Problems in the wellbore integrity of a shale gas horizontal well and corresponding countermeasures
In the Changning–Weiyuan national shale gas demonstration area, SW Sichuan Basin, the wellbore integrity damage occurs in some shale gas wells and has direct effect on the gas production rate of single shale gas horizontal well. After statistics analysis was performed on the problems related with we...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2015-12-01
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| Series: | Natural Gas Industry B |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352854016000255 |
| _version_ | 1797283793434836992 |
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| author | Zhonglan Tian Lin Shi Lei Qiao |
| author_facet | Zhonglan Tian Lin Shi Lei Qiao |
| author_sort | Zhonglan Tian |
| collection | DOAJ |
| description | In the Changning–Weiyuan national shale gas demonstration area, SW Sichuan Basin, the wellbore integrity damage occurs in some shale gas wells and has direct effect on the gas production rate of single shale gas horizontal well. After statistics analysis was performed on the problems related with wellbore integrity, such as casing damage, casing running difficulty and cement sheath blow-by, the multi-factor coupling casing stress calculation and evaluation mode laws established. Then study was conducted on the influential mechanism of multi-factor coupling (temperature effect, casing bending and axial pressure) on casing damage. The shale slip mechanism and its relationship with casing sheared formation were analyzed by using the Mohr–Coulomb criterion. Inversion analysis was performed on the main controlling factors of casing friction by using the developed casing hook load prediction and friction analysis software. And finally, based on the characteristics of shale gas horizontal wells, wellbore integrity control measures were proposed in terms of design and construction process, so as to improve the drilling quality (DQ). More specifically, shale gas well casing design calculation method and check standard were modified, well structure and full bore hole trajectory design were optimized, drilling quality was improved, cement properties were optimized and cement sealing integrity during fracturing process was checked. These research findings are significant in the design and management of future shale gas borehole integrity. |
| first_indexed | 2024-03-07T17:36:57Z |
| format | Article |
| id | doaj.art-528d288b2213444bb191484c8dc907bf |
| institution | Directory Open Access Journal |
| issn | 2352-8540 |
| language | English |
| last_indexed | 2024-03-07T17:36:57Z |
| publishDate | 2015-12-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Natural Gas Industry B |
| spelling | doaj.art-528d288b2213444bb191484c8dc907bf2024-03-02T16:44:24ZengKeAi Communications Co., Ltd.Natural Gas Industry B2352-85402015-12-012652252910.1016/j.ngib.2015.12.006Problems in the wellbore integrity of a shale gas horizontal well and corresponding countermeasuresZhonglan TianLin ShiLei QiaoIn the Changning–Weiyuan national shale gas demonstration area, SW Sichuan Basin, the wellbore integrity damage occurs in some shale gas wells and has direct effect on the gas production rate of single shale gas horizontal well. After statistics analysis was performed on the problems related with wellbore integrity, such as casing damage, casing running difficulty and cement sheath blow-by, the multi-factor coupling casing stress calculation and evaluation mode laws established. Then study was conducted on the influential mechanism of multi-factor coupling (temperature effect, casing bending and axial pressure) on casing damage. The shale slip mechanism and its relationship with casing sheared formation were analyzed by using the Mohr–Coulomb criterion. Inversion analysis was performed on the main controlling factors of casing friction by using the developed casing hook load prediction and friction analysis software. And finally, based on the characteristics of shale gas horizontal wells, wellbore integrity control measures were proposed in terms of design and construction process, so as to improve the drilling quality (DQ). More specifically, shale gas well casing design calculation method and check standard were modified, well structure and full bore hole trajectory design were optimized, drilling quality was improved, cement properties were optimized and cement sealing integrity during fracturing process was checked. These research findings are significant in the design and management of future shale gas borehole integrity.http://www.sciencedirect.com/science/article/pii/S2352854016000255Shale gasWellbore integrityCasing damageShale slipDrilling quality (DQ)Sichuan BasinChangning–WeiyuanNational shale gas demonstration area |
| spellingShingle | Zhonglan Tian Lin Shi Lei Qiao Problems in the wellbore integrity of a shale gas horizontal well and corresponding countermeasures Natural Gas Industry B Shale gas Wellbore integrity Casing damage Shale slip Drilling quality (DQ) Sichuan Basin Changning–Weiyuan National shale gas demonstration area |
| title | Problems in the wellbore integrity of a shale gas horizontal well and corresponding countermeasures |
| title_full | Problems in the wellbore integrity of a shale gas horizontal well and corresponding countermeasures |
| title_fullStr | Problems in the wellbore integrity of a shale gas horizontal well and corresponding countermeasures |
| title_full_unstemmed | Problems in the wellbore integrity of a shale gas horizontal well and corresponding countermeasures |
| title_short | Problems in the wellbore integrity of a shale gas horizontal well and corresponding countermeasures |
| title_sort | problems in the wellbore integrity of a shale gas horizontal well and corresponding countermeasures |
| topic | Shale gas Wellbore integrity Casing damage Shale slip Drilling quality (DQ) Sichuan Basin Changning–Weiyuan National shale gas demonstration area |
| url | http://www.sciencedirect.com/science/article/pii/S2352854016000255 |
| work_keys_str_mv | AT zhonglantian problemsinthewellboreintegrityofashalegashorizontalwellandcorrespondingcountermeasures AT linshi problemsinthewellboreintegrityofashalegashorizontalwellandcorrespondingcountermeasures AT leiqiao problemsinthewellboreintegrityofashalegashorizontalwellandcorrespondingcountermeasures |