Pore Development Characteristics of Marine-Continental Transitional Shale of Benxi Formation from the Ordos Basin, China

doi:10.1021/acs.energyfuels.3c03964

	Guo, Huijuan 1,2; Liu, Min 1,2,3; Zhang, Hui 4; Zhao, Weibo 4; Wang, Huaichang 4; Zhou, Qin 1,2; Shi, Shuyong 1,2; He, Zhihua 1,2; Liu, Xinshe 4; Wang, Yunpeng1,2 ; Peng, Ping'an 1,2
	Pore Development Characteristics of Marine-Continental Transitional Shale of Benxi Formation from the Ordos Basin, China
Source Publication	ENERGY & FUELS
ISSN	0887-0624
	2023-12-26
Volume	38 Issue:2 Pages:1126-1147
DOI	10.1021/acs.energyfuels.3c03964
Language	英语
WOS Research Area	Energy & Fuels ; Engineering
Abstract	The mechanisms governing pore development, particularly of organic pores, in marine-continental transitional shales remain poorly constrained. This study investigated the primary controls on pore evolution within transitional shales of the Benxi Formation using low-pressure gas adsorption, field emission scanning electron microscopy, bulk mineralogy and maceral analyses, and other techniques. Total organic carbon (TOC) contents exhibit positive correlations with shale microporosity and negative correlations with macroporosity. On the basis of S/TOC ratios and sedimentological evidence, the Benxi shales accumulated across a range of marine, brackish, and freshwater depositional environments. In general, more negative delta C-13(kerogen) values correlate with higher S/TOC, consistent with a marine source for the most C-13-depleted kerogens. Kerogens with delta C-13 of < -25 parts per thousand reflect a marine origin, while those with delta C-13 of > -25 parts per thousand indicate varying salinity conditions. Both organic matter composition and pore development within type III kerogens proved highly sensitive to paleosalinity. Specifically, marine-sourced organic matter possesses substantially lower microporosity but higher meso- and macroporosities compared to material deposited in freshwater settings. Accordingly, thermally mature marine-influenced Benxi shales likely retain greater shale gas potential versus non-marine equivalents.
WOS ID	WOS:001145499100001
Indexed By	SCI
Citation statistics
Document Type	期刊论文
Identifier	http://ir.gig.ac.cn/handle/344008/76132
Collection	有机地球化学国家重点实验室
Corresponding Author	Guo, Huijuan; Wang, Yunpeng
Affiliation	1.Chinese Acad Sci, State Key Lab Organ Geochem, Guangzhou Inst Geochem, Guangzhou 510640, Guangdong, Peoples R China 2.CAS Ctr Excellence Deep Earth Sci, Guangzhou 510640, Guangdong, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.PetroChina Changqing Oilfield, Res Inst Explorat & Dev, Xian 710018, Shaanxi, Peoples R China
Recommended Citation GB/T 7714	Guo, Huijuan,Liu, Min,Zhang, Hui,et al. Pore Development Characteristics of Marine-Continental Transitional Shale of Benxi Formation from the Ordos Basin, China[J]. ENERGY & FUELS,2023,38(2):1126-1147.
APA	Guo, Huijuan.,Liu, Min.,Zhang, Hui.,Zhao, Weibo.,Wang, Huaichang.,...&Peng, Ping'an.(2023).Pore Development Characteristics of Marine-Continental Transitional Shale of Benxi Formation from the Ordos Basin, China.ENERGY & FUELS,38(2),1126-1147.
MLA	Guo, Huijuan,et al."Pore Development Characteristics of Marine-Continental Transitional Shale of Benxi Formation from the Ordos Basin, China".ENERGY & FUELS 38.2(2023):1126-1147.

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