| DOI: | 10.1306/10161211190
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| Scopus记录号: | 2-s2.0-84877873500
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| 论文题名: | Fault transmissibility in clastic-argillaceous sequences controlled by clay smear evolution |
| 作者: | Giger S.B.; Clennell M.B.; Bozkurt Çiftçi N.; Harbers C.; Clark P.; Ricchetti M.
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| 刊名: | AAPG Bulletin
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| ISSN: | 0149-1683
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| EISSN: | 1558-9413
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| 出版年: | 2013
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| 发表日期: | 2013
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| 卷: | 97, 期:5 | | 起始页码: | 705
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| 结束页码: | 731
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| 语种: | 英语
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| Scopus关键词: | Brittle process
; Effective normal stress
; Effective stress
; Large displacements
; Normalized displacements
; Reservoir sandstones
; Sealing layers
; Testing range
; Crystallography
; Mechanical properties
; Mineralogy
; Minerals
; Sandstone
; Silicates
; Tectonics
; Clay minerals
; algorithm
; cement
; claystone
; deformation mechanism
; fault displacement
; fault zone
; fluid flow
; mudstone
; normal fault
; phyllosilicate
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| Scopus学科分类: | Energy
; Earth and Planetary Sciences
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| 英文摘要: | The continuity of clay smears evolving in sealed direct shear experiments of initially intact sandstone-mudrock sequences was quantified to large displacements up to more than ten times the thickness of the sealing layer. The sample blocks consisted of a preconsolidated clay-rich seal layer, which was embedded and synthetically cemented in quartz sand. The mineralogy and mechanical properties of the clay layer and the reservoir sandstones were varied systematically to mimic a range of natural clastic rock sequences. The fluid-flow response across the fault zone was monitored continuously during deformation using a new type of direct shear cell. The displacement at which seals break down is closely linked to the amount of phyllosilicates in the seal layer. Contrary to expectations, softer seal layers do not seal better than stiff seal layers for a given clay content. In the testing range of normal effective stresses between 4 to 24 MPa (580-3481 psi) covering maximum burial depth conditions of approximately 800 m (2625 ft) to approximately 4 km (2 mi) (assuming normal fault tectonics), a systematic trend is also observed, indicating better smear continuity by increasing the effective normal stress. Predominandy brittle processes such as slicing and wear, and not ductile drag or plastic flow, appear to be responsible for the generation of clay smears. The test results offer the prospect of incorporating critical shale smear factors (i.e., normalized displacement at which seal breakdown occurs) into probabilistic fault seal algorithms that consider important properties that can be measured or estimated, namely, clay content and fault-normal effective stress. © 2013. The American Association of Petroleum Geologists. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84877873500&doi=10.1306%2f10161211190&partnerID=40&md5=fb730608615abd96d115bb11250135e6
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/13253
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| Appears in Collections: | 过去全球变化的重建
影响、适应和脆弱性
科学计划与规划
气候变化与战略
全球变化的国际研究计划
气候减缓与适应
气候变化事实与影响
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| Recommended Citation: | |
Giger S.B.,Clennell M.B.,Bozkurt Çiftçi N.,et al. Fault transmissibility in clastic-argillaceous sequences controlled by clay smear evolution[J]. AAPG Bulletin,2013-01-01,97(5)
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