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Mechanism of the Production Impact in Shale Gas Wells Caused by Water Invasion during Interwell Interference

[Image: see text] Interwell interference is a universal problem in shale gas development and can cause severe reductions in the productivity of producing wells. Studies have attempted to identify the root cause of interference in producing wells, but the mechanisms of production reduction and recove...

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Autores principales: Wang, Ke, Ye, Kairui, Jiang, Beibei, Li, Haitao, Tan, Yongsheng
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2021
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8717576/
https://www.ncbi.nlm.nih.gov/pubmed/34984311
http://dx.doi.org/10.1021/acsomega.1c05993
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author Wang, Ke
Ye, Kairui
Jiang, Beibei
Li, Haitao
Tan, Yongsheng
author_facet Wang, Ke
Ye, Kairui
Jiang, Beibei
Li, Haitao
Tan, Yongsheng
author_sort Wang, Ke
collection PubMed
description [Image: see text] Interwell interference is a universal problem in shale gas development and can cause severe reductions in the productivity of producing wells. Studies have attempted to identify the root cause of interference in producing wells, but the mechanisms of production reduction and recovery in impacted wells are still not clear. Thus, an effective preventive strategy is needed for producing wells when fracturing is performed in adjacent wells. According to the mechanism of spontaneous imbibition and water drainage in shale mico- and nanoscale pores, this paper introduces the water–gas distribution during fracturing and production and reveals that water drainage in micro- and nanoscale pores is mainly controlled by the amount of stored gas and follows the order of pore size. Based on this analysis, the mechanism by which interwell interference impacts the production of producing wells is explained for the first time. It is concluded that the secondary water invasion caused by interwell interference completely blocks the pores associated with long-term gas production but has little influence on the pores that have not yet drained or have produced only a small amount of gas, and smaller pores face a greater risk of water blockage. The proportion of drained pores formed during long-term gas production determines the effect of interwell interference on production; when more pores are drained by long-term gas production, greater damage occurs to the productivity of the producing well. The suggestion for preventing interwell interference is to reduce the time interval between fracturing operations at two adjacent wells, thereby diminishing the reduction in production.
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spelling pubmed-87175762022-01-03 Mechanism of the Production Impact in Shale Gas Wells Caused by Water Invasion during Interwell Interference Wang, Ke Ye, Kairui Jiang, Beibei Li, Haitao Tan, Yongsheng ACS Omega [Image: see text] Interwell interference is a universal problem in shale gas development and can cause severe reductions in the productivity of producing wells. Studies have attempted to identify the root cause of interference in producing wells, but the mechanisms of production reduction and recovery in impacted wells are still not clear. Thus, an effective preventive strategy is needed for producing wells when fracturing is performed in adjacent wells. According to the mechanism of spontaneous imbibition and water drainage in shale mico- and nanoscale pores, this paper introduces the water–gas distribution during fracturing and production and reveals that water drainage in micro- and nanoscale pores is mainly controlled by the amount of stored gas and follows the order of pore size. Based on this analysis, the mechanism by which interwell interference impacts the production of producing wells is explained for the first time. It is concluded that the secondary water invasion caused by interwell interference completely blocks the pores associated with long-term gas production but has little influence on the pores that have not yet drained or have produced only a small amount of gas, and smaller pores face a greater risk of water blockage. The proportion of drained pores formed during long-term gas production determines the effect of interwell interference on production; when more pores are drained by long-term gas production, greater damage occurs to the productivity of the producing well. The suggestion for preventing interwell interference is to reduce the time interval between fracturing operations at two adjacent wells, thereby diminishing the reduction in production. American Chemical Society 2021-12-15 /pmc/articles/PMC8717576/ /pubmed/34984311 http://dx.doi.org/10.1021/acsomega.1c05993 Text en © 2021 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by-nc-nd/4.0/Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works (https://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Wang, Ke
Ye, Kairui
Jiang, Beibei
Li, Haitao
Tan, Yongsheng
Mechanism of the Production Impact in Shale Gas Wells Caused by Water Invasion during Interwell Interference
title Mechanism of the Production Impact in Shale Gas Wells Caused by Water Invasion during Interwell Interference
title_full Mechanism of the Production Impact in Shale Gas Wells Caused by Water Invasion during Interwell Interference
title_fullStr Mechanism of the Production Impact in Shale Gas Wells Caused by Water Invasion during Interwell Interference
title_full_unstemmed Mechanism of the Production Impact in Shale Gas Wells Caused by Water Invasion during Interwell Interference
title_short Mechanism of the Production Impact in Shale Gas Wells Caused by Water Invasion during Interwell Interference
title_sort mechanism of the production impact in shale gas wells caused by water invasion during interwell interference
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8717576/
https://www.ncbi.nlm.nih.gov/pubmed/34984311
http://dx.doi.org/10.1021/acsomega.1c05993
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