Middle Ordovician organic matter assemblages and their effect on Ordovician-derived oils
Journal Article
·
· AAPG (Am. Assoc. Pet. Geol.) Bull.; (United States)
OSTI ID:6127947
Two distinct Middle Ordovician oil-prone organic-matter assemblages occur in thermally immature to marginally mature petroleum source rocks from Iowa. The substantially more oil-prone Assemblage A generates the unique Ordovician Oil fingerprint, which has been associated with the organic-walled microfossil Gloeocapsamorpha prisca. The second, Assemblage B, generates a more ordinary signature. The two assemblages, which are mixed or interbedded in many Ordovician sediments of North America, explain the variations in oils derived from Ordovician source rocks. These mixtures also aid in interpretation of the chemistry of G. prisca. 7 figures, 2 tables.
- Research Organization:
- Chevron Oil Field Research Co., La Habra, CA (USA)
- OSTI ID:
- 6127947
- Journal Information:
- AAPG (Am. Assoc. Pet. Geol.) Bull.; (United States), Vol. 72:9
- Country of Publication:
- United States
- Language:
- English
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