Origin and migration of oil from the Ukrainian Outer Carpathians to their Mesozoic basement: the case of the Lopushna traps
PBN-AR
Instytucja
Wydział Geologii, Geofizyki i Ochrony Środowiska (Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie)
Informacje podstawowe
Główny język publikacji
EN
Czasopismo
Geological Quarterly
ISSN
1641-7291
EISSN
2082-5099
Wydawca
Polish Geological Institute
DOI
Rok publikacji
2016
Numer zeszytu
1
Strony od-do
133--148
Numer tomu
60
Link do pełnego tekstu
Identyfikator DOI
Liczba arkuszy
1.14
Autorzy
Pozostali autorzy
+ 2
Słowa kluczowe
EN
biomarkers
stable carbon isotopes
Ukrainian Carpathians
oil origin
migration pathways
Lopushna oil field
Streszczenia
Język
EN
Treść
The Lopushna oil field has been discovered in Mesozoic-Paleogene strata of the platform basement beneath the Ukrainian Outer (Flysch) Carpathians. Oils from two main accumulations, occurring in Upper Cretaceous sandstone and Upper Jurassic limestone reservoirs, have been analysed in order to identify their origin and relation to the known petroleum systems in the region of the Outer Carpathians and the basement of the Carpathian Foredeep. Results of geochemical investigations of oils, including biomarker and isotopic data, show a good correlation with oils accumulated in Carpathian flysch strata. The oils are low-sulphur and did not undergo significant degradation. They were generated from Type II or II/111 kerogen, deposited in anoxic environments in clastic sediments. Generation occurred at the peak of "oil window", probably in the temperature range of 122 to 126 degrees C. The presence of oleanane indicates Cretaceous or younger source rocks. Good correlation of biomarker and isotopic data with the organic matter dispersed in the Oligocene Menilite Beds occurring at the top of the Carpathian flysch succession allowed identification of these as source rocks for oils of the Lopushna field, which thus can be regarded as an oil family of the Outer Carpathians. The migration distance for both the Lopushna oils and oils accumulated in the Carpathian flysch strata was similar. A number of sub-vertical dislocations, along which the subsided flysch strata occur at the same depth level as the Jurassic and Cretaceous rocks of the platform, can be assumed as possible migration pathways from the mature source rocks of the Oligocene Menilite Beds of the Boryslav-Pokuttya, Skyba or Krosno units to the Lopushna type traps, which suggests the possibility of existence of other hydrocarbon accumulations of this type. The Lopushna field so far is unique in containing this type of oil found in the basement of the Ukrainian Carpathian Foredeep.
Cechy publikacji
original article
peer-reviewed
Inne
System-identifier
idp:103479
CrossrefMetadata from Crossref logo
Cytowania
Liczba prac cytujących tę pracę
Brak danych
Referencje
Liczba prac cytowanych przez tę pracę
Brak danych