Microannulus Formation Mechanism at the Cementing Interface of a Thermal Recovery Well during Cyclic Steam Injection
During the thermal recovery of heavy oil when using cyclic steam injection technology, a microannulus tends to form at the cementing interface subjected to high temperature and pressure during steam injection, and large temperature and pressure differences after injection can lead to wellbore integr...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2020/8217013 |
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| _version_ | 1832566318402895872 |
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| author | JiWei Wu XueGang Wang Lin Song ShouMing Zhong WenFeng Yin |
| author_facet | JiWei Wu XueGang Wang Lin Song ShouMing Zhong WenFeng Yin |
| author_sort | JiWei Wu |
| collection | DOAJ |
| description | During the thermal recovery of heavy oil when using cyclic steam injection technology, a microannulus tends to form at the cementing interface subjected to high temperature and pressure during steam injection, and large temperature and pressure differences after injection can lead to wellbore integrity failure. In this study, a thermomechanical coupled finite element casing-cement-formation model of a thermal recovery wellbore is established. The deformation of the wellbore during both the steam injection stage and the steam shutdown stage is analyzed. The microannulus formation mechanism at the cementing interface of the wellbore is studied. During steam injection, under the large thermomechanical coupling load, the wellbore generates a high stress that leads to elastic-plastic deformation. In the steam shutdown stage, with the load on the wellbore decreasing, elastic deformation recovers mostly, while plastic deformation continues. If the plastic deformation is large enough, a microannulus will form at the cementing interface. Increasing the elastic moduli of the casing, cement, and the formation can enlarge their plastic deformation during steam injection. The increase of plastic deformation of the cement or formation can enlarge the microannulus of the casing-cement interface or the cement-formation interface correspondingly in the steam shutdown stage. |
| format | Article |
| id | doaj-art-0be79e8af73746b8ab99781c7277d705 |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-0be79e8af73746b8ab99781c7277d7052025-02-03T01:04:20ZengWileyAdvances in Civil Engineering1687-80861687-80942020-01-01202010.1155/2020/82170138217013Microannulus Formation Mechanism at the Cementing Interface of a Thermal Recovery Well during Cyclic Steam InjectionJiWei Wu0XueGang Wang1Lin Song2ShouMing Zhong3WenFeng Yin4Engineering Technology Research Institute of Xinjiang Oilfield Company, Karamay 834000, ChinaEngineering Technology Research Institute of Xinjiang Oilfield Company, Karamay 834000, ChinaEngineering Technology Research Institute of Xinjiang Oilfield Company, Karamay 834000, ChinaEngineering Technology Research Institute of Xinjiang Oilfield Company, Karamay 834000, ChinaPetroleum Engineering School of Southwest Petroleum University, Chengdu 610500, ChinaDuring the thermal recovery of heavy oil when using cyclic steam injection technology, a microannulus tends to form at the cementing interface subjected to high temperature and pressure during steam injection, and large temperature and pressure differences after injection can lead to wellbore integrity failure. In this study, a thermomechanical coupled finite element casing-cement-formation model of a thermal recovery wellbore is established. The deformation of the wellbore during both the steam injection stage and the steam shutdown stage is analyzed. The microannulus formation mechanism at the cementing interface of the wellbore is studied. During steam injection, under the large thermomechanical coupling load, the wellbore generates a high stress that leads to elastic-plastic deformation. In the steam shutdown stage, with the load on the wellbore decreasing, elastic deformation recovers mostly, while plastic deformation continues. If the plastic deformation is large enough, a microannulus will form at the cementing interface. Increasing the elastic moduli of the casing, cement, and the formation can enlarge their plastic deformation during steam injection. The increase of plastic deformation of the cement or formation can enlarge the microannulus of the casing-cement interface or the cement-formation interface correspondingly in the steam shutdown stage.http://dx.doi.org/10.1155/2020/8217013 |
| spellingShingle | JiWei Wu XueGang Wang Lin Song ShouMing Zhong WenFeng Yin Microannulus Formation Mechanism at the Cementing Interface of a Thermal Recovery Well during Cyclic Steam Injection Advances in Civil Engineering |
| title | Microannulus Formation Mechanism at the Cementing Interface of a Thermal Recovery Well during Cyclic Steam Injection |
| title_full | Microannulus Formation Mechanism at the Cementing Interface of a Thermal Recovery Well during Cyclic Steam Injection |
| title_fullStr | Microannulus Formation Mechanism at the Cementing Interface of a Thermal Recovery Well during Cyclic Steam Injection |
| title_full_unstemmed | Microannulus Formation Mechanism at the Cementing Interface of a Thermal Recovery Well during Cyclic Steam Injection |
| title_short | Microannulus Formation Mechanism at the Cementing Interface of a Thermal Recovery Well during Cyclic Steam Injection |
| title_sort | microannulus formation mechanism at the cementing interface of a thermal recovery well during cyclic steam injection |
| url | http://dx.doi.org/10.1155/2020/8217013 |
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