| DOI: | 10.1306/04061514181
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| Scopus记录号: | 2-s2.0-84944350922
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| 论文题名: | Feldspar dissolution-enhanced porosity in Paleoproterozoic shale reservoir facies from the Barney Creek Formation (McArthur Basin, Australia) |
| 作者: | Baruch E.T.; Kennedy M.J.; Löhr S.C.; Dewhurst D.N.
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| 刊名: | AAPG Bulletin
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| ISSN: | 0149-1510
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| EISSN: | 1558-9240
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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: | 1745
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| 结束页码: | 1770
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| 语种: | 英语
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| Scopus关键词: | Analytical geochemistry
; Carbon
; Cements
; Dissolution
; Feldspar
; Geochemistry
; Imaging techniques
; Porosity
; Sediments
; Weathering
; Chemical weathering
; Dolomite dissolution
; Electron imaging techniques
; Feldspar dissolution
; Geochemical analysis
; Hydrocarbon systems
; Reservoir property
; Total Organic Carbon
; Organic carbon
; clay
; dissolution
; dolomite
; feldspar
; gas field
; oil field
; Phanerozoic
; pore space
; porosity
; reservoir
; shale
; thermal maturity
; weathering
; Australia
; McArthur Basin
|
| Scopus学科分类: | Energy
; Earth and Planetary Sciences
|
| 英文摘要: | The Paleoproterozoic Barney Creek Formation (BCF; McArthur Basin, Australia) is one of the oldest active hydrocarbon systems on Earth with oil and gas shows present within organic-rich intervals (up to 7 wt. % total organic carbon). We combine bulk geochemical analyses, pore-space characterization, and high-resolution electron imaging techniques to characterize the evolution of the BCF pore system with maturity. A thermal gradient from the pre-oil window (0.48% calc. Ro) to gas window (1.01% calc. Ro) shows a progressive change in pore networks with the loss of organic-hosted pores dominant in thermally immature samples to porosity increasingly associated with the mineral matrix with thermal maturity. Precipitation of fine-grained, high surface area cements reduced porosity within the oil window, whereas feldspar and dolomite dissolution and creation of secondary pores increased porosity within the gas window. The abundance of feldspar grains (up to 50%) provided a significant potential for secondary pore formation as well as a source of silica and clay cement. This study identifies a first-order linkage between the chemically reactive sediments that are key to the reservoir properties in the BCF and a provenance and/or weathering intensity conducive to supplying fine-grained, mineralogically immature sediments during deposition. These findings likely apply more broadly to other chemically immature mudrocks typical of Precambrian age sediments or Phanerozoic settings subject to limited chemical weathering. Copyright © 2015. The American Association of Petroleum Geologists. All rights reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84944350922&doi=10.1306%2f04061514181&partnerID=40&md5=4d4ad202689e20d7cddfecdc7d7bedef
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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/13081
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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: | |
Baruch E.T.,Kennedy M.J.,Löhr S.C.,et al. Feldspar dissolution-enhanced porosity in Paleoproterozoic shale reservoir facies from the Barney Creek Formation (McArthur Basin, Australia)[J]. AAPG Bulletin,2015-01-01,99(9)
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