Numerical simulation on the effect of drilling engineering factors on coal fines output in coalbed methane horizontal wells: a case study of Liulin block
The coal fines output is the key factor restricting the development of coalbed methane.Factors affecting coal fines output include static factors and dynamic factors.Drilling engineering is one of the important dynamic factors affecting coal fines output.Taking Liulin coalbed methane block as an exa...
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| Format: | Article |
| Language: | English |
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Emergency Management Press
2022-12-01
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| Series: | 矿业科学学报 |
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| Online Access: | http://kykxxb.cumtb.edu.cn/cn/article/doi/10.19606/j.cnki.jmst.2022.06.004 |
| _version_ | 1811247795077644288 |
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| author | Wei Yingchun Wang Yadong Zhang Jin Wang Anmin Meng Tao |
| author_facet | Wei Yingchun Wang Yadong Zhang Jin Wang Anmin Meng Tao |
| author_sort | Wei Yingchun |
| collection | DOAJ |
| description | The coal fines output is the key factor restricting the development of coalbed methane.Factors affecting coal fines output include static factors and dynamic factors.Drilling engineering is one of the important dynamic factors affecting coal fines output.Taking Liulin coalbed methane block as an example, this study established 2D and 3D models by ANSYS software from the perspective of the wellbore stability, and simulated the force and deformation of the borehole wall under different drilling orientations, drilling fluid density, wellbore size, and wellbore inclination.The influence of factors in drilling engineering on the coal fines production was analyzed for the coalbed methane horizontal well.Results show that borehole size and inclination on coal fines production exert greater effect than borehole orientation and drilling fluid density.When the borehole orientation is along the direction of the maximum horizontal in-situ stress, it demonstrates the biggest difference in the equivalent stress around the borehole, and the most obvious stress concentration.Excessive density drilling fluid will lead to tensile failure of the wellbore.In the process of horizontal well drilling, the larger the radius of the wellbore and the larger the inclination of the well, the easier it is to generate coal fines.In order to reduce the generation of coal fines caused by drilling factors, it is suggested that when drilling horizontal wells in the study area, the borehole orientation should be along the direction of the minimum horizontal in-situ stress, the horizontal section should be drilled with clear water, and the inclination of the horizontal section should be consistent with the inclination of the coal seam.The research results provide a theoretical basis for the control measures of coal fines. |
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| institution | Directory Open Access Journal |
| issn | 2096-2193 |
| language | English |
| last_indexed | 2024-04-12T15:15:45Z |
| publishDate | 2022-12-01 |
| publisher | Emergency Management Press |
| record_format | Article |
| series | 矿业科学学报 |
| spelling | doaj.art-e42208dff868400797f2e6b3cfcc56422022-12-22T03:27:37ZengEmergency Management Press矿业科学学报2096-21932022-12-017667067910.19606/j.cnki.jmst.2022.06.00420220604Numerical simulation on the effect of drilling engineering factors on coal fines output in coalbed methane horizontal wells: a case study of Liulin blockWei Yingchun0Wang Yadong1Zhang Jin2Wang Anmin3Meng Tao4College of Geosciences and Surveying Engineering, China University of Mining and Technology-Beijing, Beijing 100083, ChinaCollege of Geosciences and Surveying Engineering, China University of Mining and Technology-Beijing, Beijing 100083, ChinaCollege of Geosciences and Surveying Engineering, China University of Mining and Technology-Beijing, Beijing 100083, ChinaCollege of Geosciences and Surveying Engineering, China University of Mining and Technology-Beijing, Beijing 100083, ChinaCollege of Geosciences and Surveying Engineering, China University of Mining and Technology-Beijing, Beijing 100083, ChinaThe coal fines output is the key factor restricting the development of coalbed methane.Factors affecting coal fines output include static factors and dynamic factors.Drilling engineering is one of the important dynamic factors affecting coal fines output.Taking Liulin coalbed methane block as an example, this study established 2D and 3D models by ANSYS software from the perspective of the wellbore stability, and simulated the force and deformation of the borehole wall under different drilling orientations, drilling fluid density, wellbore size, and wellbore inclination.The influence of factors in drilling engineering on the coal fines production was analyzed for the coalbed methane horizontal well.Results show that borehole size and inclination on coal fines production exert greater effect than borehole orientation and drilling fluid density.When the borehole orientation is along the direction of the maximum horizontal in-situ stress, it demonstrates the biggest difference in the equivalent stress around the borehole, and the most obvious stress concentration.Excessive density drilling fluid will lead to tensile failure of the wellbore.In the process of horizontal well drilling, the larger the radius of the wellbore and the larger the inclination of the well, the easier it is to generate coal fines.In order to reduce the generation of coal fines caused by drilling factors, it is suggested that when drilling horizontal wells in the study area, the borehole orientation should be along the direction of the minimum horizontal in-situ stress, the horizontal section should be drilled with clear water, and the inclination of the horizontal section should be consistent with the inclination of the coal seam.The research results provide a theoretical basis for the control measures of coal fines.http://kykxxb.cumtb.edu.cn/cn/article/doi/10.19606/j.cnki.jmst.2022.06.004coalbed methane horizontal wellsdrilling engineeringcoal fineswellbore stabilitynumerical simulation |
| spellingShingle | Wei Yingchun Wang Yadong Zhang Jin Wang Anmin Meng Tao Numerical simulation on the effect of drilling engineering factors on coal fines output in coalbed methane horizontal wells: a case study of Liulin block 矿业科学学报 coalbed methane horizontal wells drilling engineering coal fines wellbore stability numerical simulation |
| title | Numerical simulation on the effect of drilling engineering factors on coal fines output in coalbed methane horizontal wells: a case study of Liulin block |
| title_full | Numerical simulation on the effect of drilling engineering factors on coal fines output in coalbed methane horizontal wells: a case study of Liulin block |
| title_fullStr | Numerical simulation on the effect of drilling engineering factors on coal fines output in coalbed methane horizontal wells: a case study of Liulin block |
| title_full_unstemmed | Numerical simulation on the effect of drilling engineering factors on coal fines output in coalbed methane horizontal wells: a case study of Liulin block |
| title_short | Numerical simulation on the effect of drilling engineering factors on coal fines output in coalbed methane horizontal wells: a case study of Liulin block |
| title_sort | numerical simulation on the effect of drilling engineering factors on coal fines output in coalbed methane horizontal wells a case study of liulin block |
| topic | coalbed methane horizontal wells drilling engineering coal fines wellbore stability numerical simulation |
| url | http://kykxxb.cumtb.edu.cn/cn/article/doi/10.19606/j.cnki.jmst.2022.06.004 |
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