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Article

Localisation of Ancient Migration Pathways inside a Fractured Metamorphic Hydrocarbon Reservoir in South-East Hungary

1
Department of Mineralogy, Geochemistry and Petrology, University of Szeged, 6720 Szeged, Hungary
2
Public Limited Company for Radioactive Waste Management (PURAM), 2040 Budapest, Hungary
*
Author to whom correspondence should be addressed.
Appl. Sci. 2020, 10(20), 7321; https://doi.org/10.3390/app10207321
Received: 4 September 2020 / Revised: 14 October 2020 / Accepted: 16 October 2020 / Published: 19 October 2020
(This article belongs to the Special Issue Fractured Reservoirs)
Numerous fractured hydrocarbon reservoirs exist in the metamorphic basement of the Pannonian Basin in Hungary. Many decades of experience in production have proven that these reservoirs are highly compartmentalised, resulting in a complex mosaic of permeable and impermeable domains situated next to each other. Consequently, in most fields, only a small amount of the total hydrocarbon reserve can be extracted. This paper aims to locate the potential migration pathways inside the most productive basement reservoir of the Pannonian Basin, using a multiscale approach. To achieve this, evaluation well-log data, DFN modelling and a composition analysis of fluid trapped in a vein-filling zeolite phase are combined. Data on a single well are presented as an example. The results of the three approaches indicate the presence of two highly fractured intervals separated by a barely fractured amphibolite. The two zones are probably part of the communicating fracture system inside the single metamorphic mass. The gas analysis further specifies the migrated fluids and indicates hydrocarbons of a composition similar to that of the recently produced oil. Consequently, we conclude that the two zones do not only form an ancient migration pathway but are also members of a more recent hydrocarbon system. View Full-Text
Keywords: Pannonian Basin; fractured reservoir; well-log; DFN modelling; fluid inclusion chemostratigraphy Pannonian Basin; fractured reservoir; well-log; DFN modelling; fluid inclusion chemostratigraphy
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MDPI and ACS Style

M. Tóth, T.; Molnár, L.; Körmös, S.; Czirbus, N.; Schubert, F. Localisation of Ancient Migration Pathways inside a Fractured Metamorphic Hydrocarbon Reservoir in South-East Hungary. Appl. Sci. 2020, 10, 7321. https://doi.org/10.3390/app10207321

AMA Style

M. Tóth T, Molnár L, Körmös S, Czirbus N, Schubert F. Localisation of Ancient Migration Pathways inside a Fractured Metamorphic Hydrocarbon Reservoir in South-East Hungary. Applied Sciences. 2020; 10(20):7321. https://doi.org/10.3390/app10207321

Chicago/Turabian Style

M. Tóth, Tivadar; Molnár, László; Körmös, Sándor; Czirbus, Nóra; Schubert, Félix. 2020. "Localisation of Ancient Migration Pathways inside a Fractured Metamorphic Hydrocarbon Reservoir in South-East Hungary" Appl. Sci. 10, no. 20: 7321. https://doi.org/10.3390/app10207321

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