Experimental apparatus for exploiting natural gas hydrate reservoir by means of thermal fluid fracturing

An experimental device and hydrate technology, which are applied in earth-moving drilling, wellbore/well components, etc., can solve problems such as the inability to realize hydrate core thermal fluid fracturing and depressurization of fluid in hydrate reservoirs.

Active Publication Date: 2013-07-17
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology

The traditional triaxial hydraulic fracturing experimental device is only suitable for conventional fracturing experimental research, and cannot realize thermal fluid fractu...

Method used

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  • Experimental apparatus for exploiting natural gas hydrate reservoir by means of thermal fluid fracturing
  • Experimental apparatus for exploiting natural gas hydrate reservoir by means of thermal fluid fracturing
  • Experimental apparatus for exploiting natural gas hydrate reservoir by means of thermal fluid fracturing

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with the accompanying drawings.

[0021] Such as figure 1 As shown, the experimental device for exploiting natural gas hydrate reservoirs by thermal fluid fracturing includes a hydrate core triaxial fracturing system, a fracturing fluid injection system, a natural gas production system, and an acoustic emission monitoring system.

[0022] The size of the experimental hydrate core 26 is 200mm in length, 200mm in width, and 150mm in height. There is a vertical center hole with a diameter of 10mm and a length of 80mm in the center of the top surface; a seal with an outer diameter of 9mm, an inner diameter of 5mm, and a length of 70mm is pressure-resistant in the center hole. 30MPa steel pipe is used as the simulated wellbore 25. 10mm is reserved between the lower end of the steel pipe and the bottom surface of the central hole, which is used as the open hole section where cracks 24 are formed during frac...

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Abstract

The invention belongs to the technical field of unconventional oil and gas exploitation, and particularly relates to an experimental apparatus for exploiting natural gas hydrate reservoir by means of thermal fluid fracturing. The experimental apparatus for exploiting the natural gas hydrate reservoir by means of thermal fluid fracturing comprises a hydrate core three-axis fracturing system, a fracturing fluid injection system, a natural gas exploitation system and an acoustic emission monitoring system, and is characterized in that the hydrate core three-axis fracturing system is used for fracturing a hydrate core to form hydraulic fracture; the fracturing fluid injection system provides high-pressure thermal fracturing fluid in a hydrate fracturing procedure; the natural gas exploitation system is used for exploiting the natural gas hydrate core in a depressurization manner; and the acoustic emission monitoring system is used for detecting an expansion procedure of the fracture and flowing states of multiple phases of fluid in the fracture. The experimental apparatus has the advantages that a ground stress state of the actual natural gas hydrate reservoir can be truly simulated, and mechanism study and effectiveness evaluation for exploitation for the natural gas hydrate reservoir by means of thermal fluid fracturing can be implemented.

Description

technical field [0001] The invention belongs to the technical field of unconventional oil and gas exploitation, and in particular relates to an experimental device for exploiting natural gas hydrate reservoirs through thermal fluid fracturing. Background technique [0002] With the rapid increase in the demand for oil and gas energy in my country's economic development and the implementation of the new oil and gas energy strategy, the field of oil and gas exploration and development continues to expand, gradually shifting from conventional oil and gas resources to unconventional oil and gas resources. Natural gas hydrate is a new type of clean energy, and its reserves are about twice the total carbon content of the existing earth's fossil fuels (oil, natural gas and coal). The development of natural gas hydrate plays a decisive role in alleviating the energy depletion crisis faced by mankind. effect. The hydrate reserves in the continental slope and trough sediments of the ...

Claims

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Application Information

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IPC IPC(8): E21B49/00E21B49/08
Inventor 王志远孙宝江郭艳利侯磊
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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