Geochemical Research on the Late Cretaceous strata of Well SK<?xml:namespace prefix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" /><st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="True" SourceValue="1" UnitName="in">1 in</st1:chmetcnv> <st1:place w:st="on"><st1:PlaceName w:st="on">Songliao</st1:PlaceName> <st1:PlaceType w:st="on">Basin</st1:PlaceType></st1:place><?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p>

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Geochemical Research on the Late Cretaceous strata of Well SK1 in Songliao Basin

详细信息

责任者：Feng Zihui (School of Earth and Space Sciences ; Peking University ; Beijing 100871 ; China) ; Huo Qiuli
刊名：Earth Science Frontiers
出版年：2009
卷期：16(5)
关键词：有机地球化学 ; organic geochemistry ; 沉积环境 ; sedimentary environment ; 烃源岩 ; source rocks ; 松辽平原 ; Songliao Plain
页码：p.181-191
图表：10 illus., 24 refs.
分类号：1003
issnNo：ISSN1005-2321
isbnNo：CN11-3370/P

摘要

Well SK1 is the first whole coring hole of the Cretaceous strata in China for scientific research. Different layers of shale in the Well SK1 (scientific well) in the Songliao Basin were systematically analyzed by geochemical technique to determine the profile of total organic carbon content (TOC), maturity and depositional environment. The results show that the most organic-rich source rock is the Qingshankou 1st (K₂qn¹) formation with an average of TOC at 3.21％ while most greater than 2％. Qingshankou 2ⁿ^d～3^rd (K₂qn²⁺³) formations, Yaojia member (K_2y) and Nenjiang 1st2^nd (K₂n¹⁺²) formations have subordinate content of organic carbon. The vertical distribution of TOC shows nine HTB (high TOC at the base, decreasing upward) units, indicating the cyclicity of climate, biomass productivity and organic preservation. The source rock of Qingshankou 2ⁿ^d～3^rd formations became mature in the mid-depth with peak oil-generation at 1 500 m.

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