CN103670391A - Displacement experiment fluid control method and experiment device - Google Patents
Displacement experiment fluid control method and experiment device Download PDFInfo
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- CN103670391A CN103670391A CN201310727386.1A CN201310727386A CN103670391A CN 103670391 A CN103670391 A CN 103670391A CN 201310727386 A CN201310727386 A CN 201310727386A CN 103670391 A CN103670391 A CN 103670391A
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Abstract
The invention provides a displacement experiment fluid control method and an experiment device. The displacement experiment fluid control method comprises the following steps: injecting saturated fluid into the pore canal of the inner model by an inlet connecting pipe communicated with the inner model of the displacement experimental device until the saturated fluid step is completed; and directly injecting the displacement fluid into the pore canal of the inner model through a pipeline directly communicated with the inner model to carry out the displacement step. The displacement experimental device comprises: the outer model is arranged in the inner model in the outer model, one end of a pore passage of the inner model is connected with an inlet connecting pipe, the inlet connecting pipe is connected with a saturated fluid conveying device, a fluid switch is arranged on the pore passage of the inner model close to the inlet connecting pipe, and a control device capable of controlling the fluid switch to be switched on and off is arranged outside the outer model. The displacement experiment fluid control method and the displacement experiment fluid control experiment device can directly convey the displacement fluid into the inner model pore canal through the injection pipeline, so that the displacement experiment speed is accelerated, the experiment precision is improved, and the displacement experiment fluid control method and the displacement experiment fluid control experiment device are particularly suitable for microcosmic displacement experiments.
Description
Technical Field
The invention relates to the technical field of oil and gas field development experiments, in particular to a displacement experiment fluid control method and an experiment device capable of realizing the method.
Background
The high-temperature high-pressure microscopic displacement experiment is an important means for researching the seepage mechanism in the water-flooding, gas-flooding and chemical oil-flooding processes, and by utilizing the experiment, not only can the oil reservoir conditions be simulated really, but also the seepage condition in the oil reservoir can be observed visually, so that the method is favorable for summarizing the seepage rule and provides reliable reference for the design of an oil reservoir scheme.
The micro inner model used in the micro displacement experiment has small pore throat size which is mostly micron-sized, and the fine control of the injected fluid has great influence on the observation effect of the displacement experiment; meanwhile, in the experiment, the high-temperature and high-pressure environment in a reservoir needs to be simulated, a high-temperature high-pressure kettle is used as an external model, and the narrow space in the kettle makes the installation and control of the fluid control valve very difficult. At present, the fine control of fluid mostly adopts a mode of additionally arranging a control valve outside a kettle, and the mode can conveniently and effectively control the flow of the fluid, but also has certain disadvantages:
(1) as shown in fig. 1, which is a schematic diagram of a conventional fluid control valve installed in a micro displacement experimental apparatus, a hole 13 of an inner model 10 of the displacement experimental apparatus is connected to an inlet connection pipe 12 extending to the outside of an outer model 16, a saturated fluid a enters the inner model 10 through the inlet connection pipe 12, when the saturated fluid a completes a saturation process to the micro inner model 10, a part of the saturated fluid a remains in the inlet connection pipe 12 in addition to the saturated fluid a in the hole 13 of the inner model 10, although the inlet connection pipe 12 is not very long, due to the micro displacement experiment, the volume of the inlet connection pipe 12 is considerable compared with the volume of the hole 13 of the inner model 10, when a three-way steering valve 11 (i.e. a fluid control valve) is adjusted to displace the saturated fluid a with a displacement fluid B, the part of the saturated fluid a in the inlet connection pipe 12 needs to be firstly displaced to enter the micro inner model 10, in the process, the flow rate control of the displacement fluid B becomes very difficult, the speed is too high, the time for the displacement fluid B to pass through the inner model 10 is short, and the displacement process in the inner model 10 is difficult to observe; the speed is too slow, the time for waiting for the displacement fluid B to pass through the inner model 10 is very long, and is often tens of minutes or even hours, so that the experiment speed is seriously influenced, and the working efficiency is reduced.
(2) In the displacement process, the residual saturated fluid A in the inlet connecting pipe 12 cannot be completely displaced in a short time, but remains on the inner wall of the pipeline for a long time, and is continuously carried into the microscopic internal model 10 in the displacement process, so that the monitoring of the displacement process in the microscopic internal model 10 is influenced, and the accuracy of experimental data is influenced.
(3) Particularly, when the gas-drive oil mixing process is observed, the injected gas firstly mixes with the oil in the inlet connecting pipe 12 and then enters the microscopic internal model 10, so that the gas-drive oil mixing process is difficult to observe in the microscopic internal model 10, and the adverse effect is generated on the deep research of the gas-drive oil mixing process.
In view of the defects of the known technology, the inventor develops the displacement experiment fluid control method and the displacement experiment fluid control experimental device according to production design experiences of the field and the related field for many years, so that the influence of residual fluid in a pipeline on a microscopic displacement experiment can be effectively reduced, and the experimental precision of a displacement process is improved.
Disclosure of Invention
The invention aims to provide a displacement experiment fluid control method and an experiment device, which are used for overcoming the defects in the background technology.
The invention discloses a displacement experiment fluid control method, which comprises the following steps: injecting saturated fluid into the pore canal of the inner model by an inlet connecting pipe communicated with the inner model of the displacement experimental device, and stopping injecting the saturated fluid after the step of injecting the saturated fluid is completed; and directly injecting the displacement fluid into the pore canal of the inner model through a pipeline directly communicated with the inner model to carry out the displacement step.
The displacement experimental device of the invention comprises: the outer model is arranged in the inner model in the outer model, one end of a pore passage of the inner model is connected with an inlet connecting pipe, the inlet connecting pipe is connected with a saturated fluid conveying device, a fluid switch is arranged on the pore passage of the inner model close to the inlet connecting pipe, and a control device capable of controlling the fluid switch to be switched on and off is arranged outside the outer model.
Compared with the prior art, the displacement experiment fluid control method and the displacement experiment fluid control device have the advantages that:
1. the displacement experiment fluid control method and the displacement experiment fluid control device can reduce the contact between the displacement fluid and the saturated fluid reserved in the inlet connecting pipe, realize the real-time effective control of the fluid flow path, and prevent the saturated fluid injected into the inlet connecting pipe during the previous saturation step from being injected into the inner model pore passage in the displacement process, thereby accelerating the experiment speed and improving the working efficiency.
2. According to the invention, the displacement fluid is directly conveyed into the inner model pore canal through the injection pipeline in the displacement process, so that the saturated fluid reserved in the inlet connecting pipe can be avoided, the injected displacement fluid amount can be more accurate, the adverse effect on the observation of the displacement process caused by the saturated fluid reserved in the inlet connecting pipe can be reduced or eliminated, and the experiment precision of the microscopic model displacement experiment is improved.
3. According to the displacement experiment fluid control method and the displacement experiment fluid control experiment device, the control device arranged outside the external model is used for realizing accurate control of the fluid flow path in the fluid switch, so that the problem of remote control of the fluid switch is solved.
4. The fluid control method and the experimental device for the displacement experiment are particularly suitable for the microcosmic displacement experiment.
Drawings
The drawings are only for purposes of illustrating and explaining the present invention and are not to be construed as limiting the scope of the present invention. Wherein,
FIG. 1 is a schematic diagram of a displacement experiment apparatus of the prior art;
FIG. 2 is a schematic diagram of one embodiment of a displacement experiment apparatus of the present invention;
FIG. 3 is an enlarged partial schematic view of the tubular fluid switch of FIG. 2 at the junction with the inner mold;
FIG. 4 is a schematic diagram of one embodiment of a displacement experiment apparatus of the present invention;
FIG. 5 is an enlarged partial schematic view of the connection of the tubular fluid switch of FIG. 4 to the inner mold;
FIG. 6 is a schematic view of the combination of the tubular fluid switch and control device of FIG. 2;
FIG. 7 is a schematic sectional view taken along line C-C of FIG. 6;
FIG. 8 is a schematic sectional view taken along line D-D in FIG. 6;
FIG. 9 is a schematic view of another embodiment of a displacement experiment apparatus of the present invention;
FIG. 10 is a schematic view of the combination diaphragm fluid switch and control device of FIG. 9;
FIG. 11 is a top view of a diaphragm fluid switch;
FIG. 12 is an exploded schematic view of the housing of the diaphragm fluid switch;
FIG. 13 is a top view of the diaphragm ring in combination with the elastomeric diaphragm;
FIG. 14 is a schematic cross-sectional view of a membrane ring;
FIG. 15 is a front view of the elastic diaphragm;
FIG. 16 is a schematic view of a deflected state of the elastic diaphragm;
FIG. 17 is a schematic view of another state of deflection of the elastomeric membrane.
Main element number description:
10 inner model 11 three-way steering valve 12 inlet connecting pipe
13 orifice 14 saturated fluid control pump 15 displacement fluid control pump
16 outer model 17 confining pressure control system 18 adhesive
19 injection line 20 control line
1-tube fluid control device
221 open end 23 inlet orifice plate 231 first inlet passage
232 second inlet passage 24 outlet orifice 241 outlet passage
25 outer space of elastic membrane body
3 reducing tee 31 inner pipe 32 outer pipe
33 tubular body 34 housing 35 first channel
36 second channel
2' diaphragm type fluid switch 21' shell 211' box body
212 'end cap 22' elastic diaphragm
23' membrane ring 24' outlet 25' opening valve
26' shut-off port 27' first chamber 28' second chamber
4. 4' steering tee joint
5. 5' control device
Saturated fluid A and displacement fluid B
M, M' outlet
N, N' outlet
Detailed Description
The invention provides a displacement experiment fluid control method, which comprises the following steps: injecting saturated fluid into the pore canal of the inner model by an inlet connecting pipe communicated with the inner model of the displacement experimental device, and stopping injecting the saturated fluid after the step of injecting the saturated fluid is completed; and directly injecting the displacement fluid into the pore canal of the inner model through a pipeline directly communicated with the inner model to carry out the displacement step.
The method of the invention realizes the control of injecting or stopping injecting the displacement fluid into the pore canal by installing a fluid switch on the pore canal of the inner model close to the inlet connecting pipe, arranging the fluid switch in the outer model outside the inner model and controlling the opening or closing of the fluid switch by a control device arranged outside the outer model.
The displacement experimental device provided by the invention comprises: the outer model is arranged in the inner model in the outer model, one end of a pore passage of the inner model is connected with an inlet connecting pipe, the inlet connecting pipe is connected with a saturated fluid conveying device, a fluid switch is arranged on the pore passage of the inner model close to the inlet connecting pipe, and a control device capable of controlling the fluid switch to be switched on and off is arranged outside the outer model.
Wherein, the control device can be a steering tee joint, one end of the steering tee joint is connected with the displacement fluid conveying device, and the other end of the steering tee joint is connected with the fluid switch.
In one embodiment, the control device further comprises a reducing tee arranged between the fluid switch and the steering tee, wherein the reducing tee comprises a shell, an inner pipe penetrates through the shell, an outer pipe is sleeved outside the inner pipe, a first channel is formed in the inner pipe, and a second channel is formed between the outer pipe and the inner pipe; the shell is also communicated with a pipe body, and the pipe body is communicated with the second channel through the shell; each outer pipe, inner pipe, tube body and casing sealing connection.
Wherein the fluid switch is a tubular fluid switch and is provided with a tubular shell; an inlet orifice plate and an outlet orifice plate are respectively arranged at two ends of the shell, the inlet orifice plate is provided with a first inlet passage and a second inlet passage, and the outlet orifice plate is provided with an outlet passage; a bladder-like elastic membrane body capable of closing the outlet passage when inflated is provided in the housing, and an open end of the elastic membrane body is in communication with the first inlet passage of the inlet orifice plate.
In another embodiment, the control device is a three-way diverter valve having one end connected to the displacement fluid delivery device and the other end connected to the fluid switch. The fluid switch is a diaphragm type fluid switch, the diaphragm type fluid switch is provided with a shell, and the side wall of the shell is provided with a valve closing port and a valve opening port which are connected with the steering tee joint and an outlet which can be communicated with an inner model pore passage of the displacement experiment device; the elastic membrane is arranged in the shell, is fixedly connected with the inner wall of the shell and divides the shell into a first cavity and a second cavity which are not communicated; the outlet and the valve opening are communicated with the first cavity, and the valve closing opening is communicated with the second cavity.
One feasible technical scheme is that the fluid switch is connected with the pore channel, the central line of the fluid switch is orthogonal to the central line of the inlet connecting pipe and is arranged at the fluid inlet port close to the pore channel, and the fluid switch is fixedly connected with the inner model through adhesive glue.
The other feasible technical scheme is that the fluid switch is connected with the pore channel, the central line of the fluid switch is parallel to the central line of the inlet connecting pipe and is arranged at the fluid inlet port close to the pore channel, and the fluid switch is fixedly connected with the inner model through adhesive.
According to the displacement experiment fluid control method and the displacement experiment fluid control experiment device, the fluid switch is directly connected with the inner model, so that adverse effects on observation of a displacement process due to the fact that saturated fluid is reserved in a connecting pipeline can be reduced or eliminated. In addition, the opening and closing of the fluid switch are effectively controlled in real time through a control device outside the outer model, and the experimental precision of the displacement process is improved. Therefore, the defect that residual fluid in a saturation stage cannot be effectively prevented from entering an inner model pore passage during displacement due to the fact that a section of connecting pipeline exists between the control valve and the inner model because a conventional fluid control valve can only be installed outside the outer model is effectively overcome.
In order to clearly understand the technical features, objects and effects of the present invention, the following detailed description of the embodiments, structures, features and effects of the displacement experiment fluid control method and the experimental apparatus according to the present invention will be made with reference to the accompanying drawings and preferred embodiments. Furthermore, while the present invention has been described in connection with the preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but is intended to cover various modifications, alternative constructions, and arrangements included within the scope of the appended claims. Like parts are given like reference numerals.
As shown in fig. 2 and fig. 9, the displacement experiment fluid control method provided by the present invention includes: injecting a saturated fluid A into an inner model pore channel 13 through an inlet connecting pipe 12 communicated with an inner model 10 of the displacement experimental device, and stopping injecting the saturated fluid A after the saturated fluid step is completed; the displacement step is carried out by injecting the displacement fluid B directly into the inner mold tunnel 13 through a conduit 19 which is in direct communication with the inner mold 10.
A fluid switch is mounted on the inner mold tunnel 13 near the inlet connecting pipe 12 and is arranged in the outer mold 16 outside the inner mold 10, and the control device 5 arranged outside the outer mold 16 controls the opening or closing of the fluid switch, so that the control of injecting or stopping injecting the displacement fluid B into the tunnel 13 is realized.
Wherein, the fluid switch is fixedly connected with the inner model 10 through adhesive glue.
The invention also provides a displacement experimental device capable of realizing the control method. Fig. 2 and 4 are schematic diagrams of one embodiment of the displacement experiment device of the invention. As shown in fig. 2, the fluid switch of the displacement experiment apparatus in this embodiment is a tubular fluid switch 2, and the displacement experiment apparatus includes: the outer model 16, set up the inner model 10 in the outer model 16, one end of the pore 13 of the inner model 16 is connected with the inlet connecting pipe 12, another end is connected with the discharge outlet of the inner model 10, the inlet connecting pipe 12 is connected with the saturated fluid conveying appliance, the saturated fluid conveying appliance in this embodiment is the saturated fluid control pump 14, there are tubular fluid switches 2 on the pore 13 of the inner model 10 close to the inlet connecting pipe 12, the outside of the outer model 16 has controlling device 5 that can control the tubular fluid switch 2 to open and close, the controlling device in this embodiment includes turning to the tee bend 4 and reducing the tee bend 3, turn to the entrance of the tee bend 4 and link with the displacement fluid control pump 15, two exports are linked with the tubular fluid switch 2 through the reducing tee bend 3.
Fig. 2 shows an arrangement manner of the tubular fluid switch 2 on the hole 13 of the inner mold 10 in this embodiment, fig. 3 is a partial enlarged view of a connection portion of the tubular fluid switch 2 and the inner mold 10, a center line of the tubular fluid switch 2 is orthogonal to a center line of the inlet connection pipe 12, the tubular fluid switch 2 connected to the hole 13 is fixed outside the inner mold 10 by a bonding glue 18, the bonding glue 18 is selected according to a material filled in the outer mold 16, for example, glass glue, etc., and the bonding glue 18 has a better sealing performance due to confining pressure applied by the confining pressure control system 17. The specific material of the adhesive 18 is not limited as long as the tubular fluid switch 2 can be fixed to the inner mold 10.
Fig. 4 shows another arrangement of the tubular fluid switch 2 in the present embodiment on the duct 13 of the inner mold 10, fig. 5 is a partially enlarged view of the connection between the tubular fluid switch 2 and the inner mold 10, the center line of the tubular fluid switch 2 is parallel to the center line of the inlet connection pipe 12, and other structures are the same as the arrangement shown in fig. 2 and fig. 3, and therefore are not repeated.
As shown in fig. 6, 7 and 8, the tubular fluid switch 2 in this embodiment includes a tubular housing 21, an inlet orifice plate 23 and an outlet orifice plate 24 are respectively disposed at two ends of the housing 21, the inlet orifice plate 23 includes a first inlet passage 231 disposed at a middle portion thereof and a plurality of second inlet passages 232 circumferentially disposed between an outer wall of the first inlet passage 231 and an inner wall of the inlet orifice plate 23, the outlet orifice plate 24 includes a plurality of outlet passages 241 circumferentially disposed along an inner wall of the outlet orifice plate 24, and each outlet passage 241 is directly connected to the pore channel 13 of the inner mold 10 of the micro-displacement experimental apparatus. The first inlet passage 231 is a short pipe, and the short pipe is fixedly connected with the inner wall of the housing 21 through a connection rib plate. Similarly, the outlet orifice 24 is provided with a solid circular plate at the center, the circular plate is fixedly connected with the inner wall of the housing 21 through a connection rib plate, and the outlet passage 241 is formed between the circular plate and the housing 21.
In addition, as shown in fig. 6, a bag-shaped elastic membrane 22 is disposed in the housing 21 of the tubular fluid switch 2, the elastic membrane 22 is made of, for example, silicon rubber, has good elasticity and pressure resistance, and expands after being inflated, the open end 221 of the elastic membrane 22 is communicated with the first inlet passage 231 of the inlet orifice plate 23, and an elastic membrane outside space 25 is formed between the elastic membrane 22 and the housing 21.
In addition, referring to fig. 6 again, the reducer tee 3 of the tubular fluid switch 2 includes a hollow metal housing 34, an inner tube 31 penetrates the housing 34, one end of the inner tube 31 is communicated with the outlet M of the three-way diverter 4, and the other end is communicated with the first inlet passage 231 of the inlet orifice plate 23, so that the inner tube 31 forms a first channel 35 communicated with the elastic membrane 22. An outer tube 32 is sleeved on the outer part of the inner tube 31 between the tubular fluid switch 2 and the reducer tee 3 and extends to the shell 34, a second channel 36 is formed between the outer tube 32 and the inner tube 31, one end of the second channel 36 is communicated with the shell 34, and the other end of the second channel 36 is communicated with a second inlet passage 231 of the inlet orifice plate 23, so that the second channel 36 is further communicated with the space 25 outside the elastic membrane body and an outlet passage 241 arranged on the outlet orifice plate 24. The housing 34 is further communicated with a tube 33, one end of the tube 33 is communicated with the second channel 36 through the hollow housing 34, and the other end is communicated with the outlet N of the three-way steering 4. The inner tube 31, the outer tube 32 and the tube 33 are hermetically connected to the housing 34 through press caps, respectively.
As shown in fig. 2 and 4, in the displacement experiment apparatus of this embodiment, the tubular fluid switch 2 is connected to the pore passage 13 and is disposed at a fluid inlet port close to the pore passage 13, in a feasible technical solution, the tubular fluid switch 2 is communicated with the reducer tee 3 through an injection pipeline 19, and the injection pipeline 19 has a first channel 35 and a second channel 36 which are the same as and communicated with the reducer tee 3.
Fig. 9 is a schematic diagram of another embodiment of the displacement experiment apparatus of the present invention, as shown in fig. 9, the fluid switch of the displacement experiment apparatus in this embodiment is a diaphragm-type fluid switch 2', the control device 5' is a steering tee 4', an inlet of the steering tee 4' is communicated with the displacement fluid control pump 15, and two outlets are communicated with the diaphragm-type fluid switch 2', and other structures of the displacement experiment apparatus in this embodiment are the same as those of the embodiment shown in fig. 2 and 4, and therefore are not repeated.
As shown in fig. 10, the diaphragm type fluid switch 2' in this embodiment has a housing 21', a closing valve port 26' and an opening valve port 25' connected to the three-way diverter 4' are provided on the sidewall of the housing 21', and an outlet 24' capable of communicating with the pore channel 13 of the inner mold 10 of the displacement experiment apparatus; an elastic diaphragm 22 'is arranged in the housing 21' and is fixedly connected with the inner wall of the housing 21 'and divides the housing 21' into a first chamber 27 'and a second chamber 28' which are not communicated; the outlet 24', the opening port 25' communicate with the first chamber 27', and the closing port 26' communicates with the second chamber 28 '. The arrangement is such that when the opening valve 25 'is in communication with one outlet M' of the divert tee 4', displacement fluid B can pass through the outlet M' of the divert tee 4 'through the opening valve 25' into the first chamber 27; when shut-off port 26' is in communication with another outlet N ' of divert tee 4', displacement fluid B may flow through shut-off port 26' into second chamber 28' through outlet N ' of divert tee 4 '.
In one embodiment, the shut-off port 26' and the open port 25' are disposed orthogonally to the outlet 24 '. The outlet 24' is provided on one side wall of the housing 21', and the shut-off port 26' and the open port 25' are provided on the other side wall of the housing 21 '.
In another possible solution, the shut-off port 26 'is disposed at one end of the housing 21', the outlet 24 'is disposed at the other end of the housing 21', and the open-off port 25 'is disposed on a sidewall of the housing 21'. The positions of the outlet 24', the open valve 25' and the close valve 26' are not limited as long as the outlet 24, the open valve 25 and the close valve 26 are communicated with the first chamber 27 and the second chamber 28.
As shown in fig. 12, the housing 21 'is composed of a bottomed case body 211' and an end cap 212 'which is fixed to an opening portion of the case body 211' in a closed manner for easy assembly and maintenance.
Specifically, as shown in fig. 10, 11, and 12, the box body 211' is a hollow cylindrical metal body with one end closed, the end cap 212' is a circular steel component matching with the shape of the box body, the box body 211' and the end cap 212' are fixedly connected in a threaded manner, the outlet 24' is disposed on the end cap 212', the opening port 25', the closing port 26' and the outlet 24' are orthogonally disposed on the sidewall of the box body 211', the opening port 25' and the outlet 24' are both communicated with the first chamber 27', and the closing port 26' is communicated with the second chamber 28', wherein the opening port 25' and the closing port 26' are both metal thin tubes.
As shown in fig. 11, according to an embodiment of the present invention, the periphery of the elastic diaphragm 22 'is fixedly connected to a diaphragm ring 23', and the diaphragm ring 23 'is fixedly connected to the inner wall surface of the housing 21' in a sealing manner, so as to ensure that the first chamber 27 'and the second chamber 28' have good sealing performance, and prevent the fluid in the first chamber 27 'and the fluid in the second chamber 28' from flowing in a cross manner.
Specifically, referring to fig. 10 and fig. 13 to fig. 15, the elastic diaphragm 22 'is made of fluorinated silicone rubber, so that the elastic diaphragm 22' has the characteristics of temperature resistance (from-60 ℃ to +250 ℃ in the conventional manner), oxidation resistance, oil corrosion resistance, enhanced chemical stability and poor mechanical strength, the temperature range meets the requirements of oil and gas field development experiments, enhanced chemical stability and better elasticity and pressure resistance, and is not damaged under the conventional displacement pressure, meanwhile, the diaphragm ring 23 'is an elastic rubber ring, the diaphragm ring 23' is clamped and fixed on the outer side of the circular elastic diaphragm 22 'matched with the shape of the diaphragm ring, and the diaphragm ring 23' is fixedly connected with the inner wall surface of the housing 21', and the conventional technology for fixing the diaphragm ring 23' and the elastic diaphragm 22 'and the inner wall surface of the housing 21' is omitted for further description.
As shown in fig. 16, due to the better elasticity and pressure resistance of the elastic diaphragm 22', when the second chamber 28' is filled with the displacement fluid B entering from the closing port 26', the elastic diaphragm 22' will be biased toward the first chamber 27', thereby closing the outlet 24' and closing the diaphragm type fluid switch 2 '; as shown in fig. 17, if the injection of the displacement fluid B into the second chamber 28' is stopped, and the displacement fluid B is injected into the first chamber 27' through the open valve port 25', at this time, although the second chamber 28' is in a sealed state, the process of injecting the displacement fluid B into the first chamber 27' through the open valve port 25' is a boosting process, and when the pressure in the first chamber 27' is slightly higher than that in the second chamber 28', the second chamber 28' is compressed, and the elastic diaphragm 22' is reversely biased toward the second chamber 28', so that the outlet 24' is opened, and the diaphragm type fluid switch 2' is opened.
In the present embodiment, as shown in fig. 9 and 10, the diaphragm type fluid switch 2 'is connected to the pore channel 13 and is disposed near the fluid inlet port of the pore channel 13, so that in a micro displacement experiment, when the displacement fluid B enters the first chamber 27' of the diaphragm type fluid switch 2 'and opens the outlet 24' of the diaphragm type fluid switch 2', the displacement fluid B directly enters the pore channel 13 of the inner mold 10 connected with the displacement fluid B through the outlet 24' to start displacing the saturated fluid a.
In the present embodiment, as shown in fig. 9, 16 or 17, the center line of the diaphragm type fluid switch 2 'connected to the orifice 13 is perpendicular to the center line of the inlet connection pipe 12, the diaphragm type fluid switch 2' is fixed to the outside of the inner mold 10 by the adhesive 18, and the adhesive 18 is selected according to the material filled in the outer mold 16. In a feasible technical scheme, the open valve port 25 'and the close valve port 26' of the diaphragm type fluid switch 2 'are respectively communicated with the steering tee joint 3' through the injection pipeline 19 and the control pipeline 20, so that in the process of saturated fluid, the displacement fluid B can enter the diaphragm type fluid switch 2 'through the control pipeline 20, and the outlet 24' is closed; during the displacement of the fluid, the displacement fluid B can enter the diaphragm fluid switch 2 'through the injection conduit 19 and open the outlet 24' for the displacement step.
The displacement experiment fluid control method of the invention is further explained by combining the displacement experiment device:
step 1: starting a displacement fluid conveying device, and controlling a flow path of the displacement fluid B through a control device arranged outside the outer model 10, so as to close a fluid switch which is arranged on the pore passage 13 of the inner model 10 and is fixedly connected with the inner model 10 through adhesive 18;
step 2: starting a saturated fluid conveying device, injecting a saturated fluid A into a pore channel 13 of an inner model 10 by an inlet connecting pipe 12 communicated with the inner model 10 of the displacement experimental device, and stopping the injection of the saturated fluid A after the saturated fluid step is completed;
and step 3: the flow path of the displacement fluid B is changed by the control device, so that the fluid switch is turned on, and the displacement fluid B is directly injected into the pore channel 13 of the inner model 10 to perform the displacement step.
In order to further understand the displacement experiment fluid control method and the experimental apparatus of the present invention, the working principle of the displacement experiment fluid control method and the experimental apparatus of the present invention is described below with reference to the first embodiment of the displacement experiment apparatus of the present invention.
Referring to fig. 2 and 6, taking a gas flooding oil micro displacement experiment as an example, the experimental steps and the working flow are as follows:
experimental preparation: a saturated oil sample (i.e., saturated fluid a) and a displacement gas sample (i.e., displacement fluid B) were prepared under experimental temperature and pressure conditions. The method comprises the steps of connecting a pipeline of a displacement experiment device, fixing a tubular fluid switch 1 on a pore channel 13 of an inner model 10 in an outer model 16, fixing a control device 5 comprising a reducing tee joint 3 and a steering tee joint 4 outside the outer model 16, and testing the tightness of the pipeline.
The turning tee 4 is adjusted to enable the outlet M of the turning tee to be communicated with the inner pipe 31, after a valve of the fluid control pump 15 is opened, the displacement gas sample enters the first channel 35 in the inner pipe 31 and enters the elastic membrane body 22 through the first inlet passage 231 communicated with the first channel 35, the elastic membrane body 22 continuously expands until the outlet passage 241 is closed, and therefore the closing of the tubular fluid switch 1 is achieved through the control device 5 arranged outside the microscopic outer model 16.
The process of saturated fluid: and opening a valve of a fluid control pump 14, injecting a saturated oil sample into the pore channel 13 of the inner model 10 through an inlet connecting pipe 12 communicated with the pore channel 13 of the microscopic inner model 10 of the displacement experimental device, finishing a saturated fluid step when most of the pore channels 13 in the inner model 10 are saturated by the saturated oil sample, and stopping the injection of the saturated oil sample.
③ displacement process: the turning tee 4 is slowly adjusted to make the outlet N of the turning tee 4 communicated with the pipe body 33 (because the size of the pore canal 13 in the microscopic inner model 10 is small and is mostly micron-sized, the turning tee 4 needs to be slowly adjusted to ensure the stability of the fluid in the system, and simultaneously, the situation that the displacement process is difficult to observe due to too short displacement time is avoided), the displacement gas sample enters the pipe body 33 from the turning tee 4, enters the second channel 36 through the shell 34, and then enters the elastic membrane body outer space 25 in the tubular fluid switch 2 through the second inlet passage 232, at this time, although the inner cavity of the elastic membrane body 22 and the first channel 35 are in a sealed state, the process of injecting the displacement gas sample into the elastic membrane body outer space 25 through the second inlet passage 232 is a boosting process, when the pressure in the elastic membrane body outer space 25 is slightly higher than the inner cavity of the elastic membrane body 22, the elastic membrane body 22 is compressed, so as to open the outlet passage 241, the opening of the tubular fluid switch 2 is thus effected by a control device arranged outside the outer mould 16. Then, the displacement gas sample is directly injected into the pore canal 13 of the inner model 10 through an injection pipeline 19 directly communicated with the pore canal 13 of the inner model 10, the saturated oil sample is started to be displaced, and a camera can be used for recording the displacement process.
And fourthly, finishing the gas flooding oil micro displacement experiment, and finishing the flow and the equipment.
The fluid control method and the experimental device for the displacement experiment are particularly suitable for the microcosmic displacement experiment, the fluid switch is implanted on an inner model 10 of the microcosmic displacement experimental device, and because the inner model 10 is arranged in an outer model 16, the control devices 5 and 5' are separated from the fluid switches 2 and 2' for convenient installation and effective control, namely the fluid switches 2 and 2' are arranged on the inner model 10, and the control devices 5 and 5' of the fluid switches are arranged outside the outer model 16, so that the fluid switches 2 and 2' are conveniently and effectively controlled. In the method for realizing remote control of the fluid switches 2 and 2', the invention adopts a mode of controlling the fluid to compress the elastic membrane as opening or closing the fluid switches 2 and 2'. The use of this fluid on-off control method in micro-displacement experiments requires that an injection line 19 for the displacement fluid B alone be introduced directly into the bore 13 of the inner model 10 of the micro-model.
The displacement experiment fluid control method and the displacement experiment fluid control experiment device can reduce the contact between the displacement fluid B and the saturated fluid A reserved in the inlet connecting pipe 12, realize the real-time effective control of the fluid flow path, and prevent the saturated fluid A injected into the inlet connecting pipe 12 in the previous saturation step from being injected into the pore channel 13 of the inner model 10 in the displacement process. In addition, by using the displacement experiment fluid control method and the displacement experiment fluid control device in the displacement process, the displacement fluid B can be directly conveyed into the pore channel 13 of the inner model 10 through the injection pipeline 19, and the saturated fluid A remained in the inlet connecting pipe 12 is avoided, so that the amount of the injected displacement fluid B is more accurate, the accurate control on the fluid flow path is realized, and the observation effect and the efficiency of the displacement experiment of the microscopic model are improved.
The above description is only an exemplary embodiment of the present invention, and is not intended to limit the scope of the present invention. Any equivalent changes and modifications that can be made by one skilled in the art without departing from the spirit and principles of the invention should be considered within the scope of the invention. It should be noted that the components of the present invention are not limited to the above-mentioned whole application, and various technical features described in the present specification can be selected to be used alone or in combination according to actual needs, so that the present invention naturally covers other combinations and specific applications related to the invention.
Claims (14)
1. A displacement experiment fluid control method, comprising: injecting saturated fluid into the inner model pore channel by an inlet connecting pipe communicated with an inner model of the displacement experimental device, and stopping injecting the saturated fluid after the saturated fluid step is completed; and directly injecting a displacement fluid into the pore canal of the inner model through a pipeline directly communicated with the inner model to carry out the displacement step.
2. The displacement experiment fluid control method according to claim 1, wherein a fluid switch is installed on the inner model orifice close to the inlet connecting pipe, the fluid switch is arranged in an outer model outside the inner model, and a control device arranged outside the outer model controls the opening or closing of the fluid switch, so that the injection or stop of the displacement fluid into the orifice is controlled.
3. The displacement experiment fluid control method according to claim 1 or 2, wherein the fluid switch is fixedly connected with the inner model through adhesive glue.
4. A displacement experiment apparatus, comprising: the device comprises an outer model and an inner model arranged in the outer model, wherein one end of a pore passage of the inner model is connected with an inlet connecting pipe.
5. The displacement testing device according to claim 4, wherein the control device is a steering tee, one end of the steering tee is connected with the displacement fluid delivery device, and the other end of the steering tee is connected with the fluid switch.
6. The displacement experiment device according to claim 5, wherein the control device further comprises a reducer tee disposed between the fluid switch and the steering tee, the reducer tee comprising a housing, an inner tube disposed through the housing, an outer tube disposed outside the inner tube, the inner tube defining a first passage therein, the outer tube defining a second passage therebetween; the shell is also communicated with a pipe body, and the pipe body is communicated with the second channel through the shell; each outer pipe, inner pipe and pipe body are connected with the shell in a sealing mode.
7. The displacement testing apparatus of claim 6, wherein the fluid switch is a tube-type fluid switch having a tube-type housing; an inlet orifice plate and an outlet orifice plate are respectively arranged at two ends of the shell, the inlet orifice plate is provided with a first inlet passage and a second inlet passage, and the outlet orifice plate is provided with an outlet passage; a bladder-like elastic membrane capable of closing the outlet passage when inflated is disposed within the housing, the open end of the elastic membrane communicating with the first inlet passage of the inlet orifice plate.
8. The displacement experiment device according to claim 7, wherein the first inlet passage is arranged in the middle of the inlet orifice plate, and a plurality of second inlet passages are arranged between the first inlet passage and the inner wall of the inlet orifice plate along the circumferential direction; the elastic membrane body is communicated with a first channel of the reducing tee joint through the first inlet passage, and the second inlet passage is communicated with the second channel.
9. The displacement experiment device according to claim 7, wherein the outlet orifice plate is provided with a plurality of outlet passages in a circumferential direction, and each outlet passage is connected with the inner model pore passage.
10. The displacement experiment device according to claim 5, wherein the fluid switch is a diaphragm type fluid switch, the diaphragm type fluid switch is provided with a shell, and the side wall of the shell is provided with a valve closing port and a valve opening port which are connected with the steering tee joint and an outlet which can be communicated with an inner model pore canal of the displacement experiment device; the elastic diaphragm is arranged in the shell, is fixedly connected with the inner wall of the shell and divides the shell into a first cavity and a second cavity which are not communicated; the outlet and the open valve are communicated with the first chamber, and the close valve is communicated with the second chamber.
11. The displacement testing device according to claim 10, wherein the periphery of the elastic diaphragm is fixedly connected with a diaphragm ring, and the diaphragm ring is fixedly connected with the inner wall surface of the housing in a sealing manner.
12. The displacement testing device according to claim 10, wherein the shut-off port and the open-off port are disposed orthogonally to the outlet.
13. The displacement experiment device according to any one of claims 4 to 12, wherein the fluid switch is connected with the pore passage, a center line of the fluid switch is orthogonal to a center line of the inlet connecting pipe, and the fluid switch is fixedly connected with the inner model through adhesive glue.
14. The displacement experiment device according to any one of claims 4 and 6 to 9, wherein the fluid switch is connected with the pore passage, the center line of the fluid switch is parallel to the center line of the inlet connecting pipe, and the fluid switch is fixedly connected with the inner model through adhesive.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105986789A (en) * | 2015-02-11 | 2016-10-05 | 中国石油化工股份有限公司 | High-water-cut oil reservoir microscopic water-drive rest oil water kinetics characterization method |
| CN109025922A (en) * | 2018-09-05 | 2018-12-18 | 中国石油天然气股份有限公司 | Oil displacement system and method of water-gas dispersion system |
| CN109441414A (en) * | 2018-09-07 | 2019-03-08 | 中国石油化工股份有限公司 | Simulate the microcosmic oil drive experimental method and electrolyte filling method of reservoir condition |
| CN110736665A (en) * | 2019-10-16 | 2020-01-31 | 河南理工大学 | method for calculating adsorption deformation energy of coal body |
| CN114428165A (en) * | 2020-09-23 | 2022-05-03 | 中国石油化工股份有限公司 | Intermediate container and system for rock core displacement experiment |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1479634A1 (en) * | 1987-04-01 | 1989-05-15 | Татарский Государственный Научно-Исследовательский И Проектный Институт Нефтяной Промышленности | Method of studying the seepage process on formation model |
| CN101793137A (en) * | 2010-01-29 | 2010-08-04 | 西南石油大学 | Oil-water displacement efficiency experimental method of longitudinal and planar nonhomogeneous slab models |
| CN103063687A (en) * | 2013-01-06 | 2013-04-24 | 中国石油大学(华东) | Device for acquiring and testing microcosmic distribution image of remaining oil in porous medium |
| CN202947950U (en) * | 2012-11-01 | 2013-05-22 | 中国石油化工股份有限公司 | Porous medium microcosmic seepage simulation experiment device system |
| CN103216222A (en) * | 2013-04-30 | 2013-07-24 | 北京科技大学 | High temperature and high pressure visual device for simulating microorganism oil displacement and simulating method thereof |
| CN203335070U (en) * | 2013-07-09 | 2013-12-11 | 江苏华安科研仪器有限公司 | Multifunctional oil displacement physical simulation device |
-
2013
- 2013-12-25 CN CN201310727386.1A patent/CN103670391B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1479634A1 (en) * | 1987-04-01 | 1989-05-15 | Татарский Государственный Научно-Исследовательский И Проектный Институт Нефтяной Промышленности | Method of studying the seepage process on formation model |
| CN101793137A (en) * | 2010-01-29 | 2010-08-04 | 西南石油大学 | Oil-water displacement efficiency experimental method of longitudinal and planar nonhomogeneous slab models |
| CN202947950U (en) * | 2012-11-01 | 2013-05-22 | 中国石油化工股份有限公司 | Porous medium microcosmic seepage simulation experiment device system |
| CN103063687A (en) * | 2013-01-06 | 2013-04-24 | 中国石油大学(华东) | Device for acquiring and testing microcosmic distribution image of remaining oil in porous medium |
| CN103216222A (en) * | 2013-04-30 | 2013-07-24 | 北京科技大学 | High temperature and high pressure visual device for simulating microorganism oil displacement and simulating method thereof |
| CN203335070U (en) * | 2013-07-09 | 2013-12-11 | 江苏华安科研仪器有限公司 | Multifunctional oil displacement physical simulation device |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105986789A (en) * | 2015-02-11 | 2016-10-05 | 中国石油化工股份有限公司 | High-water-cut oil reservoir microscopic water-drive rest oil water kinetics characterization method |
| CN109025922A (en) * | 2018-09-05 | 2018-12-18 | 中国石油天然气股份有限公司 | Oil displacement system and method of water-gas dispersion system |
| CN109025922B (en) * | 2018-09-05 | 2021-03-09 | 中国石油天然气股份有限公司 | Oil displacement system and method of water-gas dispersion system |
| US11098569B2 (en) | 2018-09-05 | 2021-08-24 | Petrochina Company Limited | System and method of performing oil displacement by water-gas dispersion system |
| CN109441414A (en) * | 2018-09-07 | 2019-03-08 | 中国石油化工股份有限公司 | Simulate the microcosmic oil drive experimental method and electrolyte filling method of reservoir condition |
| CN109441414B (en) * | 2018-09-07 | 2021-07-16 | 中国石油化工股份有限公司 | Microcosmic oil displacement experimental method for simulating oil reservoir conditions |
| CN110736665A (en) * | 2019-10-16 | 2020-01-31 | 河南理工大学 | method for calculating adsorption deformation energy of coal body |
| CN114428165A (en) * | 2020-09-23 | 2022-05-03 | 中国石油化工股份有限公司 | Intermediate container and system for rock core displacement experiment |
| CN114428165B (en) * | 2020-09-23 | 2024-05-24 | 中国石油化工股份有限公司 | Intermediate container and system for rock core displacement experiment |
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