Viscosity Loss and Hydraulic Pressure Drop on Multilayer Separate Polymer Injection in Concentric Dual-Tubing
Multilayer separate polymer injection in concentric dual-tubing is a special method for enhancing oil recovery in later development stage of the multilayer formation. During the injection process, heat exchange occurs among the inner tubing, tubing annulus and formation, making the thermal transfer...
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| Language: | English |
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MDPI AG
2020-04-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/13/7/1637 |
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| author | Yi Zhang Jiexiang Wang Peng Jia Xiao Liu Xuxu Zhang Chang Liu Xiangwei Bai |
| author_facet | Yi Zhang Jiexiang Wang Peng Jia Xiao Liu Xuxu Zhang Chang Liu Xiangwei Bai |
| author_sort | Yi Zhang |
| collection | DOAJ |
| description | Multilayer separate polymer injection in concentric dual-tubing is a special method for enhancing oil recovery in later development stage of the multilayer formation. During the injection process, heat exchange occurs among the inner tubing, tubing annulus and formation, making the thermal transfer process more complicated than traditional one. This work focuses on the polymer flowing characteristics during the multilayer separate polymer flooding injection process in the wellbore. A temperature–viscosity numerical model is derived to investigate the influencing factors on polymer dual-tubing injection process. Then, an estimate-correct method is introduced to derive the numerical solutions. Several influences have been discussed, including the axial temperature distribution, viscosity distribution, pressure drop, and flow pattern of polymer. Results show that under low injecting rates, below 5 m<sup>3</sup>/d, formation temperature will greatly decrease the polymer viscosity. When the injecting rates above 20 m<sup>3</sup>/d, the polymer just decreases 1–3 mPa·s at the bottom of well, which is really small. Additionally, the temperature distribution, the coefficient of friction under different injecting rates have been discussed. Generally, this method provides a new way to analyze thermal conductivity during the polymer injection process which is meaningful for polymer flooding in the oilfield application. |
| first_indexed | 2024-03-10T20:44:20Z |
| format | Article |
| id | doaj.art-dbe5b8a64c05427583a3717585dfc942 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T20:44:20Z |
| publishDate | 2020-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-dbe5b8a64c05427583a3717585dfc9422023-11-19T20:27:43ZengMDPI AGEnergies1996-10732020-04-01137163710.3390/en13071637Viscosity Loss and Hydraulic Pressure Drop on Multilayer Separate Polymer Injection in Concentric Dual-TubingYi Zhang0Jiexiang Wang1Peng Jia2Xiao Liu3Xuxu Zhang4Chang Liu5Xiangwei Bai6School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, ChinaSchool of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, ChinaCollege of Pipeline and Civil Engineering, China University of Petroleum (East China), Qingdao 266580, ChinaSchool 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 Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, ChinaSchool of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, ChinaMultilayer separate polymer injection in concentric dual-tubing is a special method for enhancing oil recovery in later development stage of the multilayer formation. During the injection process, heat exchange occurs among the inner tubing, tubing annulus and formation, making the thermal transfer process more complicated than traditional one. This work focuses on the polymer flowing characteristics during the multilayer separate polymer flooding injection process in the wellbore. A temperature–viscosity numerical model is derived to investigate the influencing factors on polymer dual-tubing injection process. Then, an estimate-correct method is introduced to derive the numerical solutions. Several influences have been discussed, including the axial temperature distribution, viscosity distribution, pressure drop, and flow pattern of polymer. Results show that under low injecting rates, below 5 m<sup>3</sup>/d, formation temperature will greatly decrease the polymer viscosity. When the injecting rates above 20 m<sup>3</sup>/d, the polymer just decreases 1–3 mPa·s at the bottom of well, which is really small. Additionally, the temperature distribution, the coefficient of friction under different injecting rates have been discussed. Generally, this method provides a new way to analyze thermal conductivity during the polymer injection process which is meaningful for polymer flooding in the oilfield application.https://www.mdpi.com/1996-1073/13/7/1637polymer floodingmultilayer dual-tubing injectionthermal-viscosity couplingheat transfer |
| spellingShingle | Yi Zhang Jiexiang Wang Peng Jia Xiao Liu Xuxu Zhang Chang Liu Xiangwei Bai Viscosity Loss and Hydraulic Pressure Drop on Multilayer Separate Polymer Injection in Concentric Dual-Tubing Energies polymer flooding multilayer dual-tubing injection thermal-viscosity coupling heat transfer |
| title | Viscosity Loss and Hydraulic Pressure Drop on Multilayer Separate Polymer Injection in Concentric Dual-Tubing |
| title_full | Viscosity Loss and Hydraulic Pressure Drop on Multilayer Separate Polymer Injection in Concentric Dual-Tubing |
| title_fullStr | Viscosity Loss and Hydraulic Pressure Drop on Multilayer Separate Polymer Injection in Concentric Dual-Tubing |
| title_full_unstemmed | Viscosity Loss and Hydraulic Pressure Drop on Multilayer Separate Polymer Injection in Concentric Dual-Tubing |
| title_short | Viscosity Loss and Hydraulic Pressure Drop on Multilayer Separate Polymer Injection in Concentric Dual-Tubing |
| title_sort | viscosity loss and hydraulic pressure drop on multilayer separate polymer injection in concentric dual tubing |
| topic | polymer flooding multilayer dual-tubing injection thermal-viscosity coupling heat transfer |
| url | https://www.mdpi.com/1996-1073/13/7/1637 |
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