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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...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2021
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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. |
format | Online Article Text |
id | pubmed-8717576 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
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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