Flaky cuttings bed distribution model in a shale gas horizontal well based on experiment and numerical simulation
During the drilling of shale gas wells, the shape of shale cuttings cut by polycrystalline diamond compact bits has an obvious flaky structure. The accumulation of such flaky cuttings is one of the main reasons for high drilling torque and drag and serious back pressure, which affect the drilling sp...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
SAGE Publishing
2023-01-01
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| Series: | Energy Exploration & Exploitation |
| Online Access: | https://doi.org/10.1177/01445987221115812 |
| _version_ | 1811185577879404544 |
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| author | Dong Xiao Weixiong Chen Hu Deng Jichuan Zhang Mubai Duan Jiaxin Xu Pan Fang Wenyong Shen Gao Li |
| author_facet | Dong Xiao Weixiong Chen Hu Deng Jichuan Zhang Mubai Duan Jiaxin Xu Pan Fang Wenyong Shen Gao Li |
| author_sort | Dong Xiao |
| collection | DOAJ |
| description | During the drilling of shale gas wells, the shape of shale cuttings cut by polycrystalline diamond compact bits has an obvious flaky structure. The accumulation of such flaky cuttings is one of the main reasons for high drilling torque and drag and serious back pressure, which affect the drilling speed of the horizontal section of shale gas wells. Therefore, predicting the thickness of the flaky cuttings bed and restraining it are essential for ensuring safe and efficient drilling of the horizontal section of shale gas wells. However, most of the previous research on migration laws for cuttings were based on spherical particles, which affected the accuracy of cuttings bed thickness prediction. In this study, through visualization experiments combined with computational fluid dynamics numerical simulation, the hole cleaning laws of shale gas wells in the long horizontal section were studied, and a set of cuttings bed thickness prediction models and cuttings bed removal process parameter optimization methods were established. Field application was conducted in the Changning 209H24-1 well in the southern Sichuan Basin, China. The results revealed the following: (1) There are significant differences in the migration laws of flaky cuttings and spherical cuttings in the horizontal section. (2) The fitting accuracy of the established long horizontal fragmentation layer distribution model considering multiple factors and the experimental data is as high as 0.973. (3) Based on this model, the drilling parameters of the Changning 209H24-1 well were optimized, which played a good role in wellbore cleaning and ensured the safe and smooth implementation of the later casing operation. |
| first_indexed | 2024-04-11T13:32:44Z |
| format | Article |
| id | doaj.art-efb76d4eb622489f94a96a4d0b61cb8c |
| institution | Directory Open Access Journal |
| issn | 0144-5987 2048-4054 |
| language | English |
| last_indexed | 2024-04-11T13:32:44Z |
| publishDate | 2023-01-01 |
| publisher | SAGE Publishing |
| record_format | Article |
| series | Energy Exploration & Exploitation |
| spelling | doaj.art-efb76d4eb622489f94a96a4d0b61cb8c2022-12-22T04:21:47ZengSAGE PublishingEnergy Exploration & Exploitation0144-59872048-40542023-01-014110.1177/01445987221115812Flaky cuttings bed distribution model in a shale gas horizontal well based on experiment and numerical simulationDong Xiao0Weixiong Chen1Hu Deng2Jichuan Zhang3Mubai Duan4Jiaxin Xu5Pan Fang6Wenyong Shen7Gao Li8 State Key Lab of Oil and Gas Reservoir Geology and Exploitation, , Chengdu 610500, People's Republic of China State Key Lab of Oil and Gas Reservoir Geology and Exploitation, , Chengdu 610500, People's Republic of China , Guanghan 613800, People's Republic of China , Guanghan 613800, People's Republic of China , Guanghan 613800, People's Republic of China State Key Lab of Oil and Gas Reservoir Geology and Exploitation, , Chengdu 610500, People's Republic of China State Key Lab of Oil and Gas Reservoir Geology and Exploitation, , Chengdu 610500, People's Republic of China State Key Lab of Oil and Gas Reservoir Geology and Exploitation, , Chengdu 610500, People's Republic of China State Key Lab of Oil and Gas Reservoir Geology and Exploitation, , Chengdu 610500, People's Republic of ChinaDuring the drilling of shale gas wells, the shape of shale cuttings cut by polycrystalline diamond compact bits has an obvious flaky structure. The accumulation of such flaky cuttings is one of the main reasons for high drilling torque and drag and serious back pressure, which affect the drilling speed of the horizontal section of shale gas wells. Therefore, predicting the thickness of the flaky cuttings bed and restraining it are essential for ensuring safe and efficient drilling of the horizontal section of shale gas wells. However, most of the previous research on migration laws for cuttings were based on spherical particles, which affected the accuracy of cuttings bed thickness prediction. In this study, through visualization experiments combined with computational fluid dynamics numerical simulation, the hole cleaning laws of shale gas wells in the long horizontal section were studied, and a set of cuttings bed thickness prediction models and cuttings bed removal process parameter optimization methods were established. Field application was conducted in the Changning 209H24-1 well in the southern Sichuan Basin, China. The results revealed the following: (1) There are significant differences in the migration laws of flaky cuttings and spherical cuttings in the horizontal section. (2) The fitting accuracy of the established long horizontal fragmentation layer distribution model considering multiple factors and the experimental data is as high as 0.973. (3) Based on this model, the drilling parameters of the Changning 209H24-1 well were optimized, which played a good role in wellbore cleaning and ensured the safe and smooth implementation of the later casing operation.https://doi.org/10.1177/01445987221115812 |
| spellingShingle | Dong Xiao Weixiong Chen Hu Deng Jichuan Zhang Mubai Duan Jiaxin Xu Pan Fang Wenyong Shen Gao Li Flaky cuttings bed distribution model in a shale gas horizontal well based on experiment and numerical simulation Energy Exploration & Exploitation |
| title | Flaky cuttings bed distribution model in a shale gas horizontal well based on experiment and numerical simulation |
| title_full | Flaky cuttings bed distribution model in a shale gas horizontal well based on experiment and numerical simulation |
| title_fullStr | Flaky cuttings bed distribution model in a shale gas horizontal well based on experiment and numerical simulation |
| title_full_unstemmed | Flaky cuttings bed distribution model in a shale gas horizontal well based on experiment and numerical simulation |
| title_short | Flaky cuttings bed distribution model in a shale gas horizontal well based on experiment and numerical simulation |
| title_sort | flaky cuttings bed distribution model in a shale gas horizontal well based on experiment and numerical simulation |
| url | https://doi.org/10.1177/01445987221115812 |
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