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Application of Water-Soluble Polymer/Biopolymer Combined with a Biosurfactant in Oil-Wet Fractured Carbonate Reservoirs
[Image: see text] Most fractured carbonate reservoirs are characterized by a highly permeable fracture zone surrounded by a low-permeability oil-wet matrix. These features make the displacement of oil from the matrix into the fracture zone almost impossible during water flooding. This paper presents...
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/PMC8223217/ https://www.ncbi.nlm.nih.gov/pubmed/34179611 http://dx.doi.org/10.1021/acsomega.1c00855 |
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author | Elyasi Gomari, Kamal Hughes, David Islam, Meez Rezaei Gomari, Sina |
author_facet | Elyasi Gomari, Kamal Hughes, David Islam, Meez Rezaei Gomari, Sina |
author_sort | Elyasi Gomari, Kamal |
collection | PubMed |
description | [Image: see text] Most fractured carbonate reservoirs are characterized by a highly permeable fracture zone surrounded by a low-permeability oil-wet matrix. These features make the displacement of oil from the matrix into the fracture zone almost impossible during water flooding. This paper presents the results of flooding with the polymer polyacrylamide (PAM) and the biopolymer xanthan gum (XG) in combination with a biosurfactant to enhance water imbibition into oil-wet fractured carbonate rocks. Core flooding experiments were conducted on induced horizontally fractured (at 180°) carbonate cores in room conditions (20 ± 2 °C). The polymer or biopolymer was used to plug the fracture zones, while the biosurfactant was added to the system to alter the wettability state of the rock matrix from oil-wet to water-wet. Rock surface characterization before and after core flooding was conducted using scanning electron microscopy (SEM). The results indicate that PAM flooding led to a higher reduction of 35.6% in fracture-matrix permeability than that with XG at 18.3%. The monitoring of oil production also showed that ultimate oil recovery levels from oil-wet fractured carbonate cores for the aforementioned systems were 16 and 8.7%, respectively, which can be attributed to the drive mechanisms of temporary fracture plugging as well as mobility ratio improvement due to the polymer and wettability alteration by the biosurfactant. SEM images confirm the proposed mechanisms, where the presence of the polymer/biopolymer followed by the biosurfactant can be detected at the rock surface as a result of chemical flow through the system. |
format | Online Article Text |
id | pubmed-8223217 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-82232172021-06-25 Application of Water-Soluble Polymer/Biopolymer Combined with a Biosurfactant in Oil-Wet Fractured Carbonate Reservoirs Elyasi Gomari, Kamal Hughes, David Islam, Meez Rezaei Gomari, Sina ACS Omega [Image: see text] Most fractured carbonate reservoirs are characterized by a highly permeable fracture zone surrounded by a low-permeability oil-wet matrix. These features make the displacement of oil from the matrix into the fracture zone almost impossible during water flooding. This paper presents the results of flooding with the polymer polyacrylamide (PAM) and the biopolymer xanthan gum (XG) in combination with a biosurfactant to enhance water imbibition into oil-wet fractured carbonate rocks. Core flooding experiments were conducted on induced horizontally fractured (at 180°) carbonate cores in room conditions (20 ± 2 °C). The polymer or biopolymer was used to plug the fracture zones, while the biosurfactant was added to the system to alter the wettability state of the rock matrix from oil-wet to water-wet. Rock surface characterization before and after core flooding was conducted using scanning electron microscopy (SEM). The results indicate that PAM flooding led to a higher reduction of 35.6% in fracture-matrix permeability than that with XG at 18.3%. The monitoring of oil production also showed that ultimate oil recovery levels from oil-wet fractured carbonate cores for the aforementioned systems were 16 and 8.7%, respectively, which can be attributed to the drive mechanisms of temporary fracture plugging as well as mobility ratio improvement due to the polymer and wettability alteration by the biosurfactant. SEM images confirm the proposed mechanisms, where the presence of the polymer/biopolymer followed by the biosurfactant can be detected at the rock surface as a result of chemical flow through the system. American Chemical Society 2021-06-09 /pmc/articles/PMC8223217/ /pubmed/34179611 http://dx.doi.org/10.1021/acsomega.1c00855 Text en © 2021 The Authors. Published by American Chemical Society 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 | Elyasi Gomari, Kamal Hughes, David Islam, Meez Rezaei Gomari, Sina Application of Water-Soluble Polymer/Biopolymer Combined with a Biosurfactant in Oil-Wet Fractured Carbonate Reservoirs |
title | Application of Water-Soluble Polymer/Biopolymer Combined
with a Biosurfactant in Oil-Wet Fractured Carbonate Reservoirs |
title_full | Application of Water-Soluble Polymer/Biopolymer Combined
with a Biosurfactant in Oil-Wet Fractured Carbonate Reservoirs |
title_fullStr | Application of Water-Soluble Polymer/Biopolymer Combined
with a Biosurfactant in Oil-Wet Fractured Carbonate Reservoirs |
title_full_unstemmed | Application of Water-Soluble Polymer/Biopolymer Combined
with a Biosurfactant in Oil-Wet Fractured Carbonate Reservoirs |
title_short | Application of Water-Soluble Polymer/Biopolymer Combined
with a Biosurfactant in Oil-Wet Fractured Carbonate Reservoirs |
title_sort | application of water-soluble polymer/biopolymer combined
with a biosurfactant in oil-wet fractured carbonate reservoirs |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8223217/ https://www.ncbi.nlm.nih.gov/pubmed/34179611 http://dx.doi.org/10.1021/acsomega.1c00855 |
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