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Oil Source and Entrapment Epoch of the Ordovician Oil Reservoir in the Kongxi Burial‐Hill Zone, Huanghua Depression, North China
Author(s) -
Tieguan WANG,
Feiyu WANG,
Hong LU,
Chiyin YANG,
Qianjin LIAO,
Jiansheng ZHOU
Publication year - 2001
Publication title -
acta geologica sinica ‐ english edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 61
eISSN - 1755-6724
pISSN - 1000-9515
DOI - 10.1111/j.1755-6724.2001.tb00523.x
Subject(s) - ordovician , paleozoic , geology , source rock , paleontology , carbonate , permian , carboniferous , carbonate rock , geochemistry , sedimentary rock , materials science , structural basin , metallurgy
An oil flow obtained from the Middle Ordovician Fengfeng Formation carbonate reservoir in the well KG‐3, Kongxi burial‐hill zone in 1993 marked a breakthrough in petroleum exploration of the high‐mature Lower Palaeozoic strata, North China. Both the Lower member of the Fengfeng Formation and the Second Member of the Upper Majiagou Formation in the Middle Ordovician are supposed to be the main source beds. Oil generation peaks range from 1.0% to 1.6% in R o , showing a “lag effect” of oil generation in high‐mature carbonate source rocks under multicyclic tectonic movement conditions. The Kongxi burial‐hill zone adjoins a potential Ordovician source kitchen. The KG‐3 Ordovician burial‐hill reservoir has undergone two oil filling events, i.e., an early event in the Late Carboniferous‐Permian and a more significant late event in the early Eogene.