Experimental Study on the Effects of Stress Variations on the Permeability of Feldspar-Quartz Sandstone
| Autor: | Yilong Yuan, Tianshan Lan, Fugang Wang, Zhaoxu Mi, Tianfu Xu, Zhaojun Sun, Xufeng Li |
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| Rok vydání: | 2017 |
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Article Subject
020209 energy lcsh:QE1-996.5 Multiple stress 02 engineering and technology 010502 geochemistry & geophysics Feldspar Overburden pressure 01 natural sciences lcsh:Geology Permeability (earth sciences) visual_art 0202 electrical engineering electronic engineering information engineering visual_art.visual_art_medium General Earth and Planetary Sciences Geotechnical engineering Clay minerals Petrology Injection pressure Quartz Geology 0105 earth and related environmental sciences |
| Zdroj: | Geofluids, Vol 2017 (2017) |
| ISSN: | 1468-8123 1468-8115 |
| Popis: | The multistage and discontinuous nature of the injection process used in the geological storage of CO2 causes reservoirs to experience repeated loading and unloading. The reservoir permeability changes caused by this phenomenon directly impact the CO2 injection process and the process of CO2 migration in the reservoirs. Through laboratory experiments, variations in the permeability of sandstone in the Liujiagou formation of the Ordos CO2 capture and storage (CCS) demonstration project were analyzed using cyclic variations in injection pressure and confining pressure and multistage loading and unloading. The variation in the micropore structure and its influence on the permeability were analyzed based on micropore structure tests. In addition, the effects of multiple stress changes on the permeability of the same type of rock with different clay minerals content were also analyzed. More attention should be devoted to the influence of pressure variations on permeability in evaluations of storage potential and studies of CO2 migration in reservoirs in CCS engineering. |
| Databáze: | OpenAIRE |
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