Wellbore Temperature and Pressure Field in Deep-water Drilling and the Applications in Prediction of Hydrate Formation Region
In the process of deep-water drilling, gas hydrate is easily formed in wellbores due to the low temperature and high pressure environment. In this study, a new, systematic, and accurate prediction method of temperature, pressure, and hydrate formation region in wellbores is developed. The mathematic...
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Frontiers Media S.A.
2021-06-01
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| Series: | Frontiers in Energy Research |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fenrg.2021.696392/full |
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doaj-227c746f6c1743d0b33b53c4293d97462021-06-29T15:07:01ZengFrontiers Media S.A.Frontiers in Energy Research2296-598X2021-06-01910.3389/fenrg.2021.696392696392Wellbore Temperature and Pressure Field in Deep-water Drilling and the Applications in Prediction of Hydrate Formation RegionWantong Sun0Wantong Sun1Na Wei2Na Wei3Jinzhou Zhao4Jinzhou Zhao5Shouwei Zhou6Shouwei Zhou7Liehui Zhang8Liehui Zhang9Qingping Li10Qingping Li11Lin Jiang12Yao Zhang13Yao Zhang14Haitao Li15Haitao Li16Hanming Xu17Cong Li18Xuncheng Shen19Chenyang Xiong20State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, ChinaState Key Laboratory of Natural Gas Hydrate, Beijing, ChinaState Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, ChinaState Key Laboratory of Natural Gas Hydrate, Beijing, ChinaState Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, ChinaState Key Laboratory of Natural Gas Hydrate, Beijing, ChinaState Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, ChinaState Key Laboratory of Natural Gas Hydrate, Beijing, ChinaState Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, ChinaState Key Laboratory of Natural Gas Hydrate, Beijing, ChinaState Key Laboratory of Natural Gas Hydrate, Beijing, ChinaCNOOC Research Institutes Limited Liability Company, Beijing, ChinaState Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, ChinaState Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, ChinaState Key Laboratory of Natural Gas Hydrate, Beijing, ChinaState Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, ChinaState Key Laboratory of Natural Gas Hydrate, Beijing, ChinaState Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, ChinaState Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, ChinaState Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, ChinaState Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, ChinaIn the process of deep-water drilling, gas hydrate is easily formed in wellbores due to the low temperature and high pressure environment. In this study, a new, systematic, and accurate prediction method of temperature, pressure, and hydrate formation region in wellbores is developed. The mathematical models of wellbore pressure and transient heat transfer are established, the numerical solution method based on fully implicit finite difference method is developed, and the accuracy is verified by comparing with the field measured data. Combined with the hydrate phase equilibrium model, the hydrate formation region in wellbore is predicted, and the sensitivity effects of nine factors on wellbore temperature, pressure, and hydrate formation region are analyzed. Finally, the influence regularities and degree of each parameter are obtained. The increases of circulation time, geothermal gradient, displacement of drilling fluid, and injection temperature will inhibit the formation of hydrate in wellbores, and the influence degree increases in turn; the increases of wellhead backpressure and seawater depth will promote the formation of hydrate in wellbores, and the influence degree increases in turn. The changes of drilling fluid density, well depth, and hole deviation angle have little effect on the formation of hydrate in wellbores.https://www.frontiersin.org/articles/10.3389/fenrg.2021.696392/fulltemperaturepressurehydrateformation regionnumerical calculationdeep-water drilling |
| collection |
DOAJ |
| language |
English |
| format |
Article |
| sources |
DOAJ |
| author |
Wantong Sun Wantong Sun Na Wei Na Wei Jinzhou Zhao Jinzhou Zhao Shouwei Zhou Shouwei Zhou Liehui Zhang Liehui Zhang Qingping Li Qingping Li Lin Jiang Yao Zhang Yao Zhang Haitao Li Haitao Li Hanming Xu Cong Li Xuncheng Shen Chenyang Xiong |
| spellingShingle |
Wantong Sun Wantong Sun Na Wei Na Wei Jinzhou Zhao Jinzhou Zhao Shouwei Zhou Shouwei Zhou Liehui Zhang Liehui Zhang Qingping Li Qingping Li Lin Jiang Yao Zhang Yao Zhang Haitao Li Haitao Li Hanming Xu Cong Li Xuncheng Shen Chenyang Xiong Wellbore Temperature and Pressure Field in Deep-water Drilling and the Applications in Prediction of Hydrate Formation Region Frontiers in Energy Research temperature pressure hydrate formation region numerical calculation deep-water drilling |
| author_facet |
Wantong Sun Wantong Sun Na Wei Na Wei Jinzhou Zhao Jinzhou Zhao Shouwei Zhou Shouwei Zhou Liehui Zhang Liehui Zhang Qingping Li Qingping Li Lin Jiang Yao Zhang Yao Zhang Haitao Li Haitao Li Hanming Xu Cong Li Xuncheng Shen Chenyang Xiong |
| author_sort |
Wantong Sun |
| title |
Wellbore Temperature and Pressure Field in Deep-water Drilling and the Applications in Prediction of Hydrate Formation Region |
| title_short |
Wellbore Temperature and Pressure Field in Deep-water Drilling and the Applications in Prediction of Hydrate Formation Region |
| title_full |
Wellbore Temperature and Pressure Field in Deep-water Drilling and the Applications in Prediction of Hydrate Formation Region |
| title_fullStr |
Wellbore Temperature and Pressure Field in Deep-water Drilling and the Applications in Prediction of Hydrate Formation Region |
| title_full_unstemmed |
Wellbore Temperature and Pressure Field in Deep-water Drilling and the Applications in Prediction of Hydrate Formation Region |
| title_sort |
wellbore temperature and pressure field in deep-water drilling and the applications in prediction of hydrate formation region |
| publisher |
Frontiers Media S.A. |
| series |
Frontiers in Energy Research |
| issn |
2296-598X |
| publishDate |
2021-06-01 |
| description |
In the process of deep-water drilling, gas hydrate is easily formed in wellbores due to the low temperature and high pressure environment. In this study, a new, systematic, and accurate prediction method of temperature, pressure, and hydrate formation region in wellbores is developed. The mathematical models of wellbore pressure and transient heat transfer are established, the numerical solution method based on fully implicit finite difference method is developed, and the accuracy is verified by comparing with the field measured data. Combined with the hydrate phase equilibrium model, the hydrate formation region in wellbore is predicted, and the sensitivity effects of nine factors on wellbore temperature, pressure, and hydrate formation region are analyzed. Finally, the influence regularities and degree of each parameter are obtained. The increases of circulation time, geothermal gradient, displacement of drilling fluid, and injection temperature will inhibit the formation of hydrate in wellbores, and the influence degree increases in turn; the increases of wellhead backpressure and seawater depth will promote the formation of hydrate in wellbores, and the influence degree increases in turn. The changes of drilling fluid density, well depth, and hole deviation angle have little effect on the formation of hydrate in wellbores. |
| topic |
temperature pressure hydrate formation region numerical calculation deep-water drilling |
| url |
https://www.frontiersin.org/articles/10.3389/fenrg.2021.696392/full |
| work_keys_str_mv |
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