Pore structure of transitional shales in the Ordos Basin, NW China:   Effects of composition on gas storage capacity

doi:10.1016/j.fuel.2017.05.083

CORC > 北京大学 > 地球与空间科学学院

	Pore structure of transitional shales in the Ordos Basin, NW China: Effects of composition on gas storage capacity
	Xiong, Fengyang ; Jiang, Zhenxue ; Li, Peng ; Wang, Xiangzeng ; Bi, He ; Li, Yirun ; Wang, Ziyuan ; Amooie, Mohammad Amin ; Soltanian, Mohamad Reza ; Moortgat, Joachim
刊名	FUEL
	2017
关键词	Shale gas Transitional shales Pore structure Composition Yanchang area Ordos Basin MISSISSIPPIAN BARNETT SHALE FORT-WORTH BASIN NORTHEASTERN BRITISH-COLUMBIA LONGMAXI MARINE SHALE ORGANIC-RICH SHALES NORTH-CENTRAL TEXAS METHANE ADSORPTION SICHUAN BASIN GEOLOGICAL CONTROLS THERMAL MATURITY
DOI	10.1016/j.fuel.2017.05.083
英文摘要	The recoverable resource of shale gas is 25 trillion cubic meter, 33% of which is stored in transitional shales in China. This work investigates the effects of organic and inorganic compositions on the development of Upper Paleozoic transitional shale pore structures through a combination of petrophysical and geochemical measurements. 42 shale samples were collected from marsh-lagoon and coastal delta settings in the Ordos Basin, NW China. The samples include the Upper Permian Shanxi shale (average total organic carbon (TOC) of 1.58 wt%, Type III kerogen, average vitrinite reflectance (Ro) 2.6%), and the Upper Carboniferous Benxi shale (average TOC of 1.91 wt%, Type III kerogen, average Ro 2.74%) at the overmature stage or dry gas window. An important characteristic of these shales is the large proportion of clay minerals (similar to 69% in Benxi shale and 54% in Shanxi shale). The quartz content is similar to 17% and 40% for Benxi and Shanxi shales, respectively. The pore structure of three samples and one isolated kerogen sample is analyzed via both low-pressure nitrogen and carbon dioxide adsorption methods. Low pressure nitrogen adsorption experiments show that Benxi and Shanxi shales characterized by ultra-low porosity and permeability develop mainly silt-shaped pores and potentially ink-bottle-shaped pores. We find that increasing fractions of organic matter (OM) result in a decrease in both total pore volume and specific surface area (SSA). Low pressure carbon dioxide adsorption experiments show that micropore volumes nonlinearly increase with increasing OM, although the contribution of organic micropore volume is limited. The mesopore and macropore volumes of inorganic compositions contribute mostly to the total pore; National Natural Science Foundation of China [41472112]; National Science and Technology Major Project [2011ZX05018-02]; China Geological Survey project [12120114046701]; Ohio State University Office of Energy and Environment; U.S. Department of Energy's (DOE) Office of Fossil Energy [FEAA-045]; U.S. DOE [DE-AC05-00OR22725]; SCI(E); ARTICLE; 504-515; 206
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/470461]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Xiong, Fengyang,Jiang, Zhenxue,Li, Peng,et al. Pore structure of transitional shales in the Ordos Basin, NW China: Effects of composition on gas storage capacity[J]. FUEL,2017.
APA	Xiong, Fengyang.,Jiang, Zhenxue.,Li, Peng.,Wang, Xiangzeng.,Bi, He.,...&Moortgat, Joachim.(2017).Pore structure of transitional shales in the Ordos Basin, NW China: Effects of composition on gas storage capacity.FUEL.
MLA	Xiong, Fengyang,et al."Pore structure of transitional shales in the Ordos Basin, NW China: Effects of composition on gas storage capacity".FUEL (2017).