| DOI: | 10.1306/072312l2O48
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| Scopus记录号: | 2-s2.0-84875740687
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| 论文题名: | Organic matter-hosted pore system, Marcellus Formation (Devonian), Pennsylvania |
| 作者: | Milliken K.L.; Rudnicki M.; Awwiller D.N.; Zhang T.
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| 刊名: | AAPG Bulletin
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| ISSN: | 0149-1702
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| EISSN: | 1558-9432
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| 出版年: | 2013
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| 发表日期: | 2013
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| 卷: | 97, 期:2 | | 起始页码: | 177
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| 结束页码: | 200
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| 语种: | 英语
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| Scopus关键词: | Field emission scanning electron microscopy
; Hydrogen indices
; Mineral matrixes
; Morphology and size
; Positive correlations
; Thermal maturity
; Total Organic Carbon
; Vitrinite reflectance
; Biogeochemistry
; Biological materials
; Enamels
; Methane
; Organic compounds
; Stratigraphy
; Porosity
; bubble
; compaction
; Devonian
; helium
; methane
; organic matter
; pore space
; reflectance
; scanning electron microscopy
; sedimentary rock
; sequence stratigraphy
; size distribution
; thermal maturity
; total organic carbon
; vitrinite
; Pennsylvania
; United States
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| Scopus学科分类: | Energy
; Earth and Planetary Sciences
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| 英文摘要: | The Marcellus Formation of Pennsylvania represents an outstanding example of an organic matter (OM)-hosted pore system; most pores detectable by field-emission scanning electron microscopy (FE-SEM) are associated with OM instead of mineral matrix. In the two wells studied here, total organic carbon (TOC) content is a stronger control on OM-hosted porosity than is thermal maturity. The two study wells span a maturity from late wet gas (vitrinite reflectance [RoJ, -1.0%) to dry gas (Ro, -2.1%). Samples with a TOC less than 5.5 wt. % display a positive correlation between TOC and porosity, but samples with a TOC greater than 5.5 wt. % display little or no increase in porosity with a further increasing TOC. In a subset of samples (14) across a range of TOC (2.3-13.6 wt. %), the pore volume detectable by FE-SEM is a small fraction of total porosity, ranging from 2 to 32% of the helium porosity. Importantly, the FE-SEM-visible porosity in OM decreases significantly with increasing TOC, diminishing from 30% of OM volume to less than 1% of OM volume across the range of TOC. The morphology and size of OM-hosted pores also vary systematically with TOC. The interpretation of this anticorrelation between OM content and SEM-visible pores remains uncertain. Samples with the lowest OM porosity (higher TOC) may represent gas expulsion (pore collapse) that was more complete as a consequence of greater OM connectivity and framework compaction, whereas samples with higher OM porosity [lower TOC) correspond to rigid mineral frameworks that inhibited compactional expulsion of methane-filled bubbles. Alternatively, higher TOC samples may contain OM (low initial hydrogen index, relatively unreactive) that is less prone to development of FE-SEM-detectable pores. In this interpretation, OM type, controlled by sequence-stratigraphic position, is a factor in determining pore-size distribution. Copyright © 2013. The American Association of Petroleum Geologists. All rights reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84875740687&doi=10.1306%2f072312l2O48&partnerID=40&md5=b2aafd628136fdadc27dcf99c3d98e6c
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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/13272
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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: | |
Milliken K.L.,Rudnicki M.,Awwiller D.N.,et al. Organic matter-hosted pore system, Marcellus Formation (Devonian), Pennsylvania[J]. AAPG Bulletin,2013-01-01,97(2)
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