NDLI: The relationship between organic matter and specific surface area in <2 μm clay size fraction of muddy source rock

Content Provider	Springer Nature Link
Author	Ding, Fei Cai, JinGong Song, MingShui Yuan, Peng
Copyright Year	2013
Abstract	The adsorption of organic matter (OM) onto clay minerals has long been considered as a significant way of OM preservation in source rock. Here we analyzed the relationship between OM and the specific surface area (SSA) of <2 μm clay size fraction isolated from 13 source rock cores collected from Dongying depression. Rock-Eval pyrolysis and N$_{2}$ adsorption experiment were employed to probe the characteristics of OM and SSA (denoted S $_{BET}$) in samples before and after OM extraction using trichloromethane. The results indicate that various kinds of OM occurrence coexist in clay size fraction and their contributions to hydrocarbon are different in each period of OM evolution. The occurrence and amount of OM affect the S $_{BET}$ of clay size fraction, and a nonlinear negative correlation between total organic carbon (TOC) and SBET can be recognized. The soluble OM (chloroform extract “A”), mainly stored in the pore space of clay size fraction, shows a negative correlation in amount with S $_{BET}$. Our data also indicate that free hydrocarbon (S1) was stored mainly in the pore space and/or the surface of clay size fraction, whereas pyrolysis hydrocarbon (S2) was mingled mainly with clay minerals. Therefore, to understand various OM occurrences and their relationship with S $_{BET}$ in the clay size fraction is significant in the study of generation, accumulation, and migration of hydrocarbon in muddy source rock.
Starting Page	1343
Ending Page	1349
Page Count	7
File Format	PDF
ISSN	16747313
Journal	Science in China Series D: Earth Sciences
Volume Number	56
Issue Number	8
e-ISSN	18691897
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2013-06-08
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	clay size fraction organic matter specific surface area occurrence characteristics Earth Sciences
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences

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