CN116477573B - Cut-off protection device for oil reservoir in-situ conversion hydrogen production experiment - Google Patents

Abstract

The present invention discloses a cutoff protection device for an in-situ conversion hydrogen production experiment in an oil reservoir, comprising an injection assembly, a cutoff protection assembly, a burner and a separation detection assembly. The burner is connected to the injection assembly via the cutoff protection assembly to cut off the gas refluxed in the burner. The separation detection assembly is connected to the burner to separate and detect the product of the burner. The cutoff protection assembly comprises a blocking piece, a protective piece and a Tesla valve. The blocking piece is connected to the injection assembly, and the protective piece is arranged on the blocking piece. The blocking piece is connected to the burner via the Tesla valve. The present invention avoids explosion during the experiment and threats to experimental instruments and experimenters through the mutual cooperation of the injection assembly, the cutoff protection assembly, the burner and the separation detection assembly.

Description

A cut-off protection device for in-situ conversion hydrogen production experiment in oil reservoirs

Technical Field

The invention relates to the technical field of petroleum and natural gas development experiments, in particular to a cutoff protection device used for an oil reservoir in-situ conversion hydrogen production experiment.

Background Art

In today's global energy transformation situation, hydrogen energy, as an environmentally friendly energy source, has huge demand at home and abroad. Traditional hydrogen production technology is affected by factors such as high energy consumption, high greenhouse gas emissions, serious environmental pollution, and high cost, which is not conducive to the development and deepening of large-scale hydrogen energy utilization projects. In order to reduce costs and further revitalize blocks that were previously considered to have no mining value, energy companies in various countries have begun to focus on the research of in-situ combustion hydrogen production technology in underground oil reservoirs. The in-situ hydrogen production method in underground oil reservoirs can make full use of resources that are difficult to mine, and has the advantages of low cost, light pollution, and reusable waste facilities. It is an efficient and green oil reservoir development technology. In the laboratory, when conducting in-situ conversion hydrogen production experiments in oil reservoirs, it is necessary to inject air or oxygen-rich gas into the burner, and then cut off the gas injection to realize the actual engineering well closure operation. When the reaction in the burner is completed, the gas is re-introduced and the above operation is repeated until the experiment is completed. In the experiment, cutting off the gas injection is likely to cause gas backflow in the burner, and the oxygen in the injected gas is likely to explode with the hydrogen generated during the experiment, which poses a serious threat to both the experimental instruments and the experimenters.

Summary of the invention

The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

The technical problem to be solved by the present invention is how to avoid threats to experimental instruments and experimental personnel due to explosions in an in-situ conversion hydrogen production experiment in an oil reservoir.

In order to solve the above technical problems, the present invention provides the following technical solutions: a cut-off protection device for an in-situ conversion hydrogen production experiment in an oil reservoir, comprising an injection assembly, a cut-off protection assembly, a burner and a separation detection assembly, wherein the burner is connected to the injection assembly through the cut-off protection assembly to cut off the gas refluxed in the burner, and the separation detection assembly is connected to the burner to separate and detect the product of the burner;

The cut-off protection assembly includes a blocking piece, a protective piece and a Tesla valve. The blocking piece is connected to the injection assembly, and the protective piece is arranged on the blocking piece. The blocking piece is connected to the burner through the Tesla valve to weaken the shock wave generated when deflagration or explosion occurs, thereby achieving an explosion suppression effect.

As a preferred solution of the cut-off protection device for in-situ conversion hydrogen production experiments in oil reservoirs described in the present invention, the blocking member includes a cut-off valve lower cylinder, a piston cover, a spring and a piston rod, the piston cover is arranged at the air inlet of the cut-off valve lower cylinder, the spring is arranged on the piston cover, and the piston rod is arranged on the spring to realize the cut-off of the injected gas.

As a preferred solution of the cut-off protection device for the in-situ conversion hydrogen production experiment in the oil reservoir described in the present invention, the protective component includes an upper cylinder body of the cut-off valve, a metal gasket and a bursting disc. The upper cylinder body of the cut-off valve is arranged on the lower cylinder body of the cut-off valve, the metal gasket is arranged at the connection between the upper cylinder body of the cut-off valve and the lower cylinder body of the cut-off valve, and the bursting disc is arranged at the top outlet of the upper cylinder body of the cut-off valve, so as to realize timely pressure relief in case of overpressure or explosion.

As a preferred solution of the cut-off protection device for the in-situ conversion hydrogen production experiment in oil reservoirs described in the present invention, the injection assembly includes an air tank, an oxygen tank, an air pipe, a two-way valve and a flow meter. The air tank and the oxygen tank are connected by an air pipe. The two-way valve is arranged on the air pipe to control the oxygen concentration. The flow meter is arranged on the air pipe to provide raw materials for the experiment.

As a preferred solution of the cut-off protection device for in-situ conversion hydrogen production experiment in oil reservoirs described in the present invention, wherein: the separation and detection component includes a gas-liquid separator, an oil-water separator, an oil product detection instrument, a gas analysis instrument and a computer, the gas-liquid separator is connected to the burner, the oil-water separator is connected to the liquid outlet of the gas-liquid separator, the oil product detection instrument is connected to the oil outlet of the oil-water separator, the oil product detection instrument is connected to the computer, the gas analysis instrument is connected to the gas outlet of the gas-liquid separator, and the gas analysis instrument is connected to the computer.

As a preferred solution of the cut-off protection device for in-situ conversion hydrogen production experiment in oil reservoirs described in the present invention, the protective member also includes a sealing ring, which is arranged between the bursting disc and the upper cylinder body of the cut-off valve. The material of the sealing ring is rubber, which ensures the sealing between the bursting disc and the upper cylinder body of the cut-off valve.

As a preferred solution of the cut-off protection device for in-situ conversion hydrogen production experiment in oil reservoirs described in the present invention, wherein: the metal gasket is provided with a connecting hole, an inlet and outlet hole, a sealing ring groove and a pressure relief hole, the connecting hole is located at the outer edge of the metal gasket, the inlet and outlet hole is located in the center of the metal gasket, the sealing ring groove is located between the connecting hole and the inlet and outlet hole, the metal gasket and the cut-off valve upper cylinder body and the cut-off valve lower cylinder body are sealed, the pressure relief hole is located between the inlet and outlet hole and the sealing ring groove, and connects the cut-off valve upper cylinder body and the cut-off valve lower cylinder body.

As a preferred solution of the cut-off protection device for in-situ conversion hydrogen production experiments in oil reservoirs described in the present invention, a horizontal hook is provided at the lower end of the piston rod, and a spring is hung on the piston rod through the horizontal hook; a groove is provided on the piston cover to connect the spring; and the piston rod and the upper cylinder body of the cut-off valve are cast as one piece.

The beneficial effects of the present invention are:

1. A Tesla valve is installed on the burner so that after the gas is cut off, the gas flowing back from the burner will be subject to great resistance, consuming a large amount of kinetic energy, and having a certain flow blocking effect, thereby protecting the experimental instruments and experimenters;

2. A blocking piece is set on the Tesla valve. When the gas refluxed from the burner enters the cylinder through the Tesla valve, it cannot flow out of the cylinder, thus cutting off the gas.

3. A protective piece is installed on the blocking piece. When the gas pressure in the cylinder reaches the critical value, the bursting piece can release pressure and energy in time;

4. If deflagration or explosion occurs in the burner, the Tesla valve can also weaken the shock wave generated to achieve the effect of explosion suppression.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

FIG1 is a schematic diagram of the overall structure of a cutoff protection device used for an in-situ conversion hydrogen production experiment in an oil reservoir.

FIG. 2 is a schematic diagram of the structure of the cutoff protection component of the cutoff protection device used in the in-situ conversion hydrogen production experiment of the oil reservoir.

FIG3 is a cross-sectional view of the cutoff protection device used for the in-situ conversion hydrogen production experiment in oil reservoir along the A-A direction in FIG2 .

In the figure: 100, injection assembly; 101a, air tank; 101b, oxygen tank; 101c, air pipe; 101d, two-way valve; 101e, flow meter; 200, cut-off protection assembly; 201, blocking piece; 201a, cut-off valve lower cylinder; 201b, piston cover; 201c, spring; 201d, piston rod; 201d-1, horizontal hook; 202, protective piece; 202a, cut-off valve upper cylinder; 202b, metal 202b-1, connecting hole; 202b-2, inlet and outlet hole; 202b-3, sealing ring groove; 202b-4, pressure relief hole; 202c, bursting disc; 202d, sealing ring; 203, Tesla valve; 300, burner; 400, separation and detection component; 401a, gas-liquid separator; 401b, oil-water separator; 401c, oil testing instrument; 401d, gas analysis instrument; 401e, computer.

DETAILED DESCRIPTION

In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

Example 1

1 and 2 , which are the first embodiment of the present invention, a cutoff protection device for an in-situ conversion hydrogen production experiment in an oil reservoir is provided, comprising an injection assembly 100 , a cutoff protection assembly 200 , a burner 300 and a separation detection assembly 400 .

Specifically, the burner 300 is connected to the injection assembly 100 through the cut-off protection assembly 200 to cut off the gas reflux in the burner 300, and the separation detection assembly 400 is connected to the burner 300 to separate and detect the products of the burner 300; the cut-off protection assembly 200 includes a blocking member 201, a protective member 202 and a Tesla valve 203, the blocking member 201 is connected to the injection assembly 100, the protective member 202 is arranged on the blocking member 201, and the blocking member 201 is connected to the burner 300 through the Tesla valve 203.

A cutoff protection assembly 200 is installed between the injection assembly 100 and the burner 300 to cut off the gas refluxed in the burner 300. The cutoff protection assembly 200 includes a blocking member 201, a protective member 202 and a Tesla valve 203. The air inlet of the injection assembly 100 is connected to the blocking member 201, and the protective member 202 is installed on the blocking member 201. At the same time, the blocking member 201 is connected to one end of the burner 300 through the Tesla valve 203, and the other end of the burner 300 is connected to the separation detection assembly 400 to detect the product separation of the burner 300. By installing the cutoff protection assembly 200 between the injection assembly 100 and the burner 300, the threat to experimental instruments and experimenters due to explosion can be avoided during the in-situ conversion hydrogen production experiment in the oil reservoir.

Example 2

1 and 2 , a second embodiment of the present invention is shown, which is based on the previous embodiment.

Specifically, the blocking member 201 includes a shut-off valve lower cylinder 201a, a piston cover 201b, a spring 201c and a piston rod 201d, the piston cover 201b is arranged at the air inlet of the shut-off valve lower cylinder 201a, the spring 201c is arranged on the piston cover 201b, and the piston rod 201d is arranged on the spring 201c.

The inlet end of the shut-off valve lower cylinder 201a and the injection assembly 100 are connected by bolts, and a piston cover 201b is installed at the air inlet in the shut-off valve lower cylinder 201a, and the piston cover 201b can be fitted with the air inlet. A spring 201c is fixedly installed on the piston cover 201b, and a piston rod 201d is installed on the spring 201c. The piston rod 201d runs through the cylinder body. In the intake state, the spring 201c contracts after being affected by the pressure difference on both sides of the piston cover 201b, driving the piston cover 201b to rise, and the gas flows into the cylinder; in the closed cylinder state, the piston cover 201b is subjected to a certain downward pressure due to the elastic force of the spring 201c itself, and is pressed with the air inlet of the shut-off valve lower cylinder 201a to realize the cutoff of the injected gas.

The protective member 202 includes an upper cylinder body 202a of the shut-off valve, a metal gasket 202b and a bursting disc 202c. The upper cylinder body 202a of the shut-off valve is arranged on the lower cylinder body 201a of the shut-off valve. The metal gasket 202b is arranged at the connection between the upper cylinder body 202a of the shut-off valve and the lower cylinder body 201a of the shut-off valve. The bursting disc 202c is arranged at the top outlet of the upper cylinder body 202a of the shut-off valve.

An upper cylinder body 202a of the shut-off valve is installed above the lower cylinder body 201a of the shut-off valve through a metal gasket 202b to form a complete shut-off valve. The metal gasket 202b also divides the cylinder body of the shut-off valve into two, forming two upper and lower pressure relief spaces to achieve a gradual pressure relief effect. At the same time, a bursting disc 202c is installed at the top outlet of the upper cylinder body 202a of the shut-off valve. When the gas pressure in the cylinder reaches a critical value, the gas pressure destroys the bursting disc 202c, thereby achieving timely pressure relief and energy release.

The injection assembly 100 includes an air tank 101a, an oxygen tank 101b, an air pipe 101c, a two-way valve 101d and a flow meter 101e. The air tank 101a and the oxygen tank 101b are connected through the air pipe 101c. The two-way valve 101d is arranged on the air pipe 101c to control the oxygen concentration. The flow meter 101e is arranged on the air pipe 101c.

The injection assembly 100 provides raw materials for the experiment. The air tank 101a and the oxygen tank 101b are connected in parallel through the air pipe 101c. A two-way valve 101d is installed on each of the air pipes 101c connecting the air tank 101a and the oxygen tank 101b to control the on-off of the air tank 101a and the oxygen tank 101b to adjust the concentration of the mixed gas entering the air pipe 101c. The air outlet of the air pipe 101c is connected to the inlet end of the lower cylinder body 201a of the shut-off valve, and a flow meter 101e is installed at one end of the air pipe 101c close to the air outlet to measure the mixed gas flowing into the shut-off valve.

The separation and detection component 400 includes a gas-liquid separator 401a, an oil-water separator 401b, an oil product detection instrument 401c, a gas analysis instrument 401d and a computer 401e. The gas-liquid separator 401a is connected to the burner 300, the oil-water separator 401b is connected to the liquid outlet of the gas-liquid separator 401a, the oil product detection instrument 401c is connected to the oil outlet of the oil-water separator 401b, the oil product detection instrument 401c is connected to the computer 401e, the gas analysis instrument 401d is connected to the gas outlet of the gas-liquid separator 401a, and the gas analysis instrument 401d is connected to the computer 401e.

The outlet end of the burner 300 is connected to the inlet end of the gas-liquid separator 401a, and the gas-liquid separation is performed on the product of the burner 300. The outlet end of the gas-liquid separator 401a is connected to the inlet end of the oil-water separator 401b, and the oil-water separation is performed on the liquid processed by the gas-liquid separator 401a. The oil outlet of the gas-liquid separator 401a is connected to the oil product detection instrument 401c, and the oil product detection instrument 401c is also connected to the computer 401e to detect the oil separated by the gas-liquid separator 401a. The gas outlet of the gas-liquid separator 401a is connected to the gas analysis instrument 401d, and the gas analysis instrument 401d is connected to the computer 401e to perform component analysis on the gas processed by the gas-liquid separator 401a.

Example 3

1 to 3 , there is shown a third embodiment of the present invention, which is based on the first two embodiments.

Specifically, the protective member 202 further includes a sealing ring 202d, which is disposed between the bursting disc 202c and the cut-off valve upper cylinder body 202a, and the material of the sealing ring 202d is rubber.

A sealing ring 202d is installed between the bursting disc 202c and the upper cylinder body 202a of the cut-off valve. The sealing ring 202d is made of rubber and has good elasticity, so as to ensure the sealing between the bursting disc 202c and the upper cylinder body 202a of the cut-off valve.

The metal gasket 202b is provided with a connecting hole 202b-1, an inlet and outlet hole 202b-2, a sealing ring groove 202b-3 and a pressure relief hole 202b-4. The connecting hole 202b-1 is located at the outer edge of the metal gasket 202b, the inlet and outlet hole 202b-2 is located at the center of the metal gasket 202b, the sealing ring groove 202b-3 is located between the connecting hole 202b-1 and the inlet and outlet hole 202b-2, and seals the metal gasket 202b and the shut-off valve upper cylinder body 202a and the shut-off valve lower cylinder body 201a. The pressure relief hole 202b-4 is located between the inlet and outlet hole 202b-2 and the sealing ring groove 202b-3, and connects the shut-off valve upper cylinder body 202a and the shut-off valve lower cylinder body 201a.

A connecting hole 202b-1 is provided on the outer edge of the metal gasket 202b so that the bolts connecting the cut-off valve upper cylinder body 202a and the cut-off valve lower cylinder body 201a can pass through the metal gasket 202b for easy installation. An inlet and outlet hole 202b-2 is provided in the center of the metal gasket 202b so that the piston rod 201d can pass through the metal gasket 202b for easy up and down movement. Sealing ring grooves 202b-3 are provided on the upper and lower sides of the metal gasket 202b. The sealing ring grooves 202b-3 are located in the connecting hole 202b-1. A pressure relief hole 202b-4 is provided between the inlet and outlet holes 202b-2 of the metal gasket 202b and the sealing ring groove 202b-3 to connect the cut-off valve upper cylinder 202a and the cut-off valve lower cylinder 201a, so as to achieve a gradual pressure relief effect.

A horizontal hook 201d-1 is provided at the lower end of the piston rod 201d, and the spring 201c is hung on the piston rod 201d through the horizontal hook 201d-1. A groove is provided on the piston cover 201b to connect the spring 201c. The piston rod 201d and the shut-off valve upper cylinder body 202a are cast as one piece.

A horizontal hook 201d-1 is installed at the lower end of the piston rod 201d, and the spring 201c is hung on the piston rod 201d through the horizontal hook 201d-1. A groove is opened on the upper surface of the piston cover 201b, and the spring is connected through the groove. At the same time, the piston rod 201d and the shut-off valve upper cylinder body 202a are cast as one piece, which is convenient for replacement of the spring 201c and the piston cover 201b or maintenance inside the cylinder.

When in use, before the experiment, first fill the burner 300 with oil sand, then connect the injection end of the burner 300 to the outlet end of the Tesla valve 203 in the cut-off protection component 200, and the output end of the burner 300 is connected to the inlet end of the gas-liquid separator 401a in the separation detection component 400 through a pipeline; after the connection is completed, before the ignition stage of the burner 300, inject air or oxygen-enriched air into the cut-off valve cylinder in the cut-off protection component 200. In the intake state, the spring 201c is contracted by the pressure difference on both sides of the piston cover 201b, driving the piston cover 201b to rise, and the gas flows into the cylinder and enters the burner 300 through the Tesla valve 203. Subsequently, the ignition operation is realized through the heating device in the burner 300, and the product in the burner 300 is The product of the burner 300 enters the gas-liquid separator 401a through the outlet of the burner 300 to separate gas from liquid, and then enters the oil-water separator 401b to separate oil from water in the liquid treated by the gas-liquid separator 401a. The oil separated by the oil-water separator 401b enters the oil product detection instrument 401c and is detected by the computer 401e. At the same time, the gas separated by the gas-liquid separator 401a enters the gas analysis instrument 401d and is analyzed for components by the computer 401e. By detecting the gas produced at different times, the hydrogen production conditions at different stages of the experiment can be analyzed, so as to judge the completion of the experiment. When the reaction in the burner 300 is completed, the gas is reintroduced and the above operation is repeated until the experiment is completed.

During the experiment, in order to realize the well shut-in operation in actual engineering, the experimenter will cut off the gas injection after injecting a certain amount of oxygen-containing gas. During the gas injection cut-off stage, the remaining mixed gas in the burner 300 will flow back. At this time, the Tesla valve 203 connected to the input end of the burner 300 will cause it to encounter great resistance during the backflow process, consuming a large amount of kinetic energy of the mixed gas, and preventing it from entering the shut-off valve cylinder, so as to achieve a certain flow blocking effect and realize the protection of the experimental instruments and experimenters; at the same time, if a gas burst occurs in the burner 300, or a deflagration or explosion caused by other reasons, the Tesla valve 203 can weaken most of the shock wave energy to achieve the effect of explosion suppression; when the gas refluxed from the burner 300 enters the cylinder through the Tesla valve 203, since it is in a closed cylinder state at this time, it is affected by the spring 20 1c's own elastic force, the piston cover 201b is subjected to a certain downward pressure and is pressed against the air inlet of the shut-off valve lower cylinder 201a, so that the mixed gas cannot flow out of the cylinder, thereby cutting off the gas and realizing secondary protection for the experimental instruments and experimenters; when the mixed gas entering the shut-off valve lower cylinder 201a reaches a certain pressure, the gas can enter the shut-off valve upper cylinder 202a through the pressure relief hole 202b-4 and the inlet and outlet holes 202b-2 on the metal gasket 202b, realizing local pressure relief and energy release; when the mixed gas enters the shut-off valve upper cylinder 202a and reaches a certain pressure, the mixed gas rushes out through the outlet at the top of the shut-off valve upper cylinder 202a, destroying the bursting disc 202c, so as to realize complete pressure relief and energy release and prevent the experimental instruments from exploding, thereby realizing another protection for the experimental instruments and experimenters.

It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims (6)

1. A cut-off protection device for oil reservoir normal position conversion hydrogen manufacturing experiment, its characterized in that: comprising the steps of (a) a step of,

The device comprises an injection assembly (100), a cut-off protection assembly (200), a burner (300) and a separation detection assembly (400), wherein the burner (300) is connected with the injection assembly (100) through the cut-off protection assembly (200), the gas flowing back in the burner is cut off, and the separation detection assembly (400) is connected with the burner (300) and is used for separating and detecting the products of the burner;

the cut-off protection assembly (200) comprises a blocking piece (201), a protection piece (202) and a Tesla valve (203), wherein the blocking piece (201) is connected with the injection assembly (100), the protection piece (202) is arranged on the blocking piece (201), and the blocking piece (201) is connected with the burner (300) through the Tesla valve (203);

The blocking piece (201) comprises a lower block valve cylinder (201 a), a piston cover (201 b), a spring (201 c) and a piston rod (201 d), wherein the piston cover (201 b) is arranged at an air inlet of the lower block valve cylinder (201 a), the spring (201 c) is arranged on the piston cover (201 b), and the piston rod (201 d) is arranged on the spring (201 c);

The protection piece (202) comprises a block valve upper cylinder body (202 a), a metal gasket (202 b) and a rupture disc (202 c), wherein the block valve upper cylinder body (202 a) is arranged on a block valve lower cylinder body (201 a), the metal gasket (202 b) is arranged at the joint of the block valve upper cylinder body (202 a) and the block valve lower cylinder body (201 a), and the rupture disc (202 c) is arranged at the top outlet of the block valve upper cylinder body (202 a).

2. The cut-off protection device for in situ conversion hydrogen production experiments of oil reservoirs of claim 1, wherein: the injection assembly (100) comprises an air tank (101 a), an oxygen tank (101 b), an air pipe (101 c), a two-way valve (101 d) and a flowmeter (101 e), wherein the air tank (101 a) and the oxygen tank (101 b) are connected through the air pipe (101 c), the two-way valve (101 d) is arranged on the air pipe (101 c) to control oxygen concentration, and the flowmeter (101 e) is arranged on the air pipe (101 c).

3. The cut-off protection device for in situ conversion hydrogen production experiments of oil reservoirs of claim 2, wherein: the separation detection assembly (400) comprises a gas-liquid separator (401 a), an oil-water separator (401 b), an oil product detection instrument (401 c), a gas analysis instrument (401 d) and a computer (401 e), wherein the gas-liquid separator (401 a) is connected with the burner (300), the oil-water separator (401 b) is communicated with a liquid outlet of the gas-liquid separator (401 a), the oil product detection instrument (401 c) is communicated with an oil outlet of the oil-water separator (401 b), the oil product detection instrument (401 c) is connected with the computer (401 e), the gas analysis instrument (401 d) is communicated with an air outlet of the gas-liquid separator (401 a), and the gas analysis instrument (401 d) is connected with the computer (401 e).

4. The cut-off protection device for in situ conversion hydrogen production experiments of oil reservoirs of claim 1, wherein: the protection piece (202) further comprises a sealing ring (202 d), the sealing ring (202 d) is arranged between the rupture disc (202 c) and the upper cylinder body (202 a) of the cut-off valve, and the sealing ring (202 d) is made of rubber.

5. The cut-off protection device for in situ conversion hydrogen production experiments of oil reservoirs of claim 1, wherein: the metal gasket (202 b) is provided with a connecting hole (202 b-1), an inlet and outlet hole (202 b-2), a sealing ring groove (202 b-3) and a pressure relief hole (202 b-4), the connecting hole (202 b-1) is positioned at the outer edge of the metal gasket (202 b), the inlet and outlet hole (202 b-2) is positioned at the center of the metal gasket (202 b), the sealing ring groove (202 b-3) is positioned between the connecting hole (202 b-1) and the inlet and outlet hole (202 b-2), sealing is carried out between the metal gasket and the upper cylinder body of the shut-off valve and the lower cylinder body of the shut-off valve, and the pressure relief hole (202 b-4) is positioned between the inlet and outlet hole (202 b-2) and the sealing ring groove (202 b-3) and is communicated with the upper cylinder body of the shut-off valve and the lower cylinder body of the shut-off valve.

6. The cut-off protection device for in situ conversion hydrogen production experiments of oil reservoirs of claim 1, wherein: the lower end of the piston rod (201 d) is provided with a transverse hook (201 d-1), a spring (201 c) is hung on the piston rod (201 d) through the transverse hook (201 d-1), a groove is formed in the piston cover (201 b) and is connected with the spring, and the piston rod (201 d) and the upper cylinder body (202 a) of the cut-off valve are cast integrally.