CN114088879A - Carbon dioxide water-based three-phase foam internal phase evolution and cooperative plugging regulation testing device and application thereof - Google Patents
Carbon dioxide water-based three-phase foam internal phase evolution and cooperative plugging regulation testing device and application thereof Download PDFInfo
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Abstract
The invention discloses a carbon dioxide water-based three-phase foam internal phase evolution and cooperative plugging regulation testing device and application thereof. The testing device comprises a solid dispersion phase evolution module, a bubble dispersion phase evolution module and an internal phase coordination and blockage visualization module, wherein the solid dispersion phase evolution module is used for introducing a solid dispersion phase, the bubble dispersion phase evolution module is used for generating a bubble dispersion phase, and the internal phase coordination and blockage visualization module is used for observing the interaction process of coordination and blockage in three-phase foam. The testing device can master CO2The evolution process of the bubble dispersion phase and the solid dispersion phase researches the evolution law of the internal phase of the three-phase foam, can simulate the cooperative plugging regulation effect of the internal phase in a reservoir, and supports the analysis of the water-controlling and oil-stabilizing mechanism of the three-phase foam, thereby providing theoretical support for the on-site profile control and water plugging operation of an oil field.
Description
Technical Field
The invention relates to a carbon dioxide water-based three-phase foam internal phase evolution and cooperative plugging regulation testing device and application thereof, and belongs to the technical field of carbon sequestration, utilization and oil gas exploitation.
Background
Most old oil fields in China are developed by long-term water flooding and gradually enter a high water-cut period and even an extra high water-cut period. The water content of the oil well rises, the dominant channel is gradually formed, the phenomena of water channeling among oil wells and water flooding of the oil well are serious, ineffective circulation of injected water is increasingly intensified, and the adoption of efficient profile control and water plugging technological measures becomes the key for improving the development effect of the oil reservoir in the high water-cut period.
The foam profile control water shutoff technology is proved to be an effective means for controlling water, stabilizing oil and improving the development effect of an oil field. The foam has selective plugging properties of large plugging without small plugging and water plugging without oil plugging, and the foam has small damage to a reservoir, so that the foam is a clean plugging modifier with excellent performance. Especially with CO2The system is an internal phase water-based foam plugging regulating system, can improve the crude oil recovery rate through foam plugging regulation, and can also regulate CO2And sealing the carbon in the stratum to achieve the purposes of carbon utilization and geological sealing. However, the foam fluid is a natural thermodynamically unstable system, and is easy to break and lose plugging capability under severe reservoir conditions such as high temperature and hypersalinity. In addition, the foam liquid film is relatively soft, and strong plugging is difficult to form for the dominant channel. The method of adding solid particles into the foam to form three-phase foam can better strengthen the foam plugging regulating effect. For example, in the 2012 1 st phase of the journal for oil and gas geology and recovery, a document of 'deep profile control experimental research of a multiphase foam system' published by plum-mega-sensitive et al is recorded, and an experimental result shows that a gel microsphere and foam composite system is used as a profile control agent for a high-water-content oil reservoir, the gel microsphere and foam have good compatibility, the displacement pressure difference is increased in the injection process of the multiphase foam system, a channeling channel is effectively blocked, and the recovery rate of crude oil is increased.
Different from traditional gasLiquid two phase foam, CO2The plugging regulating mechanism of the water-based three-phase foam system is more complicated. The solid dispersion phase and the bubble dispersion phase both evolve in the migration process of the porous medium, and differential plugging behaviors are generated for pore throats of reservoirs at different depths. Meanwhile, a synergistic plugging effect may be generated between the solid dispersion phase and the bubble dispersion phase, and interaction of gas, liquid and solid phases in the porous medium is complex under the conditions of different solid dispersion phase particle sizes, bubble particle sizes, foam quality, seepage velocity and the like. Therefore, the recognition of the three-phase foam plugging regulation performance and the internal phase evolution and action rule thereof provides a new challenge for the design of experimental devices. At present, the plugging adjusting effect of three-phase foam is mainly researched by adopting a conventional rock core displacement experiment, the plugging adjusting effect of the three-phase foam is reflected by macroscopic parameters such as displacement pressure difference, water content, recovery ratio and the like, and CO cannot be adjusted2Visual analysis of the water-based three-phase foam plugging regulating behavior shows that the evolution behavior in the three-phase foam is not clearly known, and the synergistic plugging regulating action mechanism between the hard ball like solid dispersion phase particles and the soft ball like air bubbles is not clear.
Disclosure of Invention
The invention aims to provide CO2The testing device for the phase evolution and the coordinated plugging regulation in the water-based three-phase foam overcomes the difficulty that the conventional device is difficult to probe the coordinated plugging regulation rule in the three-phase foam under the visual condition.
The testing device can master CO2The evolution process of the bubble dispersion phase and the solid dispersion phase researches the evolution law of the internal phase of the three-phase foam, can simulate the cooperative plugging regulation effect of the internal phase in a reservoir, and supports the analysis of the water-controlling and oil-stabilizing mechanism of the three-phase foam, thereby providing theoretical support for the on-site profile control and water plugging operation of an oil field.
CO provided by the invention2The device for testing the phase evolution and coordinated plugging regulation effect in the water-based three-phase foam comprises a solid dispersion phase evolution module, a bubble dispersion phase evolution module and an internal phase coordinated plugging regulation visualization module which are all arranged in a cavity formed by a top clamping shell and a bottom clamping shell and are fixed on the bottom clamping shell;
the top layer clamping shell and the bottom layer clamping shell are both provided with confining pressure liquid inlet and outlet pipes, and confining pressure liquid loads confining pressure on each module through a confining pressure cavity communication port;
top windows are arranged on the top clamping shell at corresponding positions of the solid dispersed phase evolution module, the bubble dispersed phase evolution module and the inner-phase coordinated plugging visualization module;
bottom windows are arranged on the bottom clamping shell at corresponding positions of the solid dispersed phase evolution module, the bubble dispersed phase evolution module and the inner-phase coordinated plugging visualization module;
the solid dispersion phase evolution module comprises a solid dispersion phase evolution chamber, a plurality of solid dispersion phase evolution areas are arranged in the solid dispersion phase evolution chamber, and two ends of each solid dispersion phase evolution area are respectively connected with a solid phase injection pipe and a solid phase outflow pipe;
the bubble dispersed phase evolution module comprises a bubble dispersed phase evolution chamber, a plurality of bubble dispersed phase evolution areas are arranged in the bubble dispersed phase evolution chamber, and two ends of the bubble dispersed phase evolution chamber are respectively connected with a bubble generating body and a bubble outflow pipe;
the inner cooperative blockage-adjusting visualization module comprises a main observation chamber, wherein a main observation chamber interaction area is arranged in the main observation chamber, one end of the main observation chamber interaction area is communicated with a main chamber injection pipe through a visible injection channel, and the other end of the main observation chamber interaction area is communicated with a main chamber outflow pipe;
a visible reverse outflow channel is arranged on one side of the visible injection channel and communicated with a reverse outflow pipe of the main chamber;
the main observation chamber is respectively communicated with the solid dispersion phase evolution module and the bubble dispersion phase evolution module through the main chamber injection pipe and the confluence valve.
CO as described above2In the water-based three-phase foam internal phase evolution and synergic plugging effect testing device, the solid dispersed phase evolution chamber, the bubble dispersed phase evolution chamber and the main observation chamber are all fixed on the bottom clamping shell by clamping plates.
CO as described above2In the testing device for phase evolution and synergic plugging regulation in water-based three-phase foam, a plurality of shearing cylinders with different sizes are arranged in a solid dispersion phase evolution area, so that shearing action with different degrees is applied to solid dispersion phase particles by controlling the distance between the shearing cylinders;
the shearing cylinders are arranged in rows perpendicular to the flow direction of the solid dispersion phase, the distance between the shearing cylinders in each row is 0.5-100 mu m, the distance between the shearing cylinders in each row is set based on the required shearing action strength, and the shearing cylinders in two adjacent rows are arranged in a staggered manner;
the solid dispersion phase is usually crosslinked polymer microspheres, water-swellable solid phase particles for oil field plugging.
CO as described above2In the water-based three-phase foam internal phase evolution and synergistic plugging regulation testing device, a plurality of bubble generating bodies are arranged in the bubble dispersion phase evolution chamber;
the bubble generating body comprises an airflow channel and a liquid flow channel, one end of the airflow channel is a gas injection port, the other end of the airflow channel is communicated with the liquid flow channel to form an 'h' shape, one end of the liquid flow channel is a liquid injection port, the other end of the liquid flow channel is communicated with the bubble dispersion phase evolution area, and CO is introduced into the bubble dispersion phase evolution area2Gas flows into the liquid flow channel through the gas injection port and the gas flow channel and is blocked under the impact of foaming liquid to form bubbles, namely bubble dispersion phases;
CO as described above2In the water-based three-phase foam internal phase evolution and synergetic blockage effect testing device, the width of the air flow channel is 1-500 mu m, the width of the liquid flow channel is 10-800 mu m, and the channels with different widths are arranged to quickly generate bubbles with different sizes;
the function of the bubble dispersion phase evolution area is to observe the evolution behaviors of gas diffusion, coalescence, liquid separation and the like among bubbles.
CO as described above2In the water-based three-phase foam internal phase evolution and synergetic plugging regulation testing device, the width of the visible injection channel is 10-1000 mu m, and the length is 1-10 cm;
the width of the visual reverse outflow channel is 10-1000 μm, and the length is 1-10 cm.
CO as described above2In the water-based three-phase foam internal phase evolution and synergetic plugging effect testing device, the interaction area of the main observation chamber is in a pore throat-crack network shape, wherein the width of a pore throat is 1-300 mu m, the width of a crack is 1-500 mu m, and the pore throat-crack network structure can be prepared by means of chemical etching and the like, and whether the crack is etched or not can be selected according to actual research conditions to be used for simulating the pore throat and the crack in a reservoir;
the side length of the interaction area of the main observation chamber is 3 cm-10 cm.
The interaction area of the main observation chamber is used for simulating and observing the coordinated blockage regulating effect in the three-phase foam.
CO as described above2In the water-based three-phase foam internal phase evolution and synergetic plugging regulation testing device, the solid dispersed phase evolution chamber, the bubble dispersed phase evolution chamber and the main observation chamber are formed by bonding an etching sheet and a cover sheet;
the top window and the bottom window are made of temperature-resistant and pressure-resistant glass.
The invention also provides a simulated CO2A method for coordinating and regulating the interaction in water-based three-phase foam comprises the following steps:
s1, mixing the CO2The pipe orifice of the water-based three-phase foam internal phase evolution and synergetic plugging effect testing device is connected to a high-pressure pipeline provided with a valve, one confining pressure liquid inlet pipe and one solid phase injection pipe high-pressure pipeline valve are opened, the other confining pressure liquid inlet pipe and the other main chamber outlet pipe are connected with a pressure gauge, other valves are closed, high-pressure liquid is introduced into the solid phase injection pipe to a set pressure, confining pressure liquid is introduced into the confining pressure liquid inlet pipe and the confining pressure liquid outlet pipe to the set pressure, pressure suppression treatment is carried out, the set pressure can be determined according to needs (usually 10 MPa-40 MPa), the working pressure is maintained for 30-40 minutes, and the qualified standard is no puncture and no leakage.
S2, selecting the bubble generating body with the corresponding size according to the requirement of the actual research purpose, and introducing CO into the gas injection port and the liquid injection port respectively2And foaming liquid, which is injectedThe gas injection port and the liquid injection port are closed; observing the evolution process of the bubbles after the generated bubbles flow into the bubble dispersion phase evolution area;
s3, selecting the corresponding solid dispersion phase evolution areas according to the requirements of actual research purposes, respectively injecting solid dispersion phase base liquid into the corresponding solid phase injection ports, and closing other solid phase injection ports during injection; observing the shear evolution process of the solid dispersed phase particles in the solid dispersed phase evolution area;
s4, simulating a three-phase foam internal phase coordinated blockage interaction process
For CO2Water-based three-phase foam profile control process: closing the valve of the main chamber reverse outflow pipe, and opening the valves of the main chamber injection pipe and the main chamber outflow pipe; CO 22Bubbles and solid dispersion phase particles enter the visual injection channel through the confluence valve and the main chamber injection pipe, and the interaction of single bubbles and single solid dispersion phase particles can be observed; CO 22The bubbles and the solid dispersion phase particles enter the interaction area of the main observation chamber after passing through the visual injection channel, and the solid dispersion phase particles and CO are observed2The synergistic plugging phenomenon of bubbles in pore throats and cracks is realized; CO 22Discharging bubbles and solid dispersed phase particles through the main chamber outflow pipe;
for CO2The water-based three-phase foam water plugging process comprises the following steps: closing the valve of the main chamber injection pipe, opening the valve of the main chamber reverse outflow pipe, and reversely displacing CO from the main chamber outflow pipe2Water-based three-phase foam, simulated CO2And in the process of reverse drainage and production after water plugging of the water-based three-phase foam, the interaction of single air bubbles and single solid dispersion phase particles can be observed through the visual reverse outflow channel.
After the completion, the pressure relief cleaning is carried out: and (4) removing the pressure, discharging residual gas and liquid, sequentially injecting clear water and nitrogen to clean the main observation chamber, the solid dispersion phase evolution chamber and the bubble dispersion phase evolution chamber, and storing after disassembly.
The testing device of the invention is researching CO2Evolution processes of bubble dispersion phase and solid dispersion phase, research of evolution law of internal phase of three-phase foam and simulation of internal phaseThe application in the synergistic plugging regulation in the reservoir also belongs to the protection scope of the invention.
The invention has the following beneficial technical effects:
(1) according to the invention, by designing the solid dispersion phase evolution module, the bubble dispersion phase evolution module and the internal coordination and blockage-regulating visualization module, the CO can be subjected to2The internal phase evolution process of the water-based three-phase foam and the synergistic plugging regulation effect thereof are visually and dynamically observed to support the analysis of the three-phase foam water-control and oil-stabilization mechanism, and the method has important significance for the popularization and application of the three-phase foam plugging regulation technology in high-water-content oil reservoirs
(2) The solid dispersion phase evolution module designed by the invention is provided with a plurality of solid dispersion phase evolution areas, and can exert shearing effects of different degrees on solid dispersion phase particles through shearing cylinders with different sizes, so that the simulation of the flowing shearing process of the solid dispersion phase particles in a pore throat is realized, and the solid phase dispersion phase evolution process is visually monitored, thereby accurately analyzing the regulating and blocking effects of the solid dispersion phase particles with different shearing degrees on a channeling channel.
(3) The device is provided with the multi-channel bubble generating body, can realize the rapid generation of bubbles with specific sizes, forms a foam system with specific gas-liquid ratio, simultaneously analyzes the evolution rules of bubble dispersion phases under different conditions, and provides the bubble dispersion phases with controllable sizes for the internal coordinated plugging regulation visualization module, thereby accurately analyzing the coordinated plugging regulation of interphase in different evolution degrees of three-phase foams.
Drawings
FIG. 1 is a CO of the present invention2Main view section of testing device for phase evolution and synergetic blocking effect in water-based three-phase foam
FIG. 2 is a CO of the present invention2Bottom surface structure diagram of water-based three-phase foam internal phase evolution and synergetic blockage regulation testing device
FIG. 3 is a CO of the present invention2The structure diagram of the inside of a solid dispersed phase evolution chamber in the water-based three-phase foam internal phase evolution and synergetic plugging regulation testing device.
FIG. 4 is a CO of the present invention2Air bubble in testing device for phase evolution and synergic blockage regulating effect in water-based three-phase foamThe structure diagram of the interior of the dephase evolution chamber.
FIG. 5 is a CO of the present invention2The structure diagram of the interior of a main observation chamber in the water-based three-phase foam internal evolution and synergetic plugging regulation testing device.
The respective symbols in the figure are as follows:
1. a top clamping shell, 2, a bottom clamping shell, 3, a top window, 4, a top window clamping shell, 5, a bottom window, 6, a bottom window clamping shell, 7, a sealing gasket, 8, a confining pressure liquid inlet and outlet pipe, 9, a two-way valve, 10, a fastening bolt, 11, a bubble dispersion phase evolution chamber, 12, a clamping plate, 13, a confining pressure cavity communication port, 14, a main observation chamber, 15, a confluence valve, 16, a solid phase injection pipe, 17, a pressure-resistant joint, 18, a solid phase outlet pipe, 19, a main chamber injection pipe, 20, a main chamber outlet pipe, 21, a main chamber reverse outlet pipe, 22, a liquid injection pipe, 23, a gas injection pipe, 24, a bubble outlet pipe, 25, a solid phase injection port, 26, a solid dispersion phase evolution zone, 27, a shear cylinder, 28, a solid phase outlet port, 29, a solid dispersion phase evolution chamber, 30, a bubble generation body, 31, 32, 33. gas flow channel, 34, liquid flow channel, 35, bubble dispersion phase evolution zone, 36, visual injection channel, 37, main observation chamber interaction zone, 38, main chamber outflow, 39, visual reverse outflow channel.
Detailed Description
The present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to the following embodiments.
CO provided by the invention2The overall structure schematic diagram of the testing device for the phase evolution and coordinated plugging regulation in the water-based three-phase foam is shown in fig. 1 and 2, and the testing device comprises an injection-production clamping module, a solid dispersed phase evolution module, a bubble dispersed phase evolution module and an internal phase coordinated plugging regulation visualization module.
As shown in fig. 1, the injection-production clamping module comprises a top clamping shell 1 and a bottom clamping shell 2 fixed by fastening bolts, and is used for clamping a solid dispersed phase evolution module, a bubble dispersed phase evolution module and an internal coordinated plugging visualization module; and the top layer clamping shell 1 and the bottom layer clamping shell 2 are respectively provided with a confining pressure liquid inlet and outlet pipe 8, and confining pressure liquid is used for loading confining pressure on each module through a confining pressure cavity communication port 13.
The solid dispersion phase evolution module, the bubble dispersion phase evolution module and the internal coordinated and blocked visualization module are all fixed on the bottom clamping shell 2 through the clamping plate 11, top windows 3 are arranged at corresponding positions of the solid dispersion phase evolution module, the bubble dispersion phase evolution module and the internal coordinated and blocked visualization module on the top clamping shell 1, the top windows 3 are fixed on the top clamping shell 1 through top window clamping shells 4, bottom windows 5 are arranged at corresponding positions of the solid dispersion phase evolution module, the bubble dispersion phase evolution module and the internal coordinated and blocked visualization module on the bottom clamping shell 2, and the bottom windows 5 are fixed on the bottom clamping shell 2 through bottom window clamping shells 6.
The solid dispersed phase evolution module comprises a solid dispersed phase evolution chamber, as shown in fig. 3, the solid dispersed phase evolution chamber is provided with a plurality of solid dispersed phase evolution areas 26, and two sides of each solid dispersed phase evolution area 26 are respectively provided with a solid phase injection port 25 and a solid phase outflow port 28; shearing cylinders 27 with different sizes are arranged in each solid dispersion phase evolution area 26, and shearing action with different degrees is exerted on solid dispersion phase particles by controlling the distance between the shearing cylinders 27; the shearing cylinders 27 in the solid dispersion phase evolution zone 26 are arranged according to rows, the spacing between the shearing cylinders in the rows is 0.5-100 μm, and the shearing cylinders between the rows are arranged in a staggered mode.
The bubble dispersed phase evolution module comprises a bubble dispersed phase evolution chamber 11, as shown in fig. 4, a bubble dispersed phase evolution area 35 is arranged in the bubble dispersed phase evolution chamber 11, and two sides of the bubble dispersed phase evolution area 35 are respectively communicated with the bubble generating body 30 and the bubble outflow pipe; a plurality of bubble generating bodies 30 are arranged, each bubble generating body 30 comprises an airflow channel 33 and a liquid flow channel 34, one end of each airflow channel 33 is provided with a gas injection port 32, the other end of each airflow channel 33 is communicated with the liquid flow channel 34 to form an 'h' -shaped structure, one end of each liquid flow channel 34 is provided with a liquid injection port 31, and the other end of each liquid flow channel 34 is communicated with a bubble dispersion phase evolution area 35. CO 22Gas flows into the liquid flow channel 34 through the gas injection port 32 and the gas flow channel 33, and is blocked to form bubbles under the impact of foaming liquid, namely, a bubble dispersion phase, the width of the gas flow channel 33 of the bubble generating body 30 is 1-500 mu m, the width of the liquid flow channel 34 is 10-800 mu m, and the channels with different widths are arranged to quickly generate bubblesThe same size of bubbles; the function of the bubble dispersion phase evolution area 35 is to observe the evolution behaviors of gas diffusion, coalescence, liquid separation and the like among bubbles.
The internal coordinated blockage-adjusting visualization module comprises a main observation chamber 14, as shown in fig. 2, the main observation chamber 14 is communicated with the solid dispersion phase evolution module and the bubble dispersion phase evolution module through a main chamber injection pipe 19 and a confluence valve 15; a main observation chamber interaction area 37 is arranged in the main observation chamber 14, one side of the main observation chamber interaction area 37 is communicated with the main chamber injection pipe 19 through a visible injection channel 36, and the other side is communicated with the main chamber outflow pipe 20; a visible reverse outflow channel 39 is arranged in the main observation chamber 14 and is arranged at one side of the visible injection channel 36, and the visible reverse outflow channel 39 is communicated with the main chamber reverse outflow pipe 21; the width of the visible injection channel 36 and the visible reverse outflow channel 39 is 100 μm, and the length is 5 cm; the main observation chamber interaction region 37 is in a pore throat-crack network shape, the pore throat width is 1-300 μm, and the crack width is 1-1000 μm; the side length of the interaction area 37 of the main observation chamber is 3 cm-10 cm; main cell interaction region 37 for simulated observation of CO2The water-based three-phase foam has a synergistic plugging regulating effect.
In the testing device, the solid dispersion phase evolution chamber 29, the bubble dispersion phase evolution chamber 11 and the main observation chamber 14 are formed by bonding an etching sheet and a smooth cover sheet. The top window 3 and the bottom window 5 are made of temperature-resistant and pressure-resistant glass materials.
Use of CO of the invention2When the device for testing the phase evolution and the synergic plugging regulating effect in the water-based three-phase foam is used, the method can be carried out according to the following steps:
(1) device connection
Fixedly mounting a main observation chamber 14, a solid dispersion phase evolution chamber 29 and a bubble dispersion phase evolution chamber 11 with a bottom clamping shell 2, connecting inner pipelines of the device through pressure-resistant joints, and assembling all parts contained in the testing device;
(2) pressure test
Connecting all pipe orifices of the testing device to a high-pressure pipeline provided with a valve, opening a confining pressure liquid inlet and outlet pipe 8 and a solid phase injection pipe high-pressure pipeline valve, connecting the other confining pressure liquid inlet and outlet pipe and a main chamber outlet pipe 20 with a pressure gauge, closing other valves, introducing high-pressure liquid into a solid phase injection pipe 16 to set pressure, introducing confining pressure liquid into the confining pressure liquid inlet and outlet pipe 8 to set pressure, carrying out pressure-building treatment, determining the set pressure as required, maintaining the working pressure for 30-40 minutes, and ensuring that the qualified standard is not punctured or leaked.
(3) Generating a bubble dispersion
CO is respectively introduced into a gas injection port 32 and a liquid injection port 31 of a bubble generator 302And foaming liquid, other gas injection ports and liquid injection ports are closed during injection; after the generated bubbles flow into the bubble dispersion phase evolution area 35, the evolution process of the bubbles is observed.
(4) Introduction of solid dispersion
Respectively injecting solid dispersion phase base liquid into a solid phase injection port 25 of a solid dispersion phase evolution area, and closing other solid phase injection ports during injection; the shear evolution of the solid dispersed phase particles within the solid dispersed phase evolution zone 26 is observed.
(5) Simulating a three-phase in-foam coordinated conditioning interaction process
For CO2The water-based three-phase foam profile control process comprises the following steps: closing the main chamber reverse outflow pipe valve, and opening the main chamber injection pipe 19 and the main chamber outflow pipe valve; CO 22The air bubbles and the solid dispersion phase particles enter the visible injection channel 36 through the confluence valve 15 and the main chamber injection pipe, and the interaction of single air bubbles and single solid dispersion phase particles can be observed; CO 22The gas bubbles and solid dispersed phase particles pass through the visual injection channel 36 and enter the interaction region 37 of the main observation chamber to observe the solid dispersed phase particles and CO2Interaction of bubbles in pore throats, cracks; CO 22Discharging bubbles and solid dispersed phase particles through the main chamber outflow pipe;
for CO2The water-based three-phase foam water plugging process comprises the following steps: closing the main chamber injection pipe valve, opening the main chamber reverse outflow pipe 21 valve, and reversely displacing CO from the main chamber outflow pipe2Water-based three-phase foam, simulated CO2And (3) performing reverse drainage and mining after water plugging of the water-based three-phase foam. Through the visual reverse flow channel 39, the interaction of individual bubbles and individual particles of the solid dispersed phase can be observed.
(6) Pressure relief cleaning
Introducing CO2The testing device for the phase evolution and the coordinated plugging regulation in the water-based three-phase foam removes pressure, discharges residual gas and liquid, sequentially injects clear water and nitrogen to clean the main observation chamber, the solid dispersion phase evolution chamber and the bubble dispersion phase evolution chamber, and stores the substances after disassembly.
Claims (10)
1. CO (carbon monoxide)2The device for testing the phase evolution and coordinated plugging regulation effect in the water-based three-phase foam comprises a solid dispersion phase evolution module, a bubble dispersion phase evolution module and an internal phase coordinated plugging regulation visualization module which are all arranged in a cavity formed by a top clamping shell and a bottom clamping shell and are fixed on the bottom clamping shell;
the top layer clamping shell and the bottom layer clamping shell are both provided with surrounding pressure liquid inlet and outlet pipes;
top windows are arranged on the top clamping shell at corresponding positions of the solid dispersed phase evolution module, the bubble dispersed phase evolution module and the inner-phase coordinated plugging visualization module;
bottom windows are arranged on the bottom clamping shell at corresponding positions of the solid dispersed phase evolution module, the bubble dispersed phase evolution module and the inner-phase coordinated plugging visualization module;
the solid dispersion phase evolution module comprises a solid dispersion phase evolution chamber, a plurality of solid dispersion phase evolution areas are arranged in the solid dispersion phase evolution chamber, and two ends of each solid dispersion phase evolution area are respectively connected with a solid phase injection pipe and a solid phase outflow pipe;
the bubble dispersed phase evolution module comprises a bubble dispersed phase evolution chamber, a plurality of bubble dispersed phase evolution areas are arranged in the bubble dispersed phase evolution chamber, and two ends of the bubble dispersed phase evolution chamber are respectively connected with a bubble generating body and a bubble outflow pipe;
the inner cooperative blockage-adjusting visualization module comprises a main observation chamber, wherein a main observation chamber interaction area is arranged in the main observation chamber, one end of the main observation chamber interaction area is communicated with a main chamber injection pipe through a visible injection channel, and the other end of the main observation chamber interaction area is communicated with a main chamber outflow pipe;
a visible reverse outflow channel is arranged on one side of the visible injection channel and communicated with a reverse outflow pipe of the main chamber;
the main observation chamber is respectively communicated with the solid dispersion phase evolution module and the bubble dispersion phase evolution module through the main chamber injection pipe and the confluence valve.
2. CO according to claim 12Phase evolution and harmonious stifled effect testing arrangement in water base three-phase foam, its characterized in that: the solid dispersion phase evolution chamber, the bubble dispersion phase evolution chamber and the main observation chamber are all fixed on the bottom clamping shell through clamping plates.
3. CO according to claim 1 or 22Phase evolution and harmonious stifled effect testing arrangement in water base three-phase foam, its characterized in that: a plurality of shearing cylinders with different sizes are arranged in the solid dispersion phase evolution area;
the shearing cylinders are arranged in rows perpendicular to the flow direction of the solid dispersion phase, the distance between the shearing cylinders in each row is 0.5-100 mu m, and the shearing cylinders in two adjacent rows are arranged in a staggered mode.
4. CO according to any of claims 1-32Phase evolution and harmonious stifled effect testing arrangement in water base three-phase foam, its characterized in that: a plurality of bubble generators are arranged in the bubble dispersion phase evolution chamber;
the bubble generating body comprises an air flow channel and a liquid flow channel, one end of the air flow channel is an air injection port, the other end of the air flow channel is communicated with the liquid flow channel to form an h shape, one end of the liquid flow channel is an injection port, and the other end of the liquid flow channel is communicated with the bubble dispersion phase evolution area.
5. CO according to claim 42Phase evolution and harmonious stifled effect testing arrangement in water base three-phase foam, its characterized in that: the width of the airflow channel is 1 mu m to500 μm, and the width of the liquid flow channel is 10 μm to 800 μm.
6. CO according to any of claims 1-52Phase evolution and harmonious stifled effect testing arrangement in water base three-phase foam, its characterized in that: the width of the visible injection channel is 10-1000 μm, and the length is 1-10 cm;
the width of the visual reverse outflow channel is 10-1000 μm, and the length is 1-10 cm.
7. CO according to any one of claims 1-62Phase evolution and harmonious stifled effect testing arrangement in water base three-phase foam, its characterized in that: the interaction area of the main observation chamber is in a pore throat-crack network shape, wherein the width of the pore throat is 1-300 mu m, and the width of the crack is 1-500 mu m;
the side length of the interaction area of the main observation chamber is 3 cm-10 cm.
8. CO according to any of claims 1-72Phase evolution and harmonious stifled effect testing arrangement in water base three-phase foam, its characterized in that: the solid dispersed phase evolution chamber, the bubble dispersed phase evolution chamber and the main observation chamber are formed by bonding an etching sheet and a cover sheet;
the top window and the bottom window are made of temperature-resistant and pressure-resistant glass.
9. Simulated CO2A method for coordinating and regulating the interaction in water-based three-phase foam comprises the following steps:
s1, CO of any one of claims 1 to 82The pipe orifice of the water-based three-phase foam internal phase evolution and synergetic plugging regulation testing device is connected to a high-pressure pipeline provided with a valve, one confining pressure liquid inlet and outlet pipe and one solid phase injection pipe high-pressure pipeline valve are opened, the other confining pressure liquid inlet and outlet pipe and the main chamber outlet pipe are connected with a pressure gauge, other valves are closed, high-pressure liquid is introduced into the solid phase injection pipe to reach a set pressure, and the confining pressure is applied to the confining pressureAnd (3) introducing confining pressure liquid into the liquid inlet and outlet pipe to a set pressure, carrying out pressure building treatment, wherein the set pressure can be determined according to needs, the working pressure is maintained for 30-40 minutes, and the qualified standard is no puncture and no leakage.
S2, selecting the bubble generating body with the corresponding size according to the requirement of the actual research purpose, and introducing CO into the gas injection port and the liquid injection port respectively2And foaming liquid, other gas injection ports and liquid injection ports are closed during injection; observing the evolution process of the bubbles after the generated bubbles flow into the bubble dispersion phase evolution area;
s3, selecting the corresponding solid dispersion phase evolution areas according to the requirements of actual research purposes, respectively injecting solid dispersion phase base liquid into the corresponding solid phase injection ports, and closing other solid phase injection ports during injection; observing the shear evolution process of the solid dispersed phase particles in the solid dispersed phase evolution area;
s4, simulating a three-phase foam internal phase coordinated blockage interaction process
For CO2Water-based three-phase foam profile control process: closing the valve of the main chamber reverse outflow pipe, and opening the valves of the main chamber injection pipe and the main chamber outflow pipe; CO 22Bubbles and solid dispersion phase particles enter the visual injection channel through the confluence valve and the main chamber injection pipe, and the interaction of single bubbles and single solid dispersion phase particles can be observed; CO 22The bubbles and the solid dispersion phase particles enter the interaction area of the main observation chamber after passing through the visual injection channel, and the solid dispersion phase particles and CO are observed2The synergistic plugging phenomenon of bubbles in pore throats and cracks is realized; CO 22Discharging bubbles and solid dispersed phase particles through the main chamber outflow pipe;
for CO2The water-based three-phase foam water plugging process comprises the following steps: closing the valve of the main chamber injection pipe, opening the valve of the main chamber reverse outflow pipe, and reversely displacing CO from the main chamber outflow pipe2Water-based three-phase foam, simulated CO2And in the process of reverse drainage and production after water plugging of the water-based three-phase foam, the interaction of single air bubbles and single solid dispersion phase particles can be observed through the visual reverse outflow channel.
10. Use of a test device according to any one of claims 1 to 8 in the investigation of CO2The evolution process of the bubble dispersion phase and the solid dispersion phase, the research on the evolution rule of the three-phase foam internal phase and the application of simulating the synergic plugging regulation effect of the internal phase in the reservoir.
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