CN112483051A

CN112483051A - Three-dimensional natural gas hydrate exploitation methane leakage simulation experiment system

Info

Publication number: CN112483051A
Application number: CN202011361162.XA
Authority: CN
Inventors: 丁根荣; 夏留荣
Original assignee: Jiangsu Kedi Petroleum Instrument Co ltd
Current assignee: Jiangsu Kedi Petroleum Instrument Co ltd
Priority date: 2020-11-27
Filing date: 2020-11-27
Publication date: 2021-03-12

Abstract

The invention discloses a three-dimensional natural gas hydrate exploitation methane leakage simulation experiment system which comprises an upper kettle body and a lower kettle body, wherein the lower kettle body is arranged below the upper kettle body, an isolation valve is arranged between the upper kettle body and the lower kettle body, a kettle cover is arranged at the top of the upper kettle body, the kettle cover is connected with the upper kettle body through a locking bolt, a camera shooting window and two light source windows are respectively arranged on the kettle cover, and the two light source windows are arranged on two sides of the camera shooting window.

Description

Three-dimensional natural gas hydrate exploitation methane leakage simulation experiment system

Technical Field

The invention relates to the technical field of methane leakage simulation experiment systems, in particular to a three-dimensional natural gas hydrate exploitation methane leakage simulation experiment system.

Background

Natural Gas Hydrate (Natural Gas Hydrate/Gas Hydrate), organic compound, chemical formula CH₄·nH₂And O. Namely, the combustible ice is an ice-like crystalline substance which is distributed in deep sea sediments or permafrost in land areas and is formed by natural gas and water under high pressure and low temperature conditions. They are also called "Combustible ice" (Combustible gas) or "solid gas" and "vapor ice" because they look like ice and burn on fire. In essence, a solid mass. Natural gas hydrates are widely distributed in nature in permanently frozen earth on continents, in sloping zones of islands, in elevations at the edges of active and passive continents, in polar continental stands, and in the deep water environment of the sea and some inland lakes.

The natural gas hydrate easily causes the leakage of methane in the exploitation process, and serious leakage can cause great potential safety hazard, so that a methane leakage simulation experiment system is necessary to be designed to observe the partial condition of methane.

Disclosure of Invention

The invention aims to provide a three-dimensional natural gas hydrate exploitation methane leakage simulation experiment system to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a three-dimensional natural gas hydrate exploitation methane leakage simulation experiment system, includes the cauldron body and the cauldron body down, the cauldron body sets up in last cauldron body below down, just go up the cauldron body and install isolation valve between the cauldron body down, it sets up the kettle cover to go up cauldron body top, just the kettle cover with go up through locking bolted connection between the cauldron body, set up the window of making a video recording and two light source windows on the kettle cover respectively, and two the light source window sets up in the window both sides of making a video recording.

Preferably, the application provides a three-dimensional natural gas hydrate exploits methane and leaks simulation experiment system, wherein, it sets up nitrogen gas layer, sea water layer, sea mud layer to go up cauldron internal chamber, the sea water layer sets up between nitrogen gas layer and sea mud layer, the nitrogen gas layer is close to the kettle cover.

Preferably, the three-dimensional natural gas hydrate exploitation methane leakage simulation experiment system provided by the application is characterized in that a hydrate layer is arranged in an inner cavity of the lower kettle body.

Preferably, the three-dimensional natural gas hydrate exploitation methane leakage simulation experiment system provided by the application, wherein the lower kettle body is further provided with a heating hole, and the heating hole is arranged below the hydrate layer.

Preferably, the three-dimensional natural gas hydrate exploitation methane leakage simulation experiment system provided by the application, wherein a balance interface is installed on one side of the lower kettle body, and a simulation well and a test interface are installed at the bottom of the lower kettle body.

Compared with the prior art, the invention has the beneficial effects that: the device has novel structural design and convenient operation, can simulate methane leakage in the mining process, and observe the distribution condition of methane in a seawater layer in the leakage process in real time, and has good experimental effect.

Drawings

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

In the figure: 1. the device comprises a lower kettle body, 2 heating holes, 3 hydrate layers, 4 isolation valves, 5 sea mud layers, 6 sea water layers, 7 kettle covers, 8 light source windows, 9 camera windows, 10 nitrogen layers, 11 upper kettle bodies, 12 balance interfaces, 13 simulation wells and test interfaces.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1, the present invention provides a technical solution: the utility model provides a three-dimensional natural gas hydrate exploitation methane leakage simulation experiment system, includes the cauldron body 11 and cauldron body 1 down, cauldron body 1 sets up in last cauldron body 11 below down, just go up cauldron body 11 and install isolation valve 4 down between the cauldron body 1, it sets up kettle cover 7 to go up cauldron body 11 top, just kettle cover 7 with go up through locking bolted connection between the cauldron body 11, set up camera shooting window 9 and two light source windows 8 on the kettle cover 7 respectively, and two light source window 8 sets up in camera shooting window 9 both sides.

In the invention, a nitrogen layer 10, a seawater layer 6 and a sea mud layer 5 are arranged in an inner cavity of an upper kettle body 11, the seawater layer 6 is arranged between the nitrogen layer 10 and the sea mud layer 5, and the nitrogen layer 10 is close to a kettle cover 7; the inner cavity of the lower kettle body 1 is provided with a hydrate layer 3.

In addition, in the invention, the lower kettle body 1 is also provided with a heating hole 2, and the heating hole 2 is arranged below the hydrate layer 3; a balance interface 12 is arranged on one side of the lower kettle body 1, and a simulation well and a test interface 13 are arranged at the bottom of the lower kettle body 1.

In the invention, a hydrate layer, a sea mud layer, seawater and a nitrogen layer are respectively arranged in a reaction kettle from bottom to top, the environment of a seabed hydrate layer is simulated in situ, the generation of a hydrate can be simulated in situ, an isolation valve is arranged between the hydrate layer and the sea mud, and the hydrate layer and the sea mud can be quickly opened to enable the decomposed hydrate gas to uniformly and vertically move upwards; and simulating methane leakage in the mining process, and observing the distribution condition of methane in a seawater layer in the leakage process in real time.

The hydrate layer is provided with a simulation well for researching different exploitation modes of the hydrate; meanwhile, a temperature and pressure measuring point is arranged to monitor the hydrate change condition in the hydrate generation and exploitation process.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a three-dimensional natural gas hydrate exploitation methane leakage simulation experiment system, includes cauldron body (11) and lower cauldron body (1), its characterized in that: cauldron body (1) sets up in last cauldron body (11) below down, just go up cauldron body (11) and install isolation valve (4) down between the cauldron body (1), it sets up kettle cover (7) to go up cauldron body (11) top, just kettle cover (7) with go up through locking bolted connection between the cauldron body (11), set up respectively on kettle cover (7) and make a video recording window (9) and two light source windows (8), and two light source window (8) set up in window (9) both sides of making a video recording.

2. The three-dimensional natural gas hydrate exploitation methane leakage simulation experiment system according to claim 1, wherein: go up cauldron body (11) inner chamber and set up nitrogen gas layer (10), sea water layer (6), sea mud layer (5), sea water layer (6) set up between nitrogen gas layer (10) and sea mud layer (5), nitrogen gas layer (10) are close to kettle cover (7).

3. The three-dimensional natural gas hydrate exploitation methane leakage simulation experiment system according to claim 1, wherein: and a hydrate layer (3) is arranged in the inner cavity of the lower kettle body (1).

4. The three-dimensional natural gas hydrate exploitation methane leakage simulation experiment system according to claim 1, wherein: still set up heating hole (2) on the cauldron body (1) down, just heating hole (2) set up in hydrate layer (3) below.

5. The three-dimensional natural gas hydrate exploitation methane leakage simulation experiment system according to claim 1, wherein: the device is characterized in that a balance interface (12) is installed on one side of the lower kettle body (1), and a simulation well and a test interface (13) are installed at the bottom of the lower kettle body (1).