CN103670391A - Displacement experiment fluid control method and displacement experiment device - Google Patents
Displacement experiment fluid control method and displacement 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 a displacement experiment device. The displacement experiment fluid control method comprises the steps that saturated fluid is poured into an inner model hole channel through an inlet connecting pipe communicated with an inner model of the displacement experiment device until the saturated fluid step is finished, the displacement fluid is directly poured into the inner model hole channel through a pipeline directly communicated with the inner model to achieve the displacement step. The displacement experiment device comprises an outer model and the inner model arranged in the outer model. One end of the inner model hole channel is connected with the inlet connecting pipe which is connected with a saturated fluid conveying device, a fluid switch is arranged on the portion, close to the inlet connecting pipe, of the inner model hole channel, and a control device capable of controlling the fluid switch to be opened and closed is arranged outside the outer model. According to the displacement experiment fluid control method and the displacement experiment device, the displacement fluid can be directly conveyed to the inner model hole channel through the pouring pipeline, the displacement experiment speed is improved, and the experiment precision is improved. The displacement experiment fluid control method and the experiment device are particularly suitable for microcosmic displacement experiments.
Description
Technical field
The present invention relates to oil-gas field development experimental technique field, particularly relate to a kind of displacement test fluid control method and can realize the experimental facilities of the method.
Background technology
HTHP microscopic displacement experiment is the important means of research water drive, gas drive, chemical displacement of reservoir oil process seepage flow mechanism, utilize not only simulating oil deposit condition comparatively truly of this experiment, and can observe intuitively the seepage flow situation in oil reservoir, be conducive to sum up percolation law, for the design of oil reservoir scheme provides reliable reference.
The microcosmic inner model pore constriction yardstick using in microscopic displacement experiment is little, mostly is micron order, and the meticulous control of injecting fluid is very large for the observing effect impact of displacement test; In experiment, need to simulate high temperature and high pressure environment in reservoir simultaneously, need to use high temperature and high pressure kettle as external model, in still, narrow space makes the installation of control valve for fluids and control become very difficult.At present, the meticulous control of the fluid modes that adopt at the additional cartridge control valve of still more, which can be controlled flowing of fluid easily and effectively, yet also has certain drawback:
(1) be illustrated in figure 1 the schematic diagram that existing control valve for fluids is located at microscopic displacement experiment device, the entrance tube connector 12 that the duct 13 and of displacement test device inner model 10 extends to external model 16 outsides is connected, saturated fluid A enters described inner model 10 via this entrance tube connector 12, when saturated fluid A completes after the saturation history of microcosmic inner model 10, except the saturated fluid A in inner model 10 ducts 13, in entrance tube connector 12, also can retain a part of saturated fluid A, although entrance tube connector 12 is not very long, but owing to being microscopic displacement experiment, therefore the volume of this entrance tube connector 12 is compared considerable with the volume in inner model 10 ducts 13, when adjusting three-way diverter valve 11(, be control valve for fluids), while adopting displacement fluid B displacement saturated fluid A, need to first this part the saturated fluid A displacement in entrance tube connector 12 be entered to microcosmic inner model 10, in this process, the flow control of displacement fluid B becomes very difficult, excessive velocities, displacement fluid B can be very short by the time of inner model 10, displacement process in inner model 10 will be difficult to observation, speed is excessively slow, waits for that displacement fluid B will be very very long by the time of inner model 10, usually needs tens of minutes, even a few hours, has a strong impact on speed of experiment, has reduced operating efficiency.
(2) in displacement process, saturated fluid A residual in entrance tube connector 12 can be unclean by displacement at short notice, but can remain in for a long time on inner-walls of duct, and in displacement process, constantly be carried and enter microcosmic inner model 10, not only affect the monitoring of displacement process in microcosmic inner model 10, and affected the accuracy of experimental data.
(3) particularly when observing gas drive oil mixed phase process, injected gas can be first with entrance tube connector 12 in the raw mixed phase of fry dried food ingredients, then enter microcosmic inner model 10, this makes in microcosmic inner model 10, to be difficult to observe the mixed phase process of gas drive oil, and the further investigation of gas drive oil mixed phase process has been produced to adverse influence.
Because the defect that above-mentioned known technology exists, the inventor is according to the Production design experience of being engaged in for many years this area and association area, develop displacement test fluid control method of the present invention and experimental facilities, thereby can effectively reduce the impact of remaining fluid on microscopic displacement experiment in pipeline, improve the experimental precision of displacement process.
Summary of the invention
The object of this invention is to provide a kind of displacement test fluid control method and experimental facilities, to overcome the defect proposing in background technology.
Displacement test fluid control method of the present invention, comprising: the entrance tube connector being connected by the inner model with displacement test device injects saturated fluid in inner model duct, completes after saturated fluid step, stops the injection of saturated fluid; Pipeline by being directly connected with inner model, directly injects displacement fluid in inner model duct, carries out displacement step.
Displacement test device of the present invention, comprise: external model, be arranged at the inner model in external model, one end, duct of inner model is connected with entrance tube connector, wherein, entrance tube connector is connected with saturated fluid conveying device, near on the inner model duct of entrance tube connector, is being provided with fluid switch, and the outside of external model is provided with can control the control device that fluid switch opens and closes.
Compared with prior art, the advantage of displacement test fluid control method of the present invention and experimental facilities is:
1. displacement test fluid control method of the present invention and experimental facilities can reduce contacting of displacement fluid and the saturated fluid retaining in entrance tube connector, realize effectively controlling in real time of fluid flow path, the saturated fluid injecting in entrance tube connector while preventing in displacement process saturation process before injects inner model duct, thereby accelerated speed of experiment, improved operating efficiency.
2. the present invention is directly delivered to displacement fluid in inner model duct by flow in pipes in displacement process, not only can avoid the saturated fluid retaining in entrance tube connector, also can make the displacement Fluid Volume of injection more accurate, can reduce or eliminate that because retaining saturated fluid in entrance tube connector the observation of displacement process is had a negative impact, improve the experimental precision of micromodel displacement test.
3. displacement test fluid control method of the present invention and experimental facilities, by being arranged on the control device of external model outside, realized the accurate control of fluid flow path in fluid switch, thereby solved the Long-distance Control problem of fluid switch.
4. displacement test fluid control method of the present invention and experimental facilities are specially adapted to microscopic displacement experiment.
Accompanying drawing explanation
The following drawings is only intended to the present invention to schematically illustrate and explain, not delimit the scope of the invention.Wherein,
Fig. 1 is the schematic diagram of the displacement test device of prior art;
Fig. 2 is the schematic diagram () of an embodiment of displacement test device of the present invention;
Fig. 3 is the local enlarged diagram of tubular type fluid switch and inner model junction in Fig. 2;
Fig. 4 is the schematic diagram (two) of an embodiment of displacement test device of the present invention;
Fig. 5 is the local enlarged diagram of tubular type fluid switch and inner model junction in Fig. 4;
Fig. 6 is the combination schematic diagram of tubular type fluid switch and control device in Fig. 2;
Fig. 7 is the generalized section along C-C line in Fig. 6;
Fig. 8 is the generalized section along D-D line in Fig. 6;
Fig. 9 is the schematic diagram of another embodiment of displacement test device of the present invention;
Figure 10 is the combination schematic diagram of diaphragm-actuated fluid switch and control device in Fig. 9;
Figure 11 is the top view of diaphragm-actuated fluid switch;
Figure 12 is the decomposing schematic representation of the shell of diaphragm-actuated fluid switch;
Figure 13 is the combined top view of zona and flexible sheet;
Figure 14 is the generalized section of zona;
Figure 15 is the front elevation drawing of flexible sheet;
Figure 16 is the schematic diagram of a shift state of flexible sheet;
Figure 17 is the schematic diagram of another shift state of flexible sheet.
Critical element label declaration:
10 inner model 11 three-way diverter valve 12 entrance tube connectors
13 duct 14 saturated fluid control pump 15 displacement fluid control pumps
16 external model 17 confined pressure control system 18 adhesive glue
19 flow in pipes 20 are controlled pipeline
1 tubular type fluid control device
2 tubular type fluid switch 21 shell 22 elastic film bulks
221 openend 23 inlet hole plate 231 first entries
232 second entry 24 outlet orifice plate 241 exit passageways
25 elastic film bulk outer space
3 reducing tee 31 inner tube 32 outer tubes
33 body 34 housing 35 first passages
36 second channels
2' diaphragm-actuated fluid switch 21' shell 211' box body
212' end cap 22' flexible sheet
23' zona 24' outlet 25' opens valve port
26' closes valve port 27' first chamber 28' the second chamber
4,4' turns to threeway
5,5' control device
A saturated fluid B displacement fluid
M, M' outlet
N, N' outlet
The specific embodiment
The present invention proposes a kind of displacement test fluid control method, comprising: the entrance tube connector being connected by the inner model with displacement test device injects saturated fluid in inner model duct, completes after saturated fluid step, stops the injection of saturated fluid; Pipeline by being directly connected with inner model, directly injects displacement fluid in inner model duct, carries out displacement step.
Method of the present invention is by installing a fluid switch near on the inner model duct of entrance tube connector, and this fluid switch is arranged in the external model of inner model outside, by being arranged on the control device of external model outside, controlling the unlatching of this fluid switch or close, realizing the control of injecting or stopping injecting displacement fluid to duct.
Displacement test device provided by the invention, comprise: external model, be arranged at the inner model in external model, one end, duct of inner model is connected with entrance tube connector, wherein, entrance tube connector is connected with saturated fluid conveying device, near on the inner model duct of entrance tube connector, is being provided with fluid switch, and the outside of external model is provided with can control the control device that fluid switch opens and closes.
Wherein, control device can turn to one end of threeway to be connected with displacement fluid delivery system for turning to threeway, and the other end connects fluid switch.
In one embodiment, control device further comprises and is arranged on fluid switch and turns to the reducing tee between threeway, and reducing tee comprises a housing, one inner tube runs through housing setting, one outer tube sleeve is located at inner tube outside, forms first passage in inner tube, between outer tube and inner tube, forms second channel; On housing, be also communicated with a body, body is connected with second channel by housing; Each outer tube, inner tube, body are connected with housing seal.
Wherein, fluid switch is tubular type fluid switch, has a tubular outer shell; The two ends of shell are respectively equipped with inlet hole plate and outlet orifice plate, and inlet hole plate has the first entry and the second entry, and outlet orifice plate is provided with exit passageway; During one expansion, can close the cryptomere elastic film bulk setting of exit passageway in the enclosure, the openend of elastic film bulk is connected with the first entry of inlet hole plate.
In another specific embodiment, control device is three-way diverter valve, and one end of three-way diverter valve is connected with displacement fluid delivery system, and the other end connects fluid switch.Wherein, fluid switch is diaphragm-actuated fluid switch, and diaphragm-actuated fluid switch has a shell, and the sidewall of shell is provided with the pass valve port that turns to threeway to be connected and opens valve port and the outlet that can be connected with the inner model duct of displacement test device; One flexible sheet setting in the enclosure, and is fixedly connected with outer casing inner wall, and shell is divided into the first chamber and the second chamber not being connected; Outlet, open valve port and be connected with the first chamber, pass valve port is connected with the second chamber.
A feasible technical scheme is, fluid switch is connected with duct, the center line phase quadrature of the center line of fluid switch and entrance tube connector, and be arranged on the fluid entry port place near duct, and by bonded adhesives, be fixedly connected with between fluid switch and inner model.
Another feasible technical scheme is, fluid switch is connected with duct, the center line of fluid switch parallels with the center line of entrance tube connector, and is arranged on the fluid entry port place near duct, and by bonded adhesives, is fixedly connected with between fluid switch and inner model.
Displacement test fluid control method of the present invention and experimental facilities, by fluid switch is directly connected with inner model, can reduce or eliminate that because retaining saturated fluid in connecting pipe the observation of displacement process is had a negative impact.In addition, by the control device of external model outside, effectively control in real time the open and close of fluid switch, improved the experimental precision of displacement process.Thereby effectively to having overcome conventional control valve for fluids, can only be arranged on external model outside, make to have one section of connecting pipe between control valve and inner model, during displacement, cannot effectively prevent the defect that the remaining fluid of saturation stage enters inner model duct.
For technical characterictic of the present invention, object and effect being had more clearly, understand, below in conjunction with accompanying drawing and preferred embodiment, the specific embodiment, structure, feature and effect to displacement test fluid control method of the present invention and experimental facilities, be described in detail as follows.In addition, by the explanation of the specific embodiment, when can be to reach technological means and the effect that predetermined object takes more to be goed deep into concrete understanding to the present invention, however institute's accompanying drawing be only to provide with reference to and explanation use, be not used for the present invention to be limited.Identical parts, adopt identical label.
As shown in Fig. 2, Fig. 9, a kind of displacement test fluid control method that the present invention proposes, comprise: the entrance tube connector 12 being connected by the inner model 10 with displacement test device, to inner model duct 13 interior injection saturated fluid A, completes after saturated fluid step, stops the injection of saturated fluid A; Pipeline 19 by being directly connected with inner model 10, directly injects displacement fluid B in inner model duct 13, carries out displacement step.
Near on the inner model duct 13 of entrance tube connector 12, a fluid switch is being installed, and fluid switch is arranged in the external model 16 of inner model 10 outsides, by being arranged on the control device 5 of external model 16 outsides, controlling the unlatching of this fluid switch or close, realizing 13 controls of injecting or stopping injecting displacement fluid B to duct.
Wherein, between fluid switch and inner model 10, by bonded adhesives, be fixedly connected with.
The present invention also proposes to realize the displacement test device of above-mentioned control method.Fig. 2, Fig. 4 are the schematic diagrames of an embodiment of displacement test device of the present invention.As shown in Figure 2, in the present embodiment, the fluid switch of displacement test device is tubular type fluid switch 2, this displacement test device comprises: external model 16, be arranged at the inner model 10 in external model 16, 13 one end, duct of inner model 16 are connected with entrance tube connector 12, the other end is connected with the outlet opening of inner model 10, entrance tube connector 12 is connected with saturated fluid conveying device, saturated fluid conveying device in the present embodiment is saturated fluid control pump 14, near on inner model 10 ducts 13 of entrance tube connector 12, be provided with tubular type fluid switch 2, the outside of external model 16 is provided with can control the control device 5 that tubular type fluid switch 2 opens and closes, control device in the present embodiment comprises and turns to threeway 4 and reducing tee 3, turn to the entrance of threeway 4 to be connected with displacement fluid control pump 15, two outlets are connected with tubular type fluid switch 2 by reducing tee 3.
Fig. 2 has shown a kind of set-up mode of tubular type fluid switch 2 on inner model 10 ducts 13 in the present embodiment, Fig. 3 is the tubular type fluid switch 2 of this kind of set-up mode and the partial enlarged drawing of inner model 10 junctions, the center line of tubular type fluid switch 2 arranges with the center line phase quadrature of entrance tube connector 12, the tubular type fluid switch 2 being connected with duct 13 is fixed on the outside of inner model 10 by adhesive glue 18, this adhesive glue 18 can be selected according to the material of external model 16 interior fillings, for example, glass cement etc., the confined pressure that bonded adhesives 18 applies because being subject to confined pressure control system 17, there is good sealing performance.Concrete material this case of this adhesive glue 18 is not limited, as long as tubular type fluid switch 2 can be fixed on inner model 10 just passable.
Fig. 4 has shown the another kind of set-up mode of the tubular type fluid switch 2 in the present embodiment on inner model 10 ducts 13, Fig. 5 is the tubular type fluid switch 2 of this kind of set-up mode and the partial enlarged drawing of inner model 10 junctions, the center line of tubular type fluid switch 2 parallels setting with the center line of entrance tube connector 12, other structure is all identical with the set-up mode shown in Fig. 2, Fig. 3, therefore do not repeat.
As shown in Fig. 6, Fig. 7, Fig. 8, tubular type fluid switch 2 in the present embodiment has a tubular outer shell 21, the two ends of shell 21 are respectively equipped with inlet hole plate 23 and outlet orifice plate 24, a plurality of the second entries 232 that inlet hole plate 23 has the first entry 231 of portion located therein and edge circumferentially arranges between the first entry 231 outer walls and inlet hole plate 23 inwalls, outlet orifice plate 24 has along outlet orifice plate 24 inwalls along a plurality of exit passageways 241 that circumferentially arrange, and each exit passageway 241 is directly connected with inner model 10 ducts 13 of microscopic displacement experiment device.Wherein, the first entry 231 is a short tube, by connecting gusset, this short tube is fixedly connected with the inwall of described shell 21.Equally, the central authorities of outlet orifice plate 24 are provided with a solid circular plate body, by connecting gusset, this circle plate body are fixedly connected with the inwall of shell 21, form described exit passageway 241 between this circle plate body and shell 21.
In addition, as shown in Figure 6, in the shell 21 of tubular type fluid switch 2, be provided with a cryptomere elastic film bulk 22, this elastic film bulk 22 for example can be made by silicon rubber, there is good elasticity and resistance to pressure, after being filled with gas, can expand, the openend 221 of elastic film bulk 22 is connected with the first entry 231 of inlet hole plate 23, between elastic film bulk 22 and shell 21, forms elastic film bulk outer space 25.
In addition, refer to again Fig. 6, the reducing tee 3 of tubular type fluid switch 2 comprises the metal shell 34 of a hollow, one inner tube 31 runs through this housing 34, one end of inner tube 31 is connected with turning to the outlet M of threeway 4, the other end is connected with the first entry 231 of inlet hole plate 23, thereby forms the first passage 35 being connected with elastic film bulk 22 in inner tube 31.One outer tube 32 be set in inner tube 31 between tubular type fluid switch 2 and reducing tee 3 part outside, and extend to housing 34, between outer tube 32 and inner tube 31, form second channel 36, one end of second channel 36 is connected with housing 34, the other end is connected with the second entry 231 of inlet hole plate 23, thereby second channel 36 is further connected with the exit passageway 241 arranging on elastic film bulk outer space 25 and outlet orifice plate 24.On housing 34, be also communicated with a body 33, one end of this body 33 is connected with second channel 36 by the housing 34 of hollow, and the other end is connected with turning to the outlet N of threeway 4.Inner tube 31, outer tube 32, body 33 are tightly connected by pressure cap and housing 34 respectively.
As shown in Figure 2, Figure 4 shows, the displacement test device of the present embodiment, tubular type fluid switch 2 is connected with duct 13, and be arranged on the fluid entry port place near duct 13, in a feasible technical scheme, tubular type fluid switch 2 is connected with reducing tee 3 by a flow in pipes 19, and this flow in pipes 19 has first passage 35 identical with reducing tee 3 and that be interconnected, second channel 36.
Fig. 9 is the schematic diagram of another embodiment of displacement test device of the present invention, as shown in Figure 9, in the present embodiment, the fluid switch of displacement test device is diaphragm-actuated fluid switch 2', control device 5' is for turning to threeway 4', turn to the entrance of threeway 4' to be connected with displacement fluid control pump 15, two outlets are connected with diaphragm-actuated fluid switch 2', and other structure of the displacement test device of the present embodiment is all identical with the embodiment shown in Fig. 2, Fig. 4, therefore do not repeat.
As shown in figure 10, diaphragm-actuated fluid switch 2' in the present embodiment has a shell 21', the sidewall of shell 21' is provided with the pass valve port 26' that turns to threeway 4' to be connected and opens valve port 25' and the outlet 24' that can be connected with inner model 10 ducts 13 of displacement test device; One flexible sheet 22' is arranged in shell 21', and is fixedly connected with shell 21' inwall, and shell 21' is divided into the first chamber 27' and the second chamber 28' not being connected; Outlet 24', open valve port 25' and be connected with the first chamber 27', pass valve port 26' is connected with the second chamber 28'.This is arranged so that displacement fluid B can be by turning to the outlet M' of threeway 4' when opening valve port 25' and turning to one of threeway 4' outlet M' to be connected, and the valve port 25' that flows through out enters the first chamber 27; When pass valve port 26' is connected with another outlet N' that turns to threeway 4', displacement fluid B can be by turning to the outlet N' of threeway 4', and the pass valve port 26' that flows through enters the second chamber 28'.
In a specific embodiment, close valve port 26', open valve port 25' and the orthogonal thereto setting of outlet 24'.Outlet 24' is arranged on a sidewall of shell 21', closes valve port 26', opens on another sidewall that valve port 25' is arranged on shell 21'.
In another feasible technical scheme, close one end that valve port 26' is arranged on shell 21', outlet 24' is arranged on the other end of shell 21', opens on the sidewall that valve port 25' is arranged on shell 21'.To outlet 24', open valve port 25', the setting position this case of closing valve port 26' do not limited, as long as can realize, exports 24, opens valve port 25 and be connected with the first chamber 27, pass valve port 26 is connected with the second chamber 28.
As shown in figure 12, for the ease of assembling and maintenance, shell 21' is by there being end box body 211', and one covers the end cap 212' that is fixed on box body 211' peristome and forms.
Specifically, as shown in Figure 10, Figure 11, Figure 12, box body 211' is the hollow cylindrical metal body of one end sealing, the circular steel member made of end cap 212' for matching with cassette shapes, box body 211' is fixedly connected with the form of screw thread with end cap 212', outlet 24' is arranged on end cap 212', opening valve port 25', pass valve port 26' is arranged on the sidewall of box body 211' mutually orthogonally with outlet 24', and opening valve port 25' is all connected with the first chamber 27' with outlet 24', closing valve port 26' is connected with the second chamber 28', wherein, open valve port 25' and be metal thin tube with pass valve port 26'.
As shown in figure 11, according to an embodiment of the invention, the periphery of flexible sheet 22' is fixedly connected with a zona 23', the internal face of zona 23' and shell 21' is sealedly and fixedly connected, thereby guarantee that the first chamber 27' and the second chamber 28' have good sealing, prevent the fluid cross flow one in the first chamber 27', the second chamber 28'.
Specifically, please be simultaneously referring to Figure 10, Figure 13-Figure 15, flexible sheet 22' makes by adding fluorosioloxane rubber, make this flexible sheet 22' there is heatproof (conventional-60 ℃ to+250 ℃), resistance to oxidation, oil resistant corrosion, the feature that extensive chemical stability and mechanical strength are poor, temperature range meets oil-gas field development requirement of experiment, extensive chemical stability, there is good elasticity and resistance to pressure, can be not damaged under conventional displacement pressure, simultaneously, zona 23' is elastic caoutchouc annulus, this zona 23' is fastened in the round and elastic film body 22' outside of matching with its shape, zona 23' is fixedly connected with the internal face of shell 21' again, due to fixing of zona 23' and elastic film bulk 22', and zona 23' and shell 21' internal face be fixed as routine techniques, therefore exceed, repeat.
As shown in figure 16, because flexible sheet 22' has good elasticity and resistance to pressure, while being full of the displacement fluid B being entered by pass valve port 26' in the second chamber 28', flexible sheet 22' can be offset to the first chamber 27', thereby sealing exports 24', closes diaphragm-actuated fluid switch 2'; As shown in figure 17, if now stop, to the second chamber 28', inject displacement fluid B, then to the first chamber 27', inject displacement fluid B by opening valve port 25', now, although the second chamber 28' is sealing state, but be the process of boosting by opening the process that valve port 25' injects displacement fluid B to the first chamber 27', pressure in the first chamber 27' is during a little more than the second chamber 28', the second chamber 28' is compressed, flexible sheet 22' is oppositely offset to the second chamber 28', thereby open outlet 24', open diaphragm-actuated fluid switch 2'.
In the present embodiment, as shown in Figure 9, Figure 10, diaphragm-actuated fluid switch 2' is connected with duct 13, and be arranged on the fluid entry port place near duct 13, make in microscopic displacement experiment, when displacement fluid B enters the first chamber 27' of diaphragm-actuated fluid switch 2', and while opening the outlet 24' of diaphragm-actuated fluid switch 2', displacement fluid B can export 24' by this and directly enter coupled inner model 10 ducts 13, starts displacement saturated fluid A.
In the present embodiment, as shown in Fig. 9, Figure 16 or 17, the center line phase quadrature setting of the center line of the diaphragm-actuated fluid switch 2' being connected with duct 13 and entrance tube connector 12, diaphragm-actuated fluid switch 2' is fixed on the outside of inner model 10 by adhesive glue 18, this adhesive glue 18 can be selected according to the material of external model 16 interior fillings.The displacement test device of the present embodiment, in a feasible technical scheme, open valve port 25', the pass valve port 26' of diaphragm-actuated fluid switch 2' are connected with turning to threeway 3' by flow in pipes 19 and control pipeline 20 respectively, thereby in the process of saturated fluid, displacement fluid B can enter diaphragm-actuated fluid switch 2' by controlling pipeline 20, and outlet 24' is closed; In the process of displacement fluid, displacement fluid B can enter diaphragm-actuated fluid switch 2' by flow in pipes 19, and will export 24' unlatching, carries out displacement step.
In conjunction with above-mentioned displacement test device, further illustrate displacement test fluid control method of the present invention:
Step 1: open displacement fluid delivery system, by being arranged on the control device of external model 10 outsides, control the flow path of displacement fluid B, thus realize by be located on inner model 10 ducts 13 and with inner model 10 between the fluid switch that is fixedly connected with by adhesive glue 18 close;
Step 2: open saturated fluid conveying device, the entrance tube connector 12 being connected by the inner model 10 with displacement test device, to inner model 10 duct 13 interior injection saturated fluid A, completes after saturated fluid step, stops the injection of saturated fluid A;
Step 3: change the flow path of displacement fluid B by control device, thereby realize the unlatching of fluid switch, displacement fluid B directly injects in inner model 10 ducts 13, carries out displacement step.
For the more deep understanding that has to displacement test fluid control method of the present invention and experimental facilities, below in conjunction with first embodiment of displacement test device of the present invention, the operating principle of displacement test fluid control method of the present invention and experimental facilities is described.
Please refer to Fig. 2,6, the gas drive oil microscopic displacement experiment of take is example, and experimental procedure and workflow are as follows:
1. Preparatory work of experiment: the saturated oil sample under preparing experiment temperature, pressure condition (being saturated fluid A) and displacement gas sample (being displacement fluid B).The pipeline that connects displacement test device, is fixed on tubular type fluid switch 1 on inner model 10 ducts 13 of external model 16 inside, and will comprise reducing tee 3 and turn to the control device 5 of threeway 4 to be fixed on external model 16 outsides, and the sealing of testing pipeline.
Adjustment turns to threeway 4 that its outlet M is connected with inner tube 31, open after the valve of fluid control pump 15, displacement gas sample enters the first passage 35 in inner tube 31, through the first entry 231 being connected with first passage 35, enter elastic film bulk 22, elastic film bulk 22 constantly expands, until sealing exit passageway 241, thereby realized closing of tubular type fluid switch 1 by being arranged on the control device 5 of microcosmic external model 16 outsides.
2. saturated fluid process: the valve of opening fluid control pump 14, the entrance tube connector 12 being connected by microcosmic inner model 10 ducts 13 with displacement test device is to the saturated oil sample of the described inner model 10 interior injection in duct 13, when the most ducts 13 in inner model 10 are saturated by saturated oil sample, complete saturated fluid step, stop the injection of saturated oil sample.
3. displacement process: slowly adjust and turn to threeway 4 that its outlet N is connected with body 33 (because the yardstick in duct 13 in microcosmic inner model 10 is little, mostly be micron order, therefore need slowly to adjust and turn to threeway 4, stability with fluid in assurance system, avoid causing because the displacement time is too short displacement process to be difficult to the situation of observation) simultaneously, displacement gas sample is by turning to threeway 4 to enter body 33, and enter second channel 36 by housing 34, via the second entry 232, enter the elastic film bulk outer space 25 in tubular type fluid switch 2 again, now, although elastic film bulk 22 inner chambers and first passage 35 are sealing state, but the process of injecting displacement gas sample to elastic film bulk outer space 25 by the second entry 232 is the process of boosting, pressure in elastic film bulk outer space 25 is during a little more than elastic film bulk 22 inner chamber, elastic film bulk 22 is compressed, thereby open exit passageway 241, thereby by being arranged on the control device of external model 16 outsides, realized the unlatching of tubular type fluid switch 2.Afterwards, displacement gas sample, by the flow in pipes 19 being directly connected with inner model 10 ducts 13, directly injects in inner model 10 ducts 13, starts the saturated oil sample of displacement, can use camera record displacement process.
4. complete gas drive oil microscopic displacement experiment, carry out flow process and equipment and arrange.
Displacement test fluid control method of the present invention and experimental facilities are specially adapted to microscopic displacement experiment, displacement test fluid control method of the present invention is that fluid switch is implanted on the inner model 10 of microscopic displacement experiment device, because inner model 10 is to be placed in external model 16, for ease of installing and effectively controlling, control device 5,5' and fluid switch 2,2' is separated, soon fluid switch 2,2' are located on inner model 10, and the control device of fluid switch 5,5' are arranged on to the outside of external model 16, thereby realize the control easily and effectively of fluid switch 2,2'.Realizing on the long-range control method of fluid switch 2,2', the present invention adopts and controls fluid compression elastic membrane, as the mode of opening and closing of fault fluid switch 2,2'.In microscopic displacement experiment, use this fluid switch control method to need separately to be directly connected on the duct 13 of inner model 10 of micromodel for displacement fluid B introduces a flow in pipes 19.
Displacement test fluid control method of the present invention and experimental facilities can reduce contacting of displacement fluid B and the saturated fluid A retaining in entrance tube connector 12, realize controlling in real time effectively of fluid flow path, the saturated fluid A injecting in entrance tube connector 12 while preventing in displacement process saturation process before injects inner model 10 ducts 13.In addition, in displacement process, use displacement test fluid control method of the present invention and experimental facilities, can directly displacement fluid B be delivered in inner model 10 ducts 13 by flow in pipes 19, avoided the saturated fluid A retaining in entrance tube connector 12, make the displacement fluid B amount of injection more accurate, realize the accurate control in fluid flow path, improved observation effect and the efficiency of micromodel displacement test.
The foregoing is only the schematic specific embodiment of the present invention, not in order to limit scope of the present invention.Any those skilled in the art, not departing from equivalent variations and the modification of doing under the prerequisite of design of the present invention and principle, all should belong to the scope of protection of the invention.And it should be noted that, each ingredient of the present invention is not limited in above-mentioned overall applicability, each technical characterictic of describing in manual of the present invention can select one to adopt separately or select the multinomial use that combines according to actual needs, therefore, other combination relevant with this case inventive point and specifically application have been contained in the present invention in the nature of things.
Claims (14)
1. a displacement test fluid control method, comprising: the entrance tube connector being connected by the inner model with displacement test device injects saturated fluid in described inner model duct, completes after saturated fluid step, stops the injection of described saturated fluid; Pipeline by being directly connected with described inner model, directly injects displacement fluid in described inner model duct, carries out displacement step.
2. displacement test fluid control method as claimed in claim 1, it is characterized in that, near on the described inner model duct of described entrance tube connector, a fluid switch is being installed, and described fluid switch is arranged in the external model of described inner model outside, by being arranged on the control device of described external model outside, controlling the unlatching of this fluid switch or close, realizing the control of injecting or stopping injecting described displacement fluid to described duct.
3. displacement test fluid control method as claimed in claim 1 or 2, is characterized in that, between described fluid switch and described inner model, by bonded adhesives, is fixedly connected with.
4. a displacement test device, comprise: external model, be arranged at the inner model in described external model, one end, duct of described inner model is connected with entrance tube connector, it is characterized in that, described entrance tube connector is connected with saturated fluid conveying device, near on the described inner model duct of described entrance tube connector, is being provided with fluid switch, and the outside of described external model is provided with can control the control device that described fluid switch opens and closes.
5. displacement test device as claimed in claim 4, is characterized in that, described control device is for turning to threeway, described in turn to one end of threeway to be connected with displacement fluid delivery system, the other end connects described fluid switch.
6. displacement test device as claimed in claim 5, it is characterized in that, described control device further comprise be arranged on described fluid switch and described in turn to the reducing tee between threeway, described reducing tee comprises a housing, one inner tube runs through described housing setting, it is outside that one outer tube sleeve is located at described inner tube, in described inner tube, forms first passage, between described outer tube and inner tube, forms second channel; On described housing, be also communicated with a body, described body is connected with described second channel by described housing; Described in each, outer tube, inner tube, body are connected with described housing seal.
7. displacement test device as claimed in claim 6, is characterized in that, described fluid switch is tubular type fluid switch, has a tubular outer shell; The two ends of described shell are respectively equipped with inlet hole plate and outlet orifice plate, and described inlet hole plate has the first entry and the second entry, and described outlet orifice plate is provided with exit passageway; The cryptomere elastic film bulk that can close described exit passageway during one expansion is arranged in described shell, and the openend of described elastic film bulk is connected with the first entry of described inlet hole plate.
8. displacement test device as claimed in claim 7, is characterized in that, described the first entry is arranged on the middle part of described inlet hole plate, and between described the first entry and inlet hole plate inwall, edge is circumferentially with a plurality of described the second entries; Described elastic film bulk is connected with the first passage of described reducing tee by described the first entry, and described the second entry is connected with described second channel.
9. displacement test device as claimed in claim 7, is characterized in that, described outlet orifice plate is provided with a plurality of described exit passageways at circumferencial direction, and described in each, exit passageway connects described inner model duct.
10. displacement test device as claimed in claim 5, it is characterized in that, described fluid switch is diaphragm-actuated fluid switch, described diaphragm-actuated fluid switch has a shell, the sidewall of described shell is provided with described and turns to the pass valve port that threeway is connected and open valve port and the outlet that can be connected with the inner model duct of displacement test device; One flexible sheet is arranged in described shell, and is fixedly connected with described outer casing inner wall, and described shell is divided into the first chamber and the second chamber not being connected; Described outlet, open valve port and be connected with described the first chamber, described pass valve port is connected with described the second chamber.
11. displacement test devices as claimed in claim 10, is characterized in that, the periphery of described flexible sheet is fixedly connected with a zona, and the internal face of described zona and described shell is sealedly and fixedly connected.
12. displacement test devices as claimed in claim 10, is characterized in that, described pass valve port, open valve port and the orthogonal thereto setting of described outlet.
13. displacement test devices as described in claim 4 to 12 any one, it is characterized in that, described fluid switch is connected with described duct, the center line phase quadrature of the center line of described fluid switch and described entrance tube connector, and by bonded adhesives, be fixedly connected with between described fluid switch and described inner model.
14. displacement test devices as described in claim 4,6 to 9 any one, it is characterized in that, described fluid switch is connected with described duct, the center line of described fluid switch parallels with the center line of described entrance tube connector, and by bonded adhesives, is fixedly connected with between described fluid switch and described inner model.
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