| Title: | Carbon isotopic composition of methane and its origin in natural gas from the Petišovci-Dolina oil and gas field (Pannonian Basin System, NE Slovenia) – a preliminary study |
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| Authors: | ID Markič, Miloš (Author)
ID Kanduč, Tjaša (Author) |
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| Files: |  PDF - Presentation file, download (724,51 KB)
MD5: EB68B46DAD3D7F0BD5E9B2BE7C54AC08
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| Language: | English |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: |  GeoZS - Geological Survey of Slovenia
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| Abstract: | The carbon isotopic composition of methane (δ13CCH4) in natural gas from the Petišovci-Dolina oil and gas field (NE Slovenia) was measured for the first time in August and September 2021. The gas samples from different depths were taken from three wells: Dolina-deep (Pg-6) from the depth interval 3102–3104 m, Petišovci-deep (Pg-5) from the depth interval 2772–2795 m, and Petišovci-shallow (D-5) from the depth interval 1212–1250 m. According to the available composition dataset of gas, available from the Petrol Geo d.o.o. documentation, the “deep” gases sampled from the Pg-6 and Pg-5 wells consist of 85 % methane (C1), 11 % hydrocarbons heavier than methane (C2–C6) and 4 % CO2. The “shallow” gas from well D-5 contains more than 89 % methane, up to 11 % C2–C6 gases, while the CO2 content is negligible. The “deep« gas from the Pg-6 and Pg-5 wells has δ13CCH4 -36.7 ‰ and -36.6 ‰, respectively, while the “shallow” gas from the D-5 well has the δ13CCH4 of -38.6 ‰. The methane from the “shallow” gas is slightly enriched in the lighter 12C isotope. δ13CCH4 in the range from -38.6 to -36.6 ‰ clearly indicates the thermogenic origin of methane formed during the catagenesis phase of gas formation. |
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| Keywords: | Petišovci-Dolina, gas, methane, isotopes, origin |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Publisher: | Geološki zavod slovenije |
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| Year of publishing: | 2022 |
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| Number of pages: | str. 59-72 |
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| Numbering: | vol. 65, no. 1 |
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| PID: | 20.500.12556/DiRROS-15332  |
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| UDC: | 553 |
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| ISSN on article: | 0016-7789 |
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| DOI: | 10.5474/geologija.2022.004 |
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| COBISS.SI-ID: | 116539907 |
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| Publication date in DiRROS: | 26.07.2022 |
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| Views: | 1505 |
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| Downloads: | 359 |
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