NDLI: Classification and oil system of continental shale: Es3$^{L}$ sub-member of Bonan sag, Jiyang depression, Eastern China

Content Provider	Springer Nature Link
Author	Wang, Min Liu, Yang Lu, Shuangfang
Copyright Year	2016
Abstract	On the basis of shale textures, carbonate contents, and total organic carbon (TOC) contents, five types of continental shale are identified: organic-rich laminated argillaceous limestone, organic-rich laminated lime mudstone, organic-lean laminated argillaceous limestone, non-laminated massive argillaceous limestone, and non-laminated massive lime mudstone. Criteria for shale oil system is also proposed, characterized by Ro value higher than 0.5 %, TOC content higher than 0.5 wt%, or S$_{1}$ (free hydrocarbon) value higher than 0.5 mg/g, with more than 2-m-thick shale top and bottom layers, and the whole system thickness is no less than 30 m. The Es3$^{L}$ (lower sub-member of the third member of Paleogene Shahejie formation) continental shale has total organic carbon (TOC) values ranging from 0.71 to 9.32 wt%, with an average of 3.1 wt%. The organic matter (OM) is predominantly type I kerogen, with minor amounts of type II kerogen. Vitrinite reflectance ranges from 0.7 to 0.9 %, indicating that most of the shales are in the oil generation window. The temperature of maximum yield of pyrolysate (T $_{max}$) ranges from 424 to 447 °C, with an average of 440 °C. Free hydrocarbon (S$_{1}$) values range from 0.03 to 13.12 mg HC/g rock, with an average of 2.14 mg HC/g rock, the hydrocarbons cracked from kerogen (S$_{2}$) yield values in the range of 1.19–78.59 mg HC/g rock, with an average of 17.07 mg HC/g rock, and hydrogen index (HI) values range from 160.58 to 1041.82 mg/g TOC, and with an average of 495.87 mg/g TOC. The dominant minerals of the Es3$^{L}$ shale are carbonates (including calcite and dolomite), ranging from 38 to 92 wt%, with an average of 65 wt%, along with secondary clay and quartz, both at an average of 17.5 wt%. The continental shale oil resource potential of Es3$^{L}$ in the Bonan sag was evaluated through further research on TOC content, and free oil content (S$_{1}$). The evaluation results show that the shale oil accumulation intensity ranges from 0.3 to 4 × 10$^{6}$ ton/km$^{2}$. The oil content of the Es3$^{L}$ continental shale is similar to that of Monterey shale and Antelope shale of the USA.
Starting Page	1
Ending Page	12
Page Count	12
File Format	PDF
ISSN	18667511
Journal	Arabian Journal of Geosciences
Volume Number	9
Issue Number	3
e-ISSN	18667538
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2016-03-03
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Continental shale Shale classification Shale oil system Resource potential Bonan sag Jiyang depression Earth Sciences
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences Environmental Science

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