CN106525655B - A kind of gas-liquid injection imitation oil displacement experiment and fluid property measurement device and method - Google Patents

A kind of gas-liquid injection imitation oil displacement experiment and fluid property measurement device and method Download PDF

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Publication number
CN106525655B
CN106525655B CN201610985253.8A CN201610985253A CN106525655B CN 106525655 B CN106525655 B CN 106525655B CN 201610985253 A CN201610985253 A CN 201610985253A CN 106525655 B CN106525655 B CN 106525655B
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pressure
gas
operated valve
pneumatic operated
liquid
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CN106525655A (en
Inventor
刘宏生
韩培慧
陈广宇
孙刚
姜彬
吕昌森
郭松林
崔长玉
曹瑞波
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Daqing Oilfield Co Ltd
China Petroleum and Natural Gas Co Ltd
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Daqing Oilfield Co Ltd
China Petroleum and Natural Gas Co Ltd
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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

Abstract

The present invention provides a kind of gas-liquid injection imitation oil displacement experiment and fluid property measurement device and method, described device include simulate the model system of oil reservoir, to model system injection displacing medium injected system, metering acquisition is carried out to the efflux of model system efflux metering collecting system and measurement system for obtaining fluid property in rock core, the measurement system includes: the first mass flowmenter and the first visual capillary, the second mass flowmenter and the second visual capillary.Apparatus of the present invention are by being arranged visual capillary, mass flowmenter and differential pressure pickup, measure fluid enter rock core before, in rock core different layers position different location and outflow rock core after flow morphology and kinematic viscosity, facilitate analysis injection fluid or inject the motion state and speed after fluid is mixed with crude oil in the earth formation, provides technical support for Study of Fluid migration rule and mechanism of oil displacement；Pass through the flow velocity and flow of the accurate meter gaseous of mass flowmenter, liquid or gas-liquid mixture fluid.

Description

A kind of gas-liquid injection imitation oil displacement experiment and fluid property measurement device and method
Technical field
The invention belongs to petroleum works and technology field, and in particular to one kind, which is suitable for laboratory environment, can realize gas Liquid alternately injects or the device and method of concurrently injected gas-liquid injection imitation oil displacement experiment, which can also be straight Connect the measurement for realizing fluid property.
Background technique
Petroleum is the non-renewable energy, and cost-effectively developing existing oil field is eternal project.Water drive can be improved Recovery ratio 1/3-1/5, each elephant in China has been in the water drive later period, but has petroleum-in-place 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 mature in tertiary oil recovery, and the quality of physical contradictions result is to judge that can chemical flooding The main foundation of field application.
Currently, physical contradictions device mainly for polymer flooding, ternary composite driving or gas drive test need and Feature design, and it is seldom specifically for the gas-liquid physical simulation flooding test device that alternately injection designs, and most of is all by above Plant modification, the problems such as there are pressure oscillation when gas-liquid alternating is big, and the measurement of gas flow is inaccurate.
Summary of the invention
The purpose of the present invention is to solve the above problems, provide one kind and are suitable for laboratory environment suitable for laboratory ring Border can realize gas-liquid alternately injection or concurrently injected gas-liquid injection imitation oil displacement experiment and fluid property measurement device.
Above-mentioned purpose of the invention is realized by following technical scheme:
A kind of gas-liquid injection imitation oil displacement experiment and fluid property measurement device, including simulating the model system of oil reservoir, to model The injected system of system injection displacing medium and the efflux metering acquisition system that metering acquisition is carried out to the efflux of model system System, it further includes the measurement system for obtaining fluid property in rock core that the model system, which includes the sandwiched device of rock core (A), described Measurement system includes:
First mass flowmenter (H1) and the first visual capillary (G5), the two are connected in series in the sandwiched device of rock core (A) The sandwiched device entrance (A1) of rock core is held, and 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 (G6), the two are connected by pneumatic operated valve 24 (K24) It is connected to the sandwiched device outlet (A8) of rock core of the sandwiched device of rock core (A), and core fluids collection point (A2-A7) passes through pneumatically respectively Valve 18 (K18) is connected to the arrival end of the second mass flowmenter (H2), the second mass flowmenter to pneumatic operated valve 23 (K23) (H2) the 5th pressure sensor (P7) is arranged in arrival end；The outlet end of second visual capillary (G6) is connected to the efflux meter Quantity collection system.
In above-mentioned gas-liquid injection imitation oil displacement experiment and fluid property measurement device, the efflux metering collecting system includes the One back-pressure valve (B1), the second back-pressure valve (B2), pneumatic operated valve three (K3), pneumatic operated valve 25 (K25) and oil-gas-water metering device (D), the outlet end of the second visual capillary (G6) passes sequentially through the second back-pressure valve (B2), pneumatic operated valve 25 (K25) is connected to Oil-gas-water metering device (D), the sandwiched device outlet (A8) of the rock core of the sandwiched device of rock core (A) pass sequentially through the first back-pressure valve (B1), gas Dynamic valve three (K3) is connected to oil-gas-water metering device (D).
In above-mentioned gas-liquid injection imitation oil displacement experiment and fluid property measurement device, the first visual capillary (G5) is located at rock The sandwiched device entrance (A1) of the rock core of the sandwiched device of the heart (A) holds and is connected with pipeline, flat along the first visual capillary (G5) length direction Capable side is equipped with first light source (G3), and the other side is equipped with the first high power video camera (G7), and first visual capillary (G5's) enters The first differential pressure pickup (P5) is parallel with to measure between the first visual capillary (G5) entrance and exit between mouth and outlet Pressure difference.
In above-mentioned gas-liquid injection imitation oil displacement experiment and fluid property measurement device, the second visual capillary (G6) is located at rock Sandwiched device outlet (A8) end of the heart is connected with pipeline, and the side parallel along the second visual capillary (G6) length direction is equipped with the second light Source (G4), the other side are equipped with the second high power video camera (G8), are parallel between the entrance and exit of the second visual capillary (G6) Second differential pressure pickup (P6).
In above-mentioned gas-liquid injection imitation oil displacement experiment and fluid property measurement device, the injected system includes infusing to model system Enter the gas injection system of gas and the liquid injection system to model system injection liquid.
In above-mentioned gas-liquid injection imitation oil displacement experiment and fluid property measurement device, the gas injection system includes:
The first gas piston container (L1) and second gas piston container (L2) being connected in parallel, wherein
Pneumatic operated valve ten (K10) is equipped at the upper end opening of the first gas piston container (L1) and for measuring the first gas The third pressure sensor (P3) of body piston container (L1) internal gas pressure, the upper end opening of first gas piston container (L1) It is connected by pneumatic operated valve 11 (K11) with the first evacuated tube (U1)；The lower ending opening of first gas piston container (L1) passes through Pneumatic operated valve 14 (K14) is connected to the second constant pressure constant speed pump (R2), is connected to third Liquid acquisition by pneumatic operated valve 16 (K16) Container (F3)；
It is equipped at the upper end opening of second gas piston container (L2) pneumatic operated valve nine (K9) and living for measuring second gas The 4th pressure sensor (P4) of container (L2) internal gas pressure is filled in, the upper end opening of second gas piston container (L2) passes through Pneumatic operated valve 12 (K12) is connected with the second evacuated tube (U2)；The lower ending opening of second gas piston container (L2) passes through pneumatic Valve 13 (K13) is connected to third constant pressure constant speed pump (R3), is connected to third Liquid acquisition container by pneumatic operated valve 17 (K17) (F3)；
For storing the high pressure gas cylinder (N) of high pressure gas, the high pressure gas cylinder (N) is connected to one by pneumatic operated valve eight (K8) Gas booster pump (M), the gas booster pump (M) are connected to pneumatic operated valve (K9) and pneumatic operated valve ten (K10) by pneumatic operated valve (K7) Junction, pneumatic operated valve seven (K7), pneumatic operated valve nine (K9), pneumatic operated valve ten (K10) junction pass through pneumatic operated valve six (K6) connect To the arrival end of the first mass flowmenter (H1).
In above-mentioned gas-liquid injection imitation oil displacement experiment and fluid property measurement device, the liquid injection system includes liquid piston The upper end inlet of container (E), the liquid piston container (E) is provided with for measuring liquid pressure in liquid piston container (E) The second pressure sensor (P2) of power, the upper end opening of liquid piston container (E) pass through pneumatic operated valve two (K2) and the first liquid respectively Body receiver (F1) is connected and the arrival end of the first mass flowmenter (H1) is connected to by pneumatic operated valve five (K5)；The liquid The lower ending opening of piston container (E) is connected by pneumatic operated valve four (K4) with the first constant pressure constant speed pump (R1), and passes through pneumatic operated valve ten Five (K15) receive container (F2) with second liquid and are connected.
In above-mentioned gas-liquid injection imitation oil displacement experiment and fluid property measurement device, 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 matter Measure flowmeter (H1), the second mass flowmenter (H2), first gas piston container (L1), second gas piston container (L2) and First opaque seal box (G1) and the second opaque seal box (G2) are placed in insulating box (Q).
In above-mentioned gas-liquid injection imitation oil displacement experiment and fluid property measurement device, first mass flowmenter (H1), second Mass flowmenter (H2), each pneumatic operated valve, each pressure sensor, each differential pressure pickup, insulating box (Q), each constant pressure constant speed pump, first Light source (G3), second light source (G4), the first high power video camera (G7), the second high power video camera (G8), gas booster pump (M) electricity It is connected to computer (W).
The present invention also provides a kind of gas-liquid injection imitation oil displacement experiment and fluid property measuring method, this method uses above-mentioned gas-liquid Inject imitation oil displacement experiment and fluid property measurement device carry out gas-liquid injection imitation oil displacement experiment experiment and to fluid property in rock core into Row measurement, comprising the following steps:
Step 1: three layers of heterogeneous saturated core are put into the sandwiched device of rock core (A), and liquid is packed into liquid piston container (E) in, gaseous species meet the design of imitation oil displacement experiment experiment in high pressure gas cylinder (N), 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 state, and computer (W) control is permanent Incubator (Q) is heated to imitation oil displacement experiment experiment preset temperature；Computer (W) control first light source (G3) and second light source (G4) are opened It opens, and controls the first high power video camera (G7) and the unlatching of the second high power video camera (G8)；
Step 2: computer (W) controls pneumatic operated valve eight (K8), pneumatic operated valve seven (K7), pneumatic operated valve ten (K10), pneumatic operated valve ten Six (K16) are opened, and the gas in high pressure gas cylinder (N) passes through gas booster pump (M) and pneumatic operated valve (K8), pneumatic operated valve seven (K7), gas Dynamic valve ten (K10) enters in first gas piston container (L1), when the piston in first gas piston container (L1) is pulled to bottom Portion, computer (W) controls pneumatic operated valve ten (K10) and pneumatic operated valve 16 (K16) is closed；Computer (W) controls pneumatic operated valve nine (K9) It is opened with pneumatic operated valve 17 (K17), the gas in high pressure gas cylinder (N) passes through booster pump (M) and pneumatic operated valve eight (K8), pneumatic operated valve seven (K7) enter in second gas piston container (L2) with pneumatic operated valve nine (K9), the piston quilt in second gas piston container (L2) Shift bottom onto, computer (W) controls pneumatic operated valve eight (K8), pneumatic operated valve seven (K7), pneumatic operated valve nine (K9) and pneumatic operated valve 17 (K17) It closes；
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 It controls pneumatic operated valve four (K4), pneumatic operated valve 13 (K13) and pneumatic operated valve 14 (K14) to open, computer (W) controls the first constant pressure and constant Speed pump (R1), the second constant pressure constant speed pump (R2) and third constant pressure constant speed pump (R3) are respectively to liquid piston container (E), first gas Piston container (L1), second gas piston container (L2) pressurization, when second pressure sensor (P2), third pressure sensor (P3) Or the 4th pressure sensor (P4) pressure value it is equal with the pressure value of the first back-pressure valve (B1) when, computer (W) control is corresponding Constant pressure constant speed pump stop；
Step 4: using gas-liquid alternating injection mode or gas-liquid while oil-containing of the injection mode into the sandwiched device of rock core (A) Displacement of reservoir oil medium is injected in rock core, in injection process, computer (W) passes through the first high power video camera (G7) and first light source (G3) The flow regime for observing gas, liquid or gas-liquid mixture, in combination with the first mass flowmenter (H1) and the first pressure difference sensing The numerical value of device (P5) calculates the kinematic viscosity of gas, liquid or gas-liquid mixture；Computer (W) controls pneumatic operated valve 18 The unlatching of (K18) into pneumatic operated valve 24 (K24), the pressure of setting back-pressure valve (B2) are equal to the 5th pressure sensor (P7) pressure value passes through the second high power video camera (G8) three layers of heterogeneous core fluid corresponding with second light source (G4) Observable The fluid flow state of collection point (A2-A7) and rock core sandwiched device outlet (A8), also in conjunction with the second mass flowmenter (H2) and The numerical value of second differential pressure pickup (P6) calculates the kinematic viscosity of the collection point fluid, until meeting imitation oil displacement experiment experimental design Injection length until.
In above-mentioned gas-liquid injection imitation oil displacement experiment and fluid property measuring method, gas-liquid while injection mode packet in step 4 Include following steps:
Computer (W) control pneumatic operated valve three (K3), pneumatic operated valve five (K5), pneumatic operated valve six (K6) and pneumatic operated valve ten (K10) are opened It opens, computer (W) controls the first constant pressure constant speed pump (R1), the second constant pressure constant speed pump (R2) with the gas-liquid of imitation oil displacement experiment experimental design Liquids and gases are injected than, injection rate, after meeting the injection length of imitation oil displacement experiment experimental design, computer (W) controls gas Dynamic valve three (K3), pneumatic operated valve five (K5), pneumatic operated valve six (K6) and pneumatic operated valve ten (K10) close and stop the first constant pressure constant speed pump (R1) and the second constant pressure constant speed pump (R2)；The pressure value of computer (W) record first pressure sensor (P1) during the experiment And first mass flowmenter (H1) aerated fluid flow velocity and injection length, and in real time record oil-gas-water metering device (D) in oil, Gas and water volume.
In above-mentioned gas-liquid injection imitation oil displacement experiment and fluid property measuring method, the gas-liquid in step 4 replaces injection mode packet Include following steps alternately:
(1) when injecting liquid, computer (W) controls pneumatic operated valve three (K3), pneumatic operated valve four (K4) pneumatic operated valve five (K5) is opened, Computer (W) controls the first constant pressure constant speed pump (R1) and injects liquid with the speed of constant imitation oil displacement experiment experimental design, works as satisfaction After the injection length of imitation oil displacement experiment experimental design, computer (W) controls pneumatic operated valve five (K5) and closes, and stops the first constant pressure constant speed It pumps (R1)；Computer (W) records value, liquid injection length and the speed of the first pressure sensor (P1) when liquid injects simultaneously Degree, the note recorded by the liquid injection rate correction of the first mass flowmenter (H1) measurement by the first constant pressure constant speed pump (R1) Enter speed；
In injection liquid process, computer (W) controls pneumatic operated valve 13 (K13) simultaneously and pneumatic operated valve 14 (K14) is opened It opens, and is respectively compared the pressure value and first pressure sensor of third pressure sensor (P3), the 4th pressure sensor (P4) (P1) size of pressure value, i.e., when the pressure value of third pressure sensor (P3) is greater than the pressure of first pressure sensor (P1) When value, computer (W) controls pneumatic operated valve 11 (K11) and opens, and gas is discharged from the first evacuated tube (U1), until third pressure passes Until pressure value of the pressure value of sensor (P3) equal to first pressure sensor (P1), close pneumatic operated valve 11 (K11)；Work as third When the pressure value of pressure sensor (P3) is less than the pressure value of first pressure sensor (P1), computer (W) controls the second constant pressure Constant speed pump (R2) pressurizes to first gas piston container (L1), until the pressure value of third pressure sensor (P3) is equal to the first pressure Until the pressure value of force snesor (P1), stop the pressurization of the second constant pressure constant speed pump (R2)；Equally, when the 4th pressure sensor (P4) Pressure value be greater than first pressure sensor (P1) pressure value, computer (W) control pneumatic operated valve 12 (K12) open, gas It is discharged from the second evacuated tube (U2), until the pressure value of the 4th pressure sensor (P4) is equal to the pressure of first pressure sensor (P1) Until force value, close pneumatic operated valve 12 (K12)；When the pressure value of the 4th pressure sensor (P4) is less than first pressure sensor (P1) when pressure value, computer (W) controls third constant pressure constant speed pump (R3) and pressurizes to second gas piston container (L2), until Until pressure value of the pressure value of 4th pressure sensor (P4) equal to first pressure sensor (P1), stop third constant pressure constant speed (R3) pressurization is pumped, until liquid injection finishes；
(2) when injecting gas, computer (W) control pneumatic operated valve three (K3), pneumatic operated valve six (K6) and pneumatic operated valve ten (K10) are opened It opens, computer (W) controls the second constant pressure constant speed pump (R2) and injects gas with the speed of imitation oil displacement experiment experimental design, simulates when meeting After the injection length of oil displacement experiment design, computer (W) control pneumatic operated valve six (K6) and pneumatic operated valve ten (K10) closing simultaneously stop the Two constant pressure constant speed pumps (R2)；Computer (W) records value, the gas injection rate of the first pressure sensor (P1) when gas injects And the time, it is recorded by the gas injection rate correction of the first mass flowmenter (H1) measurement by the second constant pressure constant speed pump (R2) Injection rate；
In injection gas process, computer (W) compares the pressure value of the 4th pressure sensor (P4) and first pressure passes The size of the pressure value of sensor (P1), when the pressure value of the 4th pressure sensor (P4) is greater than the pressure of first pressure sensor (P1) Force value, computer (W) control pneumatic operated valve 12 (K12) and open, and gas is discharged from the second evacuated tube (U2), until the 4th pressure passes Until pressure value of the pressure value of sensor (P4) equal to first pressure sensor (P1), close pneumatic operated valve 12 (K12)；When the 4th The pressure value of pressure sensor (P4) is less than the pressure value of first pressure sensor (P1), and computer (W) controls third constant pressure and constant Speed pump (R3) pressurizes to second gas piston container (L2), until the pressure value of the 4th pressure sensor (P4) is equal to first pressure Until the pressure value of sensor (P1), stop third constant pressure constant speed pump (R3) pressurization, is finished until gas injects, or when the first gas When gas volume is finished in body piston container (L1), computer (W) controls pneumatic operated valve nine (K9) and opens, and controls pneumatic operated valve ten (K10) the second constant pressure constant speed pump (R2) is closed and stops, computer (W) controls third constant pressure constant speed pump (R3) similarly to simulate The speed of oil displacement experiment design continues to inject gas, after meeting the injection length of imitation oil displacement experiment experimental design, computer W control Pneumatic operated valve six (K6) and pneumatic operated valve nine (K9) close and stop third constant pressure constant speed pump (R3)；
In injection gas process, computer (W) compares the pressure value and the first pressure of second pressure sensor (P2) simultaneously The size of the pressure value of force snesor (P1), when the pressure value of second pressure sensor (P2) is greater than first pressure sensor (P1) Pressure value when, computer (W) controls pneumatic operated valve two (K2) and opens, and discharge surplus liquid is to the first Liquid acquisition container (F1) In, until the pressure value of second pressure sensor (P2) is equal to the pressure value of first pressure sensor (P1), close pneumatic Valve two (K2)；When the pressure value of second pressure sensor (P2) is less than the pressure value of first pressure sensor (P1), computer (W) It controls the first constant pressure constant speed pump (R1) to pressurize to liquid piston container (E), until the pressure value etc. of second pressure sensor (P2) Until the pressure value of first pressure sensor (P1), stop the first constant pressure constant speed pump (R1), until gas injection finishes.
By adopting the above technical scheme, the solution have the advantages that: apparatus of the present invention are by being arranged visual capillary, quality Flowmeter and differential pressure pickup, considerable fluid measured enter rock core before, in rock core different layers position different location and outflow rock Flow morphology and kinematic viscosity after the heart, are directly realized by the measurement of fluid property while imitation oil displacement experiment, facilitate analysis note Enter fluid or inject the motion state and speed after fluid is mixed with crude oil in the earth formation, is Study of Fluid migration rule and the displacement of reservoir oil Mechanism provides technical support；Real-time control first gas piston container, second gas piston are pumped by second, third constant speed and constant pressure The pressure that gas is injected in container, the pressure and rock for making first gas piston container, injecting gas in second gas piston container The sandwiched device inlet charge pressures of the heart are identical, and it is steady to realize gas injection pressure in gas-liquid injection process, and control precision is high；Pass through First constant speed and constant pressure pumps the pressure that liquid is injected in real-time control liquid piston container, makes to inject liquid in liquid piston container Pressure is identical as the sandwiched device inlet charge pressures of rock core, and it is steady to realize liquid injection pressure in gas-liquid injection process, control essence Degree is high；Pass through the flow velocity and flow of the accurate meter gaseous of mass flowmenter, liquid or gas-liquid mixture fluid.
Detailed description of the invention
Fig. 1 is overall structure diagram of the invention.
Appended drawing reference indicates in figure are as follows:
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 acquisition Point；
B1: the first back-pressure valve, the B2: the second back-pressure valve；D: oil-gas-water metering device；G1: the first opaque seal box, G2: Second opaque seal box；G3: first light source, G4: second light source；G5: the first visual capillary, the G6: the second visual capillary； G7: the first high power video camera, the G8: the second high power video camera；H1: the first mass flowmenter, the H2: the second mass flowmenter；
E: liquid piston container；F1: the first liquid receiver, F2: second liquid receiver, F3: third liquid receiver； K1-K25: pneumatic operated valve one to pneumatic operated valve 25；L1: first gas piston container, L2: second gas piston container；M: gas Booster pump；N: high pressure gas cylinder；U1: the first evacuated tube, the U2: the second evacuated tube；P1: first pressure sensor, P2: second pressure passes Sensor, P3: third pressure sensor, the P4: the four pressure sensor；P5: the first differential pressure pickup, the P6: the second differential pressure pickup； P7: the five pressure sensor；Q: insulating box；
R1: the first constant pressure constant speed pump, the R2: the second constant pressure constant speed pump, R3: third constant pressure constant speed pump；W: computer.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, to gas-liquid injection imitation oil displacement experiment of the invention and fluid property measurement device And method is described in detail.
Gas-liquid injects imitation oil displacement experiment and fluid property measurement device
As shown in Figure 1, injecting the embodiment of imitation oil displacement experiment and fluid property measurement device, the device for gas-liquid of the invention It is a kind of simulation suitable for laboratory environment and measurement device (thick line indicates physical pipeline connection, and filament indicates electrical connection), Including simulating the model system of oil reservoir, injecting liquid to the gas injection system of model system injection gas, to model system Liquid injection system carries out the efflux of model system to measure the efflux metering collecting system of acquisition and for obtaining rock The measurement system of fluid property in the heart, in which:
Model system in the present embodiment is the core sample and work that the sandwiched device A of rock core is used to make different oil bearing grades For the container for placing sample, it has the sandwiched device of rock core being connected with gas injection system, liquid injection system, measurement system The sandwiched device of entrance A1, the rock core being 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 injection fluid of same rock core, the sandwiched device outlet of same rock core A8 produces fluid, and rock is arranged in the one third position for being located at rock core length direction respectively in three layers of every layer of heterogeneous core of upper, middle and lower 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 includes high pressure gas cylinder N for storing high pressure gas and is connected in parallel First gas piston container L1 and second gas piston container L2 is equipped with third at the upper end opening of first gas piston container L1 Pressure sensor P3, for measuring the gas pressure inside first gas piston container L1；First gas piston container L1's is upper End opening is connected by 11 K11 of pneumatic operated valve with the first evacuated tube U1, for gas to be discharged, reduces first gas piston container The pressure of gas in L1；It is additionally provided with ten K10 of pneumatic operated valve at the upper end opening of first gas piston container L1, for controlling the first gas The connection of body piston container L1 and other component；Pass through 14 K14 of pneumatic operated valve at the lower ending opening of first gas piston container L1 It is connected to the second constant pressure constant speed pump R2, third Liquid acquisition container F 3, third Liquid acquisition is connected to by 16 K16 of pneumatic operated valve Container F 3 is used to receive the liquid of piston lower portion in the first, second gas piston container, and gas piston container can be made to be filled with high pressure Gas.
Similarly, the 4th pressure sensor P4 is equipped at the upper end opening of second gas piston container L2, for measuring second Gas pressure inside gas piston container L2；The upper end opening of second gas piston container L2 by 12 K12 of pneumatic operated valve with Second evacuated tube U2 is connected, and for gas to be discharged, reduces the pressure of gas in second gas piston container L2；Second gas is living It fills in and is additionally provided with nine K9 of pneumatic operated valve at the upper end opening of container L2, for controlling the company of second gas piston container L2 and other component It is logical；The lower ending opening of second gas piston container L2 is connected to third constant pressure constant speed pump R3 by 13 K13 of pneumatic operated valve, passes through gas Dynamic 17 K17 of valve is connected to third Liquid acquisition container F 3, and third constant pressure constant speed pump R3 is for controlling second gas piston container Gas flow rate and pressure in L2.
High pressure gas cylinder N is connected to a gas booster pump M by eight K8 of pneumatic operated valve, and gas booster pump M is for improving gas pressure Power is connected to the junction of ten K10 of nine K9 of pneumatic operated valve and pneumatic operated valve, seven K7 of pneumatic operated valve, pneumatic operated valve nine by seven K7 of pneumatic operated valve K9, ten K10 of pneumatic operated valve junction the arrival end of the first mass flowmenter H1 is connected to by six K6 of pneumatic operated valve.
Liquid injection system in the present embodiment includes liquid piston container E, the upper end inlet of liquid piston container E It is provided with second pressure sensor P2, for measuring the pressure of liquid in liquid piston container E, the upper end of liquid piston container E Opening is connected with the first liquid receiver F1 by two K2 of pneumatic operated valve respectively and is connected to the first mass by five K5 of pneumatic operated valve The arrival end of flowmeter H1, the first liquid receiver F1 are used to receive the liquid in liquid piston container E.Liquid piston container E Lower ending opening be connected by four K4 of pneumatic operated valve with the first constant pressure constant speed pump R1, connect by 15 K15 of pneumatic operated valve and second liquid Receptacle F2 is connected, wherein the first constant pressure constant speed pump R1 controls the flow velocity and pressure of liquid in liquid piston container E, the second liquid Body receives the liquid that container F 2 receives 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 The visual capillary G6 of tubule G5 and second, wherein the visual capillary G5 of the first mass flowmenter H1 and first is connected in series in rock The sandwiched end device entrance A1 of rock core of the sandwiched device A of the heart is provided with first pressure sensor at the arrival end of the first mass flowmenter H1 The arrival end of P1, 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 end；Second The visual capillary G6 of mass flowmenter H2 and second is connected in series to the rock core of the sandwiched device A of rock core by 24 K24 of pneumatic operated valve Sandwiched device exports A8, and core fluids collection point A2-A7 passes through 18 K18 of pneumatic operated valve to 23 K23 of pneumatic operated valve company respectively It is connected to the arrival end of the second mass flowmenter H2, the second mass flowmenter H2 arrival end is arranged the 5th pressure sensor P7, and second Mass flowmenter H2 is used to measure the flow velocity of the gas flowed out core fluids collection point, liquid or gas-liquid mixture.Second is visual The outlet end of capillary G6 is connected to efflux metering collecting system.
First visual capillary 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 does not cover on pipeline, he is individual equipment, connect with pipeline), along the first visual capillary G5 length direction Parallel side be equipped with first light source G3, the other side be equipped with the first high power video camera G7, the entrance of the first visual capillary G5 and The first differential pressure pickup P5 is parallel between outlet, for measuring the pressure between the first visual capillary G5 entrance and exit Difference, the first visual capillary G5, first light source G3, the first high power video camera G7 and the first differential pressure pickup P5 are placed in first In the cabinet of opaque seal box G1, it is therefore an objective to avoid ambient from interfering, so that video camera shooting is more clear stabilization, keep temperature Spend constant, raising measurement accuracy；Equally, the second visual capillary G6 is located at the rock core sandwiched device outlet side A8 and is connected with pipeline, edge The parallel side of second visual capillary G6 length direction is equipped with second light source G4, and the other side is equipped with the second high power video camera G8, The second differential pressure pickup P6, the second visual capillary G6, second is parallel between the entrance and exit of second visual capillary G6 Light source G4, the second high power video camera G8 and the second differential pressure pickup P6 are in opaque seal case G2.
Efflux metering collecting system in the present embodiment includes the first back-pressure valve B1, the second back-pressure valve B2, pneumatic operated valve three K3,25 K25 of pneumatic operated valve and oil-gas-water metering device D, the outlet end of the second visual capillary G6 pass sequentially through the second back pressure Valve B2,25 K25 of pneumatic operated valve are connected to oil-gas-water metering device D, and the sandwiched device outlet A8 of the rock core of the sandwiched device A of rock core successively leads to Cross the first back-pressure valve B1, three K3 of pneumatic operated valve is connected to oil-gas-water metering device D, the first back-pressure valve B1 and the second back-pressure valve B2 difference For controlling the outlet pressure of the sandwiched device outlet visual capillary G6 of A8 and second of rock core, oil-gas-water metering device D is for measuring The volume withdrawl of different time oil, gas and water.
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 The opaque seal box G2 of the opaque seal box G1 and second of piston container L2 and first is placed in insulating box Q, it is therefore an objective to be protected Hold in experimentation inject fluid temperature (F.T.) it is constant, improve experimental precision, oven heat temperature range be 25 DEG C -200 DEG C.And its It is Aging equipment in order to prevent that its component, which is not put into insulating box Q, improves device longevity and safety.
First mass flowmenter H1, the second mass flowmenter H2, each pneumatic operated valve, each pressure sensor, insulating box Q, each perseverance Press constant speed pump, first light source G3, second light source G4, the first high power video camera G7, the second high power video camera G8, gas booster pump M It is each coupled electrically to computer W, by the data of computer W acquisition corresponding component, the parameter of corresponding component is set and controls corresponding The execution of component.
Above each component forms gas-liquid injection imitation oil displacement experiment and fluid property of the invention according to above-mentioned connection relationship and measures Device touches the equal acid and alkali-resistance of pipeline of each component and connecting components of gas medium and/or liquid medium in the device Corrosion, and resistance to it is pressed in 50MPa or more；Fox's polo company may be selected in first mass flowmenter H1 and the second mass flowmenter H2 Product, which can measure gas phase, the mass flow of liquid phase and gas-liquid two-phase, the first visual visual hair of capillary G5 and second Tubule G6 can be sapphire material, pressure-resistant 50MPa or more, 200 DEG C of heatproof or more；First gas piston container L1 and second gas Piston container L2 volume is 2000mL or 3000mL, is selected according to the rock pore volume in the sandwiched device of rock core, rock core hole Volume is less than 200mL, selects 2000mL, and rock pore volume is greater than 200mL, selects 3000mL, and liquid piston container E volume is 500mL or 1000mL is selected according to the rock pore volume in the sandwiched device of rock core, and rock pore volume is less than 200mL, is selected 500mL, rock pore volume are greater than 200mL, select 1000mL.
Gas-liquid injects imitation oil displacement experiment and fluid property measuring method
Gas-liquid injection imitation oil displacement experiment experiment can be carried out using above-mentioned apparatus and fluid property in rock core is measured, Specific gas-liquid injection imitation oil displacement experiment and fluid property measuring method the following steps are included:
Step 1: three layers of heterogeneous saturated core are put into the sandwiched device A of rock core, and liquid is fitted into liquid piston container E, Gaseous species meet the design of experiment in high pressure gas cylinder N, 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 state, and computer W control insulating box Q is heated to experiment preset temperature；Meter Calculation machine W controls first light source G3 and second 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 of capillary tube fluid in whole experiment process (obtain the flow regime of fluid).
Step 2: computer W control eight K8 of pneumatic operated valve, seven K7 of pneumatic operated valve, ten K10 of pneumatic operated valve, 16 K16 of pneumatic operated valve are opened It opens, the gas in high pressure gas cylinder N enters the by eight K8 of gas booster pump M and pneumatic operated valve, seven K7 of pneumatic operated valve, ten K10 of pneumatic operated valve In one gas piston container L1, when the piston in first gas piston container L1 is pulled to bottom, computer W controls pneumatic operated valve ten K10,16 K16 of pneumatic operated valve are closed；Computer W controls nine K9 of pneumatic operated valve, 17 K17 of pneumatic operated valve and opens, the gas in high pressure gas cylinder N Body is entered in second gas piston container L2 by eight K8 of booster pump M and pneumatic operated valve, seven K7 of pneumatic operated valve, nine K9 of pneumatic operated valve, when Piston in two gas piston container L2 is pulled to bottom, and computer W controls eight K8 of pneumatic operated valve, seven K7 of pneumatic operated valve, pneumatic operated valve nine K9,17 K17 of pneumatic operated valve are closed.
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 Four K4 of pneumatic operated valve, 13 K13 of pneumatic operated valve, 14 K14 of pneumatic operated valve are opened, and computer W controls the first constant pressure constant speed pump R1, the second perseverance Press constant speed pump R2 and third constant pressure constant speed pump R3 living to liquid piston container E, first gas piston container L1, second gas respectively Fill in container L2 pressurization, when second pressure sensor P2, third pressure sensor P3 or the 4th pressure sensor P4 pressure value with When the pressure value of first back-pressure valve B1 is equal, computer W, which controls corresponding constant pressure constant speed pump, to be stopped.
Step 4: replacing injection mode or gas-liquid using gas-liquid, injection mode contains oil rock into the sandwiched device A of rock core simultaneously Displacement of reservoir oil medium is injected in the heart, and in injection process, computer W observes gas by the first high power video camera G7 and first light source G3 The flow regime of body, liquid or gas-liquid mixture, in combination with the first mass flowmenter H1 numerical value (into the fluid stream before rock core Speed) and the first differential pressure pickup P5 numerical value (differential pressures at the first both ends visual capillary G5) calculates gas, liquid or gas-liquid are mixed Close the kinematic viscosity of object；Computer W controls a unlatching of 18 K18 of pneumatic operated valve into 24 K24 of pneumatic operated valve, sets back pressure Pressure value of the pressure of valve B2 equal to the 5th pressure sensor P7 (flows out at any collection point in the A2-A7 of core fluids collection point Pressure after rock core), corresponding three layers of heterogeneous core fluid acquisition are observed by the second high power video camera G8 and second light source G4 The fluid flow state of point A2-A7 and the sandwiched device outlet A8 of rock core, measurement rock core sandwiched device need when exporting the fluid properties of A8 Three K3 of pneumatic operated valve is closed, also in conjunction with the second mass flowmenter H2 (fluid flow rate after outflow rock core) and the second differential pressure pickup The kinematic viscosity that P6 numerical value (differential pressures at the second both ends visual capillary G6) calculates the collection point fluid is driven until meeting simulation Until the injection length of oily experimental design.
Gas-liquid in step 4 simultaneously injection mode the following steps are included:
Computer W controls three K3 of pneumatic operated valve, five K5 of pneumatic operated valve, six K6 of pneumatic operated valve, ten K10 of pneumatic operated valve and opens, computer W control The first constant pressure constant speed pump R1, the second constant pressure constant speed pump R2 are made with the gas liquid ratio of imitation oil displacement experiment experimental design, injection rate injection liquid Body and gas, after meeting the injection length of imitation oil displacement experiment experimental design, computer W control three K3 of pneumatic operated valve, five K5 of pneumatic operated valve, Six K6 of pneumatic operated valve, ten K10 of pneumatic operated valve close and stop the first constant pressure constant speed pump R1 and the second constant pressure constant speed pump R2；In experimentation When flow velocity and the injection of the pressure value of middle computer W record first pressure sensor P1 and the first mass flowmenter H1 aerated fluid Between, and oil gas water volume in oil-gas-water metering device D is recorded in real time.
Gas-liquid alternating injection mode includes following steps alternately in step 4:
(1) when injecting liquid, computer W controls three K3 of pneumatic operated valve, four K4 of pneumatic operated valve, five K5 of pneumatic operated valve and opens, computer W It controls the first constant pressure constant speed pump R1 and liquid is injected with the speed of constant imitation oil displacement experiment experimental design, tested when meeting imitation oil displacement experiment After the injection length of design, imitation oil displacement experiment computer W controls five K5 of pneumatic operated valve and closes, stops the first constant pressure constant speed pump R1；It calculates Machine W records value, liquid injection length and the speed of first pressure sensor P1 when liquid injects (when injection rate=injection simultaneously Between × injection rate), computer W passes through the first constant pressure and constant by the liquid injection rate correction of the first mass flowmenter H1 measurement The injection rate of speed pump R1 record, guarantees the accurate of injection rate.
In injection liquid process, computer W controls 13 K13 of pneumatic operated valve, 14 K14 of pneumatic operated valve unlatching simultaneously, and divides Do not compare the big of pressure value and the pressure value of first pressure sensor P1 of third pressure sensor P3, the 4th pressure sensor P4 Small, i.e., when the pressure value of third pressure sensor P3 is greater than the pressure value of first pressure sensor P1, computer W control is pneumatic 11 K11 of valve is opened, and gas is discharged from the first evacuated tube U1, until the pressure value of third pressure sensor P3 is equal to first pressure Until the pressure value of sensor P1,11 K11 of pneumatic operated valve is closed；When the pressure value of third pressure sensor P3 is less than first pressure When the pressure value of sensor P1, computer W controls the second constant pressure constant speed pump R2 and pressurizes to first gas piston container L1, Zhi Dao Until pressure value of the pressure value of three pressure sensor P3 equal to first pressure sensor P1, stops the second constant pressure constant speed pump R2 and add Pressure；Equally, when the pressure value of the 4th pressure sensor P4 is greater than the pressure value of first pressure sensor P1, computer W controls gas Dynamic 12 K12 of valve is opened, and gas is discharged from the second evacuated tube U2, until the pressure value of the 4th pressure sensor P4 is equal to the first pressure Until the pressure value of force snesor P1,12 K12 of pneumatic operated valve is closed；When the pressure value of the 4th pressure sensor P4 is less than the first pressure When the pressure value of force snesor P1, computer W controls third constant pressure constant speed pump R3 and pressurizes to second gas piston container L2, until Until pressure value of the pressure value of 4th pressure sensor P4 equal to first pressure sensor P1, stop third constant pressure constant speed pump R3 Pressurization, until liquid injection finishes.
(2) when injecting gas, computer W controls three K3 of pneumatic operated valve, six K6 of pneumatic operated valve, ten K10 of pneumatic operated valve and opens, computer W controls the second constant pressure constant speed pump R2 and injects gas with the speed of imitation oil displacement experiment experimental design, when meeting imitation oil displacement experiment experimental design Injection length after, imitation oil displacement experiment computer W control six K6 of pneumatic operated valve, ten K10 of pneumatic operated valve are closed and are stopped the second constant pressure constant speed Pump R2；Computer W records value, gas injection rate and the time of first pressure sensor P1 when gas injects, and computer W is logical The gas injection rate correction of the first mass flowmenter H1 measurement is crossed by the injection rate of the second constant pressure constant speed pump R2 record, is protected Demonstrate,prove the accurate of injection rate.
In injection gas process, computer W compares the pressure value and first pressure sensor of the 4th pressure sensor P4 The size of the pressure value of P1, when the pressure value of the 4th pressure sensor P4 is greater than the pressure value of first pressure sensor P1, calculating Machine W controls 12 K12 of pneumatic operated valve and opens, and gas is discharged from the second evacuated tube U2, until the pressure value of the 4th pressure sensor P4 Until pressure value equal to first pressure sensor P1,12 K12 of pneumatic operated valve is closed；When the pressure value of the 4th pressure sensor P4 Less than the pressure value of first pressure sensor P1, computer W controls third constant pressure constant speed pump R3 to second gas piston container L2 It is permanent to stop third until the pressure value of the 4th pressure sensor P4 is equal to the pressure value of first pressure sensor P1 for pressurization Constant speed pump R3 pressurization is pressed, is finished until gas injects, or when gas volume is finished in first gas piston container L1, computer W controls nine K9 of pneumatic operated valve and opens, and control ten K10 of pneumatic operated valve, which is closed and stopped the second constant pressure constant speed pump R2, computer W, controls third Constant pressure constant speed pump R3 continues to inject gas with same imitation oil displacement experiment requirement of experiment speed, drives when injection gas time meets simulation After oily requirement of experiment, six K6 of computer W Pneumatic automatic-control valve, nine K9 of pneumatic operated valve close and stop third 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 passes The size of the pressure value of sensor P1, when the pressure value of second pressure sensor P2 is greater than the pressure value of first pressure sensor P1 When, computer W controls two K2 of pneumatic operated valve and opens, and surplus liquid is discharged into the first Liquid acquisition container F 1, until second pressure Until pressure value of the pressure value of sensor P2 equal to first pressure sensor P1, two K2 of pneumatic operated valve is closed；When second pressure passes The pressure value of sensor P2 is less than the pressure value of first pressure sensor P1, and computer W controls the first constant pressure constant speed pump R1 to liquid Piston container E pressurization stops until the pressure value of second pressure sensor P2 is equal to the pressure value of first pressure sensor P1 Only the first constant pressure constant speed pump R1, until gas injection finishes.
Core entry pressure is steady when gas-liquid injects gas-liquid alternating injection in imitation oil displacement experiment and fluid property measuring method, stream Speed is constant, does not fluctuate.Mass flowmenter can measure the flow velocity of minimum gas, liquid, gas-liquid mixture.
The fluid property parameter obtained in gas-liquid injection imitation oil displacement experiment and fluid property measuring method includes: 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), fluid flow rate (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 sensor P7 record).
Kinematic viscosity is calculated by formula Poiseuille's law.Fluid kinematic viscosity calculation formula are as follows:
μ is fluid viscosity in formula, and Q is the flow of fluid, and L is the length of visual capillary, and r is the half of visual capillary Diameter, △ P are the differential pressure at visual capillary both ends, and K is visual capillary constant.
The injection liquid fluidity of gas-liquid injection imitation oil displacement experiment and the sandwiched device of the available rock core of fluid property measuring method Matter and outlet liquid stream move property.The sandwiched device of rock core can measure same in six fluid acquisition points of upper, middle and lower three-layer set A2-A7 The property of one layer of position different location fluid, the property of different layers position same position fluid.It is different in rock core that fluid can be measured The fluid properties of position, layer position.If rock core oil-containing, influence of the oil to different location fluid property can be measured.
The fluid property data of above-mentioned acquisition can be used for the research of mechanism of oil displacement (referring to experimental verification part).
In addition, if experiment also other particular/special requirements injection process can be adjusted according to the actual situation, to meet experiment It is required that.
Experimental verification
45 DEG C of experimental temperature, rock core upper, middle and lower layer permeability is respectively 200,800,1000md, and rock pore volume is 256mL, oil saturation 71%；Experimental design back pressure is 5MPa, and gas-liquid is injected simultaneously, gas liquid ratio 1:1, carbon dioxide gas Body injection rate 0.9mL/min, foaming agent injection rate 0.9mL/min, injection length 72min, foaming agent composition are as follows: sulfo group sweet tea 0.2wt%, partially hydrolyzed polyacrylamide (PHPA) (molecular weight are pressed in dish alkali silicon surface active agent 0.5wt%, dodecyl dimethyl oxidation Be 16,600,000, degree of hydrolysis 23%) 0.1wt%, surplus be water.The length of first visual capillary G5, the second visual capillary G6 Degree is 80cm, and internal diameter 1mm, visual capillary constant K are 0.756.
1 imitation oil displacement experiment experiment parameter table of table
Analyzing fluid different time, the flow regime of different location and viscosity parameter in rock core is that analysis mechanism of oil displacement mentions For foundation.A4 is changed over time, great changes will take place for the collection point A7 fluid viscosity, and observes containing oil whip, illustrates this two o'clock The neighbouring formation of foam effective displacement in position, and the oil near this two o'clock position is come out by displacement, illustrates foam in medium to high permeable Layer forms effective displacement.In injection 40min, the collection point A2 viscosity is lower, observes on a small quantity containing oil whip, shows less permeable layer Foam does not form effective displacement, the displacement efficiency for needing to take other displacement methods to improve less permeable layer again.It is injecting The collection point 70min, A8 viscosity is lower, and only observes on a small quantity containing oil whip, show foaming agent adsorption loss 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 without limiting this The range of invention, the various equivalent variations and modification made to the present invention belong to the disclosure of invention.

Claims (9)

1. a kind of gas-liquid injection imitation oil displacement experiment and fluid property measurement device, including simulating the model system of oil reservoir, to model system The injected system of system injection displacing medium and the efflux metering collecting system that metering acquisition is carried out to the efflux of model system, The model system includes the sandwiched device of rock core (A), which is characterized in that further includes the measurement system for obtaining fluid property in rock core System, the measurement system include:
First mass flowmenter (H1) and the first visual capillary (G5), the two are connected in series in the rock core of the sandwiched device of rock core (A) Sandwiched device entrance (A1) is held, and is provided with first pressure sensor (P1) at the arrival end of the first mass flowmenter (H1)；First matter The arrival end of amount flowmeter (H1) is connected to the injected system；
Second mass flowmenter (H2) and the second visual capillary (G6), the two are connected in series by pneumatic operated valve 24 (K24) To the sandwiched device outlet (A8) of rock core of the sandwiched device of rock core (A), and core fluids collection point (A2-A7) passes through pneumatic operated valve ten respectively Eight (K18) are connected to the arrival end of the second mass flowmenter (H2), the second mass flowmenter (H2) to pneumatic operated valve 23 (K23) The 5th pressure sensor (P7) is arranged in arrival end；The outlet end of second visual capillary (G6) is connected to the efflux metering and adopts Collecting system；
The rock core that the first visual capillary (G5) is located at the sandwiched device of rock core (A) sandwiched device entrance (A1) end and with pipeline phase Even, the side parallel along the first visual capillary (G5) length direction is equipped with first light source (G3), and the other side is equipped with the first high power Video camera (G7) is parallel with the first differential pressure pickup (P5) to measure between the entrance and exit of the first visual capillary (G5) Pressure difference between first visual capillary (G5) entrance and exit；
The injected system includes the gas injection system to model system injection gas and the liquid to model system injection liquid Body injected system；The liquid injection system includes liquid piston container (E), the upper end entrance of the liquid piston container (E) Place is provided with the second pressure sensor (P2) for measuring fluid pressure in liquid piston container (E), liquid piston container (E) Upper end opening pass through respectively pneumatic operated valve two (K2) be connected with the first liquid receiver (F1) and by pneumatic operated valve five (K5) even It is connected to the arrival end of the first mass flowmenter (H1)；The lower ending opening of the liquid piston container (E) passes through pneumatic operated valve four (K4) It is connected with the first constant pressure constant speed pump (R1), and container (F2) is received with second liquid by pneumatic operated valve 15 (K15) and is connected.
2. gas-liquid according to claim 1 injection imitation oil displacement experiment and fluid property measurement device, which is characterized in that described the Two visual capillaries (G6) are located at sandwiched device outlet (A8) end of rock core and are connected with pipeline, along the second visual capillary (G6) length side It is equipped with second light source (G4) to parallel side, the other side is equipped with the second high power video camera (G8), the second visual capillary (G6) Entrance and exit between be parallel with the second differential pressure pickup (P6).
3. gas-liquid injection imitation oil displacement experiment according to claim 2 and fluid property measurement device, which is characterized in that the stream Liquid metering collecting system includes the first back-pressure valve (B1), the second back-pressure valve (B2), pneumatic operated valve three (K3), pneumatic operated valve 25 out (K25) and oil-gas-water metering device (D), the outlet end of the second visual capillary (G6) pass sequentially through the second back-pressure valve (B2), gas Dynamic valve 25 (K25) is connected to oil-gas-water metering device (D), and the sandwiched device outlet (A8) of the rock core of the sandwiched device of rock core (A) is successively Oil-gas-water metering device (D) is connected to by the first back-pressure valve (B1), pneumatic operated valve three (K3).
4. gas-liquid injection imitation oil displacement experiment according to claim 3 and fluid property measurement device, which is characterized in that the gas Body injected system includes:
The first gas piston container (L1) and second gas piston container (L2) being connected in parallel, wherein
It is equipped at the upper end opening of the first gas piston container (L1) pneumatic operated valve ten (K10) and living for measuring first gas The third pressure sensor (P3) of container (L1) internal gas pressure is filled in, the upper end opening of first gas piston container (L1) passes through Pneumatic operated valve 11 (K11) is connected with the first evacuated tube (U1)；The lower ending opening of first gas piston container (L1) passes through pneumatic Valve 14 (K14) is connected to the second constant pressure constant speed pump (R2), is connected to third Liquid acquisition container by pneumatic operated valve 16 (K16) (F3)；
It is equipped with pneumatic operated valve nine (K9) at the upper end opening of second gas piston container (L2) and holds for measuring second gas piston 4th pressure sensor (P4) of device (L2) internal gas pressure, the upper end opening of second gas piston container (L2) pass through pneumatic Valve 12 (K12) is connected with the second evacuated tube (U2)；The lower ending opening of second gas piston container (L2) passes through pneumatic operated valve ten Three (K13) are connected to third constant pressure constant speed pump (R3), are connected to third Liquid acquisition container by pneumatic operated valve 17 (K17) (F3)；
For storing the high pressure gas cylinder (N) of high pressure gas, the high pressure gas cylinder (N) is connected to a gas by pneumatic operated valve eight (K8) Booster pump (M), the gas booster pump (M) are connected to pneumatic operated valve nine (K9) and pneumatic operated valve ten (K10) by pneumatic operated valve seven (K7) Junction, pneumatic operated valve seven (K7), pneumatic operated valve nine (K9), pneumatic operated valve ten (K10) junction pass through pneumatic operated valve six (K6) connect To the arrival end of the first mass flowmenter (H1).
5. gas-liquid injection imitation oil displacement experiment according to claim 4 and fluid property measurement device, which is characterized in that rock core folder Set device (A), the first back-pressure valve (B1), the second back-pressure valve (B2), oil-gas-water metering device (D), liquid piston container (E), liquid Receive 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 opaque seal box (G1) and the second opaque seal box (G2) are placed in insulating box (Q) In.
6. gas-liquid according to claim 5 injection imitation oil displacement experiment and fluid property measurement device, which is characterized in that described the One mass flowmenter (H1), the second mass flowmenter (H2), each pneumatic operated valve, each pressure sensor, each differential pressure pickup, insulating box (Q), each constant pressure constant speed pump, first light source (G3), second light source (G4), the first high power video camera (G7), the second high power video camera (G8), gas booster pump (M) is each coupled electrically to computer (W).
7. a kind of gas-liquid injection imitation oil displacement experiment and fluid property measuring method, the method use gas-liquid as claimed in claim 6 Inject imitation oil displacement experiment and fluid property measurement device carry out gas-liquid injection imitation oil displacement experiment experiment and to fluid property in rock core into Row measurement, comprising the following steps:
Step 1: three layers of heterogeneous saturated core are put into the sandwiched device of rock core (A), and liquid is fitted into liquid piston container (E), Gaseous species meet the design of the imitation oil displacement experiment experiment, first gas piston container (L1) and the second gas in high pressure gas cylinder (N) Piston in body piston container (L2) is located at top, and all pneumatic operated valves are in closed state, and computer (W) controls insulating box (Q) it is heated to imitation oil displacement experiment experiment preset temperature；Computer (W) controls first light source (G3) and second light source (G4) is opened, and It controls the first high power video camera (G7) and the second high power video camera (G8) is opened；
Step 2: computer (W) controls pneumatic operated valve eight (K8), pneumatic operated valve seven (K7), pneumatic operated valve ten (K10), pneumatic operated valve 16 (K16) it opens, the gas in high pressure gas cylinder (N) passes through gas booster pump (M) and pneumatic operated valve eight (K8), pneumatic operated valve seven (K7), gas Dynamic valve ten (K10) enters in first gas piston container (L1), when the piston in first gas piston container (L1) is pulled to bottom Portion, computer (W) controls pneumatic operated valve ten (K10) and pneumatic operated valve 16 (K16) is closed；Computer (W) controls pneumatic operated valve nine (K9) It is opened with pneumatic operated valve 17 (K17), the gas in high pressure gas cylinder (N) passes through booster pump (M) and pneumatic operated valve eight (K8), pneumatic operated valve seven (K7) enter in second gas piston container (L2) with pneumatic operated valve nine (K9), the piston quilt in second gas piston container (L2) Shift bottom onto, computer (W) controls pneumatic operated valve eight (K8), pneumatic operated valve seven (K7), pneumatic operated valve nine (K9) and pneumatic operated valve 17 (K17) It closes；
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 four (K4), pneumatic operated valve 13 (K13) and pneumatic operated valve 14 (K14) are opened, and computer (W) controls the first constant pressure constant speed pump (R1), the second constant pressure constant speed pump (R2) and third constant pressure constant speed pump (R3) are respectively to liquid piston container (E), first gas piston Container (L1), second gas piston container (L2) pressurization, when second pressure sensor (P2), third pressure sensor (P3) or the When the pressure value of four pressure sensors (P4) is equal with the pressure value of the first back-pressure valve (B1), computer (W) control is corresponding permanent Constant speed pump is pressed to stop；
Step 4: using gas-liquid alternating injection mode or gas-liquid while saturated core of the injection mode into 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 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 value calculates the kinematic viscosity of gas, liquid or gas-liquid mixture；Computer (W) controls pneumatic operated valve 18 (K18) A unlatching into pneumatic operated valve 24 (K24), the pressure of setting back-pressure valve (B2) are equal to the 5th pressure sensor (P7) Pressure value passes through the second high power video camera (G8) three layers of heterogeneous core fluid acquisition point corresponding with second light source (G4) observation (A2-A7) and the fluid flow state of rock core sandwiched device outlet (A8), also in conjunction with the second mass flowmenter (H2) and the second pressure The numerical value of gap sensor (P6) calculates the kinematic viscosity of the collection point fluid, the injection until meeting imitation oil displacement experiment experimental design Until time.
8. gas-liquid injection imitation oil displacement experiment according to claim 7 and fluid property measuring method, which is characterized in that step 4 In gas-liquid simultaneously injection mode the following steps are included:
Computer (W) controls pneumatic operated valve three (K3), pneumatic operated valve five (K5), pneumatic operated valve six (K6) and pneumatic operated valve ten (K10) and opens, meter Calculation machine (W) controls the first constant pressure constant speed pump (R1), the second constant pressure constant speed pump (R2) with the gas liquid ratio of imitation oil displacement experiment experimental design, note Enter speed injection liquids and gases, after meeting the injection length of imitation oil displacement experiment experimental design, computer (W) controls pneumatic operated valve three (K3), the first constant pressure constant speed pump (R1) and the are closed and stopped to pneumatic operated valve five (K5), pneumatic operated valve six (K6) and pneumatic operated valve ten (K10) Two constant pressure constant speed pumps (R2)；The pressure value and the first matter of computer (W) record first pressure sensor (P1) during the experiment The flow velocity and injection length of flowmeter (H1) aerated fluid are measured, and records oil, gas and water body in oil-gas-water metering device (D) in real time Product.
9. gas-liquid injection imitation oil displacement experiment according to claim 7 and fluid property measuring method, which is characterized in that step 4 In gas-liquid alternating injection mode include following steps alternately:
(1) when injecting liquid, computer (W) controls pneumatic operated valve three (K3), pneumatic operated valve four (K4) pneumatic operated valve five (K5) is opened, and calculates Machine (W) controls the first constant pressure constant speed pump (R1) and injects liquid with the speed of constant imitation oil displacement experiment experimental design, simulates when meeting After the injection length of oil displacement experiment design, computer (W) controls pneumatic operated valve five (K5) and closes, and stops the first constant pressure constant speed pump (R1)；Computer (W) records value, liquid injection length and the speed of the first pressure sensor (P1) when liquid injects simultaneously, The injection recorded by the liquid injection rate correction of the first mass flowmenter (H1) measurement by the first constant pressure constant speed pump (R1) Speed；
In injection liquid process, computer (W) controls pneumatic operated valve 13 (K13) simultaneously and pneumatic operated valve 14 (K14) is opened, and It is respectively compared the pressure of third pressure sensor (P3), the pressure value of the 4th pressure sensor (P4) and first pressure sensor (P1) The size of force value, i.e., when the pressure value of third pressure sensor (P3) is greater than the pressure value of first pressure sensor (P1), meter Calculation machine (W) controls pneumatic operated valve 11 (K11) and opens, and gas is discharged from the first evacuated tube (U1), until third pressure sensor (P3) it until pressure value of the pressure value equal to first pressure sensor (P1), closes pneumatic operated valve 11 (K11)；When third pressure When the pressure value of sensor (P3) is less than the pressure value of first pressure sensor (P1), computer (W) controls the second constant pressure constant speed It pumps (R2) to pressurize to first gas piston container (L1), until the pressure value of third pressure sensor (P3) is passed equal to first pressure Until the pressure value of sensor (P1), stop the pressurization of the second constant pressure constant speed pump (R2)；Equally, when the pressure of the 4th pressure sensor (P4) Force value is greater than the pressure value of first pressure sensor (P1), and computer (W) controls pneumatic operated valve 12 (K12) and opens, and gas is from the Two evacuated tubes (U2) discharge, until the pressure value of the 4th pressure sensor (P4) is equal to the pressure value of first pressure sensor (P1) Until, it closes pneumatic operated valve 12 (K12)；When the pressure value of the 4th pressure sensor (P4) is less than first pressure sensor (P1) When pressure value, computer (W) controls third constant pressure constant speed pump (R3) and pressurizes to second gas piston container (L2), until the 4th pressure Until pressure value of the pressure value of force snesor (P4) equal to first pressure sensor (P1), stop third constant pressure constant speed pump (R3) Pressurization, until liquid injection finishes；
(2) when injecting gas, computer (W) controls pneumatic operated valve three (K3), pneumatic operated valve six (K6) and pneumatic operated valve ten (K10) and opens, Computer (W) controls the second constant pressure constant speed pump (R2) and injects gas with the speed of imitation oil displacement experiment experimental design, drives when meeting simulation After the injection length of oily experimental design, computer (W) control pneumatic operated valve six (K6) and pneumatic operated valve ten (K10) close and stop second Constant pressure constant speed pump (R2)；The value of first pressure sensor (P1), gas injection rate when computer (W) records gas injection and Time is recorded by the gas injection rate correction of the first mass flowmenter (H1) measurement by the second constant pressure constant speed pump (R2) Injection rate；
In injection gas process, computer (W) compares the pressure value and first pressure sensor of the 4th pressure sensor (P4) (P1) size of pressure value, when the pressure value of the 4th pressure sensor (P4) is greater than the pressure of first pressure sensor (P1) Value, computer (W) control pneumatic operated valve 12 (K12) and open, and gas is discharged from the second evacuated tube (U2), until the 4th pressure sensing Until pressure value of the pressure value of device (P4) equal to first pressure sensor (P1), close pneumatic operated valve 12 (K12)；When the 4th pressure The pressure value of force snesor (P4) is less than the pressure value of first pressure sensor (P1), and computer (W) controls third constant pressure constant speed It pumps (R3) to pressurize to second gas piston container (L2), until the pressure value of the 4th pressure sensor (P4) is passed equal to first pressure Until the pressure value of sensor (P1), stop third constant pressure constant speed pump (R3) pressurization, is finished until gas injects, or work as first gas When gas volume is finished in piston container (L1), computer (W) controls pneumatic operated valve nine (K9) and opens, and controls pneumatic operated valve ten (K10) The second constant pressure constant speed pump (R2) is closed and stops, computer (W) controls third constant pressure constant speed pump (R3) with same imitation oil displacement experiment The speed of experimental design continues to inject gas, and after meeting the injection length of imitation oil displacement experiment experimental design, computer (W) controls gas Dynamic valve six (K6) and pneumatic operated valve nine (K9) close and stop third 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 passes The size of the pressure value of sensor (P1), when the pressure value of second pressure sensor (P2) is greater than the pressure of first pressure sensor (P1) When force value, computer (W) controls pneumatic operated valve two (K2) and opens, and surplus liquid is discharged into the first Liquid acquisition container (F1), directly Until pressure value of the pressure value of second pressure sensor (P2) equal to first pressure sensor (P1), pneumatic operated valve two 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 Until the pressure value of one pressure sensor (P1), stop the first constant pressure constant speed pump (R1), until gas injection finishes.
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