气候变化领域集成服务门户(CCPortal): Graptolites as fossil geo-thermometers and source material of hydrocarbons: An overview of four decades of progress

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DOI	10.1016/j.earscirev.2019.103000
	Graptolites as fossil geo-thermometers and source material of hydrocarbons: An overview of four decades of progress
	Luo Q.; Fariborz G.; Zhong N.; Wang Y.; Qiu N.; Skovsted C.B.; Suchý V.; Hemmingsen Schovsbo N.; Morga R.; Xu Y.; Hao J.; Liu A.; Wu J.; Cao W.; Min X.; Wu J.
发表日期	2020
ISSN	0012-8855
卷号	200
英文摘要	The thermal maturity of lower Paleozoic graptolite-bearing marine sediments, which host many hydrocarbon deposits worldwide, has long been difficult to determine due to the absence of wood-derived vitrinite particles for conventional vitrinite reflectance. In 1976, graptolite reflectance was introduced as a new indicator for organic maturity of these deposits and has been used since in many regional studies. The majority of these studies, however, were done on a limited sample set and a limited range of thermal maturity, which resulted in a number of controversial views concerning the usefulness of graptolite reflectance as an alternative paleothermal indicator and its correlation with vitrinite reflectance through various proxies. In this paper, we review previous studies and combine those analyses with new data to assess the physical and chemical characteristics of graptolite periderm with increasing thermal maturity. We conclude that graptolite random reflectance (GRor) is a better parameter for the thermal maturity assessment than graptolite maximum reflectance (GRomax) due to the better quality of available data. Combining published data with results of our study of both natural and heat-treated graptolites and vitrinite, we present a new correlation between GRor and equivalent vitrinite reflectance (EqVRo), as EqVRo = 0.99GRor + 0.08. Chemical composition of graptolite periderm is similar to vitrinite; graptolites are mainly kerogen Type II-III, are gas prone and have a substantial hydrocarbon potential. Lower Paleozoic graptolite-bearing organic-rich sediments are important shale gas source rocks and reservoirs globally and make a significant contribution to worldwide petroleum reserves. © 2019 Elsevier B.V.
英文关键词	Alum Shale; Chemical composition; Graptolite; Hot Shale; Optical characteristics; Shale gas; Thermal maturity; Wufeng–Longmaxi formations
语种	英语
scopus关键词	chemical composition; fossil record; graptolite; hydrocarbon; hydrocarbon reserve; hydrocarbon reservoir; kerogen; marine sediment; optical property; paleotemperature; Paleozoic; petroleum hydrocarbon; shale; source rock; thermal maturity; vitrinite; vitrinite reflectance
来源期刊	EARTH-SCIENCE REVIEWS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/209784
作者单位	State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum (Beijing), Beijing, 102249, China; College of Geoscience, China University of Petroleum, Beijing, 102249, China; FG &Partner Ltd, Research Group, 29 Hawkside Mews NW., Calgary, Alberta, Canada; Department of Palaeobiology, Swedish Museum of Natural History, Box 50007, Stockholm, SE 104 05, Sweden; Nuclear Physics Institute, v. v. I., Academy of Sciences of the Czech Republic, Na Truhlářce 39/64, Prague 8, 180 86, Czech Republic; Geological Survey of Denmark and Greenland (GEUS), Øster Voldgade 10, Copenhagen K, DK 1350, Denmark; Silesian University of Technology, Faculty of Mining, Safety Engineering and Industrial Automation, Institute of Applied Geology, Akademicka 2, Gliwice, 44-100, Poland; Hubei Cooperative Innovation Center of Unconventional Oil and Gas, Yangtze University, Wuhan, 430100, China
推荐引用方式 GB/T 7714	Luo Q.,Fariborz G.,Zhong N.,et al. Graptolites as fossil geo-thermometers and source material of hydrocarbons: An overview of four decades of progress[J],2020,200.
APA	Luo Q..,Fariborz G..,Zhong N..,Wang Y..,Qiu N..,...&Wu J..(2020).Graptolites as fossil geo-thermometers and source material of hydrocarbons: An overview of four decades of progress.EARTH-SCIENCE REVIEWS,200.
MLA	Luo Q.,et al."Graptolites as fossil geo-thermometers and source material of hydrocarbons: An overview of four decades of progress".EARTH-SCIENCE REVIEWS 200(2020).