Experimental Study of Sand Production during Depressurization Exploitation in Hydrate Silty-Clay Sediments

Silty-clay reservoirs are a weak point in sand production and sand control studies due to their low economy. However, China’s marine natural gas hydrates (NGH) mostly exist in silty-clay sediments, which restrict the sustainable and efficient development of NGH. In order to study the sand production...

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Published in:Energies
Main Authors: Jingsheng Lu, Dongliang Li, Yong He, Lingli Shi, Deqing Liang, Youming Xiong
Format: Text
Language:English
Published: Multidisciplinary Digital Publishing Institute 2019
Subjects:
Online Access:https://doi.org/10.3390/en12224268
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spelling ftmdpi:oai:mdpi.com:/1996-1073/12/22/4268/ 2023-08-20T04:07:58+02:00 Experimental Study of Sand Production during Depressurization Exploitation in Hydrate Silty-Clay Sediments Jingsheng Lu Dongliang Li Yong He Lingli Shi Deqing Liang Youming Xiong 2019-11-08 application/pdf https://doi.org/10.3390/en12224268 EN eng Multidisciplinary Digital Publishing Institute https://dx.doi.org/10.3390/en12224268 https://creativecommons.org/licenses/by/4.0/ Energies; Volume 12; Issue 22; Pages: 4268 methane hydrate silty-clay sediments sand production experiments exploitation Text 2019 ftmdpi https://doi.org/10.3390/en12224268 2023-07-31T22:46:38Z Silty-clay reservoirs are a weak point in sand production and sand control studies due to their low economy. However, China’s marine natural gas hydrates (NGH) mostly exist in silty-clay sediments, which restrict the sustainable and efficient development of NGH. In order to study the sand production of hydrate silty-clay sediments, hydrate production experiments in vertical wells and horizontal wells were carried out using a self-developed hydrate sand production and sand control simulation device. The results showed a great difference between the hydrate silty-clay sediments and hydrate sand sediments. The significant differences in production pressure and production temperature between the different layers indicated the low permeability and low heterogeneity of the hydrate silty-clay sediments. The sliding settlement of the overall depression in the horizontal well and overall subsidence in the vertical well of the hydrate silty-clay reservoir would easily lead to silty-clay flow and large-scale sand production. When water rates decreased, the property of “silty-clay sediment filtration and wall building” was found, which formed a “mud cake” around the wellbore. The good strength of adhesion and fracture permeability of the “mud cake” provided ideas for reservoir reformation. This study further discusses sand production and sediment reformation in hydrate silty-clay sediments. Text Methane hydrate MDPI Open Access Publishing Energies 12 22 4268
institution Open Polar
collection MDPI Open Access Publishing
op_collection_id ftmdpi
language English
topic methane hydrate
silty-clay sediments
sand production
experiments
exploitation
spellingShingle methane hydrate
silty-clay sediments
sand production
experiments
exploitation
Jingsheng Lu
Dongliang Li
Yong He
Lingli Shi
Deqing Liang
Youming Xiong
Experimental Study of Sand Production during Depressurization Exploitation in Hydrate Silty-Clay Sediments
topic_facet methane hydrate
silty-clay sediments
sand production
experiments
exploitation
description Silty-clay reservoirs are a weak point in sand production and sand control studies due to their low economy. However, China’s marine natural gas hydrates (NGH) mostly exist in silty-clay sediments, which restrict the sustainable and efficient development of NGH. In order to study the sand production of hydrate silty-clay sediments, hydrate production experiments in vertical wells and horizontal wells were carried out using a self-developed hydrate sand production and sand control simulation device. The results showed a great difference between the hydrate silty-clay sediments and hydrate sand sediments. The significant differences in production pressure and production temperature between the different layers indicated the low permeability and low heterogeneity of the hydrate silty-clay sediments. The sliding settlement of the overall depression in the horizontal well and overall subsidence in the vertical well of the hydrate silty-clay reservoir would easily lead to silty-clay flow and large-scale sand production. When water rates decreased, the property of “silty-clay sediment filtration and wall building” was found, which formed a “mud cake” around the wellbore. The good strength of adhesion and fracture permeability of the “mud cake” provided ideas for reservoir reformation. This study further discusses sand production and sediment reformation in hydrate silty-clay sediments.
format Text
author Jingsheng Lu
Dongliang Li
Yong He
Lingli Shi
Deqing Liang
Youming Xiong
author_facet Jingsheng Lu
Dongliang Li
Yong He
Lingli Shi
Deqing Liang
Youming Xiong
author_sort Jingsheng Lu
title Experimental Study of Sand Production during Depressurization Exploitation in Hydrate Silty-Clay Sediments
title_short Experimental Study of Sand Production during Depressurization Exploitation in Hydrate Silty-Clay Sediments
title_full Experimental Study of Sand Production during Depressurization Exploitation in Hydrate Silty-Clay Sediments
title_fullStr Experimental Study of Sand Production during Depressurization Exploitation in Hydrate Silty-Clay Sediments
title_full_unstemmed Experimental Study of Sand Production during Depressurization Exploitation in Hydrate Silty-Clay Sediments
title_sort experimental study of sand production during depressurization exploitation in hydrate silty-clay sediments
publisher Multidisciplinary Digital Publishing Institute
publishDate 2019
url https://doi.org/10.3390/en12224268
genre Methane hydrate
genre_facet Methane hydrate
op_source Energies; Volume 12; Issue 22; Pages: 4268
op_relation https://dx.doi.org/10.3390/en12224268
op_rights https://creativecommons.org/licenses/by/4.0/
op_doi https://doi.org/10.3390/en12224268
container_title Energies
container_volume 12
container_issue 22
container_start_page 4268
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