| DOI: | 10.1306/05171311165
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| Scopus记录号: | 2-s2.0-84893349737
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| 论文题名: | Geometric models of porosity reduction by ductile grain compaction and cementation |
| 作者: | Mousavi M.A.; Bryant S.L.
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| 刊名: | AAPG Bulletin
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| ISSN: | 0149-1623
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| EISSN: | 1558-9353
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| 出版年: | 2013
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| 发表日期: | 2013
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| 卷: | 97, 期:12 | | 起始页码: | 2129
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| 结束页码: | 2148
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| 语种: | 英语
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| Scopus关键词: | Compaction behavior
; Different proportions
; Ductile materials
; Geometric modeling
; Geometric models
; Pore-scale geometry
; Porosity reduction
; Quartz cementation
; Cementing (shafts)
; Cements
; Geometry
; Porosity
; Quartz
; Sandstone
; Compaction
; algorithm
; cementation
; compaction
; geometry
; permeability
; plastic deformation
; porosity
; quartz
|
| Scopus学科分类: | Energy
; Earth and Planetary Sciences
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| 英文摘要: | Pore-volume reduction of sediments by plastic deformation during compaction and by cementation of grains has been evaluated for different proportions of ductile and hard grains. We represent the compaction behavior of grains with a purely geometric model, which uses the cooperative rearrangement algorithm to produce dense, random packings of partly interpenetrating spheres. We varied the fraction of grains assumed to be ductile and the radius of the rigid core of the ductile grains. The predicted relationship between the fraction of ductile grains in the sediment and the porosity after compaction agrees well with previously published experimental data in the literature. The radius of the rigid core of the ductile grains is an effective way to represent different kinds of ductile material, ranging from brittle (rigid radius >0.9) to extremely ductile (rigid radius <0.7). We simulated quartz cementation in our compacted rock by adding isopachous cement. Cement thickness was reduced on the smaller grains and increased on the larger grains to account for presumed export of pressuredissolved material from finer grained regions and the import of material into coarser grained regions. These simulations yield descriptions of pore-scale geometry resulting from processes common in sandstones. Modeled pore geometry provides insight into transport properties of such rocks. For example, the models predict, to within a factor of five, the permeability of samples of tight-gas sandstones having little intragranular porosity. Copyright © 2013. The American Association of Petroleum Geologists. All rights reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84893349737&doi=10.1306%2f05171311165&partnerID=40&md5=efb42d4a33b7f572eaaa60ec55c24798
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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/13193
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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: | |
Mousavi M.A.,Bryant S.L.. Geometric models of porosity reduction by ductile grain compaction and cementation[J]. AAPG Bulletin,2013-01-01,97(12)
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