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Geothermal extraction of natural gas hydrates and co 2 Integrated device and method for exhaust gas reinjection treatment

A natural gas and hydrate technology, which is applied in the fields of mining fluids, earthwork drilling, wellbore/well components, etc., can solve the problems of high cost and difficulty in the development of natural gas hydrate, achieve wide sources of heat energy, compensate for high development costs, Get the effect of saving time and effort in the process

Active Publication Date: 2020-04-14
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology

[0015] The object of the present invention is to provide a kind of geothermal exploitation natural gas hydrate and CO 2 The integrated device for waste gas reinjection treatment solves the problems of difficulty and cost in the development of natural gas hydrate in the prior art

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  • Geothermal extraction of natural gas hydrates and co <sub>2</sub> Integrated device and method for exhaust gas reinjection treatment

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Embodiment Construction

[0038] The present invention will be described in detail below in combination with specific embodiments.

[0039] The invention provides a geothermal extraction of natural gas hydrate and CO 2 Integrated devices for exhaust gas reinjection treatment, such as figure 1 As shown, the production well 16 and the injection well 18 are included. The production well 16 and the injection well 18 pass through the sea level 17 and the natural gas hydrate layer 19 in sequence. There are gas-water separator 11, gas collection tank 12, workshop 13, second high-pressure pump group 15 and injection well 18; gas-water separator 11 is connected with first high-pressure pump group 14 and injection well 18 in turn; A ground console 28 is connected to the top.

[0040] A first oil pipe 29 is arranged in the injection well 18, and an outlet 30 is opened at the bottom of the first oil pipe 29. A first oil casing annulus 33 is formed between the inner wall of the injection well 18 and the first oil...

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Abstract

The invention discloses an apparatus for integrated processing of natural gas hydrate exploitation by geothermy and waste CO2 reinjection. The apparatus comprises a producing well and an injection well. The producing well and the injection well pass through the sea level and a natural gas hydrate layer; both the bottoms of the producing well and the injection well are disposed in a geothermal layer; a gas-water separator, a gas collecting tank, a workshop, a second high-pressure pump unit and the injection well are connected to the top of the producing well in order; the gas-water separator is connected with a first high-pressure pump unit and the injection well in order; the top of the producing well is connected with a surface console. The invention further discloses a method for integrated processing of natural gas hydrate exploitation by geothermy and waste CO2 reinjection; renewable geothermal resources can be made full use, heat resources are widely ranged, the process of acquiring the heat resources is time and labor efficient, emission of CO2 in air is controlled, and greenhouse effect is controlled and the environment is protected; the problem that the terrible result, geological accident, is caused by stratigraphic consolidation decline caused by drop in stratum pressure is avoided.

Description

technical field [0001] The invention belongs to the technical field of oil and natural gas exploitation, in particular to a geothermal exploitation of natural gas hydrate and CO 2 An integrated device for waste gas reinjection treatment, the present invention also relates to a geothermal recovery of natural gas hydrate and CO 2 An integrated method of exhaust gas reinjection treatment. Background technique [0002] Natural gas hydrate (NGH), also known as "combustible ice", is an unconventional energy source with high density and high calorific value. Natural gas hydrate is usually buried at a depth of 0-1100 meters below the seabed with a water depth greater than 300 meters, and its resources are more than 100 times that of land tundra. Therefore, natural gas hydrate is known as "the most potential energy source in the 21st century", and it is also a new energy source with the largest reserves that has not yet been effectively developed on a large scale. [0003] In the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/22
Inventor 孙致学蔡峰闫桂京梁杰李清董刚张建光蔡明玉孙强徐杨吕抒桓张明明吴永平孙治雷
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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