Preparation of MOF-Based Core-Shell Gel Particles with Catalytic Activity and Their Plugging Performance
Drilling fluid systems for deep and ultra-deep wells are hampered by both high-temperature downhole environments and lengthy cycle periods. Suppose that the gel particle-plugging agent, the primary treatment agent in the system, fails to offer durable and stable plugging performance. In such a scena...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-01-01
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| Series: | Gels |
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| Online Access: | https://www.mdpi.com/2310-2861/9/1/44 |
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| author | Fengbao Liu Jinsheng Sun Xiao Luo |
| author_facet | Fengbao Liu Jinsheng Sun Xiao Luo |
| author_sort | Fengbao Liu |
| collection | DOAJ |
| description | Drilling fluid systems for deep and ultra-deep wells are hampered by both high-temperature downhole environments and lengthy cycle periods. Suppose that the gel particle-plugging agent, the primary treatment agent in the system, fails to offer durable and stable plugging performance. In such a scenario, the borehole wall is susceptible to instability and landslide after prolonged immersion, leading to downhole accidents. In this study, novel core-shell gel particles (modified ZIF) with ZIF particles employed as the core material and organosilicon-modified polyethylene polyamine (PEPA) as the polymer shell were fabricated using PEPA, in-house synthesized (3-aminopropyl) triethoxysilane (APTS), and the ZIF-8 metal-organic framework (MOF) as the raw materials to enhance the long-term plugging performance of gel plugging agents. The modified ZIF particles are nanoscale polygonal crystals and differ from conventional core-shell gel particles in that they feature high molecular sieve catalytic activity due to the presence of numerous interior micropores and mesopores. As a result, modified ZIF exhibits the performance characteristics of both rigid and flexible plugging agents and has an excellent catalytic cross-linking effect on the sulfonated phenolic resin (SMP-3) and sulfonated lignite resin (SPNH) in drilling fluids. Consequently, a cross-linking reaction occurs when SMP-3 and SPNH flow through the spacings in the plugging layer formed by the modified ZIF particles. This increases the viscosity of the liquid phase and simultaneously generates an insoluble gel, forming a particle-gel composite plugging structure with the modified ZIF and significantly enhancing the long-term plugging performance of the drilling fluid. |
| first_indexed | 2024-03-09T12:37:29Z |
| format | Article |
| id | doaj.art-003a385bd2ac4bd386614a37c7cf0d23 |
| institution | Directory Open Access Journal |
| issn | 2310-2861 |
| language | English |
| last_indexed | 2024-03-09T12:37:29Z |
| publishDate | 2023-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Gels |
| spelling | doaj.art-003a385bd2ac4bd386614a37c7cf0d232023-11-30T22:21:41ZengMDPI AGGels2310-28612023-01-01914410.3390/gels9010044Preparation of MOF-Based Core-Shell Gel Particles with Catalytic Activity and Their Plugging PerformanceFengbao Liu0Jinsheng Sun1Xiao Luo2School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, ChinaSchool of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, ChinaSchool of Chemical and Environmental Engineering, Yangtze University, Wuhan 430100, ChinaDrilling fluid systems for deep and ultra-deep wells are hampered by both high-temperature downhole environments and lengthy cycle periods. Suppose that the gel particle-plugging agent, the primary treatment agent in the system, fails to offer durable and stable plugging performance. In such a scenario, the borehole wall is susceptible to instability and landslide after prolonged immersion, leading to downhole accidents. In this study, novel core-shell gel particles (modified ZIF) with ZIF particles employed as the core material and organosilicon-modified polyethylene polyamine (PEPA) as the polymer shell were fabricated using PEPA, in-house synthesized (3-aminopropyl) triethoxysilane (APTS), and the ZIF-8 metal-organic framework (MOF) as the raw materials to enhance the long-term plugging performance of gel plugging agents. The modified ZIF particles are nanoscale polygonal crystals and differ from conventional core-shell gel particles in that they feature high molecular sieve catalytic activity due to the presence of numerous interior micropores and mesopores. As a result, modified ZIF exhibits the performance characteristics of both rigid and flexible plugging agents and has an excellent catalytic cross-linking effect on the sulfonated phenolic resin (SMP-3) and sulfonated lignite resin (SPNH) in drilling fluids. Consequently, a cross-linking reaction occurs when SMP-3 and SPNH flow through the spacings in the plugging layer formed by the modified ZIF particles. This increases the viscosity of the liquid phase and simultaneously generates an insoluble gel, forming a particle-gel composite plugging structure with the modified ZIF and significantly enhancing the long-term plugging performance of the drilling fluid.https://www.mdpi.com/2310-2861/9/1/44pluggingcore-shell gel particlesmetal-organic framework materialsmolecular sieve catalytic activitynanoscale crystals |
| spellingShingle | Fengbao Liu Jinsheng Sun Xiao Luo Preparation of MOF-Based Core-Shell Gel Particles with Catalytic Activity and Their Plugging Performance Gels plugging core-shell gel particles metal-organic framework materials molecular sieve catalytic activity nanoscale crystals |
| title | Preparation of MOF-Based Core-Shell Gel Particles with Catalytic Activity and Their Plugging Performance |
| title_full | Preparation of MOF-Based Core-Shell Gel Particles with Catalytic Activity and Their Plugging Performance |
| title_fullStr | Preparation of MOF-Based Core-Shell Gel Particles with Catalytic Activity and Their Plugging Performance |
| title_full_unstemmed | Preparation of MOF-Based Core-Shell Gel Particles with Catalytic Activity and Their Plugging Performance |
| title_short | Preparation of MOF-Based Core-Shell Gel Particles with Catalytic Activity and Their Plugging Performance |
| title_sort | preparation of mof based core shell gel particles with catalytic activity and their plugging performance |
| topic | plugging core-shell gel particles metal-organic framework materials molecular sieve catalytic activity nanoscale crystals |
| url | https://www.mdpi.com/2310-2861/9/1/44 |
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