Fluid Flow Simulation for Predicting Bottomhole Pressure That Considers Wellbore Storage Effects Under Shut-In Conditions in Deepwater Drilling
Under shut-in conditions in deepwater drilling, the gas invading the bottomhole ascends along the wellbore and accumulates at the wellhead, forming a high-pressure trap, challenging wellbore pressure prediction and control. The accurate prediction of bottomhole pressure is essential for well control...
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MDPI AG
2024-12-01
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| Series: | Journal of Marine Science and Engineering |
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| Online Access: | https://www.mdpi.com/2077-1312/13/1/22 |
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| author | Yanli Guo Yonghai Gao Qingtao Gong Lifen Hu Yongyi Jiang Baojiang Sun |
| author_facet | Yanli Guo Yonghai Gao Qingtao Gong Lifen Hu Yongyi Jiang Baojiang Sun |
| author_sort | Yanli Guo |
| collection | DOAJ |
| description | Under shut-in conditions in deepwater drilling, the gas invading the bottomhole ascends along the wellbore and accumulates at the wellhead, forming a high-pressure trap, challenging wellbore pressure prediction and control. The accurate prediction of bottomhole pressure is essential for well control during shut-in conditions. In this study, a new bottomhole pressure prediction model that considers wellbore storage effects was developed to address gas invasion issues during shut-in conditions in deepwater drilling. This model incorporates factors such as the wellbore elasticity, fluid compressibility, and drilling fluid filtration loss. The calculated values show good agreement with experimental values, with the average absolute and relative errors of 2.095 × 10<sup>−2</sup> MPa and 3.71%, respectively. Meanwhile, the results indicate that the bottomhole pressure initially increases logarithmically over time and then transitions to a linear increase, and the residual flow and gas ascent significantly influence the bottomhole pressure. Finally, the effects of various parameters on the bottomhole pressure were evaluated. Larger initial pressure differential, exposed thickness, and formation permeability accelerate the increase in bottomhole pressure during residual flow stage, while smaller filter cake permeability and drilling fluid viscosity quicken its increase during gas ascent stage. Drilling fluid density affects the initial pressure and the residual flow duration. The findings of this study would provide theoretical support for well control operations in deepwater drilling. |
| format | Article |
| id | doaj-art-092393a4aca74d618798dd46ceb9b1a0 |
| institution | Kabale University |
| issn | 2077-1312 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Marine Science and Engineering |
| spelling | doaj-art-092393a4aca74d618798dd46ceb9b1a02025-01-24T13:36:34ZengMDPI AGJournal of Marine Science and Engineering2077-13122024-12-011312210.3390/jmse13010022Fluid Flow Simulation for Predicting Bottomhole Pressure That Considers Wellbore Storage Effects Under Shut-In Conditions in Deepwater DrillingYanli Guo0Yonghai Gao1Qingtao Gong2Lifen Hu3Yongyi Jiang4Baojiang Sun5Ulsan Ship and Ocean College, Ludong University, Yantai 264025, ChinaSchool of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, ChinaUlsan Ship and Ocean College, Ludong University, Yantai 264025, ChinaUlsan Ship and Ocean College, Ludong University, Yantai 264025, ChinaUlsan Ship and Ocean College, Ludong University, Yantai 264025, ChinaSchool of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, ChinaUnder shut-in conditions in deepwater drilling, the gas invading the bottomhole ascends along the wellbore and accumulates at the wellhead, forming a high-pressure trap, challenging wellbore pressure prediction and control. The accurate prediction of bottomhole pressure is essential for well control during shut-in conditions. In this study, a new bottomhole pressure prediction model that considers wellbore storage effects was developed to address gas invasion issues during shut-in conditions in deepwater drilling. This model incorporates factors such as the wellbore elasticity, fluid compressibility, and drilling fluid filtration loss. The calculated values show good agreement with experimental values, with the average absolute and relative errors of 2.095 × 10<sup>−2</sup> MPa and 3.71%, respectively. Meanwhile, the results indicate that the bottomhole pressure initially increases logarithmically over time and then transitions to a linear increase, and the residual flow and gas ascent significantly influence the bottomhole pressure. Finally, the effects of various parameters on the bottomhole pressure were evaluated. Larger initial pressure differential, exposed thickness, and formation permeability accelerate the increase in bottomhole pressure during residual flow stage, while smaller filter cake permeability and drilling fluid viscosity quicken its increase during gas ascent stage. Drilling fluid density affects the initial pressure and the residual flow duration. The findings of this study would provide theoretical support for well control operations in deepwater drilling.https://www.mdpi.com/2077-1312/13/1/22bottomhole pressurewellbore storage effectshut-insensitivity analysisdeepwater drilling |
| spellingShingle | Yanli Guo Yonghai Gao Qingtao Gong Lifen Hu Yongyi Jiang Baojiang Sun Fluid Flow Simulation for Predicting Bottomhole Pressure That Considers Wellbore Storage Effects Under Shut-In Conditions in Deepwater Drilling Journal of Marine Science and Engineering bottomhole pressure wellbore storage effect shut-in sensitivity analysis deepwater drilling |
| title | Fluid Flow Simulation for Predicting Bottomhole Pressure That Considers Wellbore Storage Effects Under Shut-In Conditions in Deepwater Drilling |
| title_full | Fluid Flow Simulation for Predicting Bottomhole Pressure That Considers Wellbore Storage Effects Under Shut-In Conditions in Deepwater Drilling |
| title_fullStr | Fluid Flow Simulation for Predicting Bottomhole Pressure That Considers Wellbore Storage Effects Under Shut-In Conditions in Deepwater Drilling |
| title_full_unstemmed | Fluid Flow Simulation for Predicting Bottomhole Pressure That Considers Wellbore Storage Effects Under Shut-In Conditions in Deepwater Drilling |
| title_short | Fluid Flow Simulation for Predicting Bottomhole Pressure That Considers Wellbore Storage Effects Under Shut-In Conditions in Deepwater Drilling |
| title_sort | fluid flow simulation for predicting bottomhole pressure that considers wellbore storage effects under shut in conditions in deepwater drilling |
| topic | bottomhole pressure wellbore storage effect shut-in sensitivity analysis deepwater drilling |
| url | https://www.mdpi.com/2077-1312/13/1/22 |
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