Effects of a polyamine inhibitor on the microstructure and macromechanical properties of hydrated shale Article Swipe
Yunlei Hu
,
Xiangchao Shi
,
Qingling Li
,
Leiyu Gao
,
Feng Wu
,
Gang Xie
·
YOU?
·
· 2022
· Open Access
·
· DOI: https://doi.org/10.1016/j.petlm.2022.02.002
YOU?
·
· 2022
· Open Access
·
· DOI: https://doi.org/10.1016/j.petlm.2022.02.002
China is rich in shale gas resources, however, wellbores in shale gas reservoirs are frequently unstable. This has a serious impact on the shale gas drilling cycle. Polyamine, a common additive in water-based shale drilling fluids, can effectively inhibit shale hydration. However, there is a lack of quantitative research on the effect of polyamine inhibitors on the microstructure and macromechanical properties of shale. Therefore, this study investigated those issues via a systematic hydration experiment carried out on shale from the Longmaxi Formation. The results show that microfractures are created and expand during shale hydration, that they also connect to form a complex microfracture network, and that 3% polyamine inhibitors (polyamine solution with volume fraction of 3%) can effectively inhibit their evolution. The ultrasonic velocities and UCS of the Longmaxi shale are significantly anisotropic; the former first increases and then decreases with the laminae angle, reaching its maximum when the laminae angle is 30°. The UCS of the shale is highest and lowest, respectively, when the laminae angles are 0° or 90° and 30°. In general, these UCS appear as a “U'' pattern, high on two sides with a dip in the center. Polyamines can effectively inhibit both the expansion of shale and the reduction of P-wave and S-wave velocities, the UCS, and elastic modulus. The UCS of a shale sample was reduced by 28%–40% after immersion for 96 h in water, compared to 2%–20% after immersion in a 3% polyamine inhibitor for the same amount of time. The inhibiting effect of the polyamine was remarkable.
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- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.1016/j.petlm.2022.02.002
- OA Status
- diamond
- Cited By
- 10
- References
- 36
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W4214750420
All OpenAlex metadata
Raw OpenAlex JSON
- OpenAlex ID
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https://openalex.org/W4214750420Canonical identifier for this work in OpenAlex
- DOI
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https://doi.org/10.1016/j.petlm.2022.02.002Digital Object Identifier
- Title
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Effects of a polyamine inhibitor on the microstructure and macromechanical properties of hydrated shaleWork title
- Type
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articleOpenAlex work type
- Language
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enPrimary language
- Publication year
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2022Year of publication
- Publication date
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2022-02-25Full publication date if available
- Authors
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Yunlei Hu, Xiangchao Shi, Qingling Li, Leiyu Gao, Feng Wu, Gang XieList of authors in order
- Landing page
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https://doi.org/10.1016/j.petlm.2022.02.002Publisher landing page
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YesWhether a free full text is available
- OA status
-
diamondOpen access status per OpenAlex
- OA URL
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https://doi.org/10.1016/j.petlm.2022.02.002Direct OA link when available
- Concepts
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Oil shale, Polyamine, Drilling fluid, Microstructure, Shale oil, Drilling, Geology, Petroleum engineering, Chemistry, Chemical engineering, Mineralogy, Composite material, Materials science, Biochemistry, Paleontology, Engineering, MetallurgyTop concepts (fields/topics) attached by OpenAlex
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10Total citation count in OpenAlex
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2025: 4, 2024: 3, 2023: 3Per-year citation counts (last 5 years)
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36Number of works referenced by this work
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10Other works algorithmically related by OpenAlex
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