Pore- and Core-Scale Recovery Performance of Consortium Bacteria from Low-Permeability Reservoir
Performance evaluation of microorganisms that have emulsifying and degrading effects on crude oil has been extensively conducted in the laboratory. However, the ultimate goal of microbial enhanced oil recovery is field application, so the pilot simulation experiments are crucial. In this study, a mi...
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| Format: | Article |
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MDPI AG
2023-11-01
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| Series: | Microorganisms |
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| Online Access: | https://www.mdpi.com/2076-2607/11/11/2738 |
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| author | Ziwei Bian Zhiyong Song Zena Zhi Xiangchun Zhang Yiqian Qu Ruiyang Chai Hanning Wu Yifei Wu |
| author_facet | Ziwei Bian Zhiyong Song Zena Zhi Xiangchun Zhang Yiqian Qu Ruiyang Chai Hanning Wu Yifei Wu |
| author_sort | Ziwei Bian |
| collection | DOAJ |
| description | Performance evaluation of microorganisms that have emulsifying and degrading effects on crude oil has been extensively conducted in the laboratory. However, the ultimate goal of microbial enhanced oil recovery is field application, so the pilot simulation experiments are crucial. In this study, a micro-visualization model and the real cores were chosen to investigate the actual recovery efficiency and the mechanism of the consortium bacteria B-ALL, which has been proven to have good emulsification and degradation effects in lab studies in porous media. At the same time, the cast thin sections and rate-controlled porosimetry were combined to analyze the pore throat structure of the displacement core. It was found that the recovery efficiency was positively correlated with the microbial injection volume as well as the incubation time. For the microscopic model with high pores and high permeability, the efficiency of secondary water flooding can be increased by 44.77% after six days of incubation with two pore volume microbes. For the real tight cores, the maximum secondary water flooding efficiency under the same condition was 6.98%. Through visual modeling, microorganisms increase the oil washing efficiency mainly by emulsification and changing the wettability. The generated oil droplets will play a role in plugging and improving the wave efficiency. However, tight reservoirs have the characteristics of large pores and small throats, and curved and necking throats are developed, greatly reducing permeability. The microbial recovery efficiency was lower under shorter cultivation times. This study provides a practical basis for the application of consortium bacteria in tight oil fields to enhance recovery. |
| first_indexed | 2024-03-09T16:34:53Z |
| format | Article |
| id | doaj.art-07ca79f8bdd34e2fb043026bf876b329 |
| institution | Directory Open Access Journal |
| issn | 2076-2607 |
| language | English |
| last_indexed | 2024-03-09T16:34:53Z |
| publishDate | 2023-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Microorganisms |
| spelling | doaj.art-07ca79f8bdd34e2fb043026bf876b3292023-11-24T14:57:05ZengMDPI AGMicroorganisms2076-26072023-11-011111273810.3390/microorganisms11112738Pore- and Core-Scale Recovery Performance of Consortium Bacteria from Low-Permeability ReservoirZiwei Bian0Zhiyong Song1Zena Zhi2Xiangchun Zhang3Yiqian Qu4Ruiyang Chai5Hanning Wu6Yifei Wu7Department of Geology, State Key Laboratory of Continental Dynamics, Northwest University, Xi’an 710069, ChinaSchool of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaDepartment of Geology, State Key Laboratory of Continental Dynamics, Northwest University, Xi’an 710069, ChinaDepartment of Geology, State Key Laboratory of Continental Dynamics, Northwest University, Xi’an 710069, ChinaDepartment of Geology, State Key Laboratory of Continental Dynamics, Northwest University, Xi’an 710069, ChinaDepartment of Geology, State Key Laboratory of Continental Dynamics, Northwest University, Xi’an 710069, ChinaDepartment of Geology, State Key Laboratory of Continental Dynamics, Northwest University, Xi’an 710069, ChinaCollege of Food Science and Technology, Northwest University, Xi’an 710069, ChinaPerformance evaluation of microorganisms that have emulsifying and degrading effects on crude oil has been extensively conducted in the laboratory. However, the ultimate goal of microbial enhanced oil recovery is field application, so the pilot simulation experiments are crucial. In this study, a micro-visualization model and the real cores were chosen to investigate the actual recovery efficiency and the mechanism of the consortium bacteria B-ALL, which has been proven to have good emulsification and degradation effects in lab studies in porous media. At the same time, the cast thin sections and rate-controlled porosimetry were combined to analyze the pore throat structure of the displacement core. It was found that the recovery efficiency was positively correlated with the microbial injection volume as well as the incubation time. For the microscopic model with high pores and high permeability, the efficiency of secondary water flooding can be increased by 44.77% after six days of incubation with two pore volume microbes. For the real tight cores, the maximum secondary water flooding efficiency under the same condition was 6.98%. Through visual modeling, microorganisms increase the oil washing efficiency mainly by emulsification and changing the wettability. The generated oil droplets will play a role in plugging and improving the wave efficiency. However, tight reservoirs have the characteristics of large pores and small throats, and curved and necking throats are developed, greatly reducing permeability. The microbial recovery efficiency was lower under shorter cultivation times. This study provides a practical basis for the application of consortium bacteria in tight oil fields to enhance recovery.https://www.mdpi.com/2076-2607/11/11/2738microbial enhanced oil recoveryconsortium bacteriavisualizationtight corerecovery efficiency |
| spellingShingle | Ziwei Bian Zhiyong Song Zena Zhi Xiangchun Zhang Yiqian Qu Ruiyang Chai Hanning Wu Yifei Wu Pore- and Core-Scale Recovery Performance of Consortium Bacteria from Low-Permeability Reservoir Microorganisms microbial enhanced oil recovery consortium bacteria visualization tight core recovery efficiency |
| title | Pore- and Core-Scale Recovery Performance of Consortium Bacteria from Low-Permeability Reservoir |
| title_full | Pore- and Core-Scale Recovery Performance of Consortium Bacteria from Low-Permeability Reservoir |
| title_fullStr | Pore- and Core-Scale Recovery Performance of Consortium Bacteria from Low-Permeability Reservoir |
| title_full_unstemmed | Pore- and Core-Scale Recovery Performance of Consortium Bacteria from Low-Permeability Reservoir |
| title_short | Pore- and Core-Scale Recovery Performance of Consortium Bacteria from Low-Permeability Reservoir |
| title_sort | pore and core scale recovery performance of consortium bacteria from low permeability reservoir |
| topic | microbial enhanced oil recovery consortium bacteria visualization tight core recovery efficiency |
| url | https://www.mdpi.com/2076-2607/11/11/2738 |
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