Device and method for exploiting natural gas hydrates by means of thermal fluid fracturing

A natural gas and hydrate technology, which is applied in the direction of production fluid, earthwork drilling, wellbore/well components, etc., can solve problems such as long decomposition period, low heat and mass transfer efficiency, and limitation of production efficiency, and achieve high-efficiency decomposition and increase The effect of mining efficiency, improving conductivity and heat and mass transfer efficiency

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

Since natural gas hydrate is filled in the sediment pores in the form of solid cement, its heat and mass transfer efficiency is much lower than that of conventional oil and gas reservoirs, and it is limited by the limited contact a

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  • Device and method for exploiting natural gas hydrates by means of thermal fluid fracturing

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Embodiment Construction

[0029] The following is a further description of the device for exploiting natural gas hydrate by thermal fluid fracturing in conjunction with the accompanying drawings.

[0030] like figure 1 As shown, the device for exploiting natural gas hydrate by thermal fluid fracturing includes a fracturing fluid injection system, a natural gas extraction system, and a wellbore system; the three ports of the three-way valve 11 are respectively connected to the fracturing fluid injection system and the natural gas extraction system 1. Wellbore system connection; the fracturing fluid injection system is used to provide high-pressure thermal fluid fracturing fluid and inject it into the wellbore system; the natural gas production system is used to control the pressure difference between the hydrate reservoir and the ground to realize the depressurization of hydrate; The wellbore system is used to open the hydrate reservoir and guide the fluid into or out of the reservoir; the three-way val...

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Abstract

The invention belongs to the technical field of unconventional oil and gas exploitation, and particularly relates to a device and a method for exploiting natural gas hydrates by means of thermal fluid fracturing. The device for exploiting the natural gas hydrates by means of thermal fluid fracturing comprises a fracturing fluid injection system, a natural gas exploitation system and a well system; the fracturing fluid injection system is used for providing high-pressure thermal fracturing fluid and injecting the high-pressure thermal fracturing fluid into the well system; the natural gas exploitation system is used for controlling the pressure difference between a hydrate reservoir stratum and the ground so that the hydrates can be exploited in a depressurization manner; and the well system is used for opening the hydrate reservoir stratum and guiding the fluid to flow into or flow out of the reservoir stratum. The method for exploiting the natural gas hydrates by means of thermal fluid fracturing is implemented by the device. The device and the method have the advantages that a plurality of processes for exploiting hydrates can be combined and used together, the hydrate exploitation efficiency is improved, and the method for exploiting the hydrates is high in prospect.

Description

technical field [0001] The invention belongs to the technical field of unconventional oil and gas exploitation, and in particular relates to a device and method for exploiting natural gas hydrate. 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 natural gas resources. As a potential energy source, natural gas hydrate has broad prospects and development space. According to statistics, the distribution range of seabed natural gas hydrate accounts for 10% of the total ocean area, which is equivalent to 40 million square kilometers. It is by far the most valuable and promising energy source on the seabed, enough for human use for 100 years. Some scientists predict that the natural gas hydra...

Claims

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Application Information

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IPC IPC(8): E21B43/247
Inventor 王志远孙宝江郭艳利柯珂
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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