CN210442363U

CN210442363U - Multifunctional rock core displacement experimental device

Info

Publication number: CN210442363U
Application number: CN201920865749.0U
Authority: CN
Inventors: 乐平; 贾冰懿; 雷涛; 任广磊
Original assignee: Southwest Petroleum University
Current assignee: Southwest Petroleum University
Priority date: 2019-06-11
Filing date: 2019-06-11
Publication date: 2020-05-01
Anticipated expiration: 2029-06-11

Abstract

The utility model discloses a multi-functional rock core displacement experimental apparatus, include: a filter, a heater, a valve system, a core holder, etc. The filtering device comprises an impurity filter, a flow meter and a pressure meter. Heating device includes back shape heating rod and agitating unit, and agitating unit links to each other with outside agitator motor, and heating box wall thickness is great, has good heat preservation effect, and back shape heating rod heating area is big, can shorten heating latency greatly. The core holder is connected with a liquid outlet of the heating box and is respectively connected with the confining pressure sensor and the confining pressure pump; the utility model provides high displacement fluid's stability just can carry out extra heating and stirring to displacement fluid, and impurity filter can filter impurity, prevents that displacement fluid from forming the sediment. The valve system comprises three valves, and through different valve switch combinations, the displacement direction of the rock core can be changed to satisfy the requirements of different experiments.

Description

Multifunctional rock core displacement experimental device

Technical Field

The utility model relates to a rock core displacement experimental apparatus, in particular to can change multi-functional rock core displacement experimental apparatus of displacement direction.

Background

The core displacement experiment refers to various oil displacement physical simulation experiments performed by using oil layer cores or artificial cores in a laboratory. However, the existing experimental instruments generally have only one function, and cannot realize various experiments, such as carrying out researches on rock core permeability measurement, formation damage evaluation (rock core sensitivity) and the like under the conditions of simulated formation pressure and formation temperature, which can increase the cost of the experiments and bring much inconvenience. Involve heating device among the rock core displacement experimental apparatus, ordinary heating cabinet is because of heating element one side or both sides in the box, and incasement air does not circulate, leads to being close to heating element position temperature height, deviating from the inhomogeneous phenomenon of temperature that heating element position temperature is low and takes place, and the constant temperature effect is very unsatisfactory, and these factors directly influence the accuracy of experimental result.

In some displacement experiments, the fluid displacement direction needs to be frequently changed, the conversion process of the forward and reverse displacement of the conventional core displacement device is very complicated, the pipeline needs to be reconnected frequently, and the working efficiency is low. The utility model overcomes this shortcoming can realize fluidic forward and reverse displacement conversion fast, has improved work efficiency greatly.

SUMMERY OF THE UTILITY MODEL

The utility model provides a displacement liquid influences the displacement effect because of forming the sediment some in the rock core displacement experimentation that exists among the prior art, the inhomogeneous very loaded down with trivial details problem of conversion process who influences experiment precision and positive reverse displacement of heating box internal heating temperature.

In order to overcome these problems and the shortcoming that exist at present, the utility model provides a can change multi-functional rock core displacement experimental apparatus of displacement direction, it includes: a filter, a heater, a valve system, a core holder, etc.

Wherein the filtering device comprises an impurity filter, a flow meter and a pressure gauge. The impurity filter is connected with the heating box through a pipeline, and the flowmeter and the pressure gauge are arranged on the pipeline between the filter and the liquid inlet of the heating box;

the heating device is a box body with a square heating rod, a stirring device is arranged at the top of the box body, and the stirring device comprises a stirring motor fixed on the outer side of the box body, and a stirring blade and a stirring shaft which are arranged in the box body;

the core holder is connected with a liquid outlet of the heating box through a pipeline, a core rubber sleeve and a rubber sleeve end plug are arranged in the core holder and used for fixedly mounting a core sample, the core holder is connected with a confining pressure pump through a hydraulic port, and the other side of the core holder is connected with a confining pressure sensor;

the valve system is provided with three valves and different pipelines, the flow meters are installed at the tail ends of the positive displacement and the negative displacement, and the displacement direction can be changed through different valve switch combinations.

Further, the heating box is also provided with a stirrer and a stirring motor for driving the stirrer.

Further, the stirrer consists of a stirring blade and a stirring shaft.

Further, an illuminating lamp and a thermometer are further arranged in the heating box.

Further, the bottom of the heating box is provided with a clip-shaped heating rod.

Further, a liquid pressurizing pump is arranged between the heating box and the valve system.

Furthermore, a hydraulic port is arranged on one side of the core holder and is connected with the confining pressure pump.

Furthermore, a pressure gauge is arranged on a pipeline between the impurity filter and the liquid inlet of the heating box.

Further, different switch combinations of the valves can change the displacement direction of the core.

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

one of them, heating cabinet bottom are provided with back shape heating rod, have increased heating area, shorten heat time greatly, and the agitator can stir incasement displacement liquid moreover to it is even to make displacement liquid be heated. The inner wall of the heating box is thick, so that the heating box has a good heat preservation effect, the temperature condition in the rock core displacement experiment can be accurately controlled, and the simulation experiment result is more accurate.

And secondly, a hydraulic port is formed in one side of the core holder and connected with a confining pressure pump, so that the actual formation pressure can be simulated, and the experimental error is reduced.

Thirdly, the direction of displacement can be changed through different valve switch combinations, the problem that the conversion process of displacement of other devices is very complicated is solved, and the working efficiency is greatly improved.

Drawings

Fig. 1 shows a multifunctional rock core displacement experimental device capable of changing displacement direction of the utility model;

FIG. 2, a schematic view of a heating rod in a serpentine shape;

FIG. 3 is a view showing the inside structure of the heating chamber;

reference numbers in the figures:

the device comprises an impurity filter 1, a pressure gauge 2, a liquid flow meter 3, a heating box 4, a lighting lamp 5, a thermometer 6, a clip heating rod 7, a stirring blade 8, a stirring motor 9, a liquid pressure pump 10, a first valve/1, a second valve 12, a third valve 13, a core holder 14, a confining pressure pump 15, a hydraulic port 16, a confining pressure sensor 17, a flow meter 18, a stirring shaft 19, a heating box liquid inlet 20 and a heating box liquid outlet 21.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1, the utility model provides a multi-functional rock core displacement experimental apparatus, it includes: a filter device 1, a heating device 4, a valve system (11, 12, 13), a core holder 14, etc.

Wherein, filter equipment includes impurity filter 1, pressure gauge 2 and fluidflowmeter 3, fluidflowmeter 3 sets up on the pipeline between filter 1 and heating cabinet 4, still installs pressure gauge 2 on the pipeline between filter 1 and the heating cabinet 4. The heating cabinet 4 is provided with a clip-shaped heating rod 7, the inner wall surface of the heating cabinet 4 is provided with a lighting lamp 5 and a thermometer 6, the top of the heating cabinet 4 is also provided with a stirring blade 8, and the stirring blade 8 is connected with a stirring motor 9 outside the heating cabinet 4 through a stirring shaft 19. The heating function of heating cabinet 4 is particularly useful for some experimental processes that need accurate control filling fluid temperature, and stirring leaf 8 is favorable to the displacement fluid to be heated evenly and prevents that some chemical displacement fluid from forming the sediment. A liquid pressurizing pump 10 is arranged between the heating box 4 and the valve system, and the rock core can be displaced only by applying certain pressure on the displacement liquid.

As shown in fig. 2 and 3, the heating box 4 is a box body with the heating rod 7 in a shape of a circle, and the heating rod 7 in a shape of a circle is positioned at the bottom of the heating box 4, so that the heating area is large, and the heating time can be greatly shortened. Be equipped with agitating unit in the box, agitating unit is including fixing stirring motor 9 in the box outside, setting up in stirring leaf 8 and the (mixing) shaft 19 of box inside, 4 incasement of heating cabinet still are provided with light 5 and thermometer 6. The stirring device can stir the displacement liquid in the heating box, so that the temperature in the heating box is uniform.

The mode of realizing changing the displacement direction is as follows: and during forward displacement, starting the confining pressure pump 15, adding a certain confining pressure to the rock core, closing the first valve 11 and the third valve 13, and opening the second valve 12, so that a forward displacement experiment can be performed. If reverse displacement is needed, the second valve 12 is closed and the first valve 11 and the third valve 13 are opened, and then the reverse displacement experiment can be carried out.

Claims

1. The utility model provides a multi-functional rock core displacement experimental apparatus which characterized in that includes: the device comprises a filtering device, a heating device, a valve system and a rock core holder;

wherein the filtering device comprises an impurity filter, a flow meter and a pressure meter; the impurity filter is connected with the heating device through a pipeline, and the flowmeter and the pressure gauge are arranged on the pipeline between the impurity filter and the heating device; the heating device is a box body with a square heating rod, a stirring device is arranged in the box body, and the stirring device comprises a stirring motor fixed on the outer side of the box body, and a stirring blade and a stirring shaft which are arranged in the box body; the core holder is connected with a confining pressure pump through a hydraulic port and used for applying circumferential pressure to the core holder, the core holder is also connected with a confining pressure sensor, and the confining pressure sensor is used for measuring the pressure of a core in the core holder; the valve system is provided with three valves and different pipelines, the flow meters are installed at the tail ends of the positive displacement and the negative displacement, and the displacement direction can be changed through different valve switch combinations.

2. The multifunctional core displacement experiment device as claimed in claim 1, wherein the heating device is a box with a heating rod in a shape of a square-circle, and a stirring blade and a motor for driving the stirring blade are further arranged at the top of the box.

3. The multifunctional core displacement experiment device as recited in claim 1, wherein the heating rod is located at a bottom of the heating box.

4. The multifunctional core displacement experiment device as claimed in claim 2, wherein an illumination lamp and a thermometer are further arranged inside the box body.

5. The multifunctional core displacement experimental facility as claimed in claim 1, wherein the valve system comprises three valves, and the displacement direction can be changed by different valve switch combinations.

6. The multifunctional core displacement experiment device as claimed in claim 1, wherein a liquid pressure pump is arranged between a box body of the heating device and the valve system.