CN109723415B - Visual simulation experiment device and method for vibration foam flooding foaming characteristics of transparent sand filling pipe - Google Patents
Visual simulation experiment device and method for vibration foam flooding foaming characteristics of transparent sand filling pipe Download PDFInfo
- Publication number
- CN109723415B CN109723415B CN201811616287.5A CN201811616287A CN109723415B CN 109723415 B CN109723415 B CN 109723415B CN 201811616287 A CN201811616287 A CN 201811616287A CN 109723415 B CN109723415 B CN 109723415B
- Authority
- CN
- China
- Prior art keywords
- foam
- pipe
- transparent
- sand
- gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The invention discloses a visual simulation experiment device and a visual simulation experiment method for vibration foam driving foaming characteristics of a transparent sand filling pipe. The invention has reasonable design, complete functions, simple and convenient use and operation and good simulation effect, can realize self sealing, avoids fluid channeling formed on the wall surface of the transparent pipe body, and obtains the foaming and defoaming rules of the foam flooding under different vibration parameters, the sand production condition and the crude oil recovery ratio through visual test.
Description
Technical Field
The invention relates to the technical field of foam flooding oil extraction experiments in oil and natural gas engineering, in particular to an experimental device and method for visual simulation of vibration foam flooding foaming characteristics of a transparent sand filling pipe.
Background
The foam flooding technology is an important oil recovery technology for improving the crude oil recovery ratio in the field of petroleum and natural gas engineering, and theoretical guidance can be provided for effect improvement and engineering design through experimental mechanism revelation. With the proposal of the artificial resonance wave enhanced oil recovery and foam flooding composite technology concept, the foaming volume and half-life period under the vibration condition are both obviously increased, however, the foam flooding research under the vibration condition is still limited to the analysis of resistance coefficient and residual resistance coefficient at present, and the foam characteristics of the vibration foam flooding process are not represented quantitatively. An indoor foam flooding simulation experiment device and an effective experiment method thereof are needed, which can further analyze long-distance displacement and visualization under a vibration condition, and deeply disclose foaming and foam stabilizing mechanisms of vibration foam flooding.
On one hand, although a vibration foam displacement (pressure and recovery) experimental device exists, the experiment is carried out by using a core holder and a sand filling pipe which are made of metal and internally provided with a rubber sleeve in consideration of the requirement of confining pressure, the change of foam (such as foam form, size and the like) in the vibration process cannot be analyzed, and the visualization cannot be realized. The experimental device can realize visual measurement of foaming characteristics in the vibration foam flooding process, and measurement indexes are different from the experimental method.
On the other hand, the foam flooding foaming characteristic visualization device is various in types (including six types, namely a static foaming simulation device, a visual etching model, a visual double-plate crack model, a high-pressure physical property analyzer foaming simulation device, a metal core holder/sand filling pipe + sound wave/CT/radioactive scanning and a windowing visual sand filling pipe), but the device for performing foam characteristic visualization by using a transparent sand filling pipe is not available, and the device for performing vibration foam flooding by using the transparent sand filling pipe is also not available. The static (stirring or oscillating) foaming simulator is not filled with core sand, and the fluid change in the displacement process cannot be researched. The scale of the visual etching model and the visual high-pressure physical property analyzer is usually smaller, the foam flooding foaming characteristic with longer displacement distance is difficult to simulate, and the visual etching model etches pores for manual rules, has high cost and large pore etching difficulty under the conditions of ultra-low permeability and compactness, and cannot represent the pores randomly distributed in an actual rock core. The visual double-plate crack model is formed by bonding two transparent plates, thin core sand can be filled between the two transparent plates, but the model is only suitable for high permeability and crack flow, cannot realize low permeability measurement, and when different displacement distance measurements need to be carried out, a new transparent plate needs to be manufactured again, so that the repeatability of the device is poor. The conventional metal core holder/sand filling pipe cannot be directly visualized, the experiment cost of the metal core holder/sand filling pipe and the acoustic wave/CT/radioactive scanning is high, the repeatability is poor, and the fluid distribution result accuracy obtained by the acoustic wave scanning or the CT scanning is influenced by the higher air resistance anti-fluid. The windowing visual sand filling pipe only observes the foam form at the windowing position by utilizing the conventional metal sand filling pipe and visual windowing design, and the basic composition of internal parts is not substantially changed by the integral device. The experiment device adopts the transparent sand filling pipe and the flat glass pipe at the extraction end for visualization, the device type is different from the six types, and the experiment method can realize direct visual analysis of reservoir foam flooding and vibration foam flooding with different displacement distances and different permeabilities by adjusting the length and the permeability of the artificial rock core by using the same experiment device.
Thirdly, although a simple visual displacement device which utilizes a transparent intermediate container as a simulated sand filling pipe or a core holder exists, the problem of obvious wall surface channeling existing between an artificial core and the wall surface of a pipe body is not solved, the accuracy of an experimental result is seriously influenced, the device is particularly not suitable for gas injection conditions and limited in applicability, and the device is not used for foam flooding and vibration foam flooding foaming characteristic research. The experimental device has the effects that the experimental device can be used for conventional visual displacement, can also realize the foam driving and foaming characteristic analysis of vibration foam, and comprehensively eliminates wall surface channeling through multiple modes such as cemented sand blocking, core sand filling, magnetic rotor stirring and the like; in addition, the experimental device can also carry out sand production visualization and sand control effect analysis which are not considered by other devices.
In conclusion, an experimental device for realizing vibration foam flooding by using a transparent sand-filling pipe is not available at present, and particularly, a multifunctional vibration foam flooding visual indoor simulation experimental device which is reasonable in design (capable of avoiding wall surface cross flow), low in cost, capable of achieving long-distance displacement and high in reusability and an effective experimental method thereof are not available.
Disclosure of Invention
The invention aims to solve the technical problem of providing a visual simulation experiment device and method for the vibration foam flooding foaming characteristics of a transparent sand-packed pipe, which have the advantages of reliable working performance, good simulation effect, reasonable installation and layout and low cost, aiming at the defects of the existing experiment device and technology.
In order to realize the purpose, the invention is realized according to the following technical scheme:
the utility model provides a visual simulation experiment device of foaming characteristic is driven to transparent sand-packed pipe vibration foam, its characterized in that: comprises an artificial resonance wave test bed (1), a transparent sand filling pipe (2), a flat glass pipe (3), a three-phase separation device (4), a metering device (5), a camera device (6), an electromagnetic stirring device (7), a six-way valve (8), a foaming device (9), an intermediate transition gas transmission container (10), an intermediate transition foam liquid transmission container (11), an intermediate transition water transmission container (12), an intermediate transition oil transmission container (13), a displacement pump (14), a water storage tank (15), an air source device (16) and a data processing device (25), wherein the transparent sand filling pipe (2) is fixed on the artificial resonance wave test bed (1), the flat glass pipe (3) is arranged at the extraction end of the transparent sand filling pipe (2), the camera device (6) is respectively arranged right above the flat glass pipe (3) and the transparent sand filling pipe (2), the electromagnetic stirring device (7) is arranged right below the injection end of the transparent sand filling pipe (2), the six-way valve (8) is connected with the injection end of the transparent sand filling pipe (2) through a liquid conveying pipeline, the foaming device (9) mixes foam liquid and gas, the intermediate transition gas transmission container (10) is connected with the six-way valve (8) through a gas transmission pipeline, the middle transitional foam liquid conveying container (11) is connected with the six-way valve (8) through a liquid conveying pipeline, the middle transitional water delivery container (12) is connected with the six-way valve (8) through a water delivery pipeline, the intermediate transition oil transportation container (13) is connected with the six-way valve (8) through an oil transportation pipeline, the displacement pump (14) is connected with the intermediate transition foam liquid transmission container (11) and the intermediate transition gas transmission container (10), the gas source device (16) is connected with the intermediate transition gas transmission container (10); the artificial resonance wave test bed (1) is controlled by a data processing device (25) to be opened and closed and adjust vibration parameters.
Among the above-mentioned technical scheme, transparent sand-packed pipe (2) are including detachable threaded end cover (17), transparent body (18), magnetic rotor (19), bracing piece (20), screen cloth cover (21), cemented sand stifled (22), artificial rock core (23), the reducing pipe (24) of sand-packed preparation, wherein, magnetic rotor (19) are laid at the inside injection end of transparent body (18), screen cloth cover (21) with bracing piece (20) adopt threaded connection, cemented sand stifled (22) with screen cloth cover (21) are connected, reducing pipe (24) with artificial rock core (23) extraction end is connected, the length of bracing piece (20) is greater than the length of magnetic rotor (19).
In the technical scheme, the metering device (5) is marked with scales for measuring the volume of the fluid stored in the metering device, and the transparent tube body (18) is marked with scales for measuring the height of the artificial rock core and the fluid.
In the technical scheme, a pipeline connected with the air source device (16) and the six-way valve (8) is provided with a pressure measuring device (26) for detecting the fluid flowing through the pipeline in real time.
In the technical scheme, another screen sleeve with the same specification is arranged between the artificial rock core (23) and the reducing pipe (24), and the directions of the two screen sleeves are opposite.
In the technical scheme, the inner ring of the screen sleeve (21) is a sand control net with a certain mesh number, the outer ring of the screen sleeve made of metal is provided with a core claw for fixing the cemented sand plug (22), the other side of the outer ring of the screen sleeve is drilled with threaded holes, the number of the threaded holes is the same as that of the support rods (20), and the outer diameter of the screen sleeve is the same as the inner diameter of the transparent pipe body (18).
In the technical scheme, the reducing pipe (24) is funnel-shaped, the manufacturing material is glass or resin, the maximum outer diameter of the funnel-shaped reducing pipe is the same as the inner diameter of the transparent pipe body (18), the tail of the reducing pipe (24) penetrates through the threaded end cover (17) of the extraction end of the transparent sand filling pipe, sealing is achieved between the threaded end cover and the tail through resin or waterproof adhesive tape, and the tail of the reducing pipe is connected with the flat glass pipe (3) through the rubber pipe (27).
In the technical scheme, the flat glass tube (3) is a transparent glass tube which is flattened at the middle position, the internal section of the flattened position is rectangular or elliptical, and the height of the internal section is less than or equal to 2 mm.
The invention also provides a visual simulation experiment method for the vibration foam driving foaming characteristics of the transparent sand filling pipe, which is realized according to the visual simulation experiment device for the vibration foam driving foaming characteristics of the transparent sand filling pipe, and is characterized by comprising the following steps of:
step S1, a static foaming characteristic measurement experiment, which comprises the following steps:
s101, foam generation volume and half-life measurement: preparing foam liquid, placing the foam liquid in a stirring cup, stirring the foam liquid by using an electromagnetic stirring device (7) to form foam, measuring the volume of the formed foam, and recording the half-life period of the foam;
s102, foam size measurement: configuring and stirring the foam according to the step 101 to form the same foam, placing a small amount of foam in a flat glass tube (3), recording the position, which is just opposite to the flat glass tube, of a camera device (6), observing the size and the shape of the foam, adjusting the distance between the camera device and the flat glass tube and the focal distance of the camera device to ensure clear images, and transmitting the data to a data processing device (8);
s103, repeating the step S101, changing the rotating speed of the electromagnetic stirring device, measuring the foam forming volume and the foam half-life period at different rotating speeds, and observing the foam size and form change.
Step S2, simulating a foaming characteristic simulation experiment of the non-artificial resonant wave foam flooding, wherein the experiment process is as follows:
s201, preparing transparent sand filling pipes: a cemented sand plug (22) made by mixing resin and core sand is arranged on a screen sleeve (21), and a core claw on the screen sleeve clamps the cemented sand plug; the support rod (20) is ensured to be firmly connected with the screen sleeve; the magnetic rotor (19) and the screen sleeve are sequentially arranged in a transparent sand filling pipe; mixing resin with a certain volume with core sand according to the requirements of permeability and porosity of the artificial core, pouring the mixture into a transparent sand filling pipe for multiple times, slightly compacting, and simultaneously ensuring that a sand control net on a screen sleeve is not crushed; coating a layer of curable resin with sealing function on the tail part of the reducing pipe (24) and the threaded end cover, enabling the tail part of the reducing pipe to penetrate through the central hole of the threaded end cover (17), and then placing the reducing pipe into the transparent sand filling pipe; connecting and sealing the threaded end cover of the extraction end with a transparent pipe body (18) of the transparent sand filling pipe; standing for a period of time, and waiting for the cooling and solidification of the resin at the artificial rock core or the reducing pipe;
s202, connecting device, saturated simulated formation water and simulated oil: connecting the transparent sand-filled pipe (2) to a simulation experiment device, starting a displacement pump (14), displacing simulated formation water into the transparent sand-filled pipe, testing the sealing performance of the experiment device, continuing to displace after the sealing is complete, recording the pressure and the displacement volume to obtain the porosity of a rock core, and stopping when the pressure is kept stable at the injection end after the displacement; carrying out saturated simulation oil on the artificial rock core (23) in the transparent sand filling pipe; then, simulating water drive, forming certain initial water saturation in the artificial rock core, and stopping a pump;
s203, foam flooding foaming characteristic simulation: injecting a certain amount of foam liquid into the artificial rock core of the transparent sand filling pipe, recording the pressure change in the displacement process, and keeping the electromagnetic stirring device (7) closed all the time in the process; then, according to the requirement of the injected gas-liquid ratio, injecting a certain amount of gas into the artificial core of the transparent sand filling pipe; recording the pressure and the displacement volume change in the displacement process, measuring the size and the form of foam in the flat glass tube (3) at the extraction end and the fluid distribution change in the transparent sand filling tube by using a camera device (6), and respectively recording the gas volume and the volume change of the extracted oil in the three-phase separation device and the metering device (5) before and after the foam reaches the three-phase separation device (4);
s204, foam driving and defoaming feature simulation: replacing the artificial rock core (23), preparing transparent sand filling pipe filling according to the steps S201 to S202, saturating the simulated formation water and the saturated simulated oil, opening the electromagnetic stirring device (7) and keeping high rotating speed; adjusting a switch to enable the foam liquid and the gas to flow through a foaming device (9), setting different pump injection flow rates of a displacement pump (14) for driving the foam liquid and the gas according to the requirement of the gas-liquid ratio, and simultaneously injecting the foam liquid and the gas into a transparent sand filling pipe (2); recording the pressure, the displacement volume, the foam size and form, the fluid distribution in the transparent sand-filled pipe, the gas volume in the three-phase separation device (4) and the metering device (5) and the change of the volume of the produced oil in the displacement process;
s205, repeating the steps S201 to S204, changing the permeability, the porosity and the initial water saturation of the artificial rock core (23), the gas-liquid ratio of foam flooding, the displacement flow rate and the rotating speed of the electromagnetic stirring device (7), and measuring the pressure, the displacement volume, the foam size and form, the fluid distribution in the transparent sand filling pipe (2), the gas volume and the produced oil volume in the three-phase separation device (4) and the metering device (5) in the displacement process under different experimental conditions;
s3, replacing the rock core and simulating the foaming characteristic of the artificial resonance wave foam flooding at different vibration parameters, wherein the simulation process comprises the following steps:
s301, pre-running of an artificial resonance wave test bed: controlling the test bed (1) for starting the artificial resonance waves to start by using a data processing device (8), setting vibration frequency and vibration acceleration, setting the pre-running time to be 20-40 min, and then suspending the test bed for the artificial resonance waves to run;
s302, connecting device, saturated simulated formation water and simulated oil: repeating the step S201, changing the permeability and porosity of the artificial rock core (23), fixing the transparent sand filling pipe (2) prepared for filling on the artificial resonance wave test bed (1), and respectively connecting the transparent sand filling pipe with the series devices of the injection end and the extraction end; repeating the step S202 to simulate formation water and simulated oil for artificial core saturation;
s303, foam flooding foaming characteristic simulation under a vibration condition: injecting foam liquid with the same volume into an artificial rock core (23) of the transparent sand filling pipe (2), recording the pressure change in the displacement process, and keeping the electromagnetic stirring device (7) closed all the time in the process; after the foam liquid is injected, starting the artificial resonance wave test bed (1); then, injecting gas with the same volume into the artificial rock core of the transparent sand filling pipe under the conditions of the same gas-liquid ratio and displacement flow rate; the method comprises the following steps of (1) accompanying sand production in the vibrating foam flooding process of the loose artificial rock core, recording the sand production vacancy condition and the sand production amount of a production end, and recording the pressure, the displacement volume, the foam size and form, the fluid distribution in a transparent sand filling pipe, the gas volume in a three-phase separation device (4) and a metering device (5) and the change of the volume of produced oil in the vibrating foam flooding process;
s304, foam flooding defoaming characteristic simulation under the vibration condition: repeating the step S301 and the step S302, and carrying out filling preparation of the transparent sand filling pipe, saturated simulation of formation water and saturated simulation oil; opening the electromagnetic stirring device (7) and keeping high rotating speed, and starting the artificial resonance wave test bed (1); in a synchronous step S204, the switch is adjusted to enable the foam liquid and the gas to flow through the foaming device (9), and the foam liquid and the gas are simultaneously injected into the transparent sand filling pipe (2) under the conditions of similar foam liquid and gas pump injection flow rate; recording the pressure, the displacement volume, the foam size and the foam form, the fluid distribution in the transparent sand filling pipe, the sand output, the gas volume in the three-phase separation device (4) and the metering device (5) and the change of the volume of the produced oil in the vibration foam flooding process;
s305, repeating the steps S301 to S304, changing the vibration frequency, the vibration acceleration and the vibration running time, changing the permeability, the porosity and the initial water saturation of the artificial rock core (23), the gas-liquid ratio of foam flooding, the displacement flow and the rotating speed of the electromagnetic stirring device (7), and measuring the pressure, the displacement volume, the foam size and form, the fluid distribution in the transparent sand filling pipe (2), the sand output, the gas volume in the three-phase separation device (4) and the metering device (5) and the change of the produced oil volume in the displacement process under different experimental conditions;
step S4, data processing: calculating the gas volume of gas channeling according to the experimental data recorded in the steps S101 to S103, S203 to S205 and S303 to S305, comparing the results of the static foaming characteristic measurement experiment, the non-artificial resonant wave foam flooding foaming characteristic simulation experiment and the artificial resonant wave foam flooding foaming characteristic simulation experiment, analyzing the influence of the vibration on the foam forming and defoaming rules, and analyzing the changes of the foam size and form, the crude oil recovery ratio, the gas channeling time and the free gas volume under different vibration foam flooding experimental conditions.
In the technical scheme, the injection volume of the foam liquid is controlled not to exceed 0.3PV, and the pressure of the injection end of the transparent sand filling pipe in the displacement process is controlled not to exceed 1.0 MPa.
Compared with the prior art, the invention has the following advantages:
1. the input cost is low, the device has simple structure and reasonable design, is convenient to install and arrange, and is simple to use and operate.
2. The device and the method are high in practical value and wide in popularization and application prospect, particularly, the foam flooding foaming characteristic simulation experiment of the transparent sand filling pipe is carried out under the condition of loading artificial resonance waves with different vibration frequencies, amplitudes and vibration times, the free gas volume (namely the gas volume generating gas channeling) in the foam flooding process and the foam generation size and form rule changes can be observed and recorded at multiple angles, and can be used for guiding foam flooding, vibration foam flooding simulation calculation and engineering design scheme optimization, so that the foam flooding effect in the oil and gas reservoir development process is improved, the crude oil recovery rate is improved, and the physical-chemical compound oil extraction technical mechanism explanation is deepened.
3. Through injection end magnetic rotor stirring, can generate stable foam rapidly at the injection end, can realize transparent sand pack pipe foam and drive defoaming characteristic simulation, provide high accuracy, high stability's indoor simulation experiment condition, can use it to guide the foam to drive the establishment of defoaming law auxiliary equation in the mathematical model to and foam drive, vibration foam drive the analog computation, guide oil and gas reservoir development process foam to drive gas degree of scurring and differentiate, and then develop the auxiliary measure design.
4. Different displacement distances are simulated by changing the sand filling amount, the physical property of the artificial core and the volume of saturated simulation oil are changed, and foam driving, foaming and defoaming rule simulation of the transparent sand filling pipe under different displacement distances, physical properties of a reservoir and development time can be realized.
5. The method has the advantages that the proper screen sleeve is added and selected at the injection end of the transparent pipe body of the transparent sand filling pipe according to the sand prevention requirement, the sand expelling problem of the vibration foam and the simulation of the sand prevention effect are realized, the construction system of the artificial resonance wave composite foam flooding technology is further perfected, and the damage of the vibration foam flooding to the near well zone of the unconsolidated sandstone reservoir is reduced.
6. The working performance is stable, and because the magnetic rotor stirring, (single or double) cemented sand blocking prevention and artificial rock core sand filling manufacturing are adopted in the transparent sand filling pipe, the gas channeling of gas along the pipe wall surface is fully reduced in the foam flooding process, and the problem of the gas channeling of the pipe wall surface in other visual displacement simulation processes is solved.
7. The application range is wide, and the experiment simulates the formation temperature: and (2) simulating displacement pressure at 25-80 ℃: 0-1 MPa, simulating artificial resonance wave frequency: 12-500 Hz, the displacement medium can be various displacement media such as different simulated water, simulated oil, foam liquid, gas and the like, the artificial rock core can be suitable for low-permeability and ultra-low-permeability vibration foam flooding analysis by adjusting the resin content in the artificial rock core, and meanwhile, the experimental simulation is not only suitable for the selective foam flooding technical analysis, but also suitable for the foam profile control technical analysis.
In conclusion, the invention has reasonable design, simple operation, good simulation effect, wide application range and low cost, utilizes the artificial resonance fluctuation worktable and the transparent sand-filled pipe to carry out foam driving foaming characteristic simulation, measures the pressure, the foam size and the foam shape in the displacement process, the fluid distribution in the transparent sand-filled pipe, the gas volume in the three-phase separation device and the metering device and the change of the volume of the produced oil under different experimental conditions, through data processing, the foam flooding foaming, defoaming and crude oil recovery ratio under different vibration parameters (frequency, amplitude and vibration time), reservoir physical properties (artificial core porosity and permeability), development states (sand production opportunity and water saturation), core length and displacement parameters (gas-liquid ratio, injection speed and injection amount) are obtained through analysis, so that the multi-angle visual observation function in the long-distance displacement process is realized, and the potential pipe wall surface gas channeling problem in the displacement simulation process can be effectively solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a reference diagram of the overall use state of the visual simulation experiment device for the vibration foam flooding foaming characteristics of the transparent sand-packed pipe;
FIG. 2 is a detailed use state reference diagram of a transparent sand-filled pipe and a flat glass connecting pipe in the visual simulation experiment device for the vibration foam flooding foaming characteristics of the transparent sand-filled pipe;
FIG. 3 is a flow chart of an experimental method for performing visual simulation of vibration foam flooding foaming characteristics of the transparent sand-packed pipe.
Description of reference numerals: 1-artificial resonance wave test bed; 2-transparent sand filling pipe; 3-flat glass tube; 4-a three-phase separation device; 5-a metering device; 6-a camera device; 7-an electromagnetic stirring device; 8-a six-way valve; 9-a foaming device; 10-intermediate transition gas transmission container; 11-intermediate transition foam liquid conveying container; 12-intermediate transition water delivery vessel; 13-intermediate transition oil transportation container; 14-a displacement pump; 15-a water storage tank; 16-a gas source device; 17-a threaded end cap; 18-a transparent tube; 19-a magnetic rotor; 20-a support bar; 21-screen mesh sleeve; 22-cemented sand blocking; 23-artificial core; 24-reducing the diameter; 25-a data processing device; 26-a pressure measuring device; 27-rubber tube.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention.
In the description of the present invention, it is to be understood that the terms "radial," "axial," "upper," "lower," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and thus are not to be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The visual simulation experiment device for the vibration foam-driving foaming characteristics of the transparent sand-filled pipe comprises an artificial resonance wave test bed 1, a transparent sand-filled pipe 2 fixed on the artificial resonance wave test bed, a flat glass pipe 3 arranged at the extraction end of the transparent sand-filled pipe, a three-phase separation device 4, a metering device 5, a camera 6 respectively arranged right above the flat glass pipe and the sand-filled pipe, an electromagnetic stirring device 7 arranged right below the injection end of the sand-filled pipe, a six-way valve 8 connected with the injection end of the transparent sand-filled pipe through a liquid conveying pipeline, a foaming device 9 for mixing foam liquid and gas, an intermediate transition gas conveying container 10 connected with the six-way valve through a gas conveying pipeline, an intermediate transition foam liquid conveying container 11 connected with the six-way valve through a liquid conveying pipeline, an intermediate transition water conveying container 12 connected with the six-way valve through a water conveying pipeline, an intermediate transition oil conveying container 13 connected with the six-way valve through a liquid conveying pipeline, a liquid-, A displacement pump 14, a water storage tank 15, an air source device 16 and a data processing device 25, wherein the displacement pump 14 and the water storage tank are connected with the intermediate transition foam liquid conveying container and the intermediate transition gas conveying container; the transparent sand filling pipe 2 comprises a detachable threaded end cover 17, a transparent pipe body 18, a magnetic rotor 19 arranged at an injection end in the transparent pipe body, a support rod 20, a screen sleeve 21 connected with the support rod, a cemented sand plug 22 connected with the screen sleeve, an artificial rock core 23 made of sand filling, and a reducing pipe 24 connected with an artificial rock core extraction end; the support rod 20 is in threaded connection with the screen sleeve 21, the support rod is not connected with the threaded end cover 17, and the length of the support rod is greater than that of the magnetic rotor 19; the transparent sand-filling pipe 2 can be provided with another screen sleeve between the artificial core 23 made of sand filling and the reducing pipe 24 according to the displacement sand prevention requirement, and the directions of the two screen sleeves are opposite; the metering device 5 is marked with scales for measuring the volume of fluid stored in the metering device, and the transparent tube body 18 is marked with scales for measuring the artificial rock core and the height of the fluid; a pressure measuring device 26 for detecting the fluid flowing through the pressure measuring device in real time is arranged on a pipeline connecting the air source device and the six-way valve 8; the artificial resonance wave test bed 1 can be controlled by the data processing device 8 to be opened and closed and adjust vibration parameters.
In this embodiment, the inner circle of the screen cloth cover 21 is a sand control net with 80-100 meshes, the outer circle of the aluminum screen cloth cover is provided with a core claw, the cemented sand plug 22 can be fixed, the transparent pipe body is cylindrical, the other side of the outer circle of the screen cloth cover is drilled with 3 threaded holes and uniformly distributed, the diameter of an inscribed circle formed by the threaded holes is larger than 2cm, the number of the threaded holes is the same as that of the support rods 20, and the outer diameter of the screen cloth cover is the same as the inner diameter of the transparent pipe body 18 and is 25 mm.
In this embodiment, the reducing pipe 24 is funnel-shaped and made of resin, the maximum outer diameter of the reducing pipe is the same as the inner diameter of the transparent pipe body 18 and is 25mm, the tail of the reducing pipe can pass through the threaded end cover 17 of the extraction end of the transparent sand-packed pipe, the threaded end cover and the tail of the reducing pipe are sealed by epoxy resin, and the tail of the reducing pipe is connected with the flat glass pipe 3 through the rubber pipe 27.
In this embodiment, the flat glass tube 3 is a transparent glass tube which is flattened at the middle position, the inner cross section of the flattened position is approximately rectangular, and the height of the inner cross section is not more than 2 mm.
The visual simulation experiment method for the vibration foam flooding foaming characteristics of the transparent sand-packed pipe shown in fig. 3 comprises the following steps:
step S1, a static foaming characteristic measurement experiment, which comprises the following steps:
s101, foam generation volume and half-life measurement: preparing foam liquid with certain volume and concentration, placing the foam liquid in a stirring cup, stirring the foam liquid by using an electromagnetic stirring device 7 at a certain rotating speed to form foam, measuring the foam forming volume, and recording the half-life period of the foam.
In the embodiment, the electromagnetic stirring device is an FK-H3 type magnetic stirrer with adjustable temperature (room temperature-300 ℃) and rotation speed (2-2400 rpm), the foam liquid is polyacrylamide + AES, and the stirring rotation speed is 2000 rpm.
S102, foam size measurement: configuring and stirring the foam according to the step 101 to form the same foam, taking a small amount of foam to place in the flat glass tube 3, recording the position of the camera device 6, which is just opposite to the flat glass tube, at the flattening position, observing the size and the shape of the foam, adjusting the distance between the camera device and the flat glass tube and the focal length of the camera device to ensure that the shot image is clear, and transmitting the data to the data processing device 8.
In the embodiment, stable foam generated by stirring is rapidly placed in a flat glass tube, a camera device is a 500-ten-thousand-pixel microscope electronic eyepiece for USB transmission and photographing and shooting, and data can be transmitted to a data processing device, namely a computer; the adjustment of the distance between the eyepiece head and the flat glass tube is realized through the fine-adjustable bracket in the experiment.
S103, repeating the step S101, changing the rotating speed of the electromagnetic stirring device, measuring the foam forming volume and the foam half-life period at different rotating speeds, and observing the foam size and form change.
Step S2, simulating a foaming characteristic simulation experiment of the non-artificial resonant wave foam flooding, wherein the experiment process is as follows:
s201, preparing transparent sand filling pipes: a cemented sand plug 22 made by mixing resin and core sand is arranged on a screen sleeve 21, and a core claw on the screen sleeve clamps the cemented sand plug; the support rod 20 is ensured to be firmly connected with the screen sleeve; the magnetic rotor 19 and the screen sleeve are sequentially arranged in a transparent sand filling pipe; mixing resin with a certain volume with core sand according to the requirements of permeability and porosity of the artificial core, pouring the mixture into a transparent sand filling pipe for multiple times, slightly compacting, and simultaneously ensuring that a sand control net on a screen sleeve is not crushed; coating a layer of curable and sealing resin on the tail part of the reducing pipe 24 and the threaded end cover, enabling the tail part of the reducing pipe to penetrate through the central hole of the threaded end cover 17, and then placing the reducing pipe into the transparent sand filling pipe; connecting and sealing the threaded end cover of the extraction end with the transparent pipe body 18 of the transparent sand filling pipe; standing for a period of time, and waiting for the resin at the artificial core or the reducing pipe to be cooled and solidified.
In this embodiment, the transparent tube 18 is a toughened glass with an inner diameter of 25mm and a length of 400mmA glass tube; the cemented sand plug is prepared by mixing 100-mesh quartz sand and epoxy resin, and the length of the cemented sand plug is less than 1 cm; the size of the magnetic rotor is only 5mm multiplied by 10mm, so that the rotor can be ensured to rotate smoothly in the transparent tube body; the permeability of the artificial core is 1000 multiplied by 10-3μm2The left part and the right part are made by slightly compacting quartz sand filled with sand, and the length is about 350 mm; a second screen sleeve is arranged between the artificial rock core and the reducing pipe; and the threaded end cover is connected with the transparent pipe body of the transparent sand filling pipe and then stands still for 20 min.
S202, connecting device, saturated simulated formation water and simulated oil: connecting the transparent sand-filled pipe 2 into a simulation experiment device, starting a displacement pump 14, displacing simulated formation water into the transparent sand-filled pipe, testing the sealing performance of the experiment device, continuing to displace after ensuring the sealing is complete, recording the pressure and the displacement volume to obtain the porosity of a rock core, and stopping when the pressure is kept stable at the injection end after displacement; carrying out saturated simulation oil on the artificial rock core 23 in the transparent sand-filled pipe; and then, performing simulated water drive, forming certain initial water saturation in the artificial rock core, and stopping the pump.
In the embodiment, the middle transition gas conveying container 10, the middle transition foam liquid conveying container 11, the middle transition water conveying container 12 and the middle transition oil conveying container 13 are respectively provided with one metering cylinder and 3 metering devices, the pressure measuring devices 26 are 1 pressure sensors and 1 pressure gauge, the simulated formation water refers to 6 oil layer formation water in the Ordos basin, and the simulated oil is kerosene; when the tightness of the simulated formation water displacement test experimental device is developed, the test device is ensured not to be overflowed and leaked, the pressure can be maintained to be stable for a long time, and the pump injection is carried out at a constant flow rate of 0.3 ml/min; the artificial core was saturated to an initial water saturation of approximately 70% after simulated water flooding.
S203, foam flooding foaming characteristic simulation: injecting a certain amount of foam liquid into the artificial rock core of the transparent sand filling pipe, recording the pressure change in the displacement process, and keeping the electromagnetic stirring device 7 closed all the time in the process; then, according to the requirement of the injected gas-liquid ratio, injecting a certain amount of gas into the artificial core of the transparent sand filling pipe; recording the pressure and the displacement volume change in the displacement process, measuring the size and the shape of foam in the flat glass tube 3 at the extraction end and the fluid distribution change in the transparent sand filling tube by using the camera device 6, and respectively recording the gas volume and the volume change of the extracted oil in the three-phase separation device and the metering device 5 before and after the foam reaches the three-phase separation device 4.
In this example, foam concentrate was injected into 0.1 pore volume, air source was air, gas was injected into 0.3 pore volume, gas-liquid ratio was 3: 1; the foam liquid is pumped and injected by a pump, and the gas is pumped and injected by the pump at a constant flow rate of 0.3 ml/min.
S204, foam driving and defoaming feature simulation: replacing the artificial rock core 23, filling and preparing a transparent sand filling pipe, saturating the simulated formation water and the saturated simulated oil according to the steps 201 to 202, opening the electromagnetic stirring device 7 and keeping high rotating speed; adjusting a switch to enable the foam liquid and the gas to flow through the foaming device 9, setting different pump injection flow rates of a displacement pump 14 for driving the foam liquid and the gas according to the requirement of the gas-liquid ratio, and simultaneously injecting the foam liquid and the gas into the transparent sand filling pipe 2; and recording the pressure, the displacement volume, the foam size and form, the fluid distribution in the transparent sand-filled pipe, the gas volume in the three-phase separation device 4 and the metering device 5 and the change of the volume of the produced oil in the displacement process.
In this embodiment, the permeability and length of the replaced artificial core are the same as those of the artificial core in step 201; the rotating speed of the electromagnetic stirring device is set to 2000 rpm; the foam liquid and the gas are pumped at constant flow rates of 0.1ml/min and 0.3ml/min respectively.
S205, repeating the steps S201 to S204, changing the permeability, the porosity and the initial water saturation of the artificial rock core 23, the gas-liquid ratio of foam flooding, the displacement flow rate and the rotating speed of the electromagnetic stirring device 7, and measuring the pressure, the displacement volume, the foam size and form, the fluid distribution in the transparent sand-packed pipe 2, the gas volume in the three-phase separation device 4 and the metering device 5 and the change of the produced oil volume in the displacement process under different experimental conditions.
Replacing the rock core and simulating the foaming characteristic of the artificial resonance wave foam flooding at different vibration parameters, wherein the experimental process is as follows:
s301, pre-running of an artificial resonance wave test bed: the data processing device 8 is used for controlling the artificial resonance wave test bed 1 to be started, certain vibration parameters (including vibration frequency and vibration acceleration) are set, the pre-running time is 20-40 min, and then the artificial resonance wave test bed is paused.
In the embodiment, the pre-running time of the artificial resonance wave test bed is 20min, the vibration frequency is set to be 20Hz, and the vibration acceleration is set to be 0.4m/s2。
S302, connecting device, saturated simulated formation water and simulated oil: repeating the step S201, changing the permeability and porosity of the artificial rock core 23, fixing the transparent sand filling pipe 2 prepared for filling on the artificial resonance wave test bed 1, and respectively connecting the transparent sand filling pipe with the serial devices of the injection end and the extraction end; and repeating the step S202 to simulate the formation water and the simulated oil for the artificial core saturation.
In the embodiment, the transparent sand filling pipe is fixed on the artificial resonance wave test bed body by adopting a method of combining a pin and a transparent adhesive tape, the injection end threaded end cover of the transparent sand filling pipe extends out of the bed body by more than 20mm, the electromagnetic stirring device is arranged under the rotor in the transparent sand filling pipe, the distance between the panel of the electromagnetic stirring device and the transparent sand filling pipe is not more than 2mm, and if the distance is too large, the electromagnetic stirring device is lifted up to ensure that the rotor can rotate smoothly in the stirring process.
S303, foam flooding foaming characteristic simulation under a vibration condition: injecting foam liquid with the same volume into the artificial rock core 23 of the transparent sand filling pipe 2, recording the pressure change in the displacement process, and keeping the electromagnetic stirring device 7 closed all the time in the process; after the foam liquid is injected, starting the artificial resonance wave test bed 1; then, injecting gas with the same volume into the artificial rock core of the transparent sand filling pipe under the conditions of the same gas-liquid ratio and displacement flow rate; and (3) accompanying sand production in the vibrating foam flooding process of the loose artificial rock core, recording the sand production vacancy condition and the sand production amount of the production end, and recording the pressure, the displacement volume, the foam size and form, the fluid distribution in the transparent sand filling pipe, the gas volume in the three-phase separation device 4 and the metering device 5 and the change of the volume of produced oil in the vibrating foam flooding process.
In this example, foam concentrate was injected into 0.1 pore volume, the gas source was still air, gas was injected into 0.3 pore volume, and constant flow rates were used for both the foam concentrate and gas injection with pumpsPumping at 0.3 ml/min; in the process of driving the vibration foam, the vibration frequency of the artificial resonance wave test bed is set to be 20Hz, and the vibration acceleration is set to be 0.4m/s2The vibration time is 200 min.
S304, foam flooding defoaming characteristic simulation under the vibration condition: repeating the step S301 and the step S302, and carrying out filling preparation of the transparent sand filling pipe, saturated simulation of formation water and saturated simulation oil; opening the electromagnetic stirring device 7 and keeping high rotating speed, and starting the artificial resonance wave test bed 1; in the same step 204, the switch is adjusted to enable the foam liquid and the gas to flow through the foaming device 9, and the foam liquid and the gas are simultaneously injected into the transparent sand filling pipe 2 under the condition of similar foam liquid and gas pump injection flow rate; and recording the pressure, the displacement volume, the foam size and form, the fluid distribution in the transparent sand filling pipe, the sand output, the gas volume in the three-phase separation device 4 and the metering device 5 and the change of the volume of the produced oil in the vibration foam flooding process.
In this embodiment, the rotation speed of the electromagnetic stirring device is 2000rpm, the vibration frequency of the artificial resonance wave test bed is set to 20Hz, and the vibration acceleration is set to 0.4m/s2The vibration time is 200 min.
S305, repeating the steps S301 to S304, changing the vibration frequency, the vibration acceleration and the vibration time, changing the permeability, the porosity and the initial water saturation of the artificial rock core 23, the gas-liquid ratio of foam flooding, the displacement flow rate and the rotating speed of the electromagnetic stirring device 7, and measuring the pressure, the displacement volume, the foam size and the foam shape, the fluid distribution in the transparent sand filling pipe 2, the sand output, the gas volume in the three-phase separation device 4 and the metering device 5 and the change of the produced oil volume under different experimental conditions.
Step S4, data processing: calculating the gas volume of gas channeling according to the experimental data recorded in the steps S101 to S103, S203 to S205 and S303 to S305, comparing the results of the static foaming characteristic measurement experiment, the non-artificial resonant wave foam flooding foaming characteristic simulation experiment and the artificial resonant wave foam flooding foaming characteristic simulation experiment, analyzing the influence of the vibration on the foam forming and defoaming rules, and analyzing the changes of the foam size and form, the crude oil recovery ratio, the gas channeling time and the free gas volume under different vibration foam flooding experimental conditions.
In the embodiment, in the visual simulation experiment process of the vibration foam driving foaming characteristics of the transparent sand-filling pipe, the injection volume of the foam liquid is not more than 0.3PV, and the pressure at the injection end of the transparent sand-filling pipe is controlled to be not more than 1.0MPa in the displacement process.
In conclusion, the static foaming characteristic measurement experiment is carried out by using an electromagnetic stirrer, the foam forming volume is measured, the foam half-life period is recorded, and the size and the form of the foam are observed; then, carrying out a non-artificial resonance wave foam flooding foaming characteristic simulation experiment by adopting a transparent sand filling pipe, and measuring the pressure, the displacement volume, the foam size and form, the fluid distribution in the transparent sand filling pipe, the gas volume in a three-phase separation device and a metering device and the change of the volume of produced oil in the displacement process under different experimental conditions; then, manufacturing a plurality of similar artificial rock cores, developing an artificial resonance wave foam flooding foaming characteristic simulation experiment by adopting a transparent sand filling pipe, recording the same experiment parameters by referring to a non-artificial resonance wave foam flooding foaming characteristic simulation experiment, closing an artificial resonance wave table, a displacement pump, a pressure measuring device and the like after the experiment is finished, and finishing the experiment table; and finally, collating the experimental data, and analyzing to obtain the change rules of the foam size and form, the gas channeling time and the free gas volume, the sand production condition and the crude oil recovery ratio under different vibration foam flooding experimental conditions.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (9)
1. The utility model provides a visual simulation experiment device of foaming characteristic is driven to transparent sand-packed pipe vibration foam, its characterized in that: the device comprises an artificial resonance wave test bed (1), a transparent sand filling pipe (2), a flat glass pipe (3), a three-phase separation device (4), a metering device (5), a camera device (6), an electromagnetic stirring device (7), a six-way valve (8), a foaming device (9), a middle transition gas transmission container (10), a middle transition foam liquid transmission container (11), a middle transition water transmission container (12), a middle transition oil transmission container (13), a displacement pump (14), a water storage tank (15), a gas source device (16) and a data processing device (25), wherein the transparent sand filling pipe (2) is fixed on the artificial resonance wave test bed (1), and the transparent sand filling pipe (2) comprises a detachable threaded end cover (17), a transparent pipe body (18), a magnetic rotor (19), a support rod (20), a screen sleeve (21), a cemented sand blocking sleeve (22), Artificial rock core (23) and reducing pipe (24) of sand-packed preparation, wherein, magnetic rotor (19) is laid at the inside injection end of transparent body (18), screen cover (21) with bracing piece (20) adopt threaded connection, cemented sand plug (22) with screen cover (21) are connected, reducing pipe (24) with artificial rock core (23) extraction end is connected, the length of bracing piece (20) is greater than the length of magnetic rotor (19), flat glass pipe (3) are laid under transparent sand-packed pipe (2) extraction end, camera device (6) are laid respectively directly over flat glass pipe (3) and transparent sand-packed pipe (2), electromagnetic stirring device (7) are laid under transparent sand-packed pipe (2) injection end, six-way valve (8) through the infusion pipeline with transparent sand-packed pipe (2) injection end is connected, the foaming device (9) mixes foam liquid and gas, the intermediate transition gas transmission container (10) is connected with the six-way valve (8) through a gas transmission pipeline, the intermediate transition foam liquid transmission container (11) is connected with the six-way valve (8) through a liquid transmission pipeline, the intermediate transition water transmission container (12) is connected with the six-way valve (8) through a water transmission pipeline, the intermediate transition oil transmission container (13) is connected with the six-way valve (8) through a gas transmission pipeline, the displacement pump (14) is connected with the intermediate transition foam liquid transmission container (11) and the intermediate transition gas transmission container (10), and the gas source device (16) is connected with the intermediate transition gas transmission container (10); the artificial resonance wave test bed (1) is controlled by a data processing device (25) to be opened and closed and adjust vibration parameters.
2. The visual simulation experiment device for the vibration foam flooding foaming characteristics of the transparent sand-packed pipe according to claim 1, is characterized in that: the metering device (5) is marked with scales for measuring the volume of fluid stored in the metering device, and the transparent tube body (18) is marked with scales for measuring the height of the artificial rock core and the fluid.
3. The visual simulation experiment device for the vibration foam flooding foaming characteristics of the transparent sand-packed pipe according to claim 1, is characterized in that: and a pressure measuring device (26) for detecting the fluid flowing through the air source device (16) in real time is arranged on a pipeline connected with the six-way valve (8).
4. The visual simulation experiment device for the vibration foam flooding foaming characteristics of the transparent sand-packed pipe according to claim 1, is characterized in that: and another screen sleeve with the same specification is arranged between the artificial rock core (23) and the reducing pipe (24), and the directions of the two screen sleeves are opposite.
5. The visual simulation experiment device for the vibration foam flooding foaming characteristic of the transparent sand-packed pipe according to claim 4, is characterized in that: the inner ring of the screen sleeve (21) is a sand control net with a certain mesh number, the outer ring of the screen sleeve made of metal is provided with a core claw for fixing the cemented sand plug (22), the other side of the outer ring of the screen sleeve is drilled with threaded holes, the number of the threaded holes is the same as that of the support rods (20), and the outer diameter of the screen sleeve is the same as the inner diameter of the transparent pipe body (18).
6. The visual simulation experiment device for the vibration foam flooding foaming characteristics of the transparent sand-packed pipe according to claim 1, is characterized in that: the shape of reducing pipe (24) is for leaking hopper-shaped, and the preparation material is glass or resin, and the biggest external diameter that leaks hopper-shaped is the same with the internal diameter of transparent body (18), the afterbody of reducing pipe (24) passes screw end cover (17) of transparent sand-packed tube extraction end, utilizes resin or waterproof sticky tape to realize sealing between screw end cover and the afterbody, and the afterbody of reducing pipe passes through rubber tube (27) and is connected with flat glass pipe (3).
7. The visual simulation experiment device for the vibration foam-driving foaming characteristics of the transparent sand-packed pipe according to claim 1 or 6, wherein: the flat glass tube (3) is a transparent glass tube which is flattened at the middle position, the inner section of the flattened position is rectangular or oval, and the height of the inner section is less than or equal to 2 mm.
8. A visual simulation experiment method for the vibration foam flooding foaming characteristics of the transparent sand-filled pipe is realized by the visual simulation experiment device for the vibration foam flooding foaming characteristics of the transparent sand-filled pipe according to any one of claims 1 to 7, and is characterized by comprising the following steps of:
step S1, a static foaming characteristic measurement experiment, which comprises the following steps:
s101, foam generation volume and half-life measurement: preparing foam liquid, placing the foam liquid in a stirring cup, stirring the foam liquid by using an electromagnetic stirring device (7) to form foam, measuring the volume of the formed foam, and recording the half-life period of the foam;
s102, foam size measurement: configuring and stirring the foam according to the step 101 to form the same foam, placing a small amount of foam in a flat glass tube (3), recording the position, which is just opposite to the flat glass tube, of a camera device (6), observing the size and the shape of the foam, adjusting the distance between the camera device and the flat glass tube and the focal distance of the camera device to ensure clear images, and transmitting the data to a data processing device (8);
s103, repeating the step S101, changing the rotating speed of the electromagnetic stirring device, measuring the foam forming volume and the foam half-life period at different rotating speeds, and observing the size and the form change of the foam;
step S2, simulating a foaming characteristic simulation experiment of the non-artificial resonant wave foam flooding, wherein the experiment process is as follows:
s201, preparing transparent sand filling pipes: a cemented sand plug (22) made by mixing resin and core sand is arranged on a screen sleeve (21), and a core claw on the screen sleeve clamps the cemented sand plug; the support rod (20) is ensured to be firmly connected with the screen sleeve; the magnetic rotor (19) and the screen sleeve are sequentially arranged in a transparent sand filling pipe; mixing resin with a certain volume with core sand according to the requirements of permeability and porosity of the artificial core, pouring the mixture into a transparent sand filling pipe for multiple times, slightly compacting, and simultaneously ensuring that a sand control net on a screen sleeve is not crushed; coating a layer of curable resin with sealing function on the tail part of the reducing pipe (24) and the threaded end cover, enabling the tail part of the reducing pipe to penetrate through the central hole of the threaded end cover (17), and then placing the reducing pipe into the transparent sand filling pipe; connecting and sealing the threaded end cover of the extraction end with a transparent pipe body (18) of the transparent sand filling pipe; standing for a period of time, and waiting for the cooling and solidification of the resin at the artificial rock core or the reducing pipe;
s202, connecting device, saturated simulated formation water and simulated oil: connecting the transparent sand-filled pipe (2) to a simulation experiment device, starting a displacement pump (14), displacing simulated formation water into the transparent sand-filled pipe, testing the sealing performance of the experiment device, continuing to displace after the sealing is complete, recording the pressure and the displacement volume to obtain the porosity of a rock core, and stopping when the pressure is kept stable at the injection end after the displacement; carrying out saturated simulation oil on the artificial rock core (23) in the transparent sand filling pipe; then, simulating water drive, forming certain initial water saturation in the artificial rock core, and stopping a pump;
s203, foam flooding foaming characteristic simulation: injecting a certain amount of foam liquid into the artificial rock core of the transparent sand filling pipe, recording the pressure change in the displacement process, and keeping the electromagnetic stirring device (7) closed all the time in the process; then, according to the requirement of the injected gas-liquid ratio, injecting a certain amount of gas into the artificial core of the transparent sand filling pipe; recording the pressure and the displacement volume change in the displacement process, measuring the size and the form of foam in the flat glass tube (3) at the extraction end and the fluid distribution change in the transparent sand filling tube by using a camera device (6), and respectively recording the gas volume and the volume change of the extracted oil in the three-phase separation device and the metering device (5) before and after the foam reaches the three-phase separation device (4);
s204, foam driving and defoaming feature simulation: replacing the artificial rock core (23), preparing transparent sand filling pipe filling according to the steps S201 to S202, saturating the simulated formation water and the saturated simulated oil, opening the electromagnetic stirring device (7) and keeping high rotating speed; adjusting a switch to enable the foam liquid and the gas to flow through a foaming device (9), setting different pump injection flow rates of a displacement pump (14) for driving the foam liquid and the gas according to the requirement of the gas-liquid ratio, and simultaneously injecting the foam liquid and the gas into a transparent sand filling pipe (2); recording the pressure, the displacement volume, the foam size and form, the fluid distribution in the transparent sand-filled pipe, the gas volume in the three-phase separation device (4) and the metering device (5) and the change of the volume of the produced oil in the displacement process;
s205, repeating the steps S201 to S204, changing the permeability, the porosity and the initial water saturation of the artificial rock core (23), the gas-liquid ratio of foam flooding, the displacement flow rate and the rotating speed of the electromagnetic stirring device (7), and measuring the pressure, the displacement volume, the foam size and form, the fluid distribution in the transparent sand filling pipe (2), the gas volume and the produced oil volume in the three-phase separation device (4) and the metering device (5) in the displacement process under different experimental conditions;
s3, replacing the rock core and simulating the foaming characteristic of the artificial resonance wave foam flooding at different vibration parameters, wherein the simulation process comprises the following steps:
s301, pre-running of an artificial resonance wave test bed: controlling the test bed (1) for starting the artificial resonance waves to start by using a data processing device (8), setting vibration frequency and vibration acceleration, setting the pre-running time to be 20-40 min, and then suspending the test bed for the artificial resonance waves to run;
s302, connecting device, saturated simulated formation water and simulated oil: repeating the step S201, changing the permeability and porosity of the artificial rock core (23), fixing the transparent sand filling pipe (2) prepared for filling on the artificial resonance wave test bed (1), and respectively connecting the transparent sand filling pipe with the series devices of the injection end and the extraction end; repeating the step S202 to simulate formation water and simulated oil for artificial core saturation;
s303, foam flooding foaming characteristic simulation under a vibration condition: injecting foam liquid with the same volume into an artificial rock core (23) of the transparent sand filling pipe (2), recording the pressure change in the displacement process, and keeping the electromagnetic stirring device (7) closed all the time in the process; after the foam liquid is injected, starting the artificial resonance wave test bed (1); then, injecting gas with the same volume into the artificial rock core of the transparent sand filling pipe under the conditions of the same gas-liquid ratio and displacement flow rate; the method comprises the following steps of (1) accompanying sand production in the vibrating foam flooding process of the loose artificial rock core, recording the sand production vacancy condition and the sand production amount of a production end, and recording the pressure, the displacement volume, the foam size and form, the fluid distribution in a transparent sand filling pipe, the gas volume in a three-phase separation device (4) and a metering device (5) and the change of the volume of produced oil in the vibrating foam flooding process;
s304, foam flooding defoaming characteristic simulation under the vibration condition: repeating the step S301 and the step S302, and carrying out filling preparation of the transparent sand filling pipe, saturated simulation of formation water and saturated simulation oil; opening the electromagnetic stirring device (7) and keeping high rotating speed, and starting the artificial resonance wave test bed (1); in a synchronous step S204, the switch is adjusted to enable the foam liquid and the gas to flow through the foaming device (9), and the foam liquid and the gas are simultaneously injected into the transparent sand filling pipe (2) under the conditions of similar foam liquid and gas pump injection flow rate; recording the pressure, the displacement volume, the foam size and the foam form, the fluid distribution in the transparent sand filling pipe, the sand output, the gas volume in the three-phase separation device (4) and the metering device (5) and the change of the volume of the produced oil in the vibration foam flooding process;
s305, repeating the steps S301 to S304, changing the vibration frequency, the vibration acceleration and the vibration running time, changing the permeability, the porosity and the initial water saturation of the artificial rock core (23), the gas-liquid ratio of foam flooding, the displacement flow and the rotating speed of the electromagnetic stirring device (7), and measuring the pressure, the displacement volume, the foam size and form, the fluid distribution in the transparent sand filling pipe (2), the sand output, the gas volume in the three-phase separation device (4) and the metering device (5) and the change of the produced oil volume in the displacement process under different experimental conditions;
step S4, data processing: calculating the gas volume of gas channeling according to the experimental data recorded in the steps S101 to S103, S203 to S205 and S303 to S305, comparing the results of the static foaming characteristic measurement experiment, the non-artificial resonant wave foam flooding foaming characteristic simulation experiment and the artificial resonant wave foam flooding foaming characteristic simulation experiment, analyzing the influence of the vibration on the foam forming and defoaming rules, and analyzing the changes of the foam size and form, the crude oil recovery ratio, the gas channeling time and the free gas volume under different vibration foam flooding experimental conditions.
9. The visual simulation experiment method for the vibration foam flooding foaming characteristics of the transparent sand-packed pipe according to claim 8, is characterized in that: controlling the injection volume of the foam liquid not to exceed 0.3PV and controlling the pressure of the injection end of the transparent sand filling pipe not to exceed 1.0MPa in the displacement process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811616287.5A CN109723415B (en) | 2018-12-28 | 2018-12-28 | Visual simulation experiment device and method for vibration foam flooding foaming characteristics of transparent sand filling pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811616287.5A CN109723415B (en) | 2018-12-28 | 2018-12-28 | Visual simulation experiment device and method for vibration foam flooding foaming characteristics of transparent sand filling pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109723415A CN109723415A (en) | 2019-05-07 |
| CN109723415B true CN109723415B (en) | 2019-12-31 |
Family
ID=66296605
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811616287.5A Active CN109723415B (en) | 2018-12-28 | 2018-12-28 | Visual simulation experiment device and method for vibration foam flooding foaming characteristics of transparent sand filling pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109723415B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110672468B (en) * | 2019-10-31 | 2023-04-07 | 中国石油天然气股份有限公司 | Fluid viscosity measuring device and method |
| CN110763599B (en) * | 2019-11-04 | 2022-05-06 | 中国石油大学(华东) | Experimental device and method for testing performance and defoaming separation effect of foamed fluid |
| CN113514630A (en) * | 2020-04-09 | 2021-10-19 | 中国石油天然气股份有限公司 | Gear oil performance evaluation device and gear oil performance evaluation method |
| CN111594159B (en) * | 2020-06-12 | 2022-08-26 | 西南石油大学 | Device and method for testing flow line distribution in seepage process |
| CN112748316A (en) * | 2020-12-31 | 2021-05-04 | 安徽新皖能检测有限公司 | Withstand voltage detection device for insulating oil and withstand voltage detection method thereof |
| CN113685175B (en) * | 2021-08-18 | 2023-09-15 | 中国科学院武汉岩土力学研究所 | Method and device for underground depth-fixing in-situ comprehensive experiment |
| CN114278258B (en) * | 2021-09-24 | 2023-07-18 | 中国海洋石油集团有限公司 | Length-adjustable temperature-resistant visual sand filling pipe |
| CN114088879B (en) * | 2021-11-16 | 2022-07-29 | 中国石油大学(北京) | Carbon dioxide water-based three-phase foam internal phase evolution and cooperative plugging regulation testing device and application thereof |
| CN114414735B (en) * | 2021-12-24 | 2023-09-29 | 中海油能源发展股份有限公司 | Device and method for evaluating dynamic foaming effect of simulated stratum condition foam |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE894580A (en) * | 1982-10-04 | 1983-01-31 | Willems Michel | Forming wood-simulating hard polyurethane foam component - using two-part mould produced from pretreated pattern in wood to be simulated |
| CN102809518B (en) * | 2012-08-27 | 2014-04-02 | 中国石油大学(华东) | Device and method for measuring gas phase saturation of parallel core during foam displacement |
| CN102980828B (en) * | 2012-08-27 | 2015-07-15 | 中国石油大学(华东) | Apparatus and method for measuring gas phase saturation degree of single tube core during foam flooding process |
| CN103334726A (en) * | 2013-07-04 | 2013-10-02 | 中国石油大学(华东) | Variable high-temperature high-pressure visual rock core model holding device |
| CN203835304U (en) * | 2014-04-11 | 2014-09-17 | 中国石油大学(北京) | Foam discharging shaft sand carrying visualization experiment device |
| CN104502059B (en) * | 2014-12-02 | 2017-07-04 | 中国石油大学(华东) | Foam stabilization system safety testing device and method of work under a kind of pressure oscillation |
| CN108179999A (en) * | 2017-12-30 | 2018-06-19 | 东北石油大学 | Compare the method and apparatus in carbon dioxide-foam flooding displacement stage |
-
2018
- 2018-12-28 CN CN201811616287.5A patent/CN109723415B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN109723415A (en) | 2019-05-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109723415B (en) | Visual simulation experiment device and method for vibration foam flooding foaming characteristics of transparent sand filling pipe | |
| CN105178926B (en) | Fractured-cavernous carbonate reservoir physical model, displacement simulation experimental provision and system | |
| CN103471976B (en) | A kind of device measured containing hydrate porous deposit permeability | |
| CN106884635B (en) | Low and ultra-low permeability reservoir CO2Method for measuring minimum flooding miscible pressure | |
| CN107816342B (en) | Visualization experiment device and method for migration rule of proppant in crack | |
| CN105041280B (en) | A kind of carbon dioxide mixed phase that realizes drives the method and apparatus of laboratory experiment | |
| CN105388254B (en) | HTHP foam fracturing fluid leak-off damage experiment system | |
| CN104729972B (en) | Determine the method and device of carbonate rock Gas And Water Relative Permeability | |
| CN106644871A (en) | Evaluating method of oil and gas reservoir seepage by supercritical carbon dioxide fracturing fluid and method thereof | |
| CN108507919B (en) | Shale full-diameter core starting pressure test method under radial flow flowing mode | |
| CN105178927B (en) | A kind of displacement simulation experimental provision and system | |
| CN113640467A (en) | Method for evaluating plugging and plugging removal effects of plugging material | |
| CN110541691A (en) | Visual water displacement experimental device and method for heterogeneous sandstone reservoir | |
| CN103940715A (en) | Simulating experiment method of rock natural seepage ability | |
| CN111487172A (en) | Device and method for evaluating flow conductivity of acid-etched fracture of tight reservoir core | |
| US11905812B2 (en) | Intra-layer reinforcement method, and consolidation and reconstruction simulation experiment system and evaluation method for gas hydrate formation | |
| CN108266166A (en) | A kind of fractured reservoir fluctuates recover the oil microcosmic jet stream anatonosis mechanism evaluation experimental device and method | |
| CN105571988B (en) | A kind of polymer thermostable detection device and detection method | |
| CN104121003A (en) | Experiment device and method for controlling gel liquid flow by means of low-frequency resonance waves | |
| Golovin et al. | Injection rate effects on waterflooding mechanisms and injectivity in cohesionless sand | |
| Ross et al. | The effect of simulated CO2 flooding on the permeability of reservoir rocks | |
| CN205089298U (en) | Fracture type carbonate oil reservoir physical model , displacement simulation experiment device and system | |
| CN107907464A (en) | A kind of pressure break infiltration stone cement slurry property measurement device and method | |
| CN201795982U (en) | Device for evaluating anti-sand performance of sieve tube | |
| CN109098700A (en) | Artificial Seismic Wave composite foam foam stability evaluating apparatus and method under the conditions of oil-containing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |