Parametric analysis on the transient two-phase wellbore model applied to the Yangyi high-temperature geothermal field
Abstract Purpose In high-temperature geothermal fields, interpretation of the dynamic two-phase state inside the production wells under different wellhead conditions are important to effectively use the geothermal heat source. Therefore, the corresponding wellbore models must have the capability to...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2025-01-01
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| Series: | Geothermal Energy |
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| Online Access: | https://doi.org/10.1186/s40517-024-00322-5 |
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| author | Chaofan Chen Hongwei Zhou Thomas Nagel Theo Renaud Dmitri Naumov Olaf Kolditz Haibing Shao |
| author_facet | Chaofan Chen Hongwei Zhou Thomas Nagel Theo Renaud Dmitri Naumov Olaf Kolditz Haibing Shao |
| author_sort | Chaofan Chen |
| collection | DOAJ |
| description | Abstract Purpose In high-temperature geothermal fields, interpretation of the dynamic two-phase state inside the production wells under different wellhead conditions are important to effectively use the geothermal heat source. Therefore, the corresponding wellbore models must have the capability to simulate transient flow and energy state in geothermal wellbores, as well as advective and conductive heat and mass interactions with surrounding formation. Methods In this study, a transient two-phase wellbore model is developed and implemented in the open source software OpenGeoSys, to simulate both flow and energy state in the wellbore, as well as advective and conductive heat and mass interactions with surrounding formation. The model is first verified against analytical solutions and numerical results from the open-source simulator FloWell. The model is then further validated with well logging data from the Yangyi geothermal field in Tibet, China. Results Based on the simulation results of the parametric analysis, the conductive heat loss of the high-velocity geothermal production well in the Yangyi geothermal field is found to be limited and the influence can be safely neglected after 8 h of discharge. The flash point location in the wellbore moves upwards for 112 m along with the decrease in fluid enthalpy by 200 kJ/kg. In the wellbore shut-in process, the wellhead pressure decreases with decreasing velocity, while the location of the flash point does not change much. After wellbore shut-in, a two-phase state still exists in the closed wellbore, and the temperature profile is dominated by conductive heat exchange with the surrounding formation. Taking into account the impact of the feed zone, the mass flow rate of the ZK203 well in the Yangyi geothermal field increases from 122.87 to 126.26 t/h when the wellhead pressure decreases from 1.26 to 1.18 MPa. Conclusion The open-source two-phase wellbore model developed and implemented in this work provides preliminary insights into the transition and evolution of the two-phase state in high-temperature production wells considering advective and conductive interactions with the surrounding formation. |
| format | Article |
| id | doaj-art-c71eca6abd4b4cd79e9ff2bef1a71ad5 |
| institution | Kabale University |
| issn | 2195-9706 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Geothermal Energy |
| spelling | doaj-art-c71eca6abd4b4cd79e9ff2bef1a71ad52025-01-05T12:13:15ZengSpringerOpenGeothermal Energy2195-97062025-01-0113112610.1186/s40517-024-00322-5Parametric analysis on the transient two-phase wellbore model applied to the Yangyi high-temperature geothermal fieldChaofan Chen0Hongwei Zhou1Thomas Nagel2Theo Renaud3Dmitri Naumov4Olaf Kolditz5Haibing Shao6School of Energy and Mining Engineering, China University of Mining and Technology (Beijing)School of Energy and Mining Engineering, China University of Mining and Technology (Beijing)Geotechnical Institute, Technische Universität Bergakademie FreibergDepartment of Engineering Science, University of AucklandGeotechnical Institute, Technische Universität Bergakademie FreibergDepartment of Environmental Informatics, Helmholtz Centre for Environmental Research-UFZDepartment of Environmental Informatics, Helmholtz Centre for Environmental Research-UFZAbstract Purpose In high-temperature geothermal fields, interpretation of the dynamic two-phase state inside the production wells under different wellhead conditions are important to effectively use the geothermal heat source. Therefore, the corresponding wellbore models must have the capability to simulate transient flow and energy state in geothermal wellbores, as well as advective and conductive heat and mass interactions with surrounding formation. Methods In this study, a transient two-phase wellbore model is developed and implemented in the open source software OpenGeoSys, to simulate both flow and energy state in the wellbore, as well as advective and conductive heat and mass interactions with surrounding formation. The model is first verified against analytical solutions and numerical results from the open-source simulator FloWell. The model is then further validated with well logging data from the Yangyi geothermal field in Tibet, China. Results Based on the simulation results of the parametric analysis, the conductive heat loss of the high-velocity geothermal production well in the Yangyi geothermal field is found to be limited and the influence can be safely neglected after 8 h of discharge. The flash point location in the wellbore moves upwards for 112 m along with the decrease in fluid enthalpy by 200 kJ/kg. In the wellbore shut-in process, the wellhead pressure decreases with decreasing velocity, while the location of the flash point does not change much. After wellbore shut-in, a two-phase state still exists in the closed wellbore, and the temperature profile is dominated by conductive heat exchange with the surrounding formation. Taking into account the impact of the feed zone, the mass flow rate of the ZK203 well in the Yangyi geothermal field increases from 122.87 to 126.26 t/h when the wellhead pressure decreases from 1.26 to 1.18 MPa. Conclusion The open-source two-phase wellbore model developed and implemented in this work provides preliminary insights into the transition and evolution of the two-phase state in high-temperature production wells considering advective and conductive interactions with the surrounding formation.https://doi.org/10.1186/s40517-024-00322-5Geothermal wellbore modelTwo-phase flowOpen-loop systemTransient stateYangyi geothermal fieldOpenGeoSys |
| spellingShingle | Chaofan Chen Hongwei Zhou Thomas Nagel Theo Renaud Dmitri Naumov Olaf Kolditz Haibing Shao Parametric analysis on the transient two-phase wellbore model applied to the Yangyi high-temperature geothermal field Geothermal Energy Geothermal wellbore model Two-phase flow Open-loop system Transient state Yangyi geothermal field OpenGeoSys |
| title | Parametric analysis on the transient two-phase wellbore model applied to the Yangyi high-temperature geothermal field |
| title_full | Parametric analysis on the transient two-phase wellbore model applied to the Yangyi high-temperature geothermal field |
| title_fullStr | Parametric analysis on the transient two-phase wellbore model applied to the Yangyi high-temperature geothermal field |
| title_full_unstemmed | Parametric analysis on the transient two-phase wellbore model applied to the Yangyi high-temperature geothermal field |
| title_short | Parametric analysis on the transient two-phase wellbore model applied to the Yangyi high-temperature geothermal field |
| title_sort | parametric analysis on the transient two phase wellbore model applied to the yangyi high temperature geothermal field |
| topic | Geothermal wellbore model Two-phase flow Open-loop system Transient state Yangyi geothermal field OpenGeoSys |
| url | https://doi.org/10.1186/s40517-024-00322-5 |
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