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The Zala basin, part of the Pannonian basin system in western Hungary, contains oils reservoired in Triassic through Miocene rocks. Clayton and Koncz<ref name=ch08r6>Clayton, C., J., Bjorøy, M., 1994, Effect of maturity on 13C/12C ratios of individual compounds in North Sea oils: Organic Geochemistry, vol. 21, p. 737–750, DOI: 10.1016/0146-6380(94)90016-7.</ref> examined 21 oil samples and 26 core samples from this basin to determine the number of oil families and the presence of [[source rock]]s, and to propose oil-source correlations. In this case study we discuss one of those correlations.

The Zala basin, part of the Pannonian basin system in western Hungary, contains oils reservoired in Triassic through Miocene rocks. Clayton and Koncz<ref name=ch08r6>Clayton, C. J., and M. Bjorøy, 1994, Effect of maturity on 13C/12C ratios of individual compounds in North Sea oils: Organic Geochemistry, vol. 21, p. 737–750, DOI: 10.1016/0146-6380(94)90016-7.</ref> examined 21 oil samples and 26 core samples from this basin to determine the number of oil families and the presence of [[source rock]]s, and to propose oil-source correlations. In this case study we discuss one of those correlations.

==Geological setting==

==Geological setting==

* A prior study to establish which sedimentary units in the basin are oil source rocks or possess source rock potential.

* A prior study to establish which sedimentary units in the basin are oil source rocks or possess source rock potential.

* Have at least two of the three major groups of geochemical parameters (elemental, [[Wikipedia:Isotope geochemistry|isotopic]], molecular) support the positive correlation before it can be considered valid. (In the case of the NL oils, [[Wikipedia:Isotope geochemistry|isotopic]] and molecular data both support the correlation.)

* Have at least two of the three major groups of geochemical parameters (elemental, [[Wikipedia:Isotope geochemistry|isotopic]], molecular) support the positive correlation before it can be considered valid. (In the case of the NL oils, [[Wikipedia:Isotope geochemistry|isotopic]] and molecular data both support the correlation.)

* Be geologically reasonable, with a migration pathway available between source and reservoir at the time migration occurred.

* Be geologically reasonable, with a [[migration pathway]] available between source and reservoir at the time migration occurred.

==See also==

==See also==

[[Category:Critical elements of the petroleum system]]  

[[Category:Critical elements of the petroleum system]]  

[[Category:Oil–oil and oil–source rock correlations]]

[[Category:Oil–oil and oil–source rock correlations]]