CN106769769B - Rock pressurization imbibition device - Google Patents

Abstract

The invention relates to a rock pressurized imbibition device, which is characterized in that: it comprises a pressurizing device, a water supply system, a base and a casing arranged on the base; The oil pump on the seat, the oil pump is connected to a plurality of hydraulic oil cylinders arranged at intervals on the two ends of the casing and on the side wall through pipelines, each of the hydraulic oil cylinders is provided with a push rod, located on the side of the casing The hydraulic oil cylinder on the wall is connected to the annular claw for fixing the columnar rock column through the push rod, the annular claw is arranged inside the casing, the The hydraulic oil cylinders are respectively connected to the pressing plates used for fixing the two ends of the columnar rock through the push rods; the water supply system includes an imbibition net and a plurality of water inlet pipes, and the inner walls of the annular claws and the pressing plate are respectively connected with the water inlet pipes. The ends are connected, and the imbibition net is arranged on the inner side of the ring-oriented minions.

Description

A rock pressurized imbibition device

technical field

The invention relates to a rock pressure imbibition device.

Background technique

Imbibition is a process in which a porous medium spontaneously absorbs a wetting phase fluid while displacing a non-wetting phase fluid. In recent years, due to the increasing demand for energy and the decrease in recoverable reserves of conventional oil and gas resources, one of the main targets for exploitation in the future is low-permeability oil reservoirs. There are fracture systems in low-permeability reservoirs. Due to imbibition, water can replace and displace the crude oil in the matrix blocks into the fracture system. It can be said that imbibition determines the productivity of such reservoirs. Therefore, in the experiment The formation imbibition under simulated formation conditions in the laboratory is of great guiding significance for improving the oil recovery of low permeability reservoirs.

The test conditions of the current imbibition dynamic measurement device are usually normal pressure, and it is difficult to change the stress in all directions. However, for actual reservoirs, since the capillary pressure-dominated imbibition flooding environment is a high-pressure environment, the capillary pressure will change in different directions. Therefore, the results obtained by these imbibition dynamic measurement devices cannot truly reflect the actual reservoir. imbibition dynamics.

SUMMARY OF THE INVENTION

In view of the above problems, the object of the present invention is to provide a rock pressurized imbibition device capable of applying variable pressure to the rock in the circumferential and axial directions.

In order to achieve the above purpose, the present invention adopts the following technical solutions: a rock pressurized imbibition device, characterized in that: it includes a pressurization device, a water supply system, a base and a casing arranged on the base; the The pressurizing device includes an oil pump arranged on the base, and the oil pump is connected to a plurality of hydraulic oil cylinders arranged on the two ends of the casing and on the side wall at intervals through pipelines, and each of the hydraulic oil cylinders is provided with a plurality of hydraulic oil cylinders. a push rod, through which the hydraulic oil cylinder located on the side wall of the casing is connected to an annular claw for fixing the columnar rock column, and the annular claw is arranged inside the casing, The hydraulic oil cylinders located at both ends of the casing are respectively connected to the pressing plates used for fixing the two ends of the columnar rock through the push rods; the water supply system includes an imbibition net and a plurality of water inlet pipes, the annular claws and the The inner walls of the pressing plates are respectively connected with the ends of the water inlet pipes, and the imbibition nets are arranged on the inner side of the annular claws.

The number of the annular claws is four, which are distributed in the front, rear, left and right directions of the inner side of the housing, and each annular claws are in the shape of an arc; The claws are fastened to the hydraulic cylinders located on the corresponding side walls of the housing through the push rods.

The casing is arranged in a square shape, and the number of the hydraulic oil cylinders located on the side walls around the casing is equal to one or more.

A drain pipe is provided at the bottom of the annular claw.

The beginning end of each of the water inlet pipes is connected with a water tank, and the water tank is arranged above the hydraulic oil cylinder at the top of the casing.

The number of the hydraulic cylinders located at the top and bottom ends of the housing is equal.

The number of the hydraulic cylinders located at the top and bottom ends of the housing is one or more.

A flow meter and a water valve are arranged at intervals on each of the water inlet pipes.

The base includes a platform, the oil pump and the housing are fastened to the top of the platform, and a support leg is provided at the bottom of the platform.

The present invention has the following advantages due to the adoption of the above technical solutions: 1. The present invention is provided with a pressurizing device, and the pressurizing device includes a plurality of hydraulic oil cylinders arranged at intervals on both ends of the housing and on the side walls, which can quickly adjust different materials The rock can be pressurized in the circumferential and axial directions, and the pressure can be adjusted at the same time. The present invention has a simple structure and is convenient to use. 2. The present invention is provided with annular claws. The number of annular claws is four, which are distributed in the front, rear, left, and right directions on the inside of the shell. The hydraulic cylinders on the corresponding side walls of the casing are tightly connected, the casing is set in a square shape, and the number of hydraulic cylinders on each side wall of the casing is equal to one or more, which can ensure the uniform circumferential synchronization of the rock. Under pressure, the present invention has good stability. 3. The hydraulic oil cylinders located at both ends of the shell of the present invention are respectively connected to the pressure plates used to fix the two ends of the columnar rock through push rods. At the same time, the number of hydraulic oil cylinders located at the top and bottom ends of the shell is equal, which can be one or more. It ensures that the rock is pressed evenly and synchronously in the axial direction, which further improves the stability of the device. 4. In the present invention, a flow meter and a water valve are arranged at intervals on each water inlet pipe. The flow meter can quickly and accurately detect the water supply system, and the water valve can control the water supply volume and flow rate at different positions of the columnar rock. 5. The water tank of the present invention is arranged above the hydraulic oil cylinder at the top of the casing, and can supply water by the self-weight of the water, which is convenient to use.

Description of drawings

Fig. 1 is the three-dimensional structure schematic diagram of the present invention

Figure 2 is a schematic sectional view of the present invention

Fig. 3 is the structural schematic diagram of the water supply system of the present invention

Fig. 4 is the structural representation of the imbibition net of the present invention

Detailed ways

The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

As shown in FIGS. 1 to 3 , the rock pressurized imbibition device proposed by the present invention includes a pressurization device 1 , a water supply system 2 , a base 3 and a casing 4 arranged on the base 3 . The pressurizing device 1 includes an oil pump 11 arranged on the base 3. The oil pump 11 is connected to a plurality of hydraulic oil cylinders 12 arranged at intervals on both ends of the casing 4 and on the side walls through pipelines (not shown in the figure). A push rod 121 is provided on each of the oil cylinders 12 . The hydraulic cylinder 12 located on the side wall of the casing 4 is connected to the annular claw 13 for fixing the column of the columnar rock 5 through the push rod 121 . to pressure. The hydraulic cylinders 12 at both ends of the housing 4 are respectively connected to the pressing plates 14 for fixing the two ends of the columnar rock 5 through push rods 121 , so that the columnar rock 5 can be axially compressed. The water supply system 2 includes an imbibition net 21 (as shown in FIG. 4 ) and a plurality of water inlet pipes 22 . The inner walls of the annular teeth 13 and the pressing plate 14 are respectively connected with the ends of the water inlet pipe 22 . The imbibition net 21 is provided inside the annular claw 13 , and can supply water to the columnar rock 5 through the gaps of the imbibition net 23 .

In the above-mentioned embodiment, the number of the annular claws 13 is four, which are distributed in the front, rear, left and right directions on the inside of the housing 4, and each annular claws 13 are arc-shaped and can be fully buckled. Combined on the outer wall of the columnar rock 5 cylinder. Each annular claw 13 is fastened to the hydraulic cylinder 12 located on the corresponding side wall of the housing 4 through a push rod 121 .

In the above embodiment, the casing 4 can be set in a square shape, and the number of hydraulic cylinders 12 located on each side wall of the casing 4 is equal to one or more, which can ensure that the rock 4 is pressed evenly and synchronously in the circumferential direction.

In the above embodiment, a drain pipe 23 is provided at the bottom of the annular claw 13 for draining the water that is not absorbed by the columnar rock 5 .

In the above embodiment, the beginning end of each water inlet pipe 22 is connected to the water tank 24 . The water tank 24 is provided above the hydraulic cylinder 12 at the top end of the housing 4, and can supply water by its own weight.

In the above embodiment, the number of hydraulic cylinders 12 located at the top and bottom ends of the housing 4 is equal, which can be one or more, which can ensure that the rock 4 is axially and evenly compressed.

In the above-mentioned embodiment, as shown in FIG. 3 , a flow meter 25 and a water valve 26 are arranged at intervals on each water inlet pipe 22. The flow meter 25 can quickly and accurately detect the water supply system 2, and the water valve 26 can control the cylindrical shape. Water supply volume and flow rate at different positions of rock 5.

In the above embodiment, as shown in FIGS. 1 and 2 , the base 3 includes a platform 31 , the oil pump 11 and the housing 4 are fastened to the top of the platform 31 , and a support leg 32 is provided at the bottom of the platform 31 .

As shown in Figures 1 and 2, when the present invention is used, each hydraulic cylinder 12 is controlled by the oil pump 11, and the annular tooth claws 13 are opened by the hydraulic cylinders 12 located on the side walls around the casing 4, and the columnar rock 5 is put into In the cavity of the housing 4 , each hydraulic cylinder 12 is then pressurized, so that the circumferential and axial forces of the columnar rock 5 can be simultaneously applied. At the same time, each hydraulic cylinder 12 can be used to adjust the pressure of the columnar rock 5 in various directions to meet the experimental requirements. After the pressure is applied, the columnar rock 5 is supplied with water in all directions through the water valve 26, and at the same time, the water consumption is detected by the flow meter 25, so as to detect the water imbibition ability of the columnar rock 5 under pressure (as shown in FIG. 3). .

The above-mentioned embodiments are only used to illustrate the present invention, and the structure and connection mode of each component can be changed to some extent. outside the scope of protection of the invention.

Claims (7)

1. The utility model provides a rock pressurization imbibition device which characterized in that: the device comprises a pressurizing device, a water supply system, a base and a shell arranged on the base; the pressurizing device comprises an oil pump arranged on the base, the oil pump is connected with a plurality of hydraulic oil cylinders arranged at intervals on two ends and side walls of the shell through pipelines, each hydraulic oil cylinder is provided with a push rod, the hydraulic oil cylinders on the side walls of the shell are connected with annular tooth claws used for fixing a columnar rock cylinder through the push rods, the annular tooth claws are arranged in the shell, and the hydraulic oil cylinders on two ends of the shell are respectively connected with pressing plates used for fixing two ends of the columnar rock through the push rods; the water supply system comprises an infiltration and suction net and a plurality of water inlet pipes, the inner walls of the annular claw and the pressure plate are respectively connected with the tail ends of the water inlet pipes, and the infiltration and suction net is arranged on the inner side of the annular claw teeth; a drain pipe is arranged at the bottom of the annular tooth claw;

the number of the annular tooth claws is four, the annular tooth claws are distributed in four directions of the front, the rear, the left and the right of the inner side of the shell, and each annular tooth claw is in an arc shape; each annular tooth claw is fixedly connected with the hydraulic oil cylinder on the side wall of the corresponding side of the shell through the push rod.

2. The pressurized imbibition device of rock of claim 1, wherein: the shell is arranged in a square shape, and the number of the hydraulic oil cylinders on the peripheral side walls of the shell is respectively equal and is one or more.

3. The pressurized imbibition device of rock of claim 1, wherein: the starting end of each water inlet pipe is connected with a water tank, and the water tank is arranged above the hydraulic oil cylinder at the top end of the shell.

4. The pressurized imbibition device of rock of claim 1, wherein: the number of the hydraulic oil cylinders positioned at the top end and the bottom end of the shell is equal.

5. The pressurized imbibition device of claim 4, wherein: the number of the hydraulic oil cylinders positioned at the top end and the bottom end of the shell is one or more.

6. The pressurized imbibition device of rock of claim 1, wherein: each water inlet pipe is provided with a flowmeter and a water valve at intervals.

7. The pressurized imbibition device of rock of claim 1, wherein: the base includes the platform, the oil pump with the equal fastening connection of casing is in the top of platform the bottom of platform is provided with the supporting leg post.

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