气候变化领域集成服务门户(CCPortal): A model for porosity evolution in shale reservoirs: An example from the Upper Devonian Duvernay Formation, Western Canada Sedimentary Basin

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DOI	10.1306/10261817272
	A model for porosity evolution in shale reservoirs: An example from the Upper Devonian Duvernay Formation, Western Canada Sedimentary Basin
	Dong T.; Harris N.B.; McMillan J.M.; Twemlow C.E.; Nassichuk B.R.; Bish D.L.
发表日期	2019
ISSN	0149-1423
卷号	103 期号:5
英文摘要	The influence of thermal maturity on porosity in shale samples from the Upper Devonian Duvernay Formation is examined. The samples span a maturity range from immature to the wet gas window. Porosity decreases from immature to the oil window, primarily because of compaction. Relatively high porosity of wet gas window samples is ascribed to formation of secondary organic pores, feldspar dissolution pores, and primary pore preservation by the quartz framework. The final decline in the porosity of the dry gas window samples is explained by greater compaction, the disappearance of secondary organic pores, and feldspar dissolution pores. Porosity correlates positively to quartz content and negatively to carbonate content; no relationship was evident between porosity and clay or total organic carbon content. No obvious correlations exist between rock composition and permeability except that SiO2 content shows a weakly positive correlation to permeability. Permeability is highest in immature samples, which have the greatest pore and pore-throat sizes. Nitrogen adsorption and mercury injection analysis show that pore and pore-throat sizes decrease with increasing maturity. Visible pores, imaged by scanning electron microscopy and helium ion microscopy, exist as organic pores, including bubblelike pores developed within organic matter (OM) and fissure-type pores, intraparticle pores mainly developed within carbonate grains, and interparticle pores either within a clay-rich matrix or between rigid mineral grains. In immature samples, the primary pores are interparticle pores between clay minerals and other mineral grains. The OM fissures are ubiquitous in oil window samples, and secondary bubblelike OM–hosted pores are well developed within gas window samples. Copyright ©2019. The American Association of Petroleum Geologists. All rights reserved.
语种	英语
scopus关键词	Clay minerals; Compaction; Dissolution; Feldspar; Gas adsorption; Organic carbon; Quartz; Scanning electron microscopy; Shale; Carbonate content; Feldspar dissolution; Helium ion microscopies; Nitrogen adsorption; Porosity evolutions; Positive correlations; Total organic carbon content; Western canada sedimentary basins; Porosity; clay mineral; detection method; Devonian; hydrocarbon reservoir; model; organic matter; shale; thermal maturity; total organic carbon; Western Canada Sedimentary Basin
来源期刊	AAPG Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/125019
作者单位	Key Laboratory of Tectonics and Petroleum Resources, China University of Geosciences, Ministry of Education, Wuhan, China; Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, AB, Canada; Trican Geological Solutions, Ltd., Calgary, AB, Canada; Department of Geological Sciences, Indiana University, Bloomington, IN, United States
推荐引用方式 GB/T 7714	Dong T.,Harris N.B.,McMillan J.M.,et al. A model for porosity evolution in shale reservoirs: An example from the Upper Devonian Duvernay Formation, Western Canada Sedimentary Basin[J],2019,103(5).
APA	Dong T.,Harris N.B.,McMillan J.M.,Twemlow C.E.,Nassichuk B.R.,&Bish D.L..(2019).A model for porosity evolution in shale reservoirs: An example from the Upper Devonian Duvernay Formation, Western Canada Sedimentary Basin.AAPG Bulletin,103(5).
MLA	Dong T.,et al."A model for porosity evolution in shale reservoirs: An example from the Upper Devonian Duvernay Formation, Western Canada Sedimentary Basin".AAPG Bulletin 103.5(2019).