constant pressure, it guarantees CO2Liquid constant pressure or constant flow rate are defeated
Out.It is connected at the top of refrigeration water-bath 5 and storage tank 14 by the 4th valve 7 and filter 8, can be used for adjusting the two internal pressure, and
Design has third valve 6 to play the role of prevention and control.The design of storage tank 14 has temperature controlling function, guarantees internal CO2For liquid.Furthermore design has slow
Pressure buffer can be played the role of by rushing tank 19, be conducive to experimental pressure and steadily carried out.2nd CO2Pump 15 can be pressed according to outlet
Power controls CO2The starting or pause of output guarantee that pressure is constant in surge tank 19.
(4) vacuum pump 30 extracts air in rock sample gap and instrument system out before experiment, eliminates air and does to experiment
It disturbs.
(5) casing containing package experiment rock core inside rock core grasping system, using the material of high temperature-resistant acid-resistant, and has very
High ductility, can be to avoid CO in experimentation2It is corroded.
(6) liquid injection system design have first piston container 24 and second piston container 25, can according to need of work,
It is flexibly controlled by valve, one or two is selected to work at the same time.
(7) winding pressure system is flexibly controlled by hand pump 36 and valve, and control pressure is stablized, convenient for operation.
(8) gas flowmeter 42 is wet gas flow meter in metering system.Balance 44 selects high accuracy balance, precision ten thousand
/ mono- or more.Gas-liquid separator 43 can will pass through its CO2It is separated with liquid, convenient for metering and weighing.
(9) all connecting pipelines of the utility model are all made of 316L pipeline, to prevent CO2Acidity of the anhydrous fracturing fluid to pipeline
Corrosion.
Detailed description of the invention
Fig. 1 is a kind of CO of the utility model2The structural schematic diagram of displacement test device.
Specific embodiment
The embodiments of the present invention is described in detail with reference to the accompanying drawings and examples.
As shown in Figure 1, the utility model provides a kind of CO2Displacement test device, including gas refrigeration system, vacuumize and be
System, gas injection system, liquid injection system, rock core grasping system, winding pressure system and metering system.
Gas refrigeration system is by being equipped with CO2Gas cylinder 1, the first valve 2, clarifier 3, the second valve 4, refrigeration water-bath 5, the 5th valve
10, the first CO2The 11, the 6th valve 12 of pump, storage tank 14 are sequentially connected composition.In addition, refrigeration water-bath 5 is successively by the 4th valve 7, filtering
Device 8 is connected with the top of storage tank 14.The emptying branch controlled by third valve 6 is also devised at the top of refrigeration water-bath 5.Storage
The top design of tank 14 has first pressure meter 13 and thermometer 9.
Gas injection system passes through storage tank 14 and the 2nd CO2Pump 15, surge tank 19, the 9th valve 21 are sequentially connected, in addition, slow
The bottom for rushing tank 19 is connected with the emptying branch of the 8th valve 20 control, after placing liquid entrance, empties to it；Surge tank 19
Top be connected with second pressure meter 17, safety valve 18 and the emptying branch controlled by the 7th valve 16.
Liquid injection system includes two branches in parallel, and the first branch is by the tenth valve 22, first piston container the 24, the tenth
Two valves 26 are sequentially connected, and second branch is sequentially connected by the 11st valve 23, second piston container 25, the 13rd valve 27；Liquid note
The entrance for entering system is successively connect with topping-up pump 28, the first container 29, and outlet is connected with the outlet of the 9th valve 21.
Rock core grasping system includes sequentially connected 14th valve 31, core holding unit 33 and the 17th valve 39, wherein tightly
Adjacent 33 entrance both ends of core holding unit are connected separately with third pressure gauge 32 and the 5th pressure gauge 37.33 side of core holding unit
Design has the 4th pressure gauge 34, can be used for measuring its ring pressure.
It includes sequentially connected hand pump 36, the 16th valve 38 and back-pressure valve 41 that winding, which presses system,；16th valve 38 goes out
Mouth pipeline is equipped with the 6th pressure gauge 40.In addition, 33 side of core holding unit passes sequentially through the 4th pressure gauge 34, the 15th valve 35
It is connected with hand pump 36.Hand pump 36 can flexibly control output back pressure, the size of ring pressure by valve.
Metering system includes gas-liquid separator 43 and gas flowmeter 42；The output end of 17th valve 39 connects back-pressure valve 41
First entrance, the second entrance of the outlet connection back-pressure valve 41 of the 16th valve 38, the outlet of back-pressure valve 41 connects gas-liquid separation
Device 43；The top of gas-liquid separator 43 is equipped with gas flowmeter 42.The outlet at bottom of gas-liquid separator 43 and 45 phase of second container
The bottom design of connection, second container 45 has balance 44.Metering system further includes the third positioned at core entry end and outlet end
Pressure gauge 32 and the 5th pressure gauge 37.Gas flowmeter 42 uses wet gas flow meter.
Pumped vacuum systems is made of vacuum pump 30, is connected between the 9th valve 21 and the 14th valve 31.
Gas refrigeration system includes refrigeration water-bath 5, and refrigeration water-bath 5 can flexibly control output CO2Temperature, when guarantee needs
In liquid form with the first CO2Pump output.
First CO in gas injection system2Pump 11 is pumped using parallel bars constant speed and constant pressure, its arrival end is connected to refrigeration water-bath 5
Bottom, guarantee CO2Liquid constant pressure or constant flow rate output, outlet end is connected to the bottom of storage tank 14.Storage tank 14 is set
In respect of temperature controlling function, guarantee internal CO2For liquid.Furthermore design has surge tank 19 that can play the role of pressure buffer, is conducive to real
Pressure is tested steadily to carry out.2nd CO2Pump 15 can control CO according to outlet pressure2The starting or pause of output guarantee buffering
Pressure is constant in tank 19.
Pumped vacuum systems before experiment, extracts air in rock sample gap and instrument system out with vacuum pump 30, eliminates air pair
The interference of experiment.Casing containing package experiment rock core inside rock core grasping system, using the material of high temperature-resistant acid-resistant, and has very
High ductility, can be to avoid CO in experimentation2It is corroded.
Liquid injection system design has first piston container 24 and second piston container 25, can be led to according to need of work
Valve is crossed flexibly to control.
Winding pressure system is flexibly controlled by hand pump 36 and valve, increases and decreases pressure.
A kind of CO of the utility model2When displacement experiment device works, steps are as follows for test method:
Step 1, to core porosity, pore volume, permeability, test.
Step 2, rock core is placed in certain time in oven (such as 24 hours), removes its internal moisture, then weighs
Rock core dry weight M0.
Step 3, the rock core after rock core dry weight will be weighed and is placed in core holding unit 33, and close the 9th valve the 21, the tenth
Valve 22, the 11st valve 23, the 15th valve 35 and the 17th valve 39 are opened vacuum pump 30 and are vacuumized.
Step 4, the aqueous solution of experiment (either fracturing fluid) is placed in first piston container 24 or second piston is held
The top of device 25.It opens topping-up pump 28 to suck clear water in the first container 29, experimental water solution drive is replaced and is clamped by rock core
Rock sample in device 33, is allowed to saturated water, then takes out rock sample weighing M1.
Step 5, the first valve 2, the second valve 4, the 5th valve 10, the 6th valve 12 are opened, so that CO2Gas passes through the first CO2Pump into
Enter storage tank 14, while regulating the temperature of refrigeration water-bath 5 and storage tank 14, arrives experimental temperature appropriate.
Regulate the 2nd CO2Pump 15, so that CO in surge tank 192It is maintained at the steady pressure that experiment needs, and constantly defeated
Enter into core holding unit 33, so that rock sample therein is saturated CO2, then to rock sample weighing M2.Then show in this experiment condition
Under irreducible water saturation Swr are as follows:
Swr=(M2-M0)/(M1-M0)
Step 6, change experiment condition, adjust different temperatures, different pressures, different displacements and different solutions (or pressure break
Liquid) proportion, test core permeability K under this conditioni, compare the rock core original permeability K measured in advance0, obtain corresponding conditions
Under the extent of injury F caused by reservoir core.
F=(K0-Ki)/K0× 100%
Similarly, change the sequencing of saturation with displacement, first inject CO to rock core2, it is made to be saturated CO2, then use aqueous solution
Displacement.Assuming that by the 2nd CO2Pump 15 is accumulative to enter CO in experimental channel2Quality is M3, remain in the 2nd CO2Pump 15 and rock core
CO in pipe-line system before 33 arrival end of clamper2Quality is M4(measurement manifold volume and CO under this condition can be passed through2It is close
Degree product is metered into), the CO flowed out from rock core2Quality is M5(pure CO2Gas), it is isolated by gas-liquid separator 43 with molten
Solution condition flows out CO2Quality is M6, 33 internal temperature of core holding unit, pressure condition lower density are R, rock core when experiment terminates
Sample pore volume is that V can be calculated then according to mass conservation law and be remained in rock sample inside supercritical CO2Saturation degree is
Sgr:
Sgr=(M3-M4-M5-M6)/(RV)。
A kind of CO of the utility model2Carbon dioxide and aqueous solution (or waterpower can be simulated and be tested to displacement test device
Fracturing fluid) in different displacements, different temperatures, different pressures and situation different in flow rate, it, can to the extent of injury of reservoir core
To calculate irreducible water saturation, or remnants CO2Saturation degree.
Claims (8)
1. a kind of CO2Displacement test device, which is characterized in that including gas refrigeration system, gas injection system, liquid injection system
System and rock core grasping system；
The gas refrigeration system is by being equipped with CO2Gas cylinder (1), the first valve (2), clarifier (3), the second valve (4), refrigeration water-bath
(5), the 5th valve (10), the first CO2Pump (11), the 6th valve (12) and storage tank (14) are sequentially connected composition；Refrigeration water-bath (5) is passed through
It is connected at the top of 4th valve (7), filter (8) and storage tank (14)；
The gas injection system passes through storage tank (14) and the 2nd CO2Pump (15) and surge tank (19) are sequentially connected, in addition, buffering
The bottom of tank (19) is connected with the emptying branch controlled by the 8th valve (20)；
The liquid injection system includes two branches in parallel, and the first branch includes first piston container (24), second branch
Second piston container (25) are detained by packet；The entrance of liquid injection system pass through respectively the 12nd valve (26), the 13rd valve (27) with
Topping-up pump (28), the first container (29) connection, outlet go out by the tenth valve (22), the 11st valve (23) and surge tank (19) respectively
Mouth is connected；
The rock core grasping system includes core holding unit (33)；Core holding unit (33) connects gas injection system and liquid note
Enter system.
2. a kind of CO according to claim 12Displacement test device, which is characterized in that further include winding pressure system, metering
System and pumped vacuum systems；
The winding pressure system includes sequentially connected hand pump (36), the 16th valve (38), the 6th pressure gauge (40) and back pressure
Valve (41)；Core holding unit (33) side passes sequentially through the 4th pressure gauge (34), the 15th valve (35) is connected with hand pump (36)
It connects；Hand pump (36) can control the size of output back pressure and ring pressure by valve；The outlet of core holding unit (33) successively leads to
Cross the first entrance of the 5th pressure gauge (37), the 17th valve (39) connection back-pressure valve (41)；
The metering system includes gas-liquid separator (43)；The entrance of outlet connection gas-liquid separator (43) of back-pressure valve (41)；
The outlet at bottom of gas-liquid separator (43) is connected with second container (45), and the bottom of second container (45) is provided with balance
(44)；The top of gas-liquid separator (43) is equipped with gas flowmeter (42)；
The pumped vacuum systems includes vacuum pump (30), is connected between the 9th valve (21) and the 14th valve (31) by pipeline.
3. a kind of CO according to claim 22Displacement test device, which is characterized in that CO2Gas cylinder (1) and clarifier
(3) the first valve (2) are equipped between；The second valve (4) are equipped between clarifier (3) and refrigeration water-bath (5)；Freeze water-bath (5) and the
One CO2It pumps and is equipped with the 5th valve (10) between (11)；First CO2It pumps and is equipped with the 6th valve (12) between (11) and storage tank (14)；Chilled water
Bath (5) at the top of the 4th valve (7), filter (8) and storage tank (14) successively by being connected；Refrigeration water-bath (5) top also
It is provided with the first emptying branch of third valve (6) control；First pressure meter (13) and temperature are provided at the top of storage tank (14)
Degree meter (9).
4. a kind of CO according to claim 32Displacement test device, which is characterized in that surge tank (19) and core holding unit
(33) the 9th valve (21) and the 14th valve (31) are equipped between, the bottom of surge tank (19) is connected with that the 8th valve (20) controls
Two emptying branches；Second pressure meter (17), the control of seven valve (16) of safety valve (18) He You are connected at the top of surge tank (19)
Third be vented branch；
The first branch of liquid injection system is sequentially connected by the tenth valve (22), first piston container (24), the 12nd valve (26)
Composition, second branch are sequentially connected and are formed by the 11st valve (23), second piston container (25), the 13rd valve (27)；Liquid note
The outlet for entering system connects between the 9th valve (21) and the 14th valve (31)；
Rock core grasping system includes sequentially connected 14th valve (31), third pressure gauge (32), core holding unit (33), the 5th
Pressure gauge (37) and the 17th valve (39)；Core holding unit (33) side is provided with the 4th pressure gauge (34).
5. a kind of CO according to claim 42Displacement test device, which is characterized in that the first CO in gas injection system2
It pumps (11) to pump using parallel bars constant speed and constant pressure, the first CO2The arrival end of pump (11) is connected to refrigeration water-bath (5) by the 5th valve (10)
Bottom, outlet end is connected to the bottoms of storage tank (14) by the 6th valve (12)；2nd CO2Pumping (15) can press according to outlet
Power controls CO2The starting or pause of output guarantee that pressure is constant in surge tank (19).
6. a kind of CO according to claim 42Displacement test device, which is characterized in that the pumped vacuum systems is used in reality
Before testing, air in rock sample gap and instrument system is extracted out, eliminate interference of the air to experiment measuring accuracy.
7. a kind of CO according to claim 42Displacement test device, which is characterized in that contain packet inside rock core grasping system
Wrap up in the casing of experiment rock core.
8. a kind of CO according to claim 42Displacement test device, which is characterized in that gas flowmeter (42) is wet type gas
Flowmeter body；Balance (44) selects the high accuracy balance of precision a ten thousandth or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821979442.5U CN209182187U (en) | 2018-11-28 | 2018-11-28 | A kind of CO2Displacement test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821979442.5U CN209182187U (en) | 2018-11-28 | 2018-11-28 | A kind of CO2Displacement test device |
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| Publication Number | Publication Date |
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| CN209182187U true CN209182187U (en) | 2019-07-30 |
Family
ID=67374728
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201821979442.5U Active CN209182187U (en) | 2018-11-28 | 2018-11-28 | A kind of CO2Displacement test device |
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| CN (1) | CN209182187U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109932272A (en) * | 2018-11-28 | 2019-06-25 | 中国华能集团有限公司 | A kind of CO2Displacement test system and experimental method |
| CN111693433A (en) * | 2020-06-08 | 2020-09-22 | 中国石油天然气股份有限公司 | Core vacuumizing and pressurizing saturated water device and method |
-
2018
- 2018-11-28 CN CN201821979442.5U patent/CN209182187U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109932272A (en) * | 2018-11-28 | 2019-06-25 | 中国华能集团有限公司 | A kind of CO2Displacement test system and experimental method |
| CN109932272B (en) * | 2018-11-28 | 2024-03-22 | 中国华能集团有限公司 | CO (carbon monoxide) 2 Displacement experiment system and displacement experiment method |
| CN111693433A (en) * | 2020-06-08 | 2020-09-22 | 中国石油天然气股份有限公司 | Core vacuumizing and pressurizing saturated water device and method |
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