CN215931866U - Rock core displacement experimental apparatus - Google Patents

Abstract

The utility model discloses a rock core displacement experiment device which comprises a bottom plate, wherein a plurality of displacement tanks are fixed in the middle of the upper surface of the bottom plate, a plurality of oil storage tanks are arranged on the upper surface of the bottom plate close to the displacement tanks, top covers are arranged at the top ends of the displacement tanks, annular supporting plates are arranged inside the displacement tanks, rock core samples are arranged at the top ends of the annular supporting plates, first connecting pipes are connected with the top covers and the top ends of the corresponding oil storage tanks, and a plurality of water injection pipes are arranged on one side, far away from the oil storage tanks, of the upper surface of the bottom plate. According to the utility model, the bottom plate, the plurality of displacement tanks, the plurality of oil storage tanks, the plurality of water injection pipes, the plurality of motors, the piston and the push-pull rod are arranged, so that a plurality of groups of experiments can be simultaneously carried out by using the same core sample and different motor rotating speeds to realize different water injection speeds, then the oil outlet effects at different water injection speeds are observed in the oil storage tanks, the comparison of experiment results can be more visually seen, the operation is more flexible and convenient, and the experiment cost is reduced.

Description

Rock core displacement experimental apparatus

Technical Field

The utility model relates to the technical field of oilfield development experiments, in particular to a rock core displacement experimental device.

Background

The core displacement experiment is to extract oil from the core by using the principle of water displacement, so the core flow experiment is one of the most important basic analysis items in the oil field development laboratory, is used for evaluating the damage of the working fluid to the reservoir and the fluid performance, the accuracy of the test result directly influences the development effect of the oil field, in the displacement experiment process, the oil flows along the inner hole channel wall of the core, the oil left on the channel wall is mainly moved in the way after the water invades the channel to displace the oil, the flow is also called surface seepage, and therefore the oil displacement speed is a key factor for changing the oil yield in the experiment.

However, the existing rock core displacement experiment device is complex in structure and high in device cost, so that only one group of experiments can be performed at a time, the result data of the experiments are recorded, the data are compared, and the oil displacement effect under the influence of different factors cannot be visually seen.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the defects in the prior art and provides a rock core displacement experimental device.

In order to achieve the purpose, the utility model adopts the following technical scheme: the utility model provides a rock core displacement experimental apparatus, includes the bottom plate, bottom plate upper surface middle part is fixed with a plurality of displacement jars, the bottom plate upper surface is close to a plurality of displacement jar departments and is equipped with a plurality of oil storage tanks, and is a plurality of displacement tank top all is equipped with the top cap, and is a plurality of the inside annular support plate that all is equipped with of displacement jar, the annular support plate top is equipped with the rock core sample, the top cap all is connected with first connecting pipe with corresponding oil storage tank top, one side that the oil storage tank was kept away from to the bottom plate upper surface is equipped with a plurality of water injection pipes, and is a plurality of all be connected with the second connecting pipe between water injection pipe and a plurality of displacement jar, and is a plurality of the water injection pipe top all is connected with the third connecting pipe, and is a plurality of the inside piston that all is equipped with of water injection pipe, piston surface cover has the sealing washer, the bottom plate upper surface is close to a plurality of water injection pipe departments and is equipped with a plurality of motors.

Further, the top cap inside wall and displacement jar top lateral wall all are equipped with the screw thread, the top cap passes through the screw thread rotation with the displacement jar and is connected, the top cap is equipped with the rubber circle with the displacement jar junction.

Further, a plurality of the inner side walls of the displacement tanks are provided with annular rubber pads, and the side walls of the core samples are tightly attached to the annular rubber pads.

Furthermore, a plurality of ejector rods are fixed on the inner top wall of the top cover, and the bottom ends of the ejector rods are attached to the top end of the core sample.

Furthermore, a first one-way valve and a second one-way valve are respectively arranged in the middle of the second connecting pipe and the middle of the third connecting pipe, and one end, far away from the water injection pipe, of the third connecting pipe is communicated with an external water source.

Further, piston lateral wall fixedly connected with connecting block, the connecting block rotates and is connected with the push-and-pull rod, and is a plurality of the bar mouth has all been seted up to one side that the water injection pipe is close to the push-and-pull rod, and is a plurality of the equal fixedly connected with pivot of motor drive end, the one end fixedly connected with disc of motor is kept away from in the pivot, the one end that the connecting block was kept away from to the push-and-pull rod passes the bar mouth and is connected with disc lateral wall edge rotation.

The utility model has the beneficial effects that:

when the device is used, the bottom plate, the plurality of displacement tanks, the plurality of oil storage tanks, the plurality of water injection pipes, the plurality of motors, the piston and the push-pull rod are arranged, the same core sample is placed in the plurality of displacement tanks during an experiment, then the rotating speeds of the plurality of motors are changed, so that the moving speeds of the piston and the push-pull rod are changed, the water injection speed into the displacement tanks is further changed, and finally the oil outlet effect can be directly seen in different oil storage tanks, so that the simultaneous comparison of a plurality of groups of experiments is realized, the experiment result is more visual, and the experiment cost is reduced. In addition, the same core sample and the same motor rotating speed can be used for changing other factors for carrying out experiments, the test range is wider, and the experiments are more flexible.

Drawings

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a main sectional view of the present invention;

fig. 3 is a top view of the present invention.

Illustration of the drawings:

1. a base plate; 2. a displacement tank; 3. a fuel storage tank; 4. a top cover; 5. an annular support plate; 6. a core sample; 7. an annular rubber pad; 8. a top rod; 9. a first connecting pipe; 10. a water injection pipe; 11. a second connecting pipe; 12. a third connecting pipe; 13. a first check valve; 14. a second one-way valve; 15. a piston; 16. connecting blocks; 17. a push-pull rod; 18. a strip-shaped opening; 19. a motor; 20. a rotating shaft; 21. a disc; 22. and (5) sealing rings.

Detailed Description

Fig. 1 to 3 show, relate to a rock core displacement experimental apparatus, including bottom plate 1, 1 upper surface middle part of bottom plate is fixed with a plurality of displacement jars 2, 1 upper surface of bottom plate is close to a plurality of displacement jars 2 department and is equipped with a plurality of oil storage tank 3, a plurality of 2 tops of displacement jar all are equipped with top cap 4, a plurality of 2 inside annular support plate 5 that all are equipped with of displacement jar, 5 tops of annular support plate are equipped with rock core sample 6, top cap 4 all is connected with first connecting pipe 9 with corresponding 3 tops of oil storage tank, one side that oil storage tank 3 was kept away from to 1 upper surface of bottom plate is equipped with a plurality of water injection pipes 10, all be connected with second connecting pipe 11 between a plurality of water injection pipes 10 and a plurality of displacement jar 2, a plurality of 10 tops of water injection pipes all are connected with third connecting pipe 12, a plurality of inside piston 15 that all is equipped with of water injection pipe 10, 15 surface cover has sealing washer 22, 1 upper surface is close to a plurality of water injection pipes 10 departments of bottom plate and is equipped with a plurality of motors 19.

When the rock core displacement experimental device is used, a plurality of same rock core samples 6 are firstly immersed in prepared oil, then the immersed rock core samples 6 are respectively placed into a plurality of displacement tanks 2, then the top cover 4 is screwed down, then a plurality of third connecting pipes 12 are externally connected with the same water source, finally a plurality of motors 19 are started to rotate, the rotating speeds of the plurality of motors 19 are all different, the motors 19 drive the disc 21 to rotate, so that one end of the push-pull rod 17 is driven to do circular motion, the other end of the push-pull rod 17 drives the piston 15 to do reciprocating motion in the water injection pipe 10, therefore, water is sucked into the water injection pipe 10 through the third connecting pipes 12, then the water is sent into the bottom end of the displacement tank 2 through the second connecting pipes 11, the water in the displacement tank 2 continuously rises, passes through the middle part of the annular supporting plate 5 and then passes through the interior of the rock core samples 6, the oil in the rock core samples 6 is pushed to the top end of the displacement tank 2 and then enters the oil storage tank 3 through the first connecting pipe 9, the oil outlet effect of the motor 19 at different rotational speeds after different water injection speeds can be observed at this time.

In the further scheme, 4 inside walls of top cap and 2 top lateral walls of displacement jar all are equipped with the screw thread, and top cap 4 passes through the screw thread rotation with displacement jar 2 and is connected, and top cap 4 is equipped with the rubber circle with 2 junctions of displacement jar for sealing connection between top cap 4 and the displacement jar 2, water and oil spill over from 2 tops of displacement jar when preventing the displacement of reservoir oil.

In the further scheme, 2 inside walls of a plurality of displacement jars all are equipped with annular rubber pad 7, and 6 lateral walls of core sample closely laminate with annular rubber pad 7, increase the leakproofness between core sample 6 and the displacement jar 2 for the water of 2 bottoms of displacement jar must reach the 2 tops of displacement jar through 6 insides of core sample.

In the further scheme, the roof is fixed with a plurality of ejector pins 8 in the top cap 4, and the 8 bottoms of a plurality of ejector pins are laminated with 6 tops of core sample, and are fixed with core sample 6, prevent that core sample 6 from moving up under the promotion of water.

In a further scheme, a first one-way valve 13 and a second one-way valve 14 are respectively arranged in the middle of the second connecting pipe 11 and the middle of the third connecting pipe 12, one end, far away from the water injection pipe 10, of the third connecting pipe 12 is communicated with an external water source, so that water can only enter the water injection pipe 10 from the third connecting pipe 12 and then enters the displacement tank 2 through the second connecting pipe 11.

In the further scheme, piston 15 lateral wall fixedly connected with connecting block 16, connecting block 16 rotates and is connected with push-and-pull rod 17, bar mouth 18 has all been seted up to one side that a plurality of water injection pipes 10 are close to push-and-pull rod 17, the equal fixedly connected with pivot 20 of a plurality of motor 19 drive ends, motor 19's one end fixedly connected with disc 21 is kept away from to pivot 20, the one end that connecting block 16 was kept away from to push-and-pull rod 17 passes bar mouth 18 and disc 21 lateral wall edge and rotates and be connected, rotation through motor 19 can drive piston 15 reciprocating motion in water injection pipe 10.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (6)

1. The utility model provides a core displacement experimental apparatus, includes bottom plate (1), its characterized in that: the device is characterized in that a plurality of displacement tanks (2) are fixed in the middle of the upper surface of the base plate (1), a plurality of oil storage tanks (3) are arranged at positions, close to the plurality of displacement tanks (2), of the upper surface of the base plate (1), a top cover (4) is arranged at the top ends of the plurality of displacement tanks (2), annular supporting plates (5) are arranged inside the plurality of displacement tanks (2), core samples (6) are arranged at the top ends of the annular supporting plates (5), first connecting pipes (9) are connected with the top ends of the top covers (4) and the corresponding oil storage tanks (3), a plurality of water injection pipes (10) are arranged on one side, far away from the oil storage tanks (3), of the upper surface of the base plate (1), second connecting pipes (11) are connected between the plurality of water injection pipes (10) and the plurality of displacement tanks (2), third connecting pipes (12) are connected with the top ends of the plurality of water injection pipes (10), and pistons (15) are arranged inside the plurality of water injection pipes (10), the surface of the piston (15) is sleeved with a sealing ring (22), and a plurality of motors (19) are arranged on the upper surface of the bottom plate (1) close to the plurality of water injection pipes (10).

2. The core displacement experimental apparatus of claim 1, wherein: top cap (4) inside wall and displacement jar (2) top lateral wall all are equipped with the screw thread, top cap (4) are connected through the screw thread rotation with displacement jar (2), top cap (4) and displacement jar (2) junction are equipped with the rubber circle.

3. The core displacement experimental apparatus of claim 1, wherein: a plurality of the inner side walls of the displacement tanks (2) are provided with annular rubber pads (7), and the side walls of the core samples (6) are tightly attached to the annular rubber pads (7).

4. The core displacement experimental apparatus of claim 1, wherein: roof is fixed with a plurality of ejector pins (8) in top cap (4), and is a plurality of ejector pin (8) bottom and core sample (6) top laminating.

5. The core displacement experimental apparatus of claim 1, wherein: and the middle part of the second connecting pipe (11) and the middle part of the third connecting pipe (12) are respectively provided with a first one-way valve (13) and a second one-way valve (14), and one end of the third connecting pipe (12) far away from the water injection pipe (10) is communicated with an external water source.

6. The core displacement experimental apparatus of claim 1, wherein: piston (15) lateral wall fixedly connected with connecting block (16), connecting block (16) are rotated and are connected with push-and-pull rod (17), and are a plurality of bar mouth (18) have all been seted up to one side that water injection pipe (10) are close to push-and-pull rod (17), and are a plurality of equal fixedly connected with pivot (20) of motor (19) drive end, one end fixedly connected with disc (21) of motor (19) are kept away from in pivot (20), the one end that connecting block (16) were kept away from in push-and-pull rod (17) is passed bar mouth (18) and is connected with disc (21) lateral wall edge rotation.

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