| DOI: | 10.1306/03051514151
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| Scopus记录号: | 2-s2.0-84944328023
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| 论文题名: | Pore types and pore-size distributions across thermal maturity, Eagle Ford Formation, southern Texas |
| 作者: | Pommer M.; Milliken K.
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| 刊名: | AAPG Bulletin
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| ISSN: | 0149-1485
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| EISSN: | 1558-9215
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| 出版年: | 2015
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| 发表日期: | 2015
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| 卷: | 99, 期:9 | | 起始页码: | 1713
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| 结束页码: | 1744
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| 语种: | 英语
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| Scopus关键词: | Biogeochemistry
; Biological materials
; Cementing (shafts)
; Compaction
; Minerals
; Organic compounds
; Porosity
; Complex response
; Detection limits
; Mechanical process
; Porosity and pore size
; Scanning electrons
; Secondary pores
; Secondary porosity
; Thermal maturity
; Pore size
; calcite
; cementation
; coccolith
; organic matter
; pore space
; porosity
; scanning electron microscopy
; sedimentary rock
; thermal maturity
; Maverick Basin
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| Scopus学科分类: | Energy
; Earth and Planetary Sciences
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| 英文摘要: | Pore types, pore size, and pore abundance vary systematically across thermal maturity in the Eagle Ford Formation, Maverick Basin, southern Texas. Scanning electron imaging of 20 samples from four wells is used to assess the complex response of pores to chemical and mechanical processes, entailing both destruction of primary porosity and generation of secondary pores. Primary mineral-associated pores are destroyed by compaction, cementation, and infill of secondary organic matter, whereas secondary pores are generated within organic matter (OM). Destruction of primary pores during early burial (to Ro ∼0.5%) occurs by compaction of ductile detrital OM and clays and, to a lesser degree, as a result of cementation and infill of secondary OM. Larger pores are associated with coccolith debris. The dominant OM is spatially isolated detrital OM "stringers." Porosity is volumetrically dominated (average 6.2%) by relatively large, mostly interparticle mineral-associated pores (median size 51.6 nm [0.000002 in.]; detection limit near 3-4 nm [0.00000012-0.00000015 in.]). At low maturity, porosity and pore size correlate directly with calcite abundance and inversely with OM volumes. At higher maturity, further destruction of primary pores occurs through cementation, secondary OM infill, and greater compaction. Mineral-associated pores are present at high-maturity (Ro ∼1.2% - 1.3%), but are smaller (median size 30.2 nm [0.0000011 in.]) and less abundant (average of 2.5%) than at low maturity. A large portion of OM within high-maturity samples is diagenetic in origin and has pervaded into primary pore space, coating cement crystals, and filling intraparticle pores. Substantial mineral-associated porosity is locally present in samples where incursion of primary pore space by secondary OM has not occurred. Abundant secondary porosity is generated as OM matures into the wet-gas window. Porosity in most high-maturity samples is volumetrically dominated (average of 1.3%) by smaller, OM-hosted pores (median size 13.2 nm [0.00000051 in.]). Copyright © 2015. The American Association of Petroleum Geologists. All rights reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84944328023&doi=10.1306%2f03051514151&partnerID=40&md5=84cf4ef9abc0f3c375c71464cc83857f
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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/13056
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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: | |
Pommer M.,Milliken K.. Pore types and pore-size distributions across thermal maturity, Eagle Ford Formation, southern Texas[J]. AAPG Bulletin,2015-01-01,99(9)
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