CN211900563U - Rock core displacement experimental apparatus - Google Patents

Abstract

The utility model discloses a rock core displacement experimental device, which comprises a water storage tank, a displacement pump, an intermediate container, a rock core holder and a measuring cylinder which are connected in sequence, wherein the intermediate container and the rock core holder are both arranged in a constant temperature box, and the rock core holder is connected with a confining pressure pump; the measuring cylinder is arranged on the weighing equipment, the intermediate container is divided into a displacement liquid chamber and a water chamber by a piston, the displacement liquid chamber is connected with the core holder, the water chamber is connected with the displacement pump, the water storage tank comprises a lower water tank, an upper water tank is arranged above the lower water tank, the upper water tank and the lower water tank are both arranged on the support, a drain pipe is further arranged on the lower water tank, metering scales are arranged on the scale hose, a drain branch pipe is further arranged on the scale hose, and the displacement pump is connected with the lower water tank. The utility model discloses a set up upper water tank, lower water tank and scale hose, used displacement liquid's volume when can the accurate measurement displacement, through set up stopper and displacement liquid delivery pipe on middle container, can discharge displacement liquid in the displacement liquid cavity completely after having guaranteed the experiment.

Description

Rock core displacement experimental apparatus

Technical Field

The utility model relates to an oil field experimental facilities technical field, concretely relates to rock core displacement experimental apparatus.

Background

In the development process of petroleum and natural gas, an indoor core displacement experiment is the most basic work, and the metering of the displacement fluid is an important part in the displacement experiment. For a long time, the core displacement fluid is mainly measured by a glass tube or a measuring cylinder which is arranged at the tail end of a core holder and is provided with scales, but the core displacement fluid can only measure the volume of displacement output fluid which is an outlet end, and the volume of the displacement fluid used in the displacement can not be calculated. For example, chinese patent CN 208383669U discloses a rock core displacement experimental apparatus, which adopts a measuring cylinder and a weighing device as a metering device for displacement fluid, but the displacement time is generally long, and needs to last for several days, and simultaneously, the displacement is performed indoors, the temperature is relatively high, and part of the displacement fluid falling into the measuring tube in the experimental process evaporates, which causes inaccurate measurement, and seriously affects the evaluation of the experimental displacement fluid.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a measure accurate rock core displacement experimental apparatus.

In order to achieve the above object, the present invention provides the following technical solutions: the utility model provides a rock core displacement experimental apparatus, is including storage water tank, displacement pump, middle container, rock core holder and the graduated flask that connects gradually, the thermostated container is all located to middle container and rock core holder, middle container is separated for displacement fluid cavity and water cavity by the piston, the rock core holder is connected to the displacement fluid cavity, the displacement pump is connected to the water cavity, the storage water tank includes lower water tank, lower water tank top is equipped with the upper water tank, lower water tank and upper water tank are connected by the scale hose, be equipped with the measurement scale on the scale hose, still be equipped with the drainage branch pipe on the scale hose, water tank under the displacement pump connection.

Furthermore, a limiting block is arranged in the middle container, and the piston is arranged above the limiting block. And the middle container is also provided with a displacement liquid discharge pipe, the displacement liquid discharge pipe is arranged above the limiting block, and the distance between the displacement liquid discharge pipe and the limiting block is equal to the thickness of the piston.

Furthermore, a displacement fluid inlet pipe and an exhaust pipe are further arranged above the displacement fluid chamber. And the displacement fluid inlet pipe is connected with a displacement fluid box.

The measuring cylinder is arranged on the weighing equipment, and a windshield is arranged around the weighing equipment.

The utility model has the advantages as follows:

(1) through setting up upper water tank, lower water tank and scale hose, used displacement fluid's volume when having measured displacement accurately, the output of measuring displacement fluid is assisted with the graduated flask simultaneously at the rock core holder end, and the volume of judgement displacement fluid that both combine to be can be more accurate.

(2) Through set up stopper and displacement fluid delivery pipe on middle container, guaranteed to discharge displacement fluid in the displacement fluid cavity completely after the experiment, avoided the problem that displacement fluid is difficult to discharge in conventional rock core displacement experimental apparatus's the displacement fluid cavity.

Drawings

FIG. 1 is a schematic view of the whole structure of the present invention;

FIG. 2 is a schematic view of a scale hose connection;

FIG. 3 is a schematic view of an intermediate container structure;

in the figure, a lower water tank 1, a bracket 2, an upper water tank 3, a displacement pump 4, an intermediate container 5, a displacement liquid tank 6, a core holder 7, a measuring cylinder 8, a weighing device 9, a windshield 10, a confining pressure pump 11, a graduated hose 12, a thermostat 13 and a drainage branch pipe 14 are arranged;

a 51 water chamber, a 52 displacement fluid chamber, a 53 limiting block, a 54 piston, a 55 water inlet hole, a 56 displacement fluid outlet, a 57 displacement fluid discharge pipe, a 58 exhaust pipe, and a 59 displacement fluid inlet pipe.

Detailed Description

In order to clearly understand the technical features, objects and advantages of the present invention, the following detailed description is given to the technical solution of the present invention, but the technical solution of the present invention is not limited to the limit of the implementable range of the present invention.

A rock core displacement experiment device comprises a water storage tank, a displacement pump 4, an intermediate container 5, a rock core holder 7 and a measuring cylinder 8 which are sequentially connected, wherein the intermediate container 5 and the rock core holder 7 are both arranged in a constant temperature box 13, and the rock core holder 7 is connected with a confining pressure pump 11; the measuring cylinder 8 is arranged on the weighing device 9, and the windshield 10 is arranged around the weighing device 9; the intermediate container 5 is divided into a displacement liquid chamber 52 and a water chamber 51 by a piston 54, wherein the displacement liquid chamber 52 has a volume larger than 500ml, or displacement liquid chambers 52 with different sizes can be manufactured according to different requirements, the displacement liquid chamber 52 is connected with the core holder 7 through a displacement liquid outlet 56, the water chamber 51 is connected with the displacement pump 4 through a water inlet 55, the water storage tank comprises a lower water tank 1, an upper water tank 3 is arranged above the lower water tank 1, the upper water tank 3 and the lower water tank 1 are both arranged on the bracket 2, in particular, in order to prevent the inaccurate measurement result caused by bubbles in the water storage tank, in the embodiment, the lower water tank 1 is set as a dome water tank, the upper water tank 3 is set as a round bottom water tank, a drain pipe is further arranged on the lower water tank 1, a scale hose 12 is connected with the highest point of the lower water tank 1 and the lowest point of the upper water tank 3, the precision is 0.1ml, a calibration hose 12 with longer length and larger measuring range can be adopted, a drainage branch pipe 14 is also arranged on the calibration hose 12, and the displacement pump 4 is connected with the lower water tank 1.

Be equipped with stopper 53 in the middle container 5, its outside is equipped with displacement fluid delivery pipe 57, and piston 54 locates the stopper 53 top, and displacement fluid delivery pipe 57 locates the stopper 53 top, and the distance between the two equals the thickness of piston 54, and such design has guaranteed to pass through the displacement fluid delivery pipe and empty completely with remaining displacement fluid in the middle container 5. A displacement fluid inlet pipe 59 and an exhaust pipe 58 are further arranged above the displacement fluid chamber 52, the displacement fluid inlet pipe 59 is connected with the displacement fluid tank 6, when the displacement fluid tank 6 adds displacement fluid into the displacement fluid chamber 52, the exhaust pipe 58 ensures that air in the displacement fluid chamber 52 can be completely emptied, and air in the displacement fluid chamber 52 is prevented from entering the experiment core during an experiment.

It should be noted that the shapes of the lower water tank 1 and the upper water tank 3 are not limitations of the present invention, and other shapes such as a cone shape and a water tank capable of avoiding forming a large amount of bubbles all belong to the protection scope of the present invention.

It should be noted that, in order to better fill the lower water tank 1 with water, the lower water tank 1 may be provided with a vent hole, or other conventional means which is advantageous for filling water may be adopted.

The utility model also comprises a conventional valve which is not listed but should be present on each pipeline.

The utility model discloses during the use, fill displacement liquid in displacement liquid cavity 52, add water through header tank 3, the surface of water exceeds header tank 3, wherein exceed the volume that the part is not less than water cavity 51, start displacement pump 4, the liquid level of adjusting the storage water tank through locating drainage branch pipe 14 is located scale hose 12, can confirm the consumption of displacement liquid according to the volume that the liquid level descends in scale hose 12 in the experimentation, the liquid measure that can also collect with graduated flask 8 simultaneously is as the reference. After the experiment is finished, the water in the water storage tank, the water chamber 51 and the pipeline is discharged through the water discharge pipe arranged on the lower water tank 1, and the displacement fluid in the displacement fluid chamber 52 is discharged through the displacement fluid discharge pipe 57.

The above embodiments have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, which are only illustrative and not restrictive, and those skilled in the art can flexibly change the experimental conditions, the analysis method and the objects within the scope not exceeding the gist of the present invention, and all of them fall within the scope of the present invention.

Claims (9)

1. The utility model provides a rock core displacement experimental apparatus, is including storage water tank, displacement pump, middle container, rock core holder and the graduated flask that connects gradually, middle container is separated for displacement fluid cavity and water cavity by the piston, the rock core holder is connected to the displacement fluid cavity, the displacement pump is connected to the water cavity, a serial communication port, the storage water tank includes lower water tank, lower water tank top is equipped with the upper water tank, lower water tank and upper water tank are by the scale hose connection, the lower water tank is connected to the displacement pump.

2. The core displacement experiment device as claimed in claim 1, wherein a limiting block is arranged in the intermediate container, and the piston is arranged above the limiting block.

3. The core displacement experiment device as claimed in claim 2, wherein the intermediate container is further provided with a displacement fluid discharge pipe, the displacement fluid discharge pipe is arranged above the limiting block, and the distance between the displacement fluid discharge pipe and the limiting block is equal to the thickness of the piston.

4. The core displacement experimental apparatus as claimed in claim 1, wherein a displacement fluid inlet pipe and an exhaust pipe are further provided above the displacement fluid chamber.

5. The core displacement experimental apparatus as claimed in claim 4, wherein the displacement fluid inlet pipe is connected with a displacement fluid tank.

6. The core displacement experiment device as claimed in claim 1, wherein the intermediate container and the core holder are both disposed in a thermostat.

7. The core displacement experiment device as recited in claim 1, wherein the measuring cylinder is disposed on a weighing device, and a windshield is disposed around the weighing device.

8. The core displacement experiment device as claimed in claim 1, wherein the scale hose is provided with a metering scale.

9. The core displacement experiment device as claimed in claim 1, wherein a drain branch is further provided on the scale hose.

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