Origin and migration mechanism of the main hydrocarbon seeps in western Greece

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Published: Jan 1, 2001
DOI: https://doi.org/10.12681/bgsg.17185
Keywords:
oil show or seep source rock migration group of oil Fault unconformity Thrust fault oil well
Κ. Α. ΝΙΚΟΛΑΟΥ
Hellenic Petroleum
Abstract

In this presentation a description of the main hydrocarbon indications of Western Greece is given, in relation to their origin and migration mechanism. Five groups of oil have been defined (Palacas et al.1986, Ν. Rigakis 1999) and their appearance on surface or in wells is explained. Doger shales are the source rocks of the first group of oil seeps in the central Ionian zone in Epirus (Botsara). Migration takes place through inverse or thrust faults. The second group is located at Trifos of Etoloakarnania, and Kyllini and West Katakolon well of NW Peloponissos. It is originated from Lower Cretaceous source rocks and migration happens through active diapiric movements of the Triassic evaporites. Triassic evaporites play important role in the maturation and migration and possible entrapment of this group of oil. The third group has genetic and migration relation with Triassic evaporites and their movements and is found at Delvinaki of Epirus and in the Well South Katakolon, offshore West Peloponissos. The fourth group that appears at Keri and Alikes of Zakynthos Island, it is possible to be originated from Middle- Upper Miocene post-tectonic sediments. The unconformity between Alpine and Post-Alpine sediments and some normal faults, is the possible pathway of migration mechanism. In the same team another oil show at Marathopolis, near Filiatra, is included with some doubts about its real origin. The fifth group is found at Paxos Island in the Preapulian zone. The oil is generated mainly from Middle-Upper Jurassic sediments, while older sediments of Lower Jurassic and Triassic are not excluded as possible source of the oil seeps. It is important to note that the contribution of the ground water movements is important in migration mechanism in some of the described cases. Finally, we strongly believe that the geological sections that are included in the text explain better our results and thoughts.

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References
BRITISH PETROLEUM (BP), 1971,The geological results of petroleum exploration in western Greece: IGRS, Athens, v. 10, 73 p.
ΓΕΩΡΓΑΛΑΣ, Γ.,1922,Αι εν Ηπείρω εμφανίσεις ορυκτών υδρογονανθράκων και αι επ'αυτών ερευνητικαί εργασίαι.: δημοσίευση Γεωλογικού Γραφείου Αθηνών τ.6,50 σ.
ΓΕΩΡΓΑΛΑΣ, Γ., 1937,Υπάρχουν πετρέλαια εν Ελλάδι;:Ανάτυπο χημικών χρονικών,1937,σ.1-72.
IFP-IGRS, 1966,Etude géologique de l'Epire (Grece nord-occidentale): Editions Technip, Paris, France, 306 p.
ΗΡΟΔΟΤΟΣ, 480 π.Χ.,Ιστορίες, Livre IV, Ligne 195,Edit belles letres, France.
ΚΑΜΠΕΡΗΣ, Ε. 1987,Γεωλογική και πετρελαιογεωλογική μελέτη της Β.Δ. Πελοποννήσου: Διδακτορική διατριβή,ΕΜΠ,143 σ.
KARAKITSIOS V.AND RIGAKIS N.,1996,New oil source rocks cut in Greek Ionian basin: Oil & Gas journal, V.94 (7) p.56-59.
KARAKITSIOS, V., 1988, Sur la différenciation de la zone Ionienne en Epire (Grece nord occidentale): Proc.3th Congress, Athens, 1986,Bulletin of the Geological society of Greece, v. XX/2,p.l81-196.
KARAKITSIOS, V. 1990, Chronologie et geometrie de l'overture d'un bassin et de son inversion tectonique: These Doctoral Universite Paris VI, 310 p.
KARAKITSIOS, V. 1995, The influence of preexisting structure and halokinesis on organic matter preservation and thrust system evolution in the Ionian basin, Northwestern Greece: AAPG bulletin, v. 79,p.960-980.
ΚΤΕΝΑΣ, K.,1920,H υδρογονανθρακούχος ζώνη της Δ. Ελλάδος: Υπόμν. Γεωλογικής Υπηρεσίας Ελλάδος, τεύχος Ι,σ.55-86 Αθήνα 1920.
MONOPOLIS, D-BRUNETON,A., 1982,Ionian sea(Western Greece),Its structural outline deduced from drilling and geophysical data: Tectonophysics,v.82,p.227-242.
ΝΙΚΟΛΑΟΥ, Κ.,1986,Συμβολή στη γνώση του Νεογενούς και της γεωλογίας και οριοθέτησης των ζωνών Ιόνιας και Προαπούλιας,σε σχέση με πετρελαιογεωλογικές παρατηρήσεις κυρίως στα νησιά Στροφάδες,Ζάκυνθο και Κεφαλληνία: Διδακτορική διατριβή,Παν.Αθηνών,228 σ.
ΝΙΚΟΛΑΟΥ, Κ.1988,Νεοδιαπειρικές κινήσεις των Τριαδικών εβαποριτών στη Ζάκυνθο και τις Στροφάδες: πρακτ. 3ου γεωλογικού συνεδρίου,Αθήνα,1986,Δελτιο Ελληνικής Γεωλογικής εταιρίας,τομος XX, τεύχος 1,σ.83-99.
NIKOLAOU, K.-CHAMBERLAIN,R.L.- ROEDER,D.H.,(1994), Hydrocarbon Potential of Western Greece,AAPG Annual Convention,Denver Colorado 1994,Oral Presentation.
RENZ, C.,1955,Die vorneogene Stratigraphie der normal-sedimentaren Formationen Griechenlands: Institute for geology and Subsurface Research, Athens, 637 p.
PALACAS, J., MONOPOLIS, D., NIKOLAOU, K, ANDERS, D., 1986,Geochemical correlation of surface and subsurface oils in Western Greece: Org. Geochemistry, v.10, p.417-423.
ΡΗΓΑΚΗΣ, Ν. 1999,Συμβολή στη στρωματογραφική διερεύνηση γεωτρήσεων και τομών των αλπικών σχηματισμών της δυτικής Ελλάδας, σε σχέση με την ικανότητα πετρελαιογένεσης του οργανικού τους υλικού: Διδ. διατριβή,Παν. Αθηνών,236 σ.
TRIKKALINOS, J.,1951,:Uber den Tectonischen Bau und die eutstehung der Erdöllagerstätten des Polylophos- Dragopsa Gebiets von Epirus: Ann. Geol.pays Hell.,V-3,p.l55-184.
WADE,A.,1932,:The geology of Zante and its ancient oil field: Journ.Inst. Petr. Technol.. V.18 p.1-36.