Sediment damage caused by gas exsolution: A key mechanism for mud volcano formation
| العنوان: | Sediment damage caused by gas exsolution: A key mechanism for mud volcano formation |
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| المؤلفون: | Nabil Sultan, Patrice Imbert, Jean-Paul Callot, Arthur Blouin |
| المساهمون: | Laboratoire des Fluides Complexes et leurs Réservoirs (LFCR), TOTAL FINA ELF-Université de Pau et des Pays de l'Adour (UPPA)-Centre National de la Recherche Scientifique (CNRS), Unité de recherche Géosciences Marines (Ifremer) (GM), Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER), Centre scientifique et Technique Jean Feger (CSTJF), TOTAL FINA ELF, TOTAL-Scientific and Technical Center Jean Féger (CSTJF) |
| المصدر: | Engineering Geology Engineering Geology, Elsevier, 2019, 263, pp.105313. ⟨10.1016/j.enggeo.2019.105313⟩ Engineering Geology (0013-7952) (Elsevier BV), 2019-12, Vol. 263, P. 105313 (18p.) |
| بيانات النشر: | HAL CCSD, 2019. |
| سنة النشر: | 2019 |
| مصطلحات موضوعية: | 010504 meteorology & atmospheric sciences, 0211 other engineering and technologies, [SDU.STU]Sciences of the Universe [physics]/Earth Sciences, Preconsolidation pressure, 02 engineering and technology, 01 natural sciences, Gassy sediments, 14. Life underwater, Total pressure, Petrology, Mud volcano, ComputingMilieux_MISCELLANEOUS, 021101 geological & geomatics engineering, 0105 earth and related environmental sciences, Consolidation (soil), Gas exsolution, Sediment, Geology, Consolidation testing, Geotechnical Engineering and Engineering Geology, Sediment damage, Permeability (earth sciences), 13. Climate action, Compressibility, Saturation (chemistry) |
| الوصف: | Gassy sediments are common in marine environments and are characterized by a specific mechanical behavior significantly different from that of water-saturated sediments. It is shown that gas causes damage and initiates fractures in sediments. To define the controlling parameters dominating the damage process during gas exsolution and its consequences in terms of hydro-mechanical behavior, we developed a specific consolidation apparatus to test sediments collected from the active Absheron Mud Volcano. Indeed, mud volcano formation is initiated by gas exsolution and subsequent mud generation at depth from stratified sediments. Gas was generated in the samples by circulating carbonated water through the fine-grained sediments, then decreasing the total pressure. Particular attention was given to the impact of gas saturation and associated damage and fractures on P-wave velocity, sediment compressibility, permeability and preconsolidation pressure. Results show that fracture geometry is mainly controlled by the degree of gas saturation and preconsolidation pressure. The damage level increases with the degree of gas saturation while the elastic modulus of sediments is degraded. Experimental data show that sediments do not entirely recover their original mechanical behavior when gas dissipates. Finally, the experimental data confirm that gas exsolution and expansion is a key mechanism for mud generation. |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 0013-7952 1872-6917 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bd41ff45118370416750f28d0192db76Test https://hal.archives-ouvertes.fr/hal-02377189/file/S0013795219309676.pdfTest |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....bd41ff45118370416750f28d0192db76 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 00137952 18726917 |
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