Modelling of Transient CO2/Water Flow in Wellbore considering Multiple Mass and Heat Transfer
A transient fully coupled model is proposed to investigate the two-phase flow of CO2 and water-based fluid in a wellbore, considering the complex mass and heat transfer in different flow patterns and dynamic coupling between the wellbore and reservoir. Based on mass conservation, momentum, and energ...
Saved in:
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2021-01-01
|
| Series: | Geofluids |
| Online Access: | http://dx.doi.org/10.1155/2021/8879205 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832566279550009344 |
|---|---|
| author | Xinxin Zhao Xiangzhen Yan Xiaohui Sun Qing Zhao Hongwei Jiang Yonghai Gao Guang Yang |
| author_facet | Xinxin Zhao Xiangzhen Yan Xiaohui Sun Qing Zhao Hongwei Jiang Yonghai Gao Guang Yang |
| author_sort | Xinxin Zhao |
| collection | DOAJ |
| description | A transient fully coupled model is proposed to investigate the two-phase flow of CO2 and water-based fluid in a wellbore, considering the complex mass and heat transfer in different flow patterns and dynamic coupling between the wellbore and reservoir. Based on mass conservation, momentum, and energy balance, the model employs a state-of-the-art equation of state and transport models to analyze the variations of multiphase flow behaviors and CO2 properties in a wellbore. Applied in the scenario of a drilled gas kick, the proposed model is used to simulate the processes of gas migration and two-phase flow in the wellbore. The results indicate that the CO2 solubility increases gradually with the increment of depth, the trend of which shows an abrupt change in 500-1000 m due to the phase transition of CO2. During kick development, the fronts of free gas and dissolved gas increase almost linearly with time. Through a comparison of CO2 and CH4 kicks, gas dissolution is found to significantly suppress the development process of CO2 kick. The error in kick prediction can reach 42% if the effect of gas dissolution is neglected. However, it can be neglected for CH4 kick. |
| format | Article |
| id | doaj-art-61a0290582a94482821190f5a618dca8 |
| institution | Kabale University |
| issn | 1468-8115 1468-8123 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geofluids |
| spelling | doaj-art-61a0290582a94482821190f5a618dca82025-02-03T01:04:36ZengWileyGeofluids1468-81151468-81232021-01-01202110.1155/2021/88792058879205Modelling of Transient CO2/Water Flow in Wellbore considering Multiple Mass and Heat TransferXinxin Zhao0Xiangzhen Yan1Xiaohui Sun2Qing Zhao3Hongwei Jiang4Yonghai Gao5Guang Yang6Key Laboratory of Unconventional Oil & Gas Development (China University of Petroleum (East China)), Ministry of Education, Qingdao 266580, ChinaKey Laboratory of Unconventional Oil & Gas Development (China University of Petroleum (East China)), Ministry of Education, Qingdao 266580, ChinaKey Laboratory of Unconventional Oil & Gas Development (China University of Petroleum (East China)), Ministry of Education, Qingdao 266580, ChinaCNPC Engineering Technology R & D Company Limited, Beijing 102206, ChinaCNPC Engineering Technology R & D Company Limited, Beijing 102206, ChinaKey Laboratory of Unconventional Oil & Gas Development (China University of Petroleum (East China)), Ministry of Education, Qingdao 266580, ChinaCNPC Engineering Technology R & D Company Limited, Beijing 102206, ChinaA transient fully coupled model is proposed to investigate the two-phase flow of CO2 and water-based fluid in a wellbore, considering the complex mass and heat transfer in different flow patterns and dynamic coupling between the wellbore and reservoir. Based on mass conservation, momentum, and energy balance, the model employs a state-of-the-art equation of state and transport models to analyze the variations of multiphase flow behaviors and CO2 properties in a wellbore. Applied in the scenario of a drilled gas kick, the proposed model is used to simulate the processes of gas migration and two-phase flow in the wellbore. The results indicate that the CO2 solubility increases gradually with the increment of depth, the trend of which shows an abrupt change in 500-1000 m due to the phase transition of CO2. During kick development, the fronts of free gas and dissolved gas increase almost linearly with time. Through a comparison of CO2 and CH4 kicks, gas dissolution is found to significantly suppress the development process of CO2 kick. The error in kick prediction can reach 42% if the effect of gas dissolution is neglected. However, it can be neglected for CH4 kick.http://dx.doi.org/10.1155/2021/8879205 |
| spellingShingle | Xinxin Zhao Xiangzhen Yan Xiaohui Sun Qing Zhao Hongwei Jiang Yonghai Gao Guang Yang Modelling of Transient CO2/Water Flow in Wellbore considering Multiple Mass and Heat Transfer Geofluids |
| title | Modelling of Transient CO2/Water Flow in Wellbore considering Multiple Mass and Heat Transfer |
| title_full | Modelling of Transient CO2/Water Flow in Wellbore considering Multiple Mass and Heat Transfer |
| title_fullStr | Modelling of Transient CO2/Water Flow in Wellbore considering Multiple Mass and Heat Transfer |
| title_full_unstemmed | Modelling of Transient CO2/Water Flow in Wellbore considering Multiple Mass and Heat Transfer |
| title_short | Modelling of Transient CO2/Water Flow in Wellbore considering Multiple Mass and Heat Transfer |
| title_sort | modelling of transient co2 water flow in wellbore considering multiple mass and heat transfer |
| url | http://dx.doi.org/10.1155/2021/8879205 |
| work_keys_str_mv | AT xinxinzhao modellingoftransientco2waterflowinwellboreconsideringmultiplemassandheattransfer AT xiangzhenyan modellingoftransientco2waterflowinwellboreconsideringmultiplemassandheattransfer AT xiaohuisun modellingoftransientco2waterflowinwellboreconsideringmultiplemassandheattransfer AT qingzhao modellingoftransientco2waterflowinwellboreconsideringmultiplemassandheattransfer AT hongweijiang modellingoftransientco2waterflowinwellboreconsideringmultiplemassandheattransfer AT yonghaigao modellingoftransientco2waterflowinwellboreconsideringmultiplemassandheattransfer AT guangyang modellingoftransientco2waterflowinwellboreconsideringmultiplemassandheattransfer |