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System and method for exploiting sea area hydrates through thermoelectric power generation and heat stimulation method

A thermoelectric power generation and hydrate technology, which is applied in the fields of mining fluids, generators/motors, electrical components, etc., can solve the problems of low energy utilization efficiency, low heat utilization rate, heat loss, etc., and achieves low technical difficulty and low energy consumption. , the effect of efficient development

Active Publication Date: 2019-03-12
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the mining process, the heat utilization rate is low, not only heating the hydrate, but also heating the sediment, pore gas and liquid, resulting in a large loss of heat, low energy utilization efficiency, and the need to consume a large amount of conventional energy to heat the injected heat. fluid

Method used

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  • System and method for exploiting sea area hydrates through thermoelectric power generation and heat stimulation method
  • System and method for exploiting sea area hydrates through thermoelectric power generation and heat stimulation method
  • System and method for exploiting sea area hydrates through thermoelectric power generation and heat stimulation method

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Embodiment 1

[0038] Example 1, see Figure 1-3 , a system for exploiting sea area hydrates by thermal shock method of thermoelectric power generation, including a plurality of production wells, heating wells 21 and thermoelectric power generation devices;

[0039] The plurality of production wells are arranged around the heater well 21 with the heater well 21 as the center.

[0040] During specific implementation, the number of the production wells is six, and the six production wells 15, 16, 17, 18, 19, 20 are respectively located at the six vertices of the equilateral hexagon, and the heating well 21 is located at the six vertices of the equilateral hexagon. The center of the polygon. The distance between the centerlines of the vertical well sections 12 of two adjacent production wells is 500m. That is, the side length of the equilateral hexagon where the six production wells 15, 16, 17, 18, 19, and 20 are located is 500 m. The distance from the centerline of the vertical well section...

Embodiment 2

[0049] Embodiment 2, a method for mining hydrates in sea areas, adopts the thermal shock method of thermoelectric power generation in Embodiment 1 to mine hydrates in sea areas, and the mining steps are as follows:

[0050] S1: production well layout, arrange the production well pattern in the production target area, use offshore drilling technology to complete drilling according to the pre-designed well trajectory to obtain multiple production wells, drill multiple perforations 10 in the horizontal section 11 of the production well, and The horizontal well section 11 of the production well communicates with the hydrate layer 4, and the horizontal well section 11 of the production well maintains a pressure 4-5 MPa lower than the pressure of the hydrate layer 4;

[0051] S2: Heating well drilling. In the production target area, a heating well 21 is drilled in the center of the area formed by multiple production wells, and the offshore drilling technology is used to drill through...

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Abstract

The invention discloses a system and method for exploiting sea area hydrates through a thermoelectric power generation and heat stimulation method. The system comprises multiple producing wells, a heating well and a thermoelectric power generation device; the producing wells are arranged around the heating well with the heating well as the center, the thermoelectric hot end in the thermoelectric power generation device is arranged at the bottom in a heating well geothermal reservoir section, an electric heating element set is arranged in a heating well hydrate layer section, the thermoelectricpower generation cold end is arranged in a seawater layer, and the thermoelectric hot end, the electric heating element set and the thermoelectric power generation cold end are connected in series through a high-temperature-resistance wire. According to the method, the system is utilized for heating a hydrate reservoir, natural gas and water which enter the producing wells are pumped out, gas-liquid separation is conducted, and the separated natural gas is conveyed to a gas gathering station. By means of the system, the water area temperature difference is ingeniously utilized, the thermoelectric power generation technology is combined with the heat stimulation method hydrate exploiting technology, the structural design is ingenious, the implementing technical difficulty is small, and theexploiting effect is very great.

Description

technical field [0001] The invention relates to a technology for exploiting seabed hydrate by using the difference between geothermal heat and ocean temperature, in particular to a system and method for exploiting sea area hydrate by thermal shock method of thermoelectric power generation. Background technique [0002] Gas hydrates are ice-like crystalline compounds composed of natural gas molecules and water molecules, distributed in deep-sea sediments or permafrost in continental regions. Hydrates only produce carbon dioxide and water after burning, which is a clean energy source with development prospects. According to the most conservative estimate, the stored energy is equivalent to twice that of all currently known fossil fuels. [0003] So far, scholars from various countries have proposed four main methods for mining hydrates: heat shock method, decompression method, inhibitor injection and carbon dioxide replacement method. Among them, the heat shock method directl...

Claims

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Application Information

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IPC IPC(8): E21B43/01E21B43/24H02N11/00
CPCH02N11/002E21B43/01E21B43/2401E21B41/0099
Inventor 姚军朱旭晨孙致学孙治雷何楚翘都巾文葛成红刘垒刘昌岭李彦龙
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)