Title:
SYSTEM AND METHOD FOR EXPLOITING MARINE NATURAL GAS HYDRATE RESOURCES
Document Type and Number:
WIPO Patent Application WO/2023/142553
Kind Code:
A1
Abstract:
Disclosed is a system for exploiting marine natural gas hydrate resources, the system comprising a vertical well. The vertical well comprises a casing (9), wherein the casing (9) is configured to penetrate a seawater layer (1) and a hydrate reservoir overlying layer (2) and penetrate downwards through a natural gas hydrate reservoir stratum (3); a perforation channel (11) is arranged at a section of the casing (9) located in the natural gas hydrate reservoir stratum; a horizontal well (4) is connected to a bottom end of the casing (9); a production string (8) is arranged in the casing (9) and extends downwards into the horizontal well (4); the bottom of the production string (8) is provided with a gas-water collecting inlet (13); a hot-water injection pipe (6) is arranged in the production string (8), and an annulus region formed between the production string (8) and the hot-water injection pipe (6) is configured to perform gas and water pumping depressurization operations; the bottom of the hot-water injection pipe (6) is provided with a hot-water injection port (16); and an air bag (14) is arranged in the horizontal well (4) and is connected to the hot-water injection port (16) of the hot-water injection pipe (6). Further disclosed is a method for using the system. A large-size natural gas hydrate exploitation well structure having the vertical well and the horizontal well enlarges an exploitation radius of natural gas hydrates and thus increases a hydrate decomposition exploitation area.
Inventors:
LI XIAOSEN (CN)
RUAN XUKE (CN)
CHEN ZHAOYANG (CN)
LI GANG (CN)
ZHANG YU (CN)
WANG YI (CN)
YAN KEFENG (CN)
ZHOU JIAYUAN (CN)
RUAN XUKE (CN)
CHEN ZHAOYANG (CN)
LI GANG (CN)
ZHANG YU (CN)
WANG YI (CN)
YAN KEFENG (CN)
ZHOU JIAYUAN (CN)
Application Number:
PCT/CN2022/127373
Publication Date:
August 03, 2023
Filing Date:
October 25, 2022
Export Citation:
Assignee:
GUANGZHOU INST ENERGY CONVERSION CAS (CN)
International Classes:
E21B43/01
Foreign References:
| CN103980970A | 2014-08-13 | |||
| CN107701151A | 2018-02-16 | |||
| CN106703780A | 2017-05-24 | |||
| JP6679038B1 | 2020-04-15 | |||
| US20200291754A1 | 2020-09-17 |
Attorney, Agent or Firm:
GUANGZHOU KEYUE I.P. LAW OFFICE (CN)
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