CN217542767U

CN217542767U - Imbibition bottle sealing device for spontaneous imbibition displacement of reservoir oil experiment of rock core

Info

Publication number: CN217542767U
Application number: CN202220914233.2U
Authority: CN
Inventors: 刘安邦; 张磊; 贺沛; 肖沛瑶; 杨康; 王锰; 田伟伟; 杜锦; 许伟; 王超
Original assignee: Shaanxi Yanchang Petroleum Group Co Ltd
Current assignee: Shaanxi Yanchang Petroleum Group Co Ltd
Priority date: 2022-04-20
Filing date: 2022-04-20
Publication date: 2022-10-04
Anticipated expiration: 2032-04-20

Abstract

The utility model relates to an oil gas field development field, in particular to spontaneous imbibition displacement of reservoir oil experiment of rock core is with imbibition bottle sealing device. An imbibition bottle sealing device for spontaneous imbibition oil displacement experiments of rock cores comprises a container table and a telescopic supporting rod movably connected with the bottom of the container table; the container is provided with a plastic ring, the inner side of the plastic ring is provided with a whole-circumference fixing groove, the cross section of the fixing groove is rectangular, and an inflatable air bag is arranged in the fixing groove; the inflation and deflation device is connected with the inflation and inflation air bag; the inflation and deflation device comprises an inflation pump and an exhaust pump, an outlet pipeline of the inflation pump and an inlet pipeline of the exhaust pump are both connected with the inflation and inflation air bag, and control valves are arranged on the outlet pipeline of the inflation pump and the inlet pipeline of the exhaust pump. The utility model discloses can give the instrument and link up the long-term effectual sealed effect in position.

Description

Sealing device of suction bottle for spontaneous core suction oil displacement experiment

Technical Field

The utility model relates to an oil gas field development field, in particular to spontaneous imbibition displacement of reservoir oil experiment of rock core is with imbibition bottle sealing device.

Background

At present, spontaneous imbibition oil production is a common development means for low-permeability reservoirs. The porous medium spontaneous imbibition uses capillary force as power, and the hypotonic oil reservoir has compact pores and obvious capillary force, so that the imbibition power is sufficient, the effect is obvious, the recovery ratio of the hypotonic oil reservoir can be obviously improved, and the method has a great significance for improving the yield of oil and gas fields. Therefore, it is necessary to develop an indoor spontaneous imbibition experiment, which provides reference for researchers to know the imbibition mechanism and explore the influence effect of different factors on the imbibition effect, thereby improving the oil and gas recovery rate. The pore throat volume of the core of the low permeability reservoir used in the experiment is small, so that the oil-water displacement volume in the imbibition process is small, how to accurately measure the volume of the oil displaced by the imbibition is very critical for calculating the imbibition recovery ratio.

At present, many methods are used to calculate the imbibition recovery ratio, and one of the methods is to measure the volume of the displaced oil by using an experimental device to calculate the imbibition recovery ratio. The traditional experimental device is a seepage bottle which is formed by connecting a glass capillary tube with scales and a bottle-shaped glass container with a rock core. The device mainly reflects the imbibition efficiency by recording the volume change of oil floating to the upper part of the capillary tube. In the experimental process, the saturated standard cylindrical rock core is vertically placed in the imbibition bottle, imbibition liquid (usually water or liquid added with chemical agent) is slowly added into the imbibition bottle, and the liquid level is ensured to be below the 0 scale mark of the imbibition bottle.

Because the glass capillary tube at the upper part and the glass container at the lower part have no special connection design, the glass capillary tube is only simply pressed into the bottle mouth of the glass container and cannot form tight sealing of the bottle mouth by means of elastic deformation of the glass capillary tube, and the effect of pressing, plugging and sealing is achieved. During long-term experiments, seepage and imbibition inevitably overflow through the joint part under the action of gravity. This results in an inability to accurately gauge the volume of oil displaced in the bottle using the imbibition bottle, thereby resulting in a significant error in the imbibition recovery ratio calculated using this data.

To avoid this problem, a sealing process must be performed at the splice. In the prior art, an experimenter usually applies a large amount of grease substances such as vaseline and butter to the joint of a glass capillary tube and a glass container to eliminate joint gaps before filling the imbibing liquid into the imbibing bottle, so as to avoid the imbibing liquid in the bottle from overflowing. However, the properties of materials such as vaseline and the like used in the seepage-proofing method are greatly influenced by temperature, the materials are gradually melted under the condition of higher ambient temperature, and the spontaneous seepage experiment period is usually longer, so that the problem that sealing grease at a joint is gradually reduced and viscous and runs off after the experiment is carried out for a period of time is often caused, the joint gap is exposed in different degrees, the sealing of the joint is lost, seepage and seepage overflow are caused, and the experiment result has larger errors.

Although the problem that the gap at the joint is exposed in the experimental process can be solved to a certain extent by arranging a method that experimenters regularly check the sealing condition of the joint and fill up sealing grease at the weak part of the seal, the method greatly increases the workload of the experimenters, and the conditions that the glass capillary is inclined to leak liquid and even falls off due to improper operation of the experimenters in the smearing process occur, so that the smooth operation of the experiment is seriously influenced.

Disclosure of Invention

In order to overcome above-mentioned prior art not enough, the utility model provides a spontaneous imbibition displacement of reservoir oil of rock core is infiltration suction bottle sealing device for experiments to can't carry out long-term effective sealed problem to infiltration suction bottle linking department when carrying out spontaneous imbibition laboratory test in the solution.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

an imbibition bottle sealing device for a core spontaneous imbibition oil displacement experiment comprises a container table and a telescopic supporting rod movably connected with the bottom of the container table; the container table is provided with a plastic ring, the inner side of the plastic ring is provided with a whole circumference fixing groove, the section of the fixing groove is rectangular, and an inflatable air bag is arranged in the fixing groove; the inflation and deflation device is connected with the inflation and expansion air bag; the inflation and deflation device comprises an inflation pump and an exhaust pump, an outlet pipeline of the inflation pump and an inlet pipeline of the exhaust pump are both connected with the inflation and inflation air bag, and control valves are arranged on the outlet pipeline of the inflation pump and the inlet pipeline of the exhaust pump.

The bottom of the container table is uniformly provided with 4 spherical holes at intervals of 90 degrees, and the axes of the spherical holes are vertical to the bottom surface of the container table; the number of the telescopic supporting rods is 4, and the telescopic supporting rods comprise spherical joints, nitrogen hydraulic cylinders and stroke rods which are sequentially connected; the spherical joint is pressed into the spherical hole.

The side wall of the container table is provided with an air hole, the side wall of the air charging and discharging device is provided with an air tap, and the air tap is connected with the air hole through a connecting hose; the three-way joint is positioned in the air charging and discharging device; one end of the three-way joint is connected to an outlet pipeline of the air pump, one end of the three-way joint is connected to an inlet pipeline of the exhaust pump, and the other end of the three-way joint is connected to the air tap.

The connecting hose is a PVC hose, one end of the PVC hose is provided with a 4-part internal thread threaded connector, the other end of the PVC hose is provided with a 4-part external thread threaded connector, the 4-part internal thread threaded connector is connected to the air faucet, and the 4-part external thread threaded connector is connected to the air hole.

And an inlet control valve is arranged on an outlet pipeline of the inflating pump, and an outlet control valve is arranged on an inlet pipeline of the exhaust pump.

The bottom of the travel rod is provided with an anti-skidding foot pad.

Except the side wall provided with the air tap, the other inner walls of the air charging and discharging device are provided with heat dissipation seams.

And plastic support legs for supporting are arranged at the four corners of the bottom surface of the air charging and discharging device.

The surface of the inflatable air bag is provided with an anticorrosive coating to prevent corrosive liquid from corroding.

The bottom surface of the container table is provided with a groove for accommodating the telescopic supporting rod.

Compared with the prior art, the utility model discloses following technological effect has:

(A) In the aspect of advancement, in the experimental process, the inflatable expansion air bag is always in an inflatable state, and the material of the inflatable expansion air bag is soft and can be tightly attached to a connecting gap, so that the utility model can provide a long-term effective sealing effect for the connecting part of an instrument, and has no problems of uneven sealing degree caused by uneven oil coating and exposed connecting gap caused by oil dripping;

(B) In the aspect of operability, the utility model is simple to operate and is easier to realize compared with the traditional operation of coating grease by spending a large amount of time; the method is different from the traditional method that the regular inspection is needed and the grease is filled in the weak part, so that the workload of experimenters is greatly reduced;

(C) In the aspect of economic rationality, various materials used for manufacturing the utility model are generally applied in life and are easy to obtain, so the production cost is low. Although the unit price of the utility model is slightly higher than that of a barrel of industrial vaseline or other petroleum grease, the utility model can be repeatedly used and has long service life; in the prior art, a large amount of vaseline grease needs to be coated before the experiment begins, and the experiment process needs to be coated and filled for multiple times, so that a large amount of sealing grease needs to be consumed when the experiment is carried out once, vaseline or other petroleum grease needs to be purchased irregularly, the cost is far higher than that of a device, and the device has more economic rationality;

(D) In the aspect of reliability, the utility model has the advantages of reasonable scheme, simple structure and easy realization of various functions; the used materials, devices, technologies and the like are mature at present, and basically no fault occurs under the condition of correct use, so the utility model has the advantages of strong reliability, low fault rate and simple daily maintenance;

(E) In the aspect of the suitability, the lower part glass container that probably uses different internal diameters when considering to carry out different imbibition experiments does not adopt rigidity modes such as welding to connect collection dress platform and flexible bracing piece when the design, but adopts this kind of flexible mode of ball joint to connect, lets 4 flexible bracing pieces can rotate the size in order to adapt to different glass containers wantonly, has richened the utility model discloses an use the sight, consequently the utility model discloses very strong suitability has.

Drawings

Fig. 1 is a main view of the utility model (the air bag is in an inflated state).

Fig. 2 is a plan view of the wire rack (the airbag is in an inflated state) of the present invention.

Fig. 3 is a working principle diagram of the present invention.

Reference numerals are as follows: wherein: 1. a packaging platform; 2. fixing grooves; 3. inflating and expanding the air bag; 4. a spherical pore; 5. a ball joint; 6. a nitrogen hydraulic cylinder; 7. a trip lever; 8. anti-skid foot pads; 9. air holes; 10. a connecting hose; 11. an air charging and discharging device; 12. heat dissipation seams; 13. plastic support legs; 14. a groove; 15. an air tap; 16. an intake control valve; 17. an inflator pump; 19. a three-way joint; 20. an exhaust pump; 22. an air outlet control valve.

Detailed Description

Example 1

An imbibition bottle sealing device for a spontaneous imbibition oil displacement experiment of a rock core comprises a container table 1 and a telescopic supporting rod movably connected with the bottom of the container table 1; the container table 1 is provided with a plastic ring, the inner side of the plastic ring is provided with a whole circumference fixing groove 2, the section of the fixing groove 2 is rectangular, and an inflatable air bag 3 is arranged in the fixing groove 2; the inflating and deflating device 11 is connected with the inflating and inflating air bag 3; the inflation and deflation device 11 comprises an inflator pump 17 and an exhaust pump 20, an outlet pipeline of the inflator pump 17 and an inlet pipeline of the exhaust pump 20 are both connected with the inflatable airbag 3, and control valves are arranged on the outlet pipeline of the inflator pump 17 and the inlet pipeline of the exhaust pump 20.

Example 2

On the basis of the embodiment 1, the method further comprises the following steps:

the bottom of the container table 1 is uniformly provided with 4 spherical holes 4 at intervals of 90 degrees, and the axes of the spherical holes 4 are vertical to the bottom surface of the container table 1; the number of the telescopic supporting rods is 4, and the telescopic supporting rods comprise spherical joints 5, nitrogen hydraulic cylinders 6 and stroke rods 7 which are connected in sequence; the ball joint 5 is pressed into the ball hole 4.

Example 3

On the basis of embodiment 2, the method further comprises the following steps:

the side wall of the container table 1 is provided with an air hole 9, the side wall of the air charging and discharging device 11 is provided with an air nozzle 15, and the air nozzle 15 is connected with the air hole 9 through a connecting hose 10; the three-way joint 19 is positioned inside the inflation and deflation device 11; the three-way joint 19 has one end connected to the outlet pipeline of the inflator 17, one end connected to the inlet pipeline of the exhaust pump 20, and the other end connected to the air nozzle 15.

The connecting hose 10 is a PVC hose with one end provided with a 4-minute internal thread threaded connector and the other end provided with a 4-minute external thread threaded connector, and the 4-minute internal thread threaded connector is connected to the

air tap

15,4 minute external thread threaded connector and is connected to the air hole 9.

Example 4

On the basis of embodiment 3, the method further comprises the following steps:

an inlet control valve 16 is arranged on an outlet pipeline of the inflator 17, and an outlet control valve 22 is arranged on an inlet pipeline of the exhaust pump 20. The bottom end of the travel rod 7 is provided with an anti-skidding foot pad 8. Except the side wall provided with the air tap 15, the other inner walls of the air charging and discharging device 11 are provided with heat dissipation seams 12. The plastic support legs 13 for supporting are arranged at the four corners of the bottom surface of the air charging and discharging device 11, so that air flowing and heat dissipation and ventilation enhancement are facilitated. And an anticorrosive layer is arranged on the surface of the inflatable air bag 3. A groove 14 for accommodating the telescopic supporting rod is arranged below the bottom surface of the container table 1.

The inflatable air bag 3 is made of a polyurethane film with the thickness of 3mm, has the characteristics of high tensile strength, excellent flexibility and abrasion resistance, has excellent inflatable sealing effect and is not easy to break or lose efficacy; the surface of the inflatable air bag 3 is provided with an anticorrosive coating to prevent the corrosion of corrosive liquid. For convenience, the inflatable air bag 3 is set to a vivid cyan color.

Wherein the stretching limit of the telescopic supporting rod is 20cm; the telescopic supporting rod is connected with the spherical hole 4 of the container platform 1 through the spherical joint 5, and the spherical joint 5 has the characteristics of rotating at any angle around the axis and bending in any direction, so that the direction and the angle of the 4 spherical joints 5 are adjusted, the telescopic supporting rod can form a surrounding structure for the bottom glass containers of the imbibition bottles with different inner diameters, and the application range of the device is greatly enlarged. The nitrogen hydraulic cylinder 6 and the stroke rod 7 are made of stainless steel materials and are not easy to rust; the pipe diameter and the rod diameter are thicker and are respectively 18mm and 8mm, and the supporting capacity is strong; the wall thickness is also thicker, namely 3mm and 1.4mm, so that the novel LED lamp is more durable; the nitrogen injected into the nitrogen hydraulic cylinder 6 plays a role in protection and is not easy to rust; the stroke rod 7 and the nitrogen hydraulic cylinder 6 adopt hydraulic oil seals, so that the service life is long, and the sealing effect is good. Anti-skidding foot pad 8 is connected with stroke pole 7 through the bifurcate joint, is made by the plastic, and a large amount of textures have been carved with to the bottom surface, both can play the effect that prevents flexible bracing piece and slide, also can reduce flexible bracing piece and to the loss of laboratory bench mesa, simultaneously also the noise reduction. When not in use, the telescopic supporting rod is retracted and then pressed into the groove 14 on the bottom surface of the packaging platform 1, so that the packaging platform is convenient to place and carry.

The plastic ring in the container table 1 is annular, the inner side of the annular is provided with a whole-circumference fixing groove 2, the inner diameter of the annular is 80mm, the outer diameter of the annular is 130mm, and the edge thickness of the annular is 5mm; the connecting hose 10 is used for guiding gas, and has a pipe diameter of 12mm and a length of 540mm; when not in use, the connecting hose 10 can be detached to facilitate the placement of the pallet 1 and the inflation and deflation device 11.

The utility model discloses a concrete working process does:

(1) After an experimental core is placed in the imbibition bottle and imbibition filling is completed, firstly, the position of the container table 1 is adjusted, so that the joint of a capillary glass tube and a glass container in the middle of the imbibition bottle is positioned in the center of a circular area surrounded by the inflatable expansion air bag 3; then the angle of the spherical joint 5 and the stretching length of the stroke rod 7 are adjusted according to the height of the joint, so that the middle part of the inflatable expansion air bag 3 and the joint of the imbibition bottle are basically at the same height;

(2) Electrifying the inflation and deflation device 11, opening an outlet pipeline of the inflator 17 and arranging an air inlet control valve 16, enabling the air outlet control valve 22 to be in a closed state, and preparing the inflation and deflation device 11 for inflating the inflatable air bag 3;

(3) The inflator 17 inflates the gas into the inflatable air bag 3; the inflator 17 pumps gas from the outside, the gas enters the three-way joint 19 through the gas inlet control valve 16, and the gas can only enter the inflatable air bag 3 through the gas nozzle 15, the connecting hose 10 and the gas hole 9 in sequence due to the closing of the gas outlet control valve 22, so that the inflatable air bag 3 begins to expand;

(4) Inflating for a period of time, after the inflatable expansion air bag 3 entirely surrounds the middle part of the imbibition bottle and is tightly attached to the joint gap, controlling the inflator pump 17 to stop working, closing the air inlet control valve 16 and stopping inflating; the pipeline from the inflatable air bag 3 to the position between the air inlet control valve 16 and the air outlet control valve 22 is a closed system, and the inflated air is completely closed in the pipeline and can not flow, so that the inflatable air bag 3 can be continuously kept to be inflated, and long-term sealing of a joint gap is realized; therefore, if the sealing of the inflatable expansion air bag 3 to the joint gap is not influenced under the condition of power failure, the situation that the spontaneous imbibition experiment period is long and power failure is possibly encountered during the spontaneous imbibition experiment period is well met, and the requirement of effective sealing can be kept under the situation;

(5) After the experiment is finished, the air outlet control valve 22 is opened, the air inlet control valve 16 is still closed, and the air charging and discharging device 11 is ready for air discharging of the inflatable air bag 3; the air pump 20 pumps air from the inflatable air bag 3, and the inflatable air bag 3 starts to contract, thereby gradually releasing the surrounding of the imbibition bottle. The gas in the inflatable air bag 3 sequentially passes through the air hole 9, the connecting hose 10, the air nozzle 15 and the air outlet control valve 22 and then enters the exhaust pump 20, and the exhausted gas enters the outside through the air outlet;

(6) When the inflatable air bag 3 contracts to be close to the initial state of recovery, the air outlet control valve 22 is closed, and the exhaust pump 20 stops working;

(7) The charging and discharging device 11 is powered off to prevent the occurrence of accidental safety accidents.

Claims

1. An imbibition bottle sealing device for spontaneous imbibition oil displacement experiments of rock cores comprises a container table (1) and a telescopic supporting rod movably connected with the bottom of the container table (1); the method is characterized in that: the container platform (1) is provided with a plastic ring, the inner side of the plastic ring is provided with a whole-circumference fixing groove (2), the cross section of the fixing groove (2) is rectangular, and an inflatable air bag (3) is arranged in the fixing groove (2); the inflatable air bag further comprises an inflation and deflation device (11) connected with the inflatable air bag (3); the inflation and deflation device (11) comprises an inflator pump (17) and an exhaust pump (20), an outlet pipeline of the inflator pump (17) and an inlet pipeline of the exhaust pump (20) are both connected with the inflation expansion airbag (3), and control valves are arranged on the outlet pipeline of the inflator pump (17) and the inlet pipeline of the exhaust pump (20).

2. The seepage bottle sealing device for the spontaneous core seepage flooding experiment according to claim 1, which is characterized in that: the bottom of the packaging table (1) is uniformly provided with 4 spherical holes (4) at intervals of 90 degrees, and the axes of the spherical holes (4) are vertical to the bottom surface of the packaging table (1); the number of the telescopic supporting rods is 4, and the telescopic supporting rods comprise spherical joints (5), nitrogen hydraulic cylinders (6) and stroke rods (7) which are connected in sequence; the spherical joint (5) is pressed into the spherical hole (4).

3. The seepage bottle sealing device for the spontaneous core seepage flooding experiment as claimed in claim 2, wherein: an air hole (9) is formed in the side wall of the container table (1), an air nozzle (15) is formed in the side wall of the air charging and discharging device (11), and the air nozzle (15) is connected with the air hole (9) through a connecting hose (10); the air charging and discharging device also comprises a three-way joint (19) positioned in the air charging and discharging device (11); one end of the three-way joint (19) is connected to an outlet pipeline of the inflator pump (17), one end of the three-way joint is connected to an inlet pipeline of the exhaust pump (20), and the other end of the three-way joint is connected to the air tap (15).

4. The core spontaneous imbibition displacement experimental imbibition bottle sealing device as claimed in claim 3, characterized in that: the connecting hose (10) is a PVC hose, one end of the PVC hose is provided with an internal thread nipple of 4 minutes, the other end of the PVC hose is provided with an external thread nipple of 4 minutes, the internal thread nipple of 4 minutes is connected to the air faucet (15), and the external thread nipple of 4 minutes is connected to the air hole (9).

5. The core spontaneous imbibition displacement experimental imbibition bottle sealing device as claimed in claim 4, characterized in that: an air inlet control valve (16) is arranged on an outlet pipeline of the inflator pump (17), and an air outlet control valve (22) is arranged on an inlet pipeline of the exhaust pump (20).

6. The seepage bottle sealing device for the spontaneous core seepage flooding experiment according to claim 5, characterized in that: the bottom end of the stroke rod (7) is provided with an anti-skidding foot pad (8).

7. The seepage bottle sealing device for the spontaneous core seepage flooding experiment as claimed in claim 6, wherein: the air charging and discharging device (11) is provided with heat dissipation seams (12) on the other inner walls except the side wall provided with the air nozzle (15).

8. The core spontaneous imbibition displacement experimental imbibition bottle sealing device as claimed in claim 7, characterized in that: and plastic support legs (13) for supporting are arranged at the four corners of the bottom surface of the air inflation and deflation device (11).

9. The sealing device for the spontaneous imbibition displacement experimental imbibition bottle for the rock core according to claim 8, is characterized in that: the surface of the inflatable air bag (3) is provided with an anticorrosive layer.

10. The seepage bottle sealing device for the spontaneous core seepage flooding experiment of claim 9 is characterized in that: a groove (14) for accommodating the telescopic supporting rod is arranged below the bottom surface of the container table (1).