Mechanism of enhanced oil recovery by fuzzy-ball fluid as a novel oil-displacement agent
Fuzzy-ball fluid is a two-phase fluid composed of fuzzy-ball and base fluid. It can enhance oil recovery by approximately 30% after water flooding and polymer flooding, which has been demonstrated in laboratory experiments and field applications. However, the EOR mechanism of fuzzy-ball fluid still...
| Main Authors: | , , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2023-12-01
|
| Series: | Energy Reports |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352484722026737 |
| _version_ | 1797781961762144256 |
|---|---|
| author | Xiangchun Wang Maozong Gan Xumin Yang Peng Zhang Xiaojun Peng Yanxin Ju Yahao Kou Xing Yu Lihui Zheng Chao Wang |
| author_facet | Xiangchun Wang Maozong Gan Xumin Yang Peng Zhang Xiaojun Peng Yanxin Ju Yahao Kou Xing Yu Lihui Zheng Chao Wang |
| author_sort | Xiangchun Wang |
| collection | DOAJ |
| description | Fuzzy-ball fluid is a two-phase fluid composed of fuzzy-ball and base fluid. It can enhance oil recovery by approximately 30% after water flooding and polymer flooding, which has been demonstrated in laboratory experiments and field applications. However, the EOR mechanism of fuzzy-ball fluid still needs further research. In this study, the microstructure of fuzzy-ball was observed using optical and cryo-scanning electron microscopy. The EOR mechanism of fuzzy-ball fluid was investigated by the microscopic glass etching model experiment and inter-molecular force calculation. EOR contribution ratio of three parts of fuzzy-ball was evaluated by the single core flooding experiment. Results showed that fuzzy-ball was further subdivided into fuzzy-ball structure and floss structure. Correspondingly, the EOR effects of fuzzy-ball fluid were mainly divided into three parts: (a) base fluid. Emulsification was the main way for base fluid to enhance oil recovery; (b) fuzzy-ball structure. According to the distribution characteristics of residual oil, the EOR mechanisms of fuzzy-ball structure were mainly as follows: wedging displacement for membranous oil, squeezing-carrying mechanism for columnar oil, and extruding-squeezing mechanism for blind-end oil; (c) floss structure. Floss structure enhanced oil recovery mainly through entanglement and carrying mechanism. Moreover, the EOR contribution ratio of base fluid, fuzzy-ball structure, and floss structure are 18.35%, 50.94%, and 30.71%, respectively. This study elucidates the EOR mechanism of fuzzy-ball fluid and provides guidance for its subsequent field application and performance improvement. |
| first_indexed | 2024-03-13T00:04:20Z |
| format | Article |
| id | doaj.art-e5f58dbd49ad4ca484f139121e186ed8 |
| institution | Directory Open Access Journal |
| issn | 2352-4847 |
| language | English |
| last_indexed | 2024-03-13T00:04:20Z |
| publishDate | 2023-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Energy Reports |
| spelling | doaj.art-e5f58dbd49ad4ca484f139121e186ed82023-07-13T05:28:57ZengElsevierEnergy Reports2352-48472023-12-01914471463Mechanism of enhanced oil recovery by fuzzy-ball fluid as a novel oil-displacement agentXiangchun Wang0Maozong Gan1Xumin Yang2Peng Zhang3Xiaojun Peng4Yanxin Ju5Yahao Kou6Xing Yu7Lihui Zheng8Chao Wang9College of Petroleum Engineering, China University of Petroleum (Beijing), Beijing, 102249, China; Corresponding authors.College of Petroleum Engineering, China University of Petroleum (Beijing), Beijing, 102249, ChinaCollege of Petroleum Engineering, China University of Petroleum (Beijing), Beijing, 102249, ChinaCollege of Petroleum Engineering, China University of Petroleum (Beijing), Beijing, 102249, ChinaCollege of Petroleum Engineering, China University of Petroleum (Beijing), Beijing, 102249, ChinaBefar Group Co., LTD., Binzhou City, Shandong Province, 256619, ChinaCollege of Petroleum Engineering, China University of Petroleum (Beijing), Beijing, 102249, ChinaCollege of Petroleum Engineering, China University of Petroleum (Beijing), Beijing, 102249, ChinaCollege of Petroleum Engineering, China University of Petroleum (Beijing), Beijing, 102249, ChinaCollege of Petroleum Engineering, China University of Petroleum (Beijing), Beijing, 102249, China; Corresponding authors.Fuzzy-ball fluid is a two-phase fluid composed of fuzzy-ball and base fluid. It can enhance oil recovery by approximately 30% after water flooding and polymer flooding, which has been demonstrated in laboratory experiments and field applications. However, the EOR mechanism of fuzzy-ball fluid still needs further research. In this study, the microstructure of fuzzy-ball was observed using optical and cryo-scanning electron microscopy. The EOR mechanism of fuzzy-ball fluid was investigated by the microscopic glass etching model experiment and inter-molecular force calculation. EOR contribution ratio of three parts of fuzzy-ball was evaluated by the single core flooding experiment. Results showed that fuzzy-ball was further subdivided into fuzzy-ball structure and floss structure. Correspondingly, the EOR effects of fuzzy-ball fluid were mainly divided into three parts: (a) base fluid. Emulsification was the main way for base fluid to enhance oil recovery; (b) fuzzy-ball structure. According to the distribution characteristics of residual oil, the EOR mechanisms of fuzzy-ball structure were mainly as follows: wedging displacement for membranous oil, squeezing-carrying mechanism for columnar oil, and extruding-squeezing mechanism for blind-end oil; (c) floss structure. Floss structure enhanced oil recovery mainly through entanglement and carrying mechanism. Moreover, the EOR contribution ratio of base fluid, fuzzy-ball structure, and floss structure are 18.35%, 50.94%, and 30.71%, respectively. This study elucidates the EOR mechanism of fuzzy-ball fluid and provides guidance for its subsequent field application and performance improvement.http://www.sciencedirect.com/science/article/pii/S2352484722026737Fuzzy-ball fluidEnhanced oil recoveryOil-washing mechanismContribution ratios |
| spellingShingle | Xiangchun Wang Maozong Gan Xumin Yang Peng Zhang Xiaojun Peng Yanxin Ju Yahao Kou Xing Yu Lihui Zheng Chao Wang Mechanism of enhanced oil recovery by fuzzy-ball fluid as a novel oil-displacement agent Energy Reports Fuzzy-ball fluid Enhanced oil recovery Oil-washing mechanism Contribution ratios |
| title | Mechanism of enhanced oil recovery by fuzzy-ball fluid as a novel oil-displacement agent |
| title_full | Mechanism of enhanced oil recovery by fuzzy-ball fluid as a novel oil-displacement agent |
| title_fullStr | Mechanism of enhanced oil recovery by fuzzy-ball fluid as a novel oil-displacement agent |
| title_full_unstemmed | Mechanism of enhanced oil recovery by fuzzy-ball fluid as a novel oil-displacement agent |
| title_short | Mechanism of enhanced oil recovery by fuzzy-ball fluid as a novel oil-displacement agent |
| title_sort | mechanism of enhanced oil recovery by fuzzy ball fluid as a novel oil displacement agent |
| topic | Fuzzy-ball fluid Enhanced oil recovery Oil-washing mechanism Contribution ratios |
| url | http://www.sciencedirect.com/science/article/pii/S2352484722026737 |
| work_keys_str_mv | AT xiangchunwang mechanismofenhancedoilrecoverybyfuzzyballfluidasanoveloildisplacementagent AT maozonggan mechanismofenhancedoilrecoverybyfuzzyballfluidasanoveloildisplacementagent AT xuminyang mechanismofenhancedoilrecoverybyfuzzyballfluidasanoveloildisplacementagent AT pengzhang mechanismofenhancedoilrecoverybyfuzzyballfluidasanoveloildisplacementagent AT xiaojunpeng mechanismofenhancedoilrecoverybyfuzzyballfluidasanoveloildisplacementagent AT yanxinju mechanismofenhancedoilrecoverybyfuzzyballfluidasanoveloildisplacementagent AT yahaokou mechanismofenhancedoilrecoverybyfuzzyballfluidasanoveloildisplacementagent AT xingyu mechanismofenhancedoilrecoverybyfuzzyballfluidasanoveloildisplacementagent AT lihuizheng mechanismofenhancedoilrecoverybyfuzzyballfluidasanoveloildisplacementagent AT chaowang mechanismofenhancedoilrecoverybyfuzzyballfluidasanoveloildisplacementagent |