CN106525655A - Device and method for simulating oil displacement and fluid performance measurement through gas-liquid injection - Google Patents
Device and method for simulating oil displacement and fluid performance measurement through gas-liquid injection Download PDFInfo
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- 238000002347 injection Methods 0.000 title claims abstract description 161
- 239000007924 injection Substances 0.000 title claims abstract description 161
- 239000012530 fluid Substances 0.000 title claims abstract description 105
- 238000006073 displacement reaction Methods 0.000 title claims abstract description 96
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000005259 measurement Methods 0.000 title claims description 14
- 239000011435 rock Substances 0.000 claims abstract description 92
- 239000003921 oil Substances 0.000 claims abstract description 86
- 230000000007 visual effect Effects 0.000 claims abstract description 53
- 239000000203 mixture Substances 0.000 claims abstract description 10
- 239000007789 gas Substances 0.000 claims description 224
- 238000002474 experimental method Methods 0.000 claims description 93
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 24
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- 238000003556 assay Methods 0.000 claims description 12
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
- G01N11/02—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by measuring flow of the material
- G01N11/04—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by measuring flow of the material through a restricted passage, e.g. tube, aperture
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Abstract
The invention provides a device and a method for measuring gas-liquid injection simulated oil displacement and fluid performance, wherein the device comprises a model system for simulating an oil reservoir, an injection system for injecting a displacement medium into the model system, an effluent measuring and collecting system for measuring and collecting the effluent of the model system and a measuring system for acquiring the fluid performance in a rock core, and the measuring system comprises: the mass flowmeter comprises a first mass flowmeter, a first visual capillary, a second mass flowmeter and a second visual capillary. The device measures the fluid forms and the kinematic viscosities of the fluid at different positions of different layers in the rock core and after the fluid flows out of the rock core before entering the rock core, by arranging the visible capillary tube, the mass flow meter and the differential pressure sensor, is beneficial to analyzing the motion state and the velocity of the injected fluid or the injected fluid mixed with the crude oil in the stratum, and provides technical support for researching the fluid migration rule and the oil displacement mechanism; the flow rate and the flow rate of the gas, the liquid or the gas-liquid mixture fluid are accurately measured by the mass flow meter.
Description
Technical field
The invention belongs to petroleum works and Technology field, and in particular to a kind of laboratory environment that is applied to is capable of achieving gas
Liquid replaces injection or concurrently injected gas-liquid injects the device and method of imitation oil displacement experiment, and the imitation oil displacement experiment apparatus and method can also be straight
Connect the measure for realizing fluid property.
Background technology
Oil is the non-renewable energy, and it is eternal problem cost-effectively to develop existing oil field.Water drive can be improved
Recovery ratio 1/3-1/5, each elephant of China have been in the water drive later stage, but have petroleum-in-places more than half to remain on
Underground, needs to carry out effective tertiary oil recovery technology, and China's oil yield can be made to increase 10%-20%.Chemical flooding technology is
It is most widely used most ripe in tertiary oil recovery, and the quality of physical contradictions result is to judge that can chemical flooding
The Main Basiss of scene application.
At present, physical contradictions device mainly for polymer flooding, ternary composite driving or gas drive experiment need and
Feature design, and it is specifically designed for the gas-liquid physical simulation flooding test device that alternately injection is designed seldom, major part is all by the above
Plant modification, there is when gas-liquid replaces the problems such as pressure oscillation is big, and the measurement of gas flow is inaccurate.
The content of the invention
The invention aims to solve the above problems, there is provided a kind of laboratory environment that is applied to is applied to laboratory ring
Border is capable of achieving gas-liquid, and alternately injection or concurrently injected gas-liquid injection imitation oil displacement experiment and fluid property determine device.
The above-mentioned purpose of the present invention is realized by technical scheme below：
A kind of gas-liquid injection imitation oil displacement experiment and fluid property determine device, including simulation oil reservoir model system, to model
The injected system of system injection displacing medium and the effluent to model system carry out the effluent metering collection system for measuring collection
System, the model system includes the sandwiched device of rock core (A), also includes for obtaining the measurement system of fluid property in rock core, described
Measurement system includes：
First mass flowmenter (H1) and the first visual capillary tube (G5), the two is connected in series in the sandwiched device of rock core (A)
Sandwiched device entrance (A1) end of rock core, is provided with first pressure sensor (P1) at the arrival end of the first mass flowmenter (H1)；The
The arrival end of one mass flowmenter (H1) is connected to the injected system；
Second mass flowmenter (H2) and the second visual capillary tube (G6), the two is connected in series to by pneumatic operated valve (K24)
The sandwiched device of rock core of the sandwiched device of rock core (A) exports (A8), and core fluids collection point (A2-A7) passes through pneumatic operated valve respectively
(K18-K23) arrival end of the second mass flowmenter (H2) is connected to, the second mass flowmenter (H2) arrival end arranges the 5th and presses
Force transducer (P7)；The port of export of the second visual capillary tube (G6) is connected to the effluent metering collecting system.
Above-mentioned gas-liquid injection imitation oil displacement experiment and fluid property are determined in device, and the effluent metering collecting system includes the
One back-pressure valve (B1), the second back-pressure valve (B2), pneumatic operated valve (K3), pneumatic operated valve (K25) and oil-gas-water metering device (D), second can
The port of export depending on capillary tube (G6) passes sequentially through the second back-pressure valve (B2), pneumatic operated valve (K25) and is connected to oil-gas-water metering device
(D), sandwiched device outlet (A8) of the rock core of the sandwiched device of rock core (A) passes sequentially through the first back-pressure valve (B1), pneumatic operated valve (K3) and is connected to
Oil-gas-water metering device (D).
Above-mentioned gas-liquid injection imitation oil displacement experiment and fluid property are determined in device, and the first visual capillary tube (G5) is positioned at rock
The sandwiched device entrance (A1) of rock core of the sandwiched device of the heart (A) is held and is connected with pipeline, flat along the first visual capillary tube (G5) length direction
Capable side is provided with the first light source (G3), and opposite side is provided with the first high power video camera (G7), and first visual capillary tube (G5's) enters
The first differential pressure pickup (P5) is parallel with to measure between the first visual capillary tube (G5) entrance and exit between mouth and outlet
Pressure differential.
Above-mentioned gas-liquid injection imitation oil displacement experiment and fluid property are determined in device, and the second visual capillary tube (G6) is positioned at rock
Sandwiched device outlet (A8) end of the heart is connected with pipeline, is provided with the second light along the parallel side of the second visual capillary tube (G6) length direction
Source (G4), opposite side are provided with the second high power video camera (G8), are parallel between the entrance and exit of the second visual capillary tube (G6)
Second differential pressure pickup (P6).
Above-mentioned gas-liquid injection imitation oil displacement experiment and fluid property are determined in device, and the injected system includes to model system noting
The gas injection system for entering gas and the liquid injection system that liquid is injected to model system.
Above-mentioned gas-liquid injection imitation oil displacement experiment and fluid property are determined in device, and the gas injection system includes：
The first gas piston container L1 being connected in parallel and second gas piston container L2, wherein,
Pneumatic operated valve (K10) is provided with the upper end open of the first gas piston container (L1) and for measuring first gas
3rd pressure transducer (P3) of piston container (L1) internal gas pressure, the upper end open of first gas piston container (L1) lead to
Cross pneumatic operated valve (K11) to be connected with the first evacuated tube (U1)；The lower ending opening of first gas piston container (L1) passes through pneumatic operated valve
(K14) it is connected to the second constant pressure constant speed pump (R2), the 3rd Liquid acquisition container (F3) is connected to by pneumatic operated valve (K16)；
Pneumatic operated valve (K9) is provided with the upper end open of second gas piston container (L2) and for measuring second gas piston
4th pressure transducer (P4) of container (L2) internal gas pressure, the upper end open of second gas piston container (L2) pass through gas
Dynamic valve (K12) is connected with the second evacuated tube (U2)；The lower ending opening of second gas piston container (L2) passes through pneumatic operated valve (K13)
It is connected to the 3rd constant pressure constant speed pump (R3), the 3rd Liquid acquisition container (F3) is connected to by pneumatic operated valve (K17)；
For storing the gas cylinder (N) of gases at high pressure, the gas cylinder (N) is connected to a gas by pneumatic operated valve (K8)
Body booster pump (M), the gas boosting pump (M) are connected to the friendship of pneumatic operated valve (K9) and pneumatic operated valve (K10) by pneumatic operated valve (K7)
Place is met, the junction of pneumatic operated valve (K7, K9, K10) is connected to the arrival end of the first mass flowmenter (H1) by pneumatic operated valve (K6).
Above-mentioned gas-liquid injection imitation oil displacement experiment and fluid property are determined in device, and the liquid injection system includes liquid piston
Container (E), the upper end porch of the liquid piston container (E) are provided with for measuring liquid pressure in liquid piston container (E)
The second pressure sensor (P2) of power, the upper end open of liquid piston container (E) pass through pneumatic operated valve (K2) and first liquid respectively
Receptor (F1) is connected and the arrival end of the first mass flowmenter (H1) is connected to by pneumatic operated valve (K5)；The liquid piston
The lower ending opening of container (E) is connected with the first constant pressure constant speed pump (R1) by pneumatic operated valve (K4), and by pneumatic operated valve (K15) and the
Two Liquid acquisition containers (F2) are connected.
Above-mentioned gas-liquid injection imitation oil displacement experiment and fluid property are determined in device, the sandwiched device (A) of the rock core, the first back-pressure valve
(B1), the second back-pressure valve (B2), oil-gas-water metering device (D), liquid piston container (E), Liquid acquisition container (F1), the first matter
Amount effusion meter (H1), the second mass flowmenter (H2), first gas piston container (L1), second gas piston container (L2) and
First impermeable light box (G1) and the second impermeable light box (G2) are placed in calorstat (Q).
Above-mentioned gas-liquid injection imitation oil displacement experiment and fluid property are determined in device, first mass flowmenter (H1), second
Mass flowmenter (H2), pneumatic operated valve (K1-K25), each pressure transducer (P1-P4, P7), each differential pressure pickup (P4, P5), constant temperature
It is case (Q), each constant pressure constant speed pump (R1-R3), the first light source (G3), secondary light source (G4), the first high power video camera (G7), second high
Times video camera (G8), gas boosting pump M are each coupled electrically to computer (W).
The present invention also provides a kind of gas-liquid injection imitation oil displacement experiment and fluid property assay method, and the method adopts above-mentioned gas-liquid
Injection imitation oil displacement experiment and fluid property determine device and carry out gas-liquid injection imitation oil displacement experiment experiment and fluid property in rock core is entered
Row is determined, and is comprised the following steps：
Step one：Three layers of heterogeneous body saturated core are put in the sandwiched device of rock core (A), liquid loads liquid piston container
(E), in, in gas cylinder (N), gaseous species meet the design of imitation oil displacement experiment experiment, first gas piston container (L1) and
Piston in second gas piston container (L2) is located at top, and all pneumatic operated valves are in closed mode, and computer (W) control is permanent
Incubator (Q) is heated to imitation oil displacement experiment experiment preset temperature；Computer (W) controls the first light source (G3) and secondary light source (G4) is opened
Open, and control the first high power video camera (G7) and the unlatching of the second high power video camera (G8)；
Step 2：Computer (W) control pneumatic operated valve (K8, K7, K10, K16) is opened, and the gas in gas cylinder (N) passes through
Gas boosting pump (M) and pneumatic operated valve (K8, K7, K10) in first gas piston container (L1), when first gas piston container
(L1) piston in is pulled to bottom, and computer (W) control pneumatic operated valve (K10, K16) cuts out；Computer (W) controls pneumatic operated valve
(K9, K17) is opened, and the gas in gas cylinder (N) passes through booster pump (M) and pneumatic operated valve (K8, K7, K9) and lives into second gas
In plug container (L2), when the piston in second gas piston container (L2) is pulled to bottom, computer (W) control pneumatic operated valve (K8,
K7, K9, K17) close；
Step 3：The pressure value of the first back-pressure valve (B1), computer (W) are set according to the back pressure of imitation oil displacement experiment experimental design
Control pneumatic operated valve (K4, K13, K14) is opened, and computer (W) controls the first constant pressure constant speed pump (R1), the second constant pressure constant speed pump (R2)
Respectively liquid piston container (E), first gas piston container (L1), second gas piston are held with the 3rd constant pressure constant speed pump (R3)
Device (L2) pressurizes, when the pressure of second pressure sensor (P2), the 3rd pressure transducer (P3) or the 4th pressure transducer (P4)
When value is equal with the pressure value of the first back-pressure valve (B1), computer (W) controls corresponding constant pressure constant speed pump to be stopped；
Step 4：Injection mode or gas-liquid are replaced using gas-liquid while injection mode is to the oil-containing in the sandwiched device of rock core (A)
Displacement of reservoir oil medium is injected in rock core, in injection process, computer (W) is by the first high power video camera (G7) and the first light source (G3)
The flow regime of observation gas, liquid or gas-liquid mixture, in combination with the first mass flowmenter (H1) and the first pressure difference sensing
The numerical computations of device (P5) go out the kinematic viscosity of gas, liquid or gas-liquid mixture；Computer (W) controls pneumatic operated valve (K18-
K24 a unlatching in), the pressure for setting back-pressure valve (B2) are equal to the pressure value of the 5th pressure transducer (P7), by second
High power video camera (G8) three layers of heterogeneous core fluid acquisition point (A2-A7) corresponding with secondary light source (G4) Observable and rock core folder
The fluid flow state of device outlet (A8) is put, also in conjunction with the second mass flowmenter (H2) and the number of the second differential pressure pickup (P6)
Value calculates the kinematic viscosity of the collection point fluid, till meeting the injection length of imitation oil displacement experiment experimental design.
In above-mentioned gas-liquid injection imitation oil displacement experiment and fluid property assay method, the gas-liquid in step 4 is while injection mode bag
Include following steps：
Computer (W) control pneumatic operated valve (K3, K5, K6, K10) is opened, and computer (W) controls the first constant pressure constant speed pump
(R1), the second constant pressure constant speed pump (R2) injects liquids and gases with the gas liquid ratio of imitation oil displacement experiment experimental design, injection rate, when full
After the injection length of sufficient imitation oil displacement experiment experimental design, computer (W) control pneumatic operated valve (K3, K5, K6, K10) cuts out and stops the
One constant pressure constant speed pump (R1) and the second constant pressure constant speed pump (R2)；First pressure sensor is recorded in experimentation Computer (W)
(P1) pressure value and the flow velocity and injection length of the first mass flowmenter (H1) aerated fluid, and real time record oil-gas-water metering
Oil, gas and water volume in device (D).
In above-mentioned gas-liquid injection imitation oil displacement experiment and fluid property assay method, the gas-liquid in step 4 replaces injection mode bag
Include following steps alternately：
(1) when injecting liquid, computer (W) control pneumatic operated valve (K3, K4, K5) is opened, and computer (W) controls the first constant pressure
Constant speed pump (R1) injects liquid with the speed of constant imitation oil displacement experiment experimental design, when the injection for meeting imitation oil displacement experiment experimental design
After time, computer (W) control pneumatic operated valve (K5) cuts out, and stops the first constant pressure constant speed pump (R1)；Computer (W) is while record
The value of first pressure sensor (P1), liquid injection length and speed when liquid injects, by the first mass flowmenter (H1)
The injection rate that the liquid injection rate correction of measurement is recorded by the first constant pressure constant speed pump (R1)；
In injection liquid process, computer (W) is opened while controlling pneumatic operated valve (K13, K14), and is respectively compared the 3rd
The size of the pressure value of pressure transducer (P3), the pressure value of the 4th pressure transducer (P4) and first pressure sensor (P1),
I.e. when the pressure value of the 3rd pressure transducer (P3) is more than the pressure value of first pressure sensor (P1), computer (W) control
Pneumatic operated valve (K11) is opened, and gas is discharged from the first evacuated tube (U1), until the pressure value of the 3rd pressure transducer (P3) is equal to the
Till the pressure value of one pressure transducer (P1), pneumatic operated valve (K11) is closed；When the pressure value of the 3rd pressure transducer (P3) is less than
During the pressure value of first pressure sensor (P1), computer (W) controls the second constant pressure constant speed pump (R2) to be held to first gas piston
Device (L1) pressurizes, till the pressure value of the 3rd pressure transducer (P3) is equal to the pressure value of first pressure sensor (P1),
Stop the pressurization of the second constant pressure constant speed pump (R2)；Equally, when the pressure value of the 4th pressure transducer (P4) is sensed more than first pressure
The pressure value of device (P1), computer (W) control pneumatic operated valve (K12) are opened, and gas is discharged from the second evacuated tube (U2), until the 4th
Till the pressure value of pressure transducer (P4) is equal to the pressure value of first pressure sensor (P1), pneumatic operated valve (K12) is closed；When
When the pressure value of four pressure transducers (P4) is less than the pressure value of first pressure sensor (P1), computer (W) control the 3rd is permanent
Pressure constant speed pump (R3) is pressurizeed to second gas piston container (L2), until the pressure value of the 4th pressure transducer (P4) is equal to first
Till the pressure value of pressure transducer (P1), stop the pressurization of the 3rd constant pressure constant speed pump (R3), until liquid injection is finished；
(2) when injecting gas, computer (W) control pneumatic operated valve (K3, K6, K10) is opened, and computer (W) control second is permanent
Pressure constant speed pump (R2) injects gas with the speed of imitation oil displacement experiment experimental design, when the injection length for meeting imitation oil displacement experiment experimental design
Afterwards, computer (W) control pneumatic operated valve (K6, K10) cuts out and stops the second constant pressure constant speed pump (R2)；Computer (W) records gas
The value of the first pressure sensor (P1) during injection, gas injection rate and time, measured by the first mass flowmenter (H1)
The injection rate that recorded by the second constant pressure constant speed pump (R2) of gas injection rate correction；
In injection gas process, computer (W) compares the pressure value of the 4th pressure transducer (P4) and first pressure is passed
The size of the pressure value of sensor (P1), when the pressure value of the 4th pressure transducer (P4) is more than the pressure of first pressure sensor (P1)
Force value, computer (W) control pneumatic operated valve (K12) are opened, and gas is discharged from the second evacuated tube (U2), until the 4th pressure transducer
(P4), till pressure value is equal to the pressure value of first pressure sensor (P1), close pneumatic operated valve (K12)；When the 4th pressure sensing
Pressure value of the pressure value of device (P4) less than first pressure sensor (P1), computer (W) control the 3rd constant pressure constant speed pump (R3)
Second gas piston container (L2) are pressurizeed, until the pressure value of the 4th pressure transducer (P4) is equal to first pressure sensor
(P1) till pressure value, stop the pressurization of the 3rd constant pressure constant speed pump (R3), until gas injection is finished, or work as first gas piston
When in container (L1), gas volume is finished, computer (W) control pneumatic operated valve (K9) is opened, and control pneumatic operated valve (K10) is closed and stopped
Only the second constant pressure constant speed pump (R2), computer (W) control the 3rd constant pressure constant speed pump (R3) with same imitation oil displacement experiment experimental design
Speed continue injection gas, after the injection length of imitation oil displacement experiment experimental design is met, computer W control pneumatic operated valve (K6,
K9) close and stop the 3rd constant pressure constant speed pump (R3)；
In injection gas process, computer (W) is while compare the pressure value and the first pressure of second pressure sensor (P2)
The size of the pressure value of force transducer (P1), when the pressure value of second pressure sensor (P2) is more than first pressure sensor (P1)
Pressure value when, computer (W) control pneumatic operated valve (K2) is opened, and discharges surplus liquid in first liquid reception container (F1),
Till the pressure value of second pressure sensor (P2) is equal to the pressure value of first pressure sensor (P1), pneumatic operated valve is closed
(K2)；When the pressure value of second pressure sensor (P2) is less than the pressure value of first pressure sensor (P1), computer (W) control
First constant pressure constant speed pump (R1) pressurizes to liquid piston container (E), until the pressure value of second pressure sensor (P2) is equal to the
Till the pressure value of one pressure transducer (P1), stop the first constant pressure constant speed pump (R1), until gas injection is finished.
Using above-mentioned technical proposal, the solution have the advantages that：Apparatus of the present invention are by arranging visual capillary tube, quality
Effusion meter and differential pressure pickup, considerable fluid measured different layers position diverse location and outflow rock before into rock core, in rock core
Flow morphology and kinematic viscosity after the heart, is directly realized by the measure of fluid property while imitation oil displacement experiment, contributes to analysis note
Enter fluid or inject the kinestate and speed after fluid is mixed with crude oil in the earth formation, be Study of Fluid migration rule and the displacement of reservoir oil
Mechanism provides technical support；By second, third constant speed and constant pressure pump real-time control first gas piston container, second gas piston
The pressure of gas is injected in container, the pressure and rock of gas in making first gas piston container, second gas piston container, is injected
The sandwiched device inlet charge pressures of the heart are identical, and in realizing gas-liquid injection process, gas injection pressure is steady, and control accuracy is high；Pass through
The pressure of liquid is injected in first constant speed and constant pressure pump real-time control liquid piston container, in making liquid piston container, liquid is injected
Pressure is identical with the sandwiched device inlet charge pressures of rock core, and in realizing gas-liquid injection process, liquid injection pressure is steady, control essence
Degree is high；By the flow velocity and flow of the accurate meter gaseous of mass flowmenter, liquid or gas-liquid mixture fluid.
Description of the drawings
Fig. 1 is the overall structure diagram of the present invention.
In figure, reference is expressed as：
A：The sandwiched device of rock core, A1：The sandwiched device entrance of rock core, A8：The sandwiched device outlet of rock core.A2-A7：Core fluids are gathered
Point；
B1：First back-pressure valve, B2：Second back-pressure valve；D：Oil-gas-water metering device；G1：First light tight seal box, G2：
Second light tight seal box；G3：First light source, G4：Secondary light source；G5：First visual capillary tube, G6：Second visual capillary tube；
G7：First high power video camera, G8：Second high power video camera；H1：First mass flowmenter, H2：Second mass flowmenter；
E：Liquid piston container；F1：First liquid receptor, F2：Second liquid receptor, F3：3rd liquid receiver；
K1-K25：Pneumatic operated valve；L1：First gas piston container, L2：Second gas piston container；M：Gas boosting pump；N：High pressure gas
Bottle；U1：First evacuated tube, U2：Second evacuated tube；P1：First pressure sensor, P2：Second pressure sensor, P3：3rd pressure
Force transducer, P4：4th pressure transducer；P5：First differential pressure pickup, P6：Second differential pressure pickup；P7：5th pressure is passed
Sensor；Q：Calorstat；
R1：First constant pressure constant speed pump, R2：Second constant pressure constant speed pump, R3：3rd constant pressure constant speed pump；W：Computer.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, device is determined to the gas-liquid injection imitation oil displacement experiment and fluid property of the present invention
And method is described in detail.
Gas-liquid injects imitation oil displacement experiment and fluid property determines device
As shown in figure 1, the gas-liquid injection imitation oil displacement experiment and fluid property for the present invention determines the embodiment of device, the device
It is a kind of simulation suitable for laboratory environment and determines device (thick line represents that physical pipeline connects, and fine rule represents electrical connection),
Model system including simulation oil reservoir, the gas injection system of gas is injected to model system, liquid is injected to model system
Liquid injection system, the effluent to model system carry out the effluent metering collecting system for measuring collection and for obtaining rock
The measurement system of fluid property in the heart, wherein：
Model system in the present embodiment is that the sandwiched device A of rock core is used to make the core sample and work of different oil bearing grades
To place the container of sample, it is with the sandwiched device of rock core being connected with gas injection system, liquid injection system, measurement system
The sandwiched device of rock core that entrance A1 is connected with measurement system exports A8.The rock core being placed in the sandwiched device A of rock core is three layers of upper, middle and lower
Heterogeneous core, three layers of heterogeneous core share the sandwiched device entrance A1 injections fluid of same rock core, the sandwiched device outlet of same rock core
A8 produces fluid, and three layers of per layer of heterogeneous core of upper, middle and lower are arranging rock positioned at 1/3rd positions of rock core length direction respectively
Heart fluid acquisition point A2-A7, for support study dies fluid migration rule and mechanism of oil displacement.
Gas injection system in the present embodiment is included for storing the gas cylinder N of gases at high pressure and being connected in parallel
First gas piston container L1 and second gas piston container L2, is provided with the 3rd at the upper end open of first gas piston container L1
Pressure transducer P3, for measuring the gas pressure inside first gas piston container L1；First gas piston container L1's is upper
End opening is connected with the first evacuated tube U1 by pneumatic operated valve K11, for discharging gas, is reduced in first gas piston container L1
The pressure of gas；Pneumatic operated valve K10 is additionally provided with the upper end open of first gas piston container L1, for controlling first gas piston
The connection of container L1 and miscellaneous part；Second is connected to by pneumatic operated valve K14 at the lower ending opening of first gas piston container L1
Constant pressure constant speed pump R2, the 3rd Liquid acquisition container F 3 is connected to by pneumatic operated valve K16, the 3rd Liquid acquisition container F 3 is used to receive
The liquid of piston lower portion in first, second gas piston container, can make gas piston container be filled with gases at high pressure.
In the same manner, the 4th pressure transducer P4 is provided with the upper end open of second gas piston container L2, for measurement second
Gas pressure inside gas piston container L2；The upper end open of second gas piston container L2 passes through pneumatic operated valve K12 and second
Evacuated tube U2 is connected, and for discharging gas, reduces the pressure of gas in second gas piston container L2；Second gas piston holds
Pneumatic operated valve K9 is additionally provided with the upper end open of device L2, for controlling the connection of second gas piston container L2 and miscellaneous part；The
The lower ending opening of two gas piston container L2 is connected to the 3rd constant pressure constant speed pump R3 by pneumatic operated valve K13, is connected by pneumatic operated valve K17
Be connected to the 3rd Liquid acquisition container F 3, the 3rd constant pressure constant speed pump R3 be used to controlling in second gas piston container L2 gas flow rate and
Pressure.
Gas cylinder N is connected to a gas boosting pump M by pneumatic operated valve K8, and gas boosting pump M is used to improve gas pressure,
Which passes through the junction that pneumatic operated valve K7 is connected to pneumatic operated valve K9 and pneumatic operated valve K10, and the junction of pneumatic operated valve K7, K9, K10 passes through gas
Dynamic valve K6 is connected to the arrival end of the first mass flowmenter H1.
Liquid injection system in the present embodiment includes liquid piston container E, the upper end porch of liquid piston container E
Second pressure sensor P2 is provided with, for measuring the pressure of liquid in liquid piston container E, the upper end of liquid piston container E
Opening is connected with first liquid receptor F1 by pneumatic operated valve K2 respectively and is connected to the first mass flow by pneumatic operated valve K5
The arrival end of meter H1, first liquid receptor F1 are used to receive the liquid in liquid piston container E.Under liquid piston container E
End opening is connected with the first constant pressure constant speed pump R1 by pneumatic operated valve K4, receives 2 phase of container F by pneumatic operated valve K15 and second liquid
Connect, wherein, the flow velocity and pressure of liquid in the first constant pressure constant speed pump R1 control liquid piston container E, second liquid receive container
F2 receives the liquid of piston lower portion in liquid piston container E.
Measurement system in the present embodiment includes the first mass flowmenter H1, the second mass flowmenter H2, the first visual hair
Tubule G5 and the second visual capillary tube G6, wherein, the first mass flowmenter H1 and the first visual capillary tube G5 are connected in series in rock
The sandwiched device entrance A1 ends of rock core of the sandwiched device A of the heart, are provided with first pressure sensor at the arrival end of the first mass flowmenter H1
P1, the arrival end of the first mass flowmenter H1 are connected to gas injection system and liquid injection system, for measure injection gas,
The flow velocity of liquid or gas-liquid mixture, first pressure sensor P1 measure the pressure of the first mass flowmenter H1 arrival ends；Second
Mass flowmenter H2 and the second visual capillary tube G6 are connected in series to the sandwiched device of rock core of the sandwiched device A of rock core by pneumatic operated valve K24
Outlet A8, and core fluids collection point A2-A7 is connected to entering for the second mass flowmenter H2 by pneumatic operated valve K18-K23 respectively
Mouth end, the second mass flowmenter H2 arrival ends arrange the 5th pressure transducer P7, and the second mass flowmenter H2 is used to measure rock core
The flow velocity of gas, liquid or gas-liquid mixture that fluid acquisition point flows out.The port of export of the second visual capillary tube G6 is connected to stream
Go out liquid metering collecting system.
First visual capillary tube G5 is located at the sandwiched device entrance A1 of rock core of the sandwiched device A of rock core (the visual hair that is connected with pipeline
Tubule is not enclosed within pipeline, and he is single equipment, is connected with pipeline), along the first visual capillary tube G5 length directions
Parallel side is provided with the first light source G3, and opposite side is provided with the first high power video camera G7, the entrance of the first visual capillary tube G5 and
The first differential pressure pickup P5 is parallel between outlet, for measuring the pressure between the first visual capillary tube G5 entrance and exits
Difference, the first visual capillary tube G5, the first light source G3, the first high power video camera G7 and the first differential pressure pickup P5 are placed in first
In the casing of light tight seal box G1, it is therefore an objective to avoid ambient from disturbing, shoot video camera and become apparent from stable, holding temperature
Degree is constant, improves certainty of measurement；Equally, the second visual capillary tube G6 is located at the sandwiched device outlet A8 sides of rock core and is connected with pipeline, edge
The parallel side of second visual capillary tube G6 length directions is provided with secondary light source G4, and opposite side is provided with the second high power video camera G8,
It is parallel with the second differential pressure pickup P6 between the entrance and exit of the second visual capillary tube G6, the second visual capillary tube G6, second
Light source G4, the second high power video camera G8 and the second differential pressure pickup P6 are in light tight seal case G2.
Effluent metering collecting system in the present embodiment include the first back-pressure valve B1, the second back-pressure valve B2, pneumatic operated valve K3,
The port of export of pneumatic operated valve K25 and oil-gas-water metering device D, the second visual capillary tube G6 passes sequentially through the second back-pressure valve B2, pneumatic
Valve K25 is connected to oil-gas-water metering device D, the sandwiched device outlet A8 of rock core of the sandwiched device A of rock core pass sequentially through the first back-pressure valve B1,
Pneumatic operated valve K3 be connected to oil-gas-water metering device D, the first back-pressure valve B1 and the second back-pressure valve B2 be respectively used to control rock core it is sandwiched
Device exports the outlet pressure of A8 and the second visual capillary tube G6, and oil-gas-water metering device D is used to measure different time oil, gas and water
Volume withdrawl.
The sandwiched device A of rock core, the first back-pressure valve B1, the second back-pressure valve B2, oil-gas-water metering device D, liquid piston container E,
Liquid acquisition container F 1, the first mass flowmenter H1, the second mass flowmenter H2, first gas piston container L1, second gas
Piston container L2 and the first impermeable light box G1 and the second impermeable light box G2 are placed in calorstat Q, it is therefore an objective to which holding was tested
Fluid temperature (F.T.) is injected in journey constant, improve experimental precision, oven heat temperature range is 25 DEG C -200 DEG C.And other parts are not
It is, in order to prevent Aging equipment, to improve device longevity and safety in being put into calorstat Q.
First mass flowmenter H1, the second mass flowmenter H2, pneumatic operated valve K1-K25, each pressure transducer P1-P6, constant temperature
Case Q, each constant pressure constant speed pump R1-R3, the first light source G3, secondary light source G4, the first high power video camera G7, the second high power video camera
G8, gas boosting pump M are each coupled electrically to computer W, gathered the data of corresponding component, are set the ginseng of corresponding component by computer W
The execution of number and control corresponding component.
Each part is determined according to the gas-liquid injection imitation oil displacement experiment and fluid property that above-mentioned annexation forms the present invention above
Device, touches the equal acid and alkali-resistance of the pipeline of each part and connecting components of gas medium and/or liquid medium in the device
Corrosion, and resistance to it is pressed in more than 50MPa；First mass flowmenter H1 and the second mass flowmenter H2 may be selected Fox's POLO company
Product, the mass flow of the measurable gas phase of the product, liquid phase and gas-liquid two-phase, the first visual capillary tube G5 and the second visual hair
Tubule G6 can be sapphire material, more than 200 DEG C of pressure more than 50MPa, heatproof；First gas piston container L1 and second gas
Piston container L2 volumes are 2000mL or 3000mL, are selected according to the rock pore volume in the sandwiched device of rock core, rock core hole
Volume is less than 200mL, and from 2000mL, rock pore volume is more than 200mL, and from 3000mL, liquid piston container E volumes are
500mL or 1000mL, selectes according to the rock pore volume in the sandwiched device of rock core, and rock pore volume is less than 200mL, selects
500mL, rock pore volume are more than 200mL, from 1000mL.
Gas-liquid injects imitation oil displacement experiment and fluid property assay method
Gas-liquid injection imitation oil displacement experiment experiment can be carried out using said apparatus and fluid property in rock core is measured,
Specific gas-liquid injection imitation oil displacement experiment and fluid property assay method are comprised the following steps：
Step one：Three layers of heterogeneous body saturated core are put in the sandwiched device A of rock core, liquid loads in liquid piston container E,
In gas cylinder N, gaseous species meet the design of experiment, in first gas piston container L1 and second gas piston container L2
Piston is located at top, and all pneumatic operated valves are in closed mode, and computer W control calorstat Q are heated to testing preset temperature；Meter
Calculation machine W controls the first light source G3 and secondary light source G4 and opens, and controls the first high power video camera G7 and the second high power video camera G8
Open and record the image (to obtain the flow regime of fluid) of capillary tube fluid in whole experiment process.
Step 2：Computer W control pneumatic operated valve K8, K7, K10, K16 are opened, and the gas in gas cylinder N is increased by gas
Press pump M and pneumatic operated valve K8, K7, K10 are entered in first gas piston container L1, the piston quilt in first gas piston container L1
Shift bottom onto, computer W control pneumatic operated valve K10, K16 are closed；Computer W control pneumatic operated valve K9, K17 are opened, in gas cylinder N
Gas pass through booster pump M and pneumatic operated valve K8, K7, K9 in second gas piston container L2, when second gas piston container
Piston in L2 is pulled to bottom, and computer W control pneumatic operated valve K8, K7, K9, K17 are closed.
Step 3：The pressure value of the first back-pressure valve B1, computer W controls are set according to the back pressure of imitation oil displacement experiment experimental design
Pneumatic operated valve K4, K13, K14 are opened, and computer W controls the first constant pressure constant speed pump R1, the second constant pressure constant speed pump R2 and the 3rd constant pressure and constant
Fast pump R3 is pressurizeed to liquid piston container E, first gas piston container L1, second gas piston container L2 respectively, when the second pressure
The pressure value phase of force transducer P2, the pressure value of the 3rd pressure transducer P3 or the 4th pressure transducer P4 and the first back-pressure valve B1
Deng when, computer W controls corresponding constant pressure constant speed pump to be stopped.
4th step：Using gas-liquid replace injection mode or gas-liquid simultaneously injection mode in the sandwiched device A of rock core containing oil rock
Displacement of reservoir oil medium is injected in the heart, in injection process, computer W passes through the first high power video camera G7 and the first light source G3 and observes gas
The flow regime of body, liquid or gas-liquid mixture, in combination with the first mass flowmenter H1 numerical value (fluid stream entered before rock core
Speed) and the first differential pressure pickup P5 numerical value (differential pressures at the first visual capillary tube G5 two ends) to calculate gas, liquid or gas-liquid mixed
The kinematic viscosity of compound；A unlatching in computer W control pneumatic operated valve K18-K24, the pressure for setting back-pressure valve B2 are equal to the
The pressure value (flowing out the pressure after rock core in the A2-A7 of core fluids collection point at arbitrary collection point) of five pressure transducer P7, leads to
Cross the second high power video camera G8 three layer heterogeneous core fluid acquisition point A2-A7s corresponding with secondary light source G4 observations and rock core is sandwiched
Device exports the fluid flow state of A8, and measuring when the sandwiched device of rock core exports the fluid properties of A8 needs to close pneumatic operated valve K3, equally
With reference to the second mass flowmenter H2 (flowing out the rate of flow of fluid after rock core) and second differential pressure pickup P6 numerical value (the second visual capillary
The differential pressure at pipe G6 two ends) kinematic viscosity of the collection point fluid is calculated, when meeting the injection of imitation oil displacement experiment experimental design
Between till.
Injection mode is comprised the following steps gas-liquid in step 4 simultaneously：
Computer W control pneumatic operated valve K3, K5, K6, K10 is opened, and computer W controls the first constant pressure constant speed pump R1, second permanent
Pressure constant speed pump R2 with the gas liquid ratio of imitation oil displacement experiment experimental design, injection rate injection liquids and gases, when meeting imitation oil displacement experiment reality
After testing the injection length of design, computer W control pneumatic operated valve K3, K5, K6, K10 close and stop the first constant pressure constant speed pump R1 and
Second constant pressure constant speed pump R2；The pressure value and the first quality stream of first pressure sensor P1 are recorded in experimentation Computer W
Oil gas water volume in the flow velocity and injection length of gauge H1 aerated fluids, and real time record oil-gas-water metering device D.
In step 4, gas-liquid alternating injection mode includes following steps alternately：
(1), when injecting liquid, computer W control pneumatic operated valve K3, K4, K5 are opened, and computer W controls the first constant pressure constant speed pump
R1 injects liquid with the speed of constant imitation oil displacement experiment experimental design, after the injection length of imitation oil displacement experiment experimental design is met,
Imitation oil displacement experiment computer W control pneumatic operated valve K5 are closed, are stopped the first constant pressure constant speed pump R1；Computer W recording liquid injections simultaneously
When the value of first pressure sensor P1, liquid injection length and speed (injection rate=injection length × injection rate), calculate
Injection speed of the machine W by the liquid injection rate correction of the first mass flowmenter H1 measurements by the first constant pressure constant speed pump R1 records
Degree, it is ensured that injection rate it is accurate.
In injection liquid process, computer W controls pneumatic operated valve K13, K14 simultaneously and opens, and is respectively compared the 3rd pressure
The size of the pressure value of sensor P3, the pressure value of the 4th pressure transducer P4 and first pressure sensor P1, i.e., when the 3rd pressure
When the pressure value of force transducer P3 is more than the pressure value of first pressure sensor P1, computer W control pneumatic operated valve K11 are opened, gas
Body is discharged from the first evacuated tube U1, until the pressure value of the 3rd pressure transducer P3 is equal to the pressure value of first pressure sensor P1
Till, close pneumatic operated valve K11；When the pressure value of the 3rd pressure transducer P3 is less than the pressure value of first pressure sensor P1,
Computer W controls the second constant pressure constant speed pump R2 and first gas piston container L1 is pressurizeed, until the pressure of the 3rd pressure transducer P3
Till pressure value of the force value equal to first pressure sensor P1, stop the second constant pressure constant speed pump R2 pressurizations；Equally, when the 4th pressure
Pressure value of the pressure value of sensor P4 more than first pressure sensor P1, computer W control pneumatic operated valve K12 are opened, gas from
Second evacuated tube U2 is discharged, until the pressure value of the 4th pressure transducer P4 equal to the pressure value of first pressure sensor P1 is
Only, close pneumatic operated valve K12；When the pressure value of the 4th pressure transducer P4 is less than the pressure value of first pressure sensor P1, meter
Calculation machine W controls the 3rd constant pressure constant speed pump R3 and second gas piston container L2 is pressurizeed, until the pressure of the 4th pressure transducer P4
Till pressure value of the value equal to first pressure sensor P1, stop the 3rd constant pressure constant speed pump R3 pressurizations, until liquid injection is finished.
(2), when injecting gas, computer W control pneumatic operated valve K3, K6, K10 are opened, and computer W controls the second constant pressure constant speed
Pump R2 is with the speed injection gas of imitation oil displacement experiment experimental design, after the injection length of imitation oil displacement experiment experimental design is met, simulation
The displacement of reservoir oil computer W control pneumatic operated valve K6, K10 are closed and are stopped the second constant pressure constant speed pump R2；When computer W record gases inject
The value of first pressure sensor P1, gas injection rate and time, gases of the computer W by the first mass flowmenter H1 measurements
Injection rate correction by the second constant pressure constant speed pump R2 record injection rate, it is ensured that injection rate it is accurate.
In injection gas process, computer W compares the pressure value and first pressure sensor of the 4th pressure transducer P4
The size of the pressure value of P1, when the pressure value of the 4th pressure transducer P4 is more than the pressure value of first pressure sensor P1, calculates
Machine W control pneumatic operated valve K12 are opened, and gas is discharged from the second evacuated tube U2, until the pressure value of the 4th pressure transducer P4 is equal to
Till the pressure value of first pressure sensor P1, pneumatic operated valve K12 is closed；When the pressure value of the 4th pressure transducer P4 is less than first
The pressure value of pressure transducer P1, computer W control the 3rd constant pressure constant speed pump R3 and second gas piston container L2 are pressurizeed, until
Till pressure value of the pressure value of the 4th pressure transducer P4 equal to first pressure sensor P1, stop the 3rd constant pressure constant speed pump R3
Pressurization, until gas injection is finished, or when in first gas piston container L1, gas volume is finished, computer W controls are pneumatic
Valve K9 is opened, and control pneumatic operated valve K10 closes and stop the second constant pressure constant speed pump R2, and computer W controls the 3rd constant pressure constant speed pump R3
Injection gas is continued with same imitation oil displacement experiment requirement of experiment speed, when injection gas time meets imitation oil displacement experiment requirement of experiment
Afterwards, computer W Pneumatic automatic-controls valve K6, K9 is closed and is stopped the 3rd constant pressure constant speed pump R3.
In injection gas process, computer W compares the pressure value of second pressure sensor P2 simultaneously and first pressure is passed
The size of the pressure value of sensor P1, when the pressure value of second pressure sensor P2 is more than the pressure value of first pressure sensor P1
When, computer W control pneumatic operated valve K2 are opened, and are discharged surplus liquid and are received in container F 1 to first liquid, until second pressure is passed
Till pressure value of the pressure value of sensor P2 equal to first pressure sensor P1, pneumatic operated valve K2 is closed；When second pressure sensor
Pressure value of the pressure value of P2 less than first pressure sensor P1, computer W control the first constant pressure constant speed pump R1 to liquid piston
Container E pressurizes, and till the pressure value of the pressure value equal to first pressure sensor P1 of second pressure sensor P2, stops the
One constant pressure constant speed pump R1, until gas injection is finished.
When in gas-liquid injection imitation oil displacement experiment and fluid property assay method, gas-liquid is alternately injected, core entry pressure is steady, stream
Speed is constant, occurs without fluctuation.Mass flowmenter can measure the flow velocity of minimum gas, liquid, gas-liquid mixture.
Gas-liquid injects the fluid property parameter obtained in imitation oil displacement experiment and fluid property assay method to be included：Fluid state
(being recorded by the first high power video camera G7 in above-mentioned steps four and the second high power video camera G8), rate of flow of fluid (in step 4 by
First mass flowmenter H1 and the second mass flowmenter H2 record), fluid kinematic viscosity (in step 4 with following formulas calculating
Obtain), pressure (first pressure sensor P1 and the 5th pressure transducer P7 record).
Kinematic viscosity is calculated by formula Poiseuille law.Fluid kinematic viscosity computing formula is：
In formula, μ is fluid viscosity, and flows of the Q for fluid, L are the length of visual capillary tube, and r is the half of visual capillary tube
Footpath, △ P are the differential pressure at visual capillary tube two ends, and K is visual capillary constant.
Gas-liquid injects imitation oil displacement experiment and fluid property assay method can obtain the injection liquid fluidity of the sandwiched device of rock core
Matter and the dynamic property of outlet liquid stream.The sandwiched device of rock core can determine same in six fluid acquisition points of upper, middle and lower three-layer set A2-A7
The property of one layer of position diverse location fluid, the property of different layers position same position fluid.Fluid can be determined different in rock core
Position, the fluid properties of layer position.If rock core oil-containing, impact of the oil to diverse location fluid property can be determined.
The fluid property data of above-mentioned acquisition can be used for the research (referring to experimental verification part) of mechanism of oil displacement.
In addition, if experiment also has other particular/special requirements, injection flow process can be adjusted, to meet experiment according to practical situation
Require.
Experimental verification
45 DEG C of experimental temperature, layers permeability in rock core upper, middle and lower is respectively 200,800,1000md, rock pore volume is
256mL, oil saturation are 71%；Experimental design back pressure is 5MPa, and gas-liquid is while inject, gas liquid ratio is 1:1, carbon dioxide gass
Body injection rate 0.9mL/min, foaming agent injection rate 0.9mL/min, injection length 72min, foaming agent are consisted of：Sulfo group is sweet
0.2wt%, partially hydrolyzed polyacrylamide (PHPA) (molecular weight are pressed in dish alkali silicon surface active agent 0.5wt%, dodecyl dimethyl oxidation
For 16,600,000, degree of hydrolysis is 23%) 0.1wt%, balance of water.The length of the first visual capillary tube G5, the second visual capillary tube G6
Spend for 80cm, internal diameter is 1mm, visual capillary constant K is 0.756.
1 imitation oil displacement experiment experiment parameter table of table
Analysis fluid different time, the flow regime of diverse location and viscosity parameter in rock core are carried for analysis mechanism of oil displacement
For foundation.A4 is changed over, great changes will take place for A7 collection points fluid viscosity, and observes containing oil whip, illustrate at this 2 points
Position oil nearby near formation of foam effective displacement, and this 2 points of positions out, is illustrated foam in medium to high permeable by displacement
Layer defines effective displacement.In injection 40min, A2 collection points viscosity is relatively low, observes on a small quantity containing oil whip, shows less permeable layer
Foam does not form effective displacement, needs to take other displacement methods again to improve the displacement efficiency of less permeable layer.In injection
70min, A8 collection point viscosity is relatively low, and only observes and contain on a small quantity oil whip, show foaming agent adsorption losses in rock core it is larger,
Foam oil resistivity is poor, needs to improve the oil resistivity and injection length of foaming agent.
It will be appreciated by those skilled in the art that these embodiments or embodiment are merely to illustrate the present invention and do not limit this
The scope of invention, the various equivalent variations and modification made to the present invention belong to the disclosure of invention.
Claims (12)
1. a kind of gas-liquid injection imitation oil displacement experiment and fluid property determine device, including simulation oil reservoir model system, to model system
The injected system of system injection displacing medium and the effluent to model system carry out measuring the effluent metering collecting system of collection,
The model system includes the sandwiched device of rock core (A), it is characterised in that also include for obtaining the measure system of fluid property in rock core
System, the measurement system include：
First mass flowmenter (H1) and the first visual capillary tube (G5), the two is connected in series in the rock core of the sandwiched device of rock core (A)
Sandwiched device entrance (A1) end, is provided with first pressure sensor (P1) at the arrival end of the first mass flowmenter (H1)；First matter
The arrival end of amount effusion meter (H1) is connected to the injected system；
Second mass flowmenter (H2) and the second visual capillary tube (G6), the two is connected in series to rock core by pneumatic operated valve (K24)
The sandwiched device of rock core of sandwiched device (A) exports (A8), and core fluids collection point (A2-A7) passes through pneumatic operated valve (K18- respectively
K23 the arrival end of the second mass flowmenter (H2)) is connected to, the second mass flowmenter (H2) arrival end arranges the 5th pressure sensing
Device (P7)；The port of export of the second visual capillary tube (G6) is connected to the effluent metering collecting system.
2. gas-liquid injection imitation oil displacement experiment according to claim 1 and fluid property determine device, it is characterised in that the stream
Going out liquid metering collecting system includes the first back-pressure valve (B1), the second back-pressure valve (B2), pneumatic operated valve (K3), pneumatic operated valve (K25) and oil
Air water metering device (D), the port of export of the second visual capillary tube (G6) pass sequentially through the second back-pressure valve (B2), pneumatic operated valve (K25)
Oil-gas-water metering device (D) is connected to, sandwiched device outlet (A8) of rock core of the sandwiched device of rock core (A) passes sequentially through the first back-pressure valve
(B1), pneumatic operated valve (K3) is connected to oil-gas-water metering device (D).
3. gas-liquid according to claim 2 injection imitation oil displacement experiment and fluid property determine device, it is characterised in that described the
One visual capillary tube (G5) is connected positioned at sandwiched device entrance (A1) end of rock core of the sandwiched device of rock core (A) and with pipeline, can along first
The first light source (G3) is provided with depending on the parallel side of capillary tube (G5) length direction, opposite side is provided with the first high power video camera (G7),
The first differential pressure pickup (P5) is parallel with to measure the first visual hair between the entrance and exit of the first visual capillary tube (G5)
Pressure differential between tubule (G5) entrance and exit.
4. the gas-liquid injection imitation oil displacement experiment and fluid property according to Claims 2 or 3 determines device, it is characterised in that institute
State the second visual capillary tube (G6) to be connected with pipeline positioned at sandwiched device outlet (A8) end of rock core, it is long along the second visual capillary tube (G6)
The parallel side in degree direction is provided with secondary light source (G4), and opposite side is provided with the second high power video camera (G8), the second visual capillary tube
(G6) the second differential pressure pickup (P6) is parallel between entrance and exit.
5. gas-liquid injection imitation oil displacement experiment according to claim 4 and fluid property determine device, it is characterised in that the note
Entering system includes gas injection system and the liquid injection system to model system injection liquid to model system injection gas.
6. gas-liquid injection imitation oil displacement experiment according to claim 5 and fluid property determine device, it is characterised in that the gas
Body injected system includes：
The first gas piston container L1 being connected in parallel and second gas piston container L2, wherein,
Pneumatic operated valve (K10) is provided with the upper end open of the first gas piston container (L1) and for measuring first gas piston
3rd pressure transducer (P3) of container (L1) internal gas pressure, the upper end open of first gas piston container (L1) pass through gas
Dynamic valve (K11) is connected with the first evacuated tube (U1)；The lower ending opening of first gas piston container (L1) passes through pneumatic operated valve (K14)
It is connected to the second constant pressure constant speed pump (R2), the 3rd Liquid acquisition container (F3) is connected to by pneumatic operated valve (K16)；
Pneumatic operated valve (K9) is provided with the upper end open of second gas piston container (L2) and for measuring second gas piston container
(L2) the 4th pressure transducer (P4) of internal gas pressure, the upper end open of second gas piston container (L2) pass through pneumatic operated valve
(K12) it is connected with the second evacuated tube (U2)；The lower ending opening of second gas piston container (L2) is connected by pneumatic operated valve (K13)
The 3rd Liquid acquisition container (F3) is connected to the 3rd constant pressure constant speed pump (R3), by pneumatic operated valve (K17)；
For storing the gas cylinder (N) of gases at high pressure, the gas cylinder (N) is connected to gas increasing by pneumatic operated valve (K8)
Press pump (M), the gas boosting pump (M) are connected to the junction of pneumatic operated valve (K9) and pneumatic operated valve (K10) by pneumatic operated valve (K7),
The junction of pneumatic operated valve (K7, K9, K10) is connected to the arrival end of the first mass flowmenter (H1) by pneumatic operated valve (K6).
7. gas-liquid injection imitation oil displacement experiment according to claim 5 and fluid property determine device, it is characterised in that the liquid
Body injected system includes liquid piston container (E), and the upper end porch of the liquid piston container (E) is provided with for measuring liquid
The second pressure sensor (P2) of fluid pressure in body piston container (E), the upper end open of liquid piston container (E) pass through respectively
Pneumatic operated valve (K2) is connected with first liquid receptor (F1) and is connected to the first mass flowmenter (H1) by pneumatic operated valve (K5)
Arrival end；The lower ending opening of the liquid piston container (E) is connected with the first constant pressure constant speed pump (R1) by pneumatic operated valve (K4),
And be connected by pneumatic operated valve (K15) and second liquid reception container (F2).
8. the gas-liquid injection imitation oil displacement experiment and fluid property according to claim 5 or 6 determines device, it is characterised in that institute
State the sandwiched device of rock core (A), the first back-pressure valve (B1), the second back-pressure valve (B2), oil-gas-water metering device (D), liquid piston container
(E), Liquid acquisition container (F1), the first mass flowmenter (H1), the second mass flowmenter (H2), first gas piston container
(L1), second gas piston container (L2) and the first impermeable light box (G1) and the second impermeable light box (G2) are placed in calorstat
(Q) in.
9. the gas-liquid injection imitation oil displacement experiment and fluid property according to claim 5 or 6 determines device, it is characterised in that institute
State the first mass flowmenter (H1), the second mass flowmenter (H2), pneumatic operated valve (K1-K25), each pressure transducer (P1-P4,
P7), each differential pressure pickup (P4, P5), calorstat (Q), each constant pressure constant speed pump (R1-R3), the first light source (G3), secondary light source
(G4), the first high power video camera (G7), the second high power video camera (G8), gas boosting pump M are each coupled electrically to computer (W).
10. a kind of gas-liquid injects imitation oil displacement experiment and fluid property assay method, and methods described adopts any one of claim 1 to 9
Described gas-liquid injection imitation oil displacement experiment and fluid property determine device and carry out gas-liquid injection imitation oil displacement experiment experiment and in rock core
Fluid property is measured, and comprises the following steps：
Step one：Three layers of heterogeneous body saturated core are put in the sandwiched device of rock core (A), liquid loads in liquid piston container (E),
In gas cylinder (N), gaseous species meet the design of the imitation oil displacement experiment experiment, first gas piston container (L1) and the second gas
Piston in body piston container (L2) is located at top, and all pneumatic operated valves are in closed mode, computer (W) control calorstat
(Q) it is heated to imitation oil displacement experiment experiment preset temperature；Computer (W) controls the first light source (G3) and secondary light source (G4) is opened, and
Control the first high power video camera (G7) and the second high power video camera (G8) is opened；
Step 2：Computer (W) control pneumatic operated valve (K8, K7, K10, K16) is opened, and the gas in gas cylinder (N) passes through gas
Booster pump (M) and pneumatic operated valve (K8, K7, K10) in first gas piston container (L1), when first gas piston container (L1)
In piston be pulled to bottom, computer (W) control pneumatic operated valve (K10, K16) cuts out；Computer (W) control pneumatic operated valve (K9,
K17) open, the gas in gas cylinder (N) passes through booster pump (M) and pneumatic operated valve (K8, K7, K9) to be held into second gas piston
In device (L2), when the piston in second gas piston container (L2) is pulled to bottom, computer (W) control pneumatic operated valve (K8, K7,
K9, K17) close；
Step 3：The pressure value of the first back-pressure valve (B1), computer (W) control are set according to the back pressure of imitation oil displacement experiment experimental design
Pneumatic operated valve (K4, K13, K14) is opened, and computer (W) controls the first constant pressure constant speed pump (R1), the second constant pressure constant speed pump (R2) and the
Three constant pressure constant speed pumps (R3) are respectively to liquid piston container (E), first gas piston container (L1), second gas piston container
(L2) pressurize, when the pressure value of second pressure sensor (P2), the 3rd pressure transducer (P3) or the 4th pressure transducer (P4)
When equal with the pressure value of the first back-pressure valve (B1), computer (W) controls corresponding constant pressure constant speed pump to be stopped；
Step 4：Injection mode or gas-liquid are replaced using gas-liquid while injection mode is to the saturated core in the sandwiched device of rock core (A)
Middle injection displacement of reservoir oil medium, in injection process, computer (W) is observed by the first high power video camera (G7) and the first light source (G3)
The flow regime of gas, liquid or gas-liquid mixture, in combination with the first mass flowmenter (H1) and the first differential pressure pickup
(P5) numerical computations go out the kinematic viscosity of gas, liquid or gas-liquid mixture；Computer (W) control pneumatic operated valve (K18-K24)
In one unlatching, set back-pressure valve (B2) pressure be equal to the 5th pressure transducer (P7) pressure value, by the second high power
Video camera (G8) three layers of heterogeneous core fluid acquisition point (A2-A7) corresponding with secondary light source (G4) observation and the sandwiched device of rock core go out
The fluid flow state of mouth (A8), also in conjunction with the second mass flowmenter (H2) and the numerical computations of the second differential pressure pickup (P6)
Go out the kinematic viscosity of the collection point fluid, till meeting the injection length of imitation oil displacement experiment experimental design.
11. gas-liquid injection imitation oil displacement experiments according to claim 10 and fluid property assay method, it is characterised in that step
Injection mode is comprised the following steps gas-liquid in four simultaneously：
Computer (W) control pneumatic operated valve (K3, K5, K6, K10) is opened, computer (W) control the first constant pressure constant speed pump (R1), the
Two constant pressure constant speed pumps (R2) are simulated when meeting with the gas liquid ratio of imitation oil displacement experiment experimental design, injection rate injection liquids and gases
After the injection length of oil displacement experiment design, computer (W) control pneumatic operated valve (K3, K5, K6, K10) cuts out and stops the first constant pressure
Constant speed pump (R1) and the second constant pressure constant speed pump (R2)；First pressure sensor (P1) is recorded in experimentation Computer (W)
The flow velocity and injection length of pressure value and the first mass flowmenter (H1) aerated fluid, and real time record oil-gas-water metering device
(D) oil, gas and water volume in.
12. gas-liquid injection imitation oil displacement experiments according to claim 10 and fluid property assay method, it is characterised in that step
Gas-liquid alternating injection mode in four includes following steps alternately：
(1) when injecting liquid, computer (W) control pneumatic operated valve (K3, K4, K5) is opened, and computer (W) controls the first constant pressure constant speed
Pump (R1) injects liquid with the speed of constant imitation oil displacement experiment experimental design, when the injection length for meeting imitation oil displacement experiment experimental design
Afterwards, computer (W) control pneumatic operated valve (K5) cuts out, and stops the first constant pressure constant speed pump (R1)；Computer (W) is while recording liquid
The value of the first pressure sensor (P1) during injection, liquid injection length and speed, are measured by the first mass flowmenter (H1)
The injection rate that recorded by the first constant pressure constant speed pump (R1) of liquid injection rate correction；
In injection liquid process, computer (W) is opened while controlling pneumatic operated valve (K13, K14), and is respectively compared the 3rd pressure
The size of the pressure value of sensor (P3), the pressure value of the 4th pressure transducer (P4) and first pressure sensor (P1), i.e., when
When the pressure value of the 3rd pressure transducer (P3) is more than the pressure value of first pressure sensor (P1), computer (W) controls pneumatic
Valve (K11) is opened, and gas is discharged from the first evacuated tube (U1), until the pressure value of the 3rd pressure transducer (P3) is equal to the first pressure
Till the pressure value of force transducer (P1), pneumatic operated valve (K11) is closed；When the pressure value of the 3rd pressure transducer (P3) is less than first
During the pressure value of pressure transducer (P1), computer (W) controls the second constant pressure constant speed pump (R2) to first gas piston container
(L1) pressurize, till the pressure value of the 3rd pressure transducer (P3) is equal to the pressure value of first pressure sensor (P1), stop
Only the second constant pressure constant speed pump (R2) pressurization；Equally, when the pressure value of the 4th pressure transducer (P4) is more than first pressure sensor
(P1) pressure value, computer (W) control pneumatic operated valve (K12) are opened, and gas is discharged from the second evacuated tube (U2), until the 4th pressure
Till the pressure value of force transducer (P4) is equal to the pressure value of first pressure sensor (P1), pneumatic operated valve (K12) is closed；When the 4th
When the pressure value of pressure transducer (P4) is less than the pressure value of first pressure sensor (P1), computer (W) controls the 3rd constant pressure
Constant speed pump (R3) pressurizes to second gas piston container (L2), until the pressure value of the 4th pressure transducer (P4) is equal to the first pressure
Till the pressure value of force transducer (P1), stop the pressurization of the 3rd constant pressure constant speed pump (R3), until liquid injection is finished；
(2) when injecting gas, computer (W) control pneumatic operated valve (K3, K6, K10) is opened, and computer (W) controls the second constant pressure and constant
Fast pump (R2) injects gas with the speed of imitation oil displacement experiment experimental design, after the injection length of imitation oil displacement experiment experimental design is met,
Computer (W) control pneumatic operated valve (K6, K10) cuts out and stops the second constant pressure constant speed pump (R2)；Computer (W) record gas injection
When the value of first pressure sensor (P1), gas injection rate and time, the gas measured by the first mass flowmenter (H1)
The injection rate that the correction of body injection rate is recorded by the second constant pressure constant speed pump (R2)；
In injection gas process, computer (W) compares the pressure value and first pressure sensor of the 4th pressure transducer (P4)
(P1) size of pressure value, when the pressure value of the 4th pressure transducer (P4) is more than the pressure of first pressure sensor (P1)
Value, computer (W) control pneumatic operated valve (K12) are opened, and gas is discharged from the second evacuated tube (U2), until the 4th pressure transducer
(P4), till pressure value is equal to the pressure value of first pressure sensor (P1), close pneumatic operated valve (K12)；When the 4th pressure sensing
Pressure value of the pressure value of device (P4) less than first pressure sensor (P1), computer (W) control the 3rd constant pressure constant speed pump (R3)
Second gas piston container (L2) are pressurizeed, until the pressure value of the 4th pressure transducer (P4) is equal to first pressure sensor
(P1) till pressure value, stop the pressurization of the 3rd constant pressure constant speed pump (R3), until gas injection is finished, or work as first gas piston
When in container (L1), gas volume is finished, computer (W) control pneumatic operated valve (K9) is opened, and control pneumatic operated valve (K10) is closed and stopped
Only the second constant pressure constant speed pump (R2), computer (W) control the 3rd constant pressure constant speed pump (R3) with same imitation oil displacement experiment experimental design
Speed continue injection gas, after the injection length of imitation oil displacement experiment experimental design is met, computer W control pneumatic operated valve (K6,
K9) close and stop the 3rd constant pressure constant speed pump (R3)；
In injection gas process, computer (W) is while compare the pressure value and first pressure biography of second pressure sensor (P2)
The size of the pressure value of sensor (P1), when the pressure value of second pressure sensor (P2) is more than the pressure of first pressure sensor (P1)
During force value, computer (W) control pneumatic operated valve (K2) is opened, and is discharged surplus liquid and is received in container (F1) to first liquid, until
Till the pressure value of second pressure sensor (P2) is equal to the pressure value of first pressure sensor (P1), pneumatic operated valve (K2) is closed；
When the pressure value of second pressure sensor (P2) is less than the pressure value of first pressure sensor (P1), computer (W) control first
Constant pressure constant speed pump (R1) pressurizes to liquid piston container (E), until the pressure value of second pressure sensor (P2) is equal to the first pressure
Till the pressure value of force transducer (P1), stop the first constant pressure constant speed pump (R1), until gas injection is finished.
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