Alkali Solution Erodes Shale: Influencing Factors and Structural Damage Characteristics
High-pH drilling fluids are often used for drilling shale gas wells. Alkali erosion of shale is one of the important factors of wellbore instability. Alkali erosion experiments of different kinds of minerals and shale were conducted in this paper. Experimental results show that the corrosion rate of...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2018-01-01
|
| Series: | Journal of Chemistry |
| Online Access: | http://dx.doi.org/10.1155/2018/3641627 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849307828713422848 |
|---|---|
| author | Jiping She Hao Zhang Ying Zhong Yang Yuan Jiachun You |
| author_facet | Jiping She Hao Zhang Ying Zhong Yang Yuan Jiachun You |
| author_sort | Jiping She |
| collection | DOAJ |
| description | High-pH drilling fluids are often used for drilling shale gas wells. Alkali erosion of shale is one of the important factors of wellbore instability. Alkali erosion experiments of different kinds of minerals and shale were conducted in this paper. Experimental results show that the corrosion rate of kaolinite is the highest when the pH is 9, the corrosion rate of smectite is the highest when the pH is 10 or 11, and the corrosion rate of the quartz is the highest when the pH is 12. Both shale particle size and concentration of hydroxide ion all affect the reaction rate, and the former has a negative correlation with the reaction rate, and the latter has a positive correlation with the reaction rate. In addition, alkaline erosion can lead to the fracture propagation along the bedding planes of shale, which can easily result in wellbore instability. This study may offer some theoretical basis for wellbore instability induced by high-pH drilling fluids. |
| format | Article |
| id | doaj-art-2a0ae99953c943e8b9d39bcc2bd1ca04 |
| institution | Kabale University |
| issn | 2090-9063 2090-9071 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Chemistry |
| spelling | doaj-art-2a0ae99953c943e8b9d39bcc2bd1ca042025-08-20T03:54:37ZengWileyJournal of Chemistry2090-90632090-90712018-01-01201810.1155/2018/36416273641627Alkali Solution Erodes Shale: Influencing Factors and Structural Damage CharacteristicsJiping She0Hao Zhang1Ying Zhong2Yang Yuan3Jiachun You4College of Energy, Chengdu University of Technology, Chengdu, Sichuan 610059, ChinaCollege of Energy, Chengdu University of Technology, Chengdu, Sichuan 610059, ChinaCollege of Energy, Chengdu University of Technology, Chengdu, Sichuan 610059, ChinaCollege of Energy, Chengdu University of Technology, Chengdu, Sichuan 610059, ChinaCollege of Energy, Chengdu University of Technology, Chengdu, Sichuan 610059, ChinaHigh-pH drilling fluids are often used for drilling shale gas wells. Alkali erosion of shale is one of the important factors of wellbore instability. Alkali erosion experiments of different kinds of minerals and shale were conducted in this paper. Experimental results show that the corrosion rate of kaolinite is the highest when the pH is 9, the corrosion rate of smectite is the highest when the pH is 10 or 11, and the corrosion rate of the quartz is the highest when the pH is 12. Both shale particle size and concentration of hydroxide ion all affect the reaction rate, and the former has a negative correlation with the reaction rate, and the latter has a positive correlation with the reaction rate. In addition, alkaline erosion can lead to the fracture propagation along the bedding planes of shale, which can easily result in wellbore instability. This study may offer some theoretical basis for wellbore instability induced by high-pH drilling fluids.http://dx.doi.org/10.1155/2018/3641627 |
| spellingShingle | Jiping She Hao Zhang Ying Zhong Yang Yuan Jiachun You Alkali Solution Erodes Shale: Influencing Factors and Structural Damage Characteristics Journal of Chemistry |
| title | Alkali Solution Erodes Shale: Influencing Factors and Structural Damage Characteristics |
| title_full | Alkali Solution Erodes Shale: Influencing Factors and Structural Damage Characteristics |
| title_fullStr | Alkali Solution Erodes Shale: Influencing Factors and Structural Damage Characteristics |
| title_full_unstemmed | Alkali Solution Erodes Shale: Influencing Factors and Structural Damage Characteristics |
| title_short | Alkali Solution Erodes Shale: Influencing Factors and Structural Damage Characteristics |
| title_sort | alkali solution erodes shale influencing factors and structural damage characteristics |
| url | http://dx.doi.org/10.1155/2018/3641627 |
| work_keys_str_mv | AT jipingshe alkalisolutionerodesshaleinfluencingfactorsandstructuraldamagecharacteristics AT haozhang alkalisolutionerodesshaleinfluencingfactorsandstructuraldamagecharacteristics AT yingzhong alkalisolutionerodesshaleinfluencingfactorsandstructuraldamagecharacteristics AT yangyuan alkalisolutionerodesshaleinfluencingfactorsandstructuraldamagecharacteristics AT jiachunyou alkalisolutionerodesshaleinfluencingfactorsandstructuraldamagecharacteristics |