An Ultra-Stable Polysaccharide Gel Plugging Agent for Water Shutoff in Mature Oil Reservoirs
Polyacrylamide-based gel plugging agents are extensively utilized in oilfields for water shutoff. However, their thermal stability, salt tolerance, and shear resistance are limited, making it difficult to achieve high-strength plugging and maintain stability under high-temperature and high-salinity...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2024-12-01
|
| Series: | Applied Sciences |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2076-3417/14/24/11957 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1846105919329402880 |
|---|---|
| author | Yang Yang Shuangxiang Ye Ping Liu Youqi Wang |
| author_facet | Yang Yang Shuangxiang Ye Ping Liu Youqi Wang |
| author_sort | Yang Yang |
| collection | DOAJ |
| description | Polyacrylamide-based gel plugging agents are extensively utilized in oilfields for water shutoff. However, their thermal stability, salt tolerance, and shear resistance are limited, making it difficult to achieve high-strength plugging and maintain stability under high-temperature and high-salinity reservoir conditions. This study proposes the use of chitosan (CTSs), a polysaccharide with a rigid cyclic structure, as the polymer. The organic cross-linker N,N′-methylenebisacrylamide (MBA) is incorporated via the Michael addition reaction mechanism to develop an ultra-stable, organically cross-linked chitosan gel system. The CTS/MBA gel system was evaluated under various environmental conditions using rheological testing and thermal aging to assess gel strength and stability. The results demonstrate significant improvements in gel strength and stability at high temperatures (up to 120 °C) and under high-shear conditions, as the increased cross-linking density enhanced resistance to thermal and mechanical degradation. Rapid gelation was observed with increasing MBA concentration, while pH and salinity further modulated gel properties. Scanning electron microscopy revealed the formation of a three-dimensional microstructure after gelation, which contributed to the enhanced properties. This study provides novel insights into optimizing polymer gel performance for the petroleum industry, particularly in high-temperature and high-shear environments. |
| format | Article |
| id | doaj-art-5ab99d59695c40f083b3cf0d0fb80f53 |
| institution | Kabale University |
| issn | 2076-3417 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj-art-5ab99d59695c40f083b3cf0d0fb80f532024-12-27T14:08:54ZengMDPI AGApplied Sciences2076-34172024-12-0114241195710.3390/app142411957An Ultra-Stable Polysaccharide Gel Plugging Agent for Water Shutoff in Mature Oil ReservoirsYang Yang0Shuangxiang Ye1Ping Liu2Youqi Wang3State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing 100083, ChinaCollege of Energy, Chengdu University of Technology, Chengdu 610059, ChinaState Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing 100083, ChinaState Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing 100083, ChinaPolyacrylamide-based gel plugging agents are extensively utilized in oilfields for water shutoff. However, their thermal stability, salt tolerance, and shear resistance are limited, making it difficult to achieve high-strength plugging and maintain stability under high-temperature and high-salinity reservoir conditions. This study proposes the use of chitosan (CTSs), a polysaccharide with a rigid cyclic structure, as the polymer. The organic cross-linker N,N′-methylenebisacrylamide (MBA) is incorporated via the Michael addition reaction mechanism to develop an ultra-stable, organically cross-linked chitosan gel system. The CTS/MBA gel system was evaluated under various environmental conditions using rheological testing and thermal aging to assess gel strength and stability. The results demonstrate significant improvements in gel strength and stability at high temperatures (up to 120 °C) and under high-shear conditions, as the increased cross-linking density enhanced resistance to thermal and mechanical degradation. Rapid gelation was observed with increasing MBA concentration, while pH and salinity further modulated gel properties. Scanning electron microscopy revealed the formation of a three-dimensional microstructure after gelation, which contributed to the enhanced properties. This study provides novel insights into optimizing polymer gel performance for the petroleum industry, particularly in high-temperature and high-shear environments.https://www.mdpi.com/2076-3417/14/24/11957temperature resistanceshear resistancepolysaccharide polymergelplugging agent |
| spellingShingle | Yang Yang Shuangxiang Ye Ping Liu Youqi Wang An Ultra-Stable Polysaccharide Gel Plugging Agent for Water Shutoff in Mature Oil Reservoirs Applied Sciences temperature resistance shear resistance polysaccharide polymer gel plugging agent |
| title | An Ultra-Stable Polysaccharide Gel Plugging Agent for Water Shutoff in Mature Oil Reservoirs |
| title_full | An Ultra-Stable Polysaccharide Gel Plugging Agent for Water Shutoff in Mature Oil Reservoirs |
| title_fullStr | An Ultra-Stable Polysaccharide Gel Plugging Agent for Water Shutoff in Mature Oil Reservoirs |
| title_full_unstemmed | An Ultra-Stable Polysaccharide Gel Plugging Agent for Water Shutoff in Mature Oil Reservoirs |
| title_short | An Ultra-Stable Polysaccharide Gel Plugging Agent for Water Shutoff in Mature Oil Reservoirs |
| title_sort | ultra stable polysaccharide gel plugging agent for water shutoff in mature oil reservoirs |
| topic | temperature resistance shear resistance polysaccharide polymer gel plugging agent |
| url | https://www.mdpi.com/2076-3417/14/24/11957 |
| work_keys_str_mv | AT yangyang anultrastablepolysaccharidegelpluggingagentforwatershutoffinmatureoilreservoirs AT shuangxiangye anultrastablepolysaccharidegelpluggingagentforwatershutoffinmatureoilreservoirs AT pingliu anultrastablepolysaccharidegelpluggingagentforwatershutoffinmatureoilreservoirs AT youqiwang anultrastablepolysaccharidegelpluggingagentforwatershutoffinmatureoilreservoirs AT yangyang ultrastablepolysaccharidegelpluggingagentforwatershutoffinmatureoilreservoirs AT shuangxiangye ultrastablepolysaccharidegelpluggingagentforwatershutoffinmatureoilreservoirs AT pingliu ultrastablepolysaccharidegelpluggingagentforwatershutoffinmatureoilreservoirs AT youqiwang ultrastablepolysaccharidegelpluggingagentforwatershutoffinmatureoilreservoirs |