Evaluation of clayed silt properties on the behavior of hydrate production in South China Sea
ABSTRACT: Gas hydrate is one kind of potential energy resources that is buried under deep seafloor or frozen areas. The first trial offshore production from the silty reservoir was conducted in the South China Sea by the China Geological Survey (CGS). During this test, there were many unique charact...
Published in: | China Geology |
---|---|
Main Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
KeAi Communications Co., Ltd.
2020
|
Subjects: | |
Online Access: | https://doi.org/10.31035/cg2020050 https://doaj.org/article/be916a190c084b4d98badb6357928bd3 |
id |
ftdoajarticles:oai:doaj.org/article:be916a190c084b4d98badb6357928bd3 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:be916a190c084b4d98badb6357928bd3 2023-05-15T17:12:06+02:00 Evaluation of clayed silt properties on the behavior of hydrate production in South China Sea Qiang Chen Gao-wei Hu Neng-you Wu Chang-ling Liu Qing-guo Meng Cheng-feng Li Jian-ye Sun Yan-long Li 2020-09-01T00:00:00Z https://doi.org/10.31035/cg2020050 https://doaj.org/article/be916a190c084b4d98badb6357928bd3 EN eng KeAi Communications Co., Ltd. http://www.sciencedirect.com/science/article/pii/S2096519220301725 https://doaj.org/toc/2096-5192 2096-5192 doi:10.31035/cg2020050 https://doaj.org/article/be916a190c084b4d98badb6357928bd3 China Geology, Vol 3, Iss 3, Pp 362-368 (2020) Natural gas hydrate Reservoir physical properties Hydrate structure Thermal-physical properties Irreducible water NGH exploration trial engineering Engineering (General). Civil engineering (General) TA1-2040 Geology QE1-996.5 article 2020 ftdoajarticles https://doi.org/10.31035/cg2020050 2023-02-12T01:31:24Z ABSTRACT: Gas hydrate is one kind of potential energy resources that is buried under deep seafloor or frozen areas. The first trial offshore production from the silty reservoir was conducted in the South China Sea by the China Geological Survey (CGS). During this test, there were many unique characteristics different from the sand reservoir, which was believed to be related to the clayed silt physical properties. In this paper, simulation experiments, facilities analysis, and theoretical calculation were used to confirm the hydrate structure, reservoir thermo-physical property, and bond water movement rule. And the behavior of how they affected production efficiency was analyzed. The results showed that: It was reasonable to use the structure I rather than structure II methane hydrate phase equilibrium data to make the production plan; the dissociation heat absorbed by hydrate was large enough to cause hydrate self-protection or reformation depend on the reservoir thermal transfer and gas supply; clayed silt got better thermal conductivity compared to coarse grain, but poor thermal convection especially with hydrate; clayed silt sediment was easy to bond water, but the irreducible water can be exchanged to free water under high production pressure, and the most obvious pressure range of water increment was 1.9–4.9 MPa. Article in Journal/Newspaper Methane hydrate Directory of Open Access Journals: DOAJ Articles China Geology 3 3 362 368 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Natural gas hydrate Reservoir physical properties Hydrate structure Thermal-physical properties Irreducible water NGH exploration trial engineering Engineering (General). Civil engineering (General) TA1-2040 Geology QE1-996.5 |
spellingShingle |
Natural gas hydrate Reservoir physical properties Hydrate structure Thermal-physical properties Irreducible water NGH exploration trial engineering Engineering (General). Civil engineering (General) TA1-2040 Geology QE1-996.5 Qiang Chen Gao-wei Hu Neng-you Wu Chang-ling Liu Qing-guo Meng Cheng-feng Li Jian-ye Sun Yan-long Li Evaluation of clayed silt properties on the behavior of hydrate production in South China Sea |
topic_facet |
Natural gas hydrate Reservoir physical properties Hydrate structure Thermal-physical properties Irreducible water NGH exploration trial engineering Engineering (General). Civil engineering (General) TA1-2040 Geology QE1-996.5 |
description |
ABSTRACT: Gas hydrate is one kind of potential energy resources that is buried under deep seafloor or frozen areas. The first trial offshore production from the silty reservoir was conducted in the South China Sea by the China Geological Survey (CGS). During this test, there were many unique characteristics different from the sand reservoir, which was believed to be related to the clayed silt physical properties. In this paper, simulation experiments, facilities analysis, and theoretical calculation were used to confirm the hydrate structure, reservoir thermo-physical property, and bond water movement rule. And the behavior of how they affected production efficiency was analyzed. The results showed that: It was reasonable to use the structure I rather than structure II methane hydrate phase equilibrium data to make the production plan; the dissociation heat absorbed by hydrate was large enough to cause hydrate self-protection or reformation depend on the reservoir thermal transfer and gas supply; clayed silt got better thermal conductivity compared to coarse grain, but poor thermal convection especially with hydrate; clayed silt sediment was easy to bond water, but the irreducible water can be exchanged to free water under high production pressure, and the most obvious pressure range of water increment was 1.9–4.9 MPa. |
format |
Article in Journal/Newspaper |
author |
Qiang Chen Gao-wei Hu Neng-you Wu Chang-ling Liu Qing-guo Meng Cheng-feng Li Jian-ye Sun Yan-long Li |
author_facet |
Qiang Chen Gao-wei Hu Neng-you Wu Chang-ling Liu Qing-guo Meng Cheng-feng Li Jian-ye Sun Yan-long Li |
author_sort |
Qiang Chen |
title |
Evaluation of clayed silt properties on the behavior of hydrate production in South China Sea |
title_short |
Evaluation of clayed silt properties on the behavior of hydrate production in South China Sea |
title_full |
Evaluation of clayed silt properties on the behavior of hydrate production in South China Sea |
title_fullStr |
Evaluation of clayed silt properties on the behavior of hydrate production in South China Sea |
title_full_unstemmed |
Evaluation of clayed silt properties on the behavior of hydrate production in South China Sea |
title_sort |
evaluation of clayed silt properties on the behavior of hydrate production in south china sea |
publisher |
KeAi Communications Co., Ltd. |
publishDate |
2020 |
url |
https://doi.org/10.31035/cg2020050 https://doaj.org/article/be916a190c084b4d98badb6357928bd3 |
genre |
Methane hydrate |
genre_facet |
Methane hydrate |
op_source |
China Geology, Vol 3, Iss 3, Pp 362-368 (2020) |
op_relation |
http://www.sciencedirect.com/science/article/pii/S2096519220301725 https://doaj.org/toc/2096-5192 2096-5192 doi:10.31035/cg2020050 https://doaj.org/article/be916a190c084b4d98badb6357928bd3 |
op_doi |
https://doi.org/10.31035/cg2020050 |
container_title |
China Geology |
container_volume |
3 |
container_issue |
3 |
container_start_page |
362 |
op_container_end_page |
368 |
_version_ |
1766068861121069056 |