CN207730622U - Gas permeability of rocks experimental rig under a kind of gas hyperosmosis - Google Patents

Abstract

The utility model discloses a rock permeability test device under gas high osmotic pressure, which comprises an air pressure pump connected to one end of a sealing layer arranged in a water tank through an air supply pipe, the inner side wall of the sealing layer is closely attached to a test piece, and the sealing layer The other end is connected to the gas flow sensor through the exhaust pipe, and a gas collecting hood is arranged above the end of the sealing layer close to the exhaust pipe, and the gas collecting hood is connected to the gas flow sensor through the gas collecting pipe; the test device of the utility model can monitor the temperature of the sealing layer In addition, the water tank can reduce the experimental error and increase the accuracy of the test results. Its structure is simple, easy to operate and maintain, and can quickly obtain the physical parameters of the air permeability of different rock types under different osmotic pressures under the condition of simulating high osmotic pressure. Learn related parameters.

Description

A rock permeability test device under high gas osmotic pressure

technical field

The utility model relates to the field of rock physical parameter measurement, in particular to a rock permeability test device under high gas osmotic pressure.

Background technique

my country is rich in low-permeability oil and gas resources and has great potential for exploration and development. In the past 20 years, great achievements have been made in the exploration of low-permeability sandstone, marine carbonate rock and volcanic rock, and the world-class development supporting technology has been formed, and the large-scale and effective development of low-permeability oil and gas reservoirs has been realized, and the production of low-permeability oil and gas has continued. Its proportion in the production composition is increasing year by year. Regardless of the new proven reserves in recent years or the remaining oil and gas resources, low-permeability oil and gas will be the main target of exploration and development in the future. Low-permeability oil and gas will be the mainstream of exploration and development in China's future oil and gas industry, and it will play an important role in ensuring national energy security. strategic significance. Most of the existing equipment is used to measure the water permeability of sandstone in oil and gas areas, but there are few test devices for rock permeability under high permeability conditions. Therefore, it is necessary to design a device for rock permeability tests under high gas permeability.

Contents of the invention

The purpose of this utility model is to overcome the above-mentioned deficiencies, and provide a rock permeability test device under high gas osmotic pressure, which can quickly obtain the physical correlation of the gas permeability of different rock types under different osmotic pressures under the condition of simulating high osmotic pressure. parameter.

In order to solve the above technical problems, the utility model adopts the following technical solution: a rock permeability test device under high gas osmotic pressure, including an air pressure pump, and the air pressure pump is connected to one end of the sealing layer arranged in the water tank through an air supply pipe , the inner wall of the sealing layer is closely attached to the test piece, the other end of the sealing layer is connected to the gas flow sensor through the exhaust pipe, a gas collecting hood is arranged above the end of the sealing layer near the exhaust pipe, the collecting The gas hood is connected with the gas flow sensor through the gas collecting pipe.

Preferably, an air intake switch, a surge tank and a pressure gauge are sequentially arranged on the air delivery pipe.

Preferably, the sealing layer is a cylindrical structure, and its two ends are respectively connected to the air supply pipe and the exhaust pipe through conical caps.

Preferably, one side of the inlet of the air collecting hood is located above the sealing layer, and the other three sides of the inlet are in sealing connection with the top of the side wall of the tank.

Beneficial effects of the utility model: the test device of the utility model can monitor the airtightness of the sealing layer, in addition, the experimental error can be reduced through the water tank, and the accuracy of the test result can be increased. In the case of , quickly obtain the physical parameters of the air permeability of different rock types under different osmotic pressures.

Description of drawings

Figure 1 is a schematic diagram of the structure of a rock permeability test device under high gas permeability;

Fig. 2 is the structural representation of sealing layer and test piece installation in Fig. 1;

In the figure, air pressure pump 1, air supply pipe 2, water tank 3, sealing layer 4, test piece 5, exhaust pipe 6, gas flow sensor 7, gas collection hood 8, gas collection pipe 9, intake switch 10, and surge tank 11 , Pressure gauge 12, conical cover 13.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail.

As shown in Figures 1 and 2, a rock permeability test device under high gas osmotic pressure includes an air pump 1, and the air pump 1 is connected to one end of the sealing layer 4 arranged in the water tank 3 through an air supply pipe 2, and the The inner wall of the sealing layer 4 is closely attached to the test piece 5, the other end of the sealing layer 4 is connected to the gas flow sensor 7 through the exhaust pipe 6, and a gas collecting hood is arranged above the end of the sealing layer 4 close to the exhaust pipe 6 8. The gas collecting hood 8 is connected to the gas flow sensor 7 through the gas collecting pipe 9 .

Preferably, an air intake switch 10 , a surge tank 11 and a pressure gauge 12 are arranged sequentially on the air delivery pipe 2 .

Preferably, the sealing layer 4 is a cylindrical structure, and its two ends are respectively connected to the air supply pipe 2 and the exhaust pipe 6 through the conical cap 13 .

Preferably, one side of the inlet of the air collecting hood 8 is located above the sealing layer 4 , and the other three sides of the inlet are sealingly connected with the top of the side wall of the water tank 3 . This arrangement can prevent the gas passing through the test piece 5 from leaking from the connection position between the test piece 5 and the exhaust pipe 6 .

In this embodiment, the sealing layer 4 is composed of inner and outer sealing layers, the inner sealing material is epoxy resin glue, and the outer sealing material is a heat-shrinkable plastic sleeve.

The working steps of this embodiment are as follows:

(1): Specimen 5 is made into a cylindrical shape by drilling the rock core, cutting, and grinding. Before the experiment, wipe the exterior of specimen 5 with a clean cloth, and blow the surface with a blower;

(2): Nest the two conical covers 13 with the two ends of the test piece 5 respectively, and then set the sealing layer 4 on the cylindrical surface of the test piece 5, specifically: first apply epoxy resin glue evenly, and wait for sealing After the glue is dry, cut a section of heat-shrinkable plastic sleeve to cover the test piece 5, and use an electric hot blower to evenly bake the plastic sleeve to make the plastic sleeve closely adhere to the epoxy resin glue, pay attention to exhaust air, do not leave air bubbles, and seal it in the laboratory Good, ensure to reduce the seepage of air bubbles from the middle section of specimen 5;

(3): Connect the air supply pipe 2 and the exhaust pipe 6, put the sealed test piece 5 into the water tank 3, and then slowly inject water until the water level exceeds the air inlet of the air collecting hood 8, so that Ensure that after ventilation, the leaked gas at the connection position between the test piece 5 below the gas collecting hood 8 and the conical cover 13 and the exhaust pipe 6 can smoothly float up from the water and be collected into the gas collecting hood 8;

(4): Start the power supply, air pressure pump 1, set different inlet pressures according to the purpose of the test, wait until the gas flow sensor 7 is stable, read the readings, and record the corresponding pressure and flow.

(5): Set different gas pressures, and draw the relationship between pressure and flow according to the experimental data.

The above-mentioned embodiments are only preferred technical solutions of the present utility model, and should not be regarded as limitations on the present utility model. The embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other if there is no conflict. The scope of protection of the utility model shall be the technical solution described in the claims, including the equivalent replacements of the technical features in the technical solution described in the claims. That is, equivalent replacement and improvement within this scope are also within the protection scope of the present utility model.

Claims (4)

1. gas permeability of rocks experimental rig under a kind of gas hyperosmosis, including pulsometer（1）, it is characterised in that：The air pressure Pump（1）Pass through snorkel（2）With set on sink（3）Interior sealant（4）One end connects, the sealant（4）Madial wall and examination Part（5）It fits closely, the sealant（4）The other end passes through exhaust pipe（6）With gas flow sensor（7）Connection, it is described close Sealing（4）Close to exhaust pipe（6）One end above be equipped with gas gathering mask（8）, the gas gathering mask（8）Pass through gas collecting tube（9）With gas Flow sensor（7）Connection.

2. gas permeability of rocks experimental rig under a kind of gas hyperosmosis according to claim 1, it is characterised in that：It is described Snorkel（2）On also successively be equipped with air inlet switch（10）, vacuum tank（11）And pressure gauge（12）.

3. gas permeability of rocks experimental rig under a kind of gas hyperosmosis according to claim 1, it is characterised in that：It is described Sealant（4）To be columnar structured, both ends pass through conical lid（13）Respectively with snorkel（2）And exhaust pipe（6）Connection.

4. gas permeability of rocks experimental rig under a kind of gas hyperosmosis according to claim 1, it is characterised in that：It is described Gas gathering mask（8）Import is located at sealant on one side（4）Top, other three side of import and sink（3）Top side wall is tightly connected.