CN116429639A - Experimental device and monitoring method for measuring tackifying performance of capsule polymer - Google Patents
Experimental device and monitoring method for measuring tackifying performance of capsule polymer Download PDFInfo
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- CN116429639A CN116429639A CN202310363551.3A CN202310363551A CN116429639A CN 116429639 A CN116429639 A CN 116429639A CN 202310363551 A CN202310363551 A CN 202310363551A CN 116429639 A CN116429639 A CN 116429639A
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- 229920000642 polymer Polymers 0.000 title claims abstract description 78
- 239000002775 capsule Substances 0.000 title claims abstract description 73
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000012544 monitoring process Methods 0.000 title claims abstract description 27
- 239000012530 fluid Substances 0.000 claims abstract description 31
- 230000008859 change Effects 0.000 claims abstract description 21
- 238000013508 migration Methods 0.000 claims abstract description 19
- 230000005012 migration Effects 0.000 claims abstract description 19
- 230000008569 process Effects 0.000 claims abstract description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 95
- 239000004576 sand Substances 0.000 claims description 92
- 239000007788 liquid Substances 0.000 claims description 30
- 238000010438 heat treatment Methods 0.000 claims description 22
- 238000002347 injection Methods 0.000 claims description 16
- 239000007924 injection Substances 0.000 claims description 16
- 239000000523 sample Substances 0.000 claims description 12
- 230000008719 thickening Effects 0.000 claims description 11
- 238000002474 experimental method Methods 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 8
- 239000006004 Quartz sand Substances 0.000 claims description 7
- 230000035699 permeability Effects 0.000 claims description 7
- 239000002699 waste material Substances 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 230000001276 controlling effect Effects 0.000 claims description 3
- 239000003365 glass fiber Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000005429 filling process Methods 0.000 claims description 2
- 239000003921 oil Substances 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 8
- 238000006073 displacement reaction Methods 0.000 abstract description 6
- 230000001960 triggered effect Effects 0.000 abstract description 6
- 239000010779 crude oil Substances 0.000 abstract description 2
- 238000011161 development Methods 0.000 abstract description 2
- 238000011084 recovery Methods 0.000 abstract description 2
- 238000011160 research Methods 0.000 description 7
- 230000001965 increasing effect Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 230000032683 aging Effects 0.000 description 4
- 229920006395 saturated elastomer Polymers 0.000 description 4
- 229910000619 316 stainless steel Inorganic materials 0.000 description 3
- 239000008398 formation water Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000008346 aqueous phase Substances 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000004816 latex Substances 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention relates to the technical field of oil and gas field development engineering, and discloses an experimental device and a monitoring method for measuring tackifying performance of a capsule polymer. The capsule polymer is triggered by temperature, the wrapped polymer molecules are released, the dynamic increase of solution viscosity is realized, the fluid property at a specific position is timely collected and analyzed by monitoring the on-way resistance change of a pipeline in real time, the accurate triggering time and the optimal triggering temperature of the capsule polymer can be obtained, the tackifying process and the oil displacement effect of the capsule polymer under the conditions of long time and large distance can be more accurately simulated, and the performance change of the capsule polymer in dynamic migration and the influence of the capsule polymer on the improvement of the crude oil recovery ratio are further researched.
Description
Technical Field
The invention relates to the technical field of oil and gas field development engineering, in particular to an experimental device and a monitoring method for measuring tackifying performance of a capsule polymer.
Background
Polymer flooding is an important technology for improving crude oil recovery by increasing aqueous phase viscosity, however, conventional polymer flooding suffers from high injection pressure and low deep wave extent when developing medium-low permeability reservoirs. The heat-triggered capsule polymer studied for the above problems can temporarily bind polymer latex particles in the capsule, and when the temperature reaches the trigger response temperature, the capsule shell is destroyed, and the wrapped polymer molecules are converted from the bound state to the stretched state, thereby increasing the aqueous phase viscosity. The delayed tackifying characteristic of the thermally triggered capsule polymer can meet the requirement of deep profile control of medium-low permeability oil reservoirs.
The viscosity of the encapsulating polymer is a dynamic increasing process when triggered by temperature. The current common research mode is to put the capsule polymer in a sealed glass container, and research the tackifying effect of the capsule polymer at different trigger temperatures through a static aging mode. On one hand, the research mode cannot monitor the tackifying process of the capsule polymer in real time; on the other hand, the method has a large difference from the tackifying effect of the capsule polymer in the stratum flowing process, the actual stratum cannot be accurately simulated, and the feasibility of the actual application of the capsule polymer cannot be accurately estimated. In the seepage research of the traditional chemical agent, the most commonly used simulation models are a one-dimensional sand filling pipe model and a core model, but the adopted models are generally smaller in size, shorter in seepage time and single in simulation temperature, and are difficult to study the triggering effect of the capsule polymer at different temperatures and describe the dynamic migration and tackifying processes of the capsule polymer in an oil reservoir.
Therefore, in order to more accurately study the tackifying process of the capsule polymer in the stratum, an experimental device capable of simulating long-time and large-distance migration of the capsule polymer in the oil reservoir needs to be manufactured, and further, the change of the dynamic tackifying performance of the capsule polymer and the influence of the dynamic tackifying performance on the oil displacement efficiency are studied.
Disclosure of Invention
In order to more accurately simulate the dynamic migration process of the capsule polymer in the stratum and research the tackifying performance of the capsule polymer, the invention provides an experimental device for measuring the tackifying performance of the capsule polymer, which comprises the following steps: a fluid injection system, a fluid migration and liquid amount acquisition system, a temperature regulation system and a pressure monitoring system,
the fluid injection system comprises a liquid storage bottle, a high-pressure high-precision plunger pump, a connecting pipeline, a three-way valve, an intermediate container A, an intermediate container B and a high-pressure six-way valve, wherein,
the liquid storage bottle, the high-pressure high-precision plunger pump, the three-way valve, the intermediate container and the high-pressure six-way valve are sequentially connected through pipelines, the intermediate container A and the intermediate container B are connected in parallel and connected into the injection system, and liquid contained in the intermediate container A is pumped into the fluid migration and liquid amount acquisition system through the high-pressure high-precision plunger pump;
the fluid migration and liquid amount collection system comprises a plurality of sand filling pipe models, a model fixing base, a diversion interface, a straight-through valve, a waste liquid collector and a connecting pipeline, wherein,
the sand filling pipe models are all arranged on the fixed base and are sequentially connected in series by pipelines;
the temperature regulating system comprises a temperature controller, a temperature probe and a high-temperature resistant heating belt, wherein,
the high-temperature-resistant heating belt is uniformly wound on the sand filling pipe model, the port of the high-temperature-resistant heating belt is connected with the temperature controller, the temperature probe is positioned between the high-temperature-resistant heating belt and the outer wall of the sand filling pipe model, and the temperature probe is connected with the temperature controller;
the pressure monitoring system comprises a pressure sensor A, a pressure sensor B in a sand filling pipe model, a pressure collecting box and a computer, wherein,
each pressure sensor is connected with a pressure acquisition box, and the pressure acquisition box is connected with a computer.
In one embodiment, the outlet port of the intermediate container A and the outlet port of the intermediate container B are connected to the high-pressure six-way valve by connecting pipelines, and the pressure sensor A is directly connected to the interface of the high-pressure six-way valve.
In one embodiment, the interfaces at two ends of the sand filling pipe model are flange type or spiral type, the pressure sensor interfaces are arranged above the sand filling pipe model, the flow guiding interfaces are arranged below the sand filling pipe model, each interface is provided with an internal thread plug, the inside of the sand filling pipe model is roughened, the inner diameter range is 10-50 mm, the length range is 100-2000 mm, and the highest bearing pressure is 20MPa.
In one embodiment, the connecting lines are made of 316 and 316L stainless steel.
In one embodiment, the diversion interface is connected to a pass-through valve.
In one embodiment, the high-temperature-resistant heating belt is made of glass fiber, the width of the heating belt is 30-50 mm, and the length of the heating belt is 1-20 m.
In one embodiment, the number of sand filling pipe models is 1-30, the maximum fluid migration system can reach 60 meters, and the lengths of the sand filling pipes adopted in a single experiment are required to be the same.
In one embodiment, the mesh range of quartz sand particles added in the sand filling pipe model should be consistent, the mass of quartz sand particles used in all sand filling pipes in a single experiment should be the same, and the pressure applied in the sand filling process of the sand filling pipes should be the same so as to ensure the consistency of the permeability of porous media in the sand filling pipes.
According to a first aspect of the disclosed embodiments of the present invention, there is provided a monitoring method suitable for the above experimental device for measuring the viscosity increasing ability of a polymer capsule, the method comprising:
step 1: independently controlling and monitoring the temperature inside each sand filling pipe in real time by using a temperature regulating system;
step 2: monitoring the pressure change of the sand filling pipe model along the process in real time by using a pressure monitoring system, and transmitting the monitored data to a computer;
step 3: and acquiring the fluid at different positions of the sand filling pipe in real time by using a fluid migration system, and detecting and analyzing the related properties of the fluid in time.
Advantageous effects
The invention provides an experimental device and a monitoring method for measuring tackifying performance of a capsule polymer. The beneficial effects are as follows:
(1) The model is formed by connecting a plurality of sand filling pipes in series, the displacement length can be adjusted according to the requirements, the problem that the seepage distance of a conventional sand filling pipe experiment or a core experiment is short is solved, and the change of the dynamic performance of the thermally triggered capsule polymer in the flowing process of a porous medium can be more embodied.
(2) Each sand filling pipe can be independently provided with temperature according to experimental requirements, compared with the defect of single temperature of conventional displacement experiments, the viscosity increasing effect of the capsule polymer at different temperatures can be more accurately researched and compared, and the suitable oil reservoir temperature range can be more easily determined.
(3) The change of the tackifying performance is reflected by the pressure change, so that the real-time monitoring of the dynamic tackifying performance of the capsule polymer can be realized.
(4) Each sand filling pipe is internally provided with a liquid amount acquisition interface, fluctuation characteristics brought by pressure change can be analyzed in time by detecting the property of produced liquid, and the problem that the pressure change of a polymer cannot be accurately interpreted in the displacement process is solved.
(5) The experimental result obtained by the experimental device can be compared with the research result obtained by the static aging experiment, so that the experimental mode of researching the physical change of the thermally triggered capsule polymer is enriched.
Drawings
FIG. 1 is a schematic diagram of an experimental device for measuring the tackifying performance of a polymer capsule according to the invention;
FIG. 2 is a schematic illustration of a single sand pack pattern according to the present invention;
FIG. 3 is a schematic diagram of an experimental setup for studying the optimal trigger temperature of a capsule polymer;
FIG. 4 is a schematic diagram of an experimental apparatus for studying the exact trigger time of a capsule polymer;
in the figure: the device comprises a 1-liquid storage bottle, a 2-high-pressure high-precision plunger pump, a 3-connecting pipeline, a 4-three-way valve, a 5-intermediate container A, a 6-intermediate container B, a 7-high-pressure six-way valve, an 8-pressure sensor A, a 9-model fixing base, a 10-sand filling pipe model, a 11-connecting pipeline, a 12-temperature controller, a 13-temperature probe, a 14-pressure collecting box, a 15-computer, a 16-waste liquid collector, a 17-diversion interface, an 18-high-temperature-resistant heating belt, a 19-pressure sensor interface, a 20-pressure sensor B and a 21-straight-through valve.
Detailed Description
All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1 to 4, the present invention provides a technical solution: an experimental device and a monitoring method for measuring tackifying performance of a capsule polymer.
In order to make the present application more apparent to a researcher skilled in the art, the entire connection of the present invention will be described in detail with reference to fig. 1 and 2 by way of specific embodiments.
In order to more accurately simulate the dynamic migration process of the capsule polymer in the stratum and research the tackifying performance of the capsule polymer, the invention provides an experimental device for measuring the tackifying performance of the capsule polymer, which comprises the following steps:
the system comprises a liquid storage bottle 1, a high-pressure high-precision plunger pump 2, a three-way valve 4, an intermediate container A5, an intermediate container B6 and a high-pressure six-way valve 7, and a connecting pipeline 3, wherein the liquid storage bottle 1, the high-pressure high-precision plunger pump 2, the three-way valve 4, the intermediate container and the high-pressure six-way valve 7 are sequentially connected by the pipeline 3, the intermediate container A5 and the intermediate container B6 are connected in parallel to the injection system, the liquid outlet end of the intermediate container A5, the liquid outlet end of the intermediate container B6 and the pressure sensor A8 are connected to the interface of the high-pressure six-way valve 7, and liquid in the intermediate container is pumped into the system by the high-pressure high-precision plunger pump 2; it should be further noted that, the liquid in the liquid storage bottle 1 is distilled water; the flow speed range of the high-pressure high-precision plunger pump 2 is 0.00001-408 ml/min, the working pressure is normal pressure to 206.8MPa, and the flow speed precision is 0.5% of the flow speed set value; wherein the volume of the intermediate container A5 and the intermediate container B6 is 1015ml; the three-way valve 4 can control the flow path of fluid in the pump, and can independently displace the solution in one intermediate container or simultaneously displace the solution in two intermediate containers.
The fluid migration and liquid amount collection system comprises a plurality of sand filling pipe models 10, a model fixing base 9, a flow guiding interface 17, a straight-through valve 21, a waste liquid collector 16 and a connecting pipeline 11, wherein the sand filling pipe models are required to be arranged on the model fixing base 9 and are sequentially connected in series through the connecting pipeline 11, a pressure sensor interface 19 is arranged above each sand filling pipe model 10, the flow guiding interface 17 is arranged below each sand filling pipe model 10, and quartz sand particles are arranged inside each sand filling pipe model; it should be further noted that, after the fluid injected into the pipeline flows out through the high-pressure six-way valve 7, the fluid sequentially passes through the sand filling pipe model 10 connected in series, and finally is collected and treated by the waste liquid collector 16; the liquid flowing through the sand filling pipe model can be collected in real time by adjusting the opening and closing of the flow guiding interface straight-through valve 21 at the lower part of the sand filling pipe model 10.
The temperature regulation system comprises a temperature controller 12, a temperature probe 13 and a high-temperature-resistant heating belt 18, wherein the high-temperature-resistant heating belt 18 is uniformly wound on the sand filling pipe model 10, the port of the high-temperature-resistant heating belt is connected with the temperature controller 12, the temperature probe 13 is positioned between the high-temperature-resistant heating belt 18 and the outer wall of the sand filling pipe model 10, and the temperature probe 13 is connected with the temperature controller 12; it should be further noted that each sand pack model is controlled by an independent thermostat.
The pressure monitoring system comprises a pressure sensor A8, a plurality of pressure sensors B20 in the sand filling pipe model, a pressure collecting box 14 and a computer 15, wherein each pressure sensor is connected with the pressure collecting box 14 and is used for collecting the pressure of each pressure measuring point in real time, and the pressure collecting boxes are connected with the computer through data lines; it should be further noted that, the measuring range of the pressure sensor is-100 kPa-50 MPa, and the accuracy of the pressure sensor is 0.1%; the pressure sensor B20 in the sand filling pipe model is connected with the pressure sensor interface 19 of the sand filling pipe model, and when the pressure measurement is not needed at a certain pressure sensor interface, an external thread plug is needed for sealing; the pressure sensor A8 is used for monitoring the change of the total injection pressure of the pipeline in real time when the fluid flows through the high-pressure six-way valve 7, and the pressure sensor B20 is used for monitoring the pressure change when the fluid flows through the local fluid flow when the fluid flows through each pressure measuring point inside the sand filling pipe.
In one embodiment, the injection system connecting pipeline 3 is made of 316L stainless steel, and the connecting pipeline 11 between sand filling pipe models is made of 316 stainless steel.
In one embodiment, the high temperature resistant heating belts 18 are made of glass fiber, and each high temperature resistant heating belt 18 has a width of 30mm and a length of 3m, and has a temperature resistance of up to 450 ℃.
In one embodiment, the sand filling pipe mold 10 is made of 304 metal, the connectors at two ends are spiral, the inner wall of the sand filling pipe mold is roughened, the inner diameter range is 25mm, the length range is 1000mm, the highest bearing pressure is 20MPa, it is further pointed out that 1 pressure sensor connector is installed at the upper part of each sand filling pipe mold, and 1 flow guiding connector is installed at the lower part of each sand filling pipe mold.
In one embodiment, the number of sand filling pipes is 10, the length of the fluid migration system is 10 meters, and the lengths of the sand filling pipes adopted in a single experiment are all the same.
In one embodiment, the number of the quartz sand particles added in the sand filling pipe model 10 is 100-120 mesh, and the mass of the quartz sand particles used in each sand filling pipe is the same in a single experiment and the pressure applied in the process of filling the sand filling pipe is the same, and it should be further pointed out that the pressurizing force of the sand filling pipe is controlled by the sand filling pipe compacting device.
According to a first aspect of the disclosed embodiments of the present invention, there is provided a monitoring method suitable for the above experimental device for measuring the thickening property of a polymer capsule, the method comprising:
step 1: independently controlling and monitoring the temperature inside each sand filling pipe in real time by using a temperature regulating system;
step 2: monitoring the pressure change of the sand filling pipe model along the process in real time by using a pressure monitoring system, and transmitting the monitored data to a computer;
step 3: and acquiring the fluid at different positions of the sand filling pipe in real time by using a fluid migration system, and detecting and analyzing the related properties of the fluid in time.
In order to make the object and operation flow of the present invention more apparent, the present invention will be described in detail with reference to fig. 1 to 4.
When the invention works, if the tackifying effect of the rapid thermal triggering type capsule polymer at different temperatures is to be studied, firstly vacuumizing the sand filling pipe model 10, performing saturated simulated formation water treatment, and calculating the porosity and permeability of the sand filling pipe model 10; then filling the capsule polymer into an intermediate container A5, closing a valve leading to an intermediate container B6, setting the temperature of a sand filling pipe model connected with a high-pressure six-way valve 7 as the lowest temperature, setting the sand filling pipe model connected with a waste liquid collector 16 as the highest temperature, gradually increasing the temperature of a pipeline migration system from low to form a temperature change zone, starting a high-pressure high-precision plunger pump 2 when the temperature detected by a temperature probe reaches the set temperature, setting a certain flow rate, injecting the capsule polymer into the sand filling pipe model 10, then acquiring the pressure change of each pressure measuring point in real time by using a pressure acquisition box 14, acquiring the pressure change characteristic of the capsule polymer when the capsule polymer flows through the sand filling pipe model at different temperatures in real time by a computer, acquiring flowing solutions at different positions by a diversion interface 17 after the pressure of each pressure measuring point is stable, and detecting and analyzing the triggering and tackifying degree of the capsule polymer at different positions of the sand filling pipe model, thereby determining the optimal triggering temperature of the capsule polymer. Wherein, fig. 3 is a schematic diagram of an experimental apparatus for researching the optimal trigger temperature of the capsule polymer.
When the invention works, if the dynamic thickening performance of the capsule polymer is to be researched at a certain temperature, firstly vacuumizing the sand filling pipe model 10, carrying out saturated simulated formation water treatment, and calculating the porosity and permeability of the sand filling pipe model 10; then filling the capsule polymer into an intermediate container A5, closing a valve leading to an intermediate container B6, setting each high-temperature-resistant heating belt 18 to be at the same temperature, starting a high-pressure high-precision plunger pump 2 when the temperature detected by a temperature probe 13 reaches the set temperature, injecting the capsule polymer into a sand filling pipe model 10 by setting a series of injection flow rates, then collecting the pressure change of each pressure measuring point in real time by using a pressure collecting box 14, recording the change of the pressure along the sand filling pipe model in real time by a computer, collecting the solutions flowing through different positions by a diversion interface 17 after the pressure of each pressure measuring point is stable, detecting and analyzing the change of the dynamic tackifying performance of the capsule polymer at different positions of the sand filling pipe model, and obtaining the targeted tackifying position and the tackifying effect of the capsule polymer at a certain temperature under different injection flow rates by experimental tests. Wherein, fig. 4 is a schematic diagram of an experimental device for researching the accurate triggering time of the capsule polymer in the porous medium.
When the invention works, if the influence of the dynamic tackifying performance of the capsule polymer on the oil displacement effect is to be studied, firstly vacuumizing the sand filling pipe model 10, performing saturated simulated formation water treatment, calculating the porosity and permeability of the sand filling pipe model 10, then performing saturated simulated oil treatment on the whole sand filling pipe model 10, setting the high-temperature-resistant heating belt 18 to be uniform temperature, and fully aging the simulated oil at the trigger temperature; after the ageing is finished, the capsule polymer and the simulated stratum are respectively filled into the middle container A5 and the middle container B6, the valve leading to the middle container A5 is closed, the valve leading to the middle container B6 is opened, the high-pressure high-precision plunger pump 2 is opened, a certain flow rate is set, the simulated stratum water is injected into the sand filling pipe model 10 and driven until the water content reaches 98%, the valve leading to the middle container B6 is closed, the valve flowing through the middle container A5 is opened, the injection flow rate is set according to the time required by triggering the tackifying of the capsule polymer, the capsule polymer is injected into the sand filling pipe model 10, the along-path pressure change in the sand filling pipe model 10 is monitored in real time through the pressure sensor, and the effluent is collected in real time through the model terminal collecting device, so that the influence of the dynamic tackifying performance of the capsule polymer on the efficiency of the capsule polymer is studied, and in the process, the optimal injection multiple of the capsule polymer can be obtained by setting a series of injection multiple of the capsule polymer and researching the influence of the injection quantity of the capsule polymer on the efficiency of the capsule polymer.
Although embodiments of the present invention have been shown and described, it will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.
Claims (9)
1. An experimental set-up for measuring the thickening power of a polymer in capsules, comprising: a fluid injection system, a fluid migration and liquid amount acquisition system, a temperature regulation system and a pressure monitoring system,
the fluid injection system comprises a liquid storage bottle (1), a high-pressure high-precision plunger pump (2), a connecting pipeline (3), a three-way valve (4), an intermediate container A (5), an intermediate container B (6) and a high-pressure six-way valve (7), wherein the liquid storage bottle (1), the high-pressure high-precision plunger pump (2), the three-way valve (4), the intermediate container and the high-pressure six-way valve (7) are sequentially connected through the pipeline (3), the intermediate container A (5) and the intermediate container B (6) are connected in parallel and connected into the injection system, and liquid filled in the intermediate container A and the intermediate container B is pumped into a fluid migration and liquid amount collection system through the high-pressure high-precision plunger pump (2);
the fluid migration and liquid amount collection system comprises a plurality of sand filling pipe models (10), a model fixing base (9), a diversion interface (17), a through valve (21), a waste liquid collector (16) and a connecting pipeline (11), wherein the sand filling pipe models (10) are all arranged on the fixing base (9) and are sequentially connected in series by the pipeline (11);
the temperature regulating system comprises a temperature controller (12), a temperature probe (13) and a high-temperature resistant heating belt (18), wherein,
the high-temperature-resistant heating belt (18) is uniformly wound on the sand filling pipe model (10), the port of the high-temperature-resistant heating belt is connected with the temperature controller (12), the temperature probe (13) is positioned between the high-temperature-resistant heating belt (18) and the sand filling pipe model (10), and the temperature probe (13) is connected with the temperature controller (12);
the pressure monitoring system comprises a pressure sensor A (8), a plurality of sand filling pipe model internal pressure sensors B (20), a pressure collecting box (14) and a computer (15), wherein,
each pressure sensor is connected with a pressure collecting box (14), and the pressure collecting box (14) is connected with a computer (15).
2. An experimental device for measuring the thickening performance of a polymer capsule according to claim 1, wherein the outlet port of the intermediate container a (5) and the outlet port of the intermediate container B (6) are connected to the high-pressure six-way valve (7) through a connecting pipeline (3), and the pressure sensor a (8) is directly connected to the interface of the high-pressure six-way valve (7).
3. The experimental device for measuring the thickening performance of the capsule polymer according to claim 1, wherein the interfaces at two ends of the sand filling pipe model (10) are flange type or spiral type, a pressure sensor interface (19) is arranged above the sand filling pipe model (10), a flow guiding interface (17) is arranged below the sand filling pipe model, each interface is provided with an internal thread plug, the inside of the sand filling pipe model is roughened, the inner diameter is 10-50 mm, the length is 100-2000 mm, and the highest bearing pressure is 20MPa.
4. An experimental device for measuring the thickening properties of a polymer capsule according to claim 1, wherein the connecting lines are made of 316 and 316L stainless steel.
5. An experimental device for measuring the thickening properties of a polymer capsule according to claim 1, wherein the flow-guiding interface (17) is connected to a through valve (21).
6. The experimental device for measuring the thickening performance of a polymer capsule according to claim 1, wherein the high-temperature-resistant heating belt (18) is made of glass fiber, the width of the high-temperature-resistant heating belt (18) is 30-50 mm, and the length is 1-20 m.
7. An experimental device for measuring the thickening performance of a polymer capsule according to claim 1, wherein the number of sand filling pipe models (10) is 1-30, the maximum fluid migration system can reach 60 meters, and the lengths of the sand filling pipes adopted in a single experiment are the same.
8. An experimental device for measuring the thickening performance of a polymer capsule according to claim 1, wherein the mesh range of quartz sand particles added in the sand filling pipe model (10) is consistent, the mass of quartz sand particles used in all sand filling pipes in a single experiment is the same, and the pressure applied in the filling process of the sand filling pipes is the same, so that the consistency of the permeability in the sand filling pipes is ensured.
9. A method of monitoring an experimental device for measuring the thickening properties of a polymer capsule according to claim 1, comprising:
step 1: independently controlling and monitoring the temperature inside each sand filling pipe in real time by using a temperature regulating system;
step 2: monitoring the pressure change of the sand filling pipe model along the process in real time by using a pressure monitoring system, and transmitting the monitored data to a computer;
step 3: and acquiring the fluid at different positions of the sand filling pipe in real time by using a fluid migration system, and detecting and analyzing the related properties of the fluid in time.
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| CN117924751A (en) * | 2024-03-21 | 2024-04-26 | 中国石油大学(华东) | Preparation method of polymer capsule |
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2023
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117924751A (en) * | 2024-03-21 | 2024-04-26 | 中国石油大学(华东) | Preparation method of polymer capsule |
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