This (ReadMe) file was created on 2026-03-19 by NEŽA MALENŠEK ANDOLŠEK, ANDREJ LAPANJE, SLAVICA MARINOVIĆ & MILOŠ MARKIČ ------------------- GENERAL INFORMATION ------------------- Name of the dataset: Geochemical Assessment of Liquid Hydrocarbon from the Ormož-1g well (NE Slovenia) Author/leading researcher details Name and surname: Neža Malenšek Andolšek ORCID: 0009-0002-4576-7814 Institution: Geological Survey of Slovenia Address: Dimičeva ulica 14, 1000 Ljubljana, Slovenia Email: neza.malensek@geo-zs.si Information about the author(s) Name and surname: Andrej Lapanje ORCID: 0000-0002-9567-1725 Institution: Geological Survey of Slovenia Address: Dimičeva ulica 14, 1000 Ljubljana, Slovenia Email: andrej.lapanje@geo-zs.si Name and surname: Slavica Marinović ORCID: 0000-0001-9256-4142 Institution: INA - Exploration & Production Laboratory Address: Lovinčičeva 4, 10002 Zagreb, Hrvaška Email: slavica.marinovic@ina.hr Name and surname: Miloš Markič ORCID: 0000-0003-2840-9636 Institution: Geological Survey of Slovenia Address: Dimičeva ulica 14, 1000 Ljubljana, Slovenia Email: milosmarkic8@gmail.com Date of data collection: 2024 Geographical location of data collection: N (96): 142,479.55 & E (96): 588,516.29 Information on the funders/programmes/projects that made the data collection possible: INRIGeoTeam project, co-funded by ARIS within the framework of DFP ----------------------------- SHARING/ACCESSING INFORMATION ----------------------------- Data licences/restrictions: CC-BY 4.0 Links to publications that cite or use the data: //paper in Geologija ---------------------- VIEWING DATA AND FILES ---------------------- File list: -composition_Ormož_1g_sample.csv (contains the dataset) - TIC_Ormoz_1g.tif (contains the chromatogram with important peaks) - Gas_chromatogram_Ormoz_1g.tif (contains the chromatogram with important peaks) - mz_99_Ormoz_1g.tif (contains the chromatogram with important peaks) - mz_178_Ormoz_1g.tif (contains the chromatogram with important peaks) - mz_191_Ormoz_1g.tif (contains the chromatogram with important peaks) - mz_192_Ormoz_1g.tif (contains the chromatogram with important peaks) - mz_217_Ormoz_1g.tif (contains the chromatogram with important peaks) - mz_218_Ormoz_1g.tif (contains the chromatogram with important peaks) -------------------------- METHODOLOGICAL INFORMATION -------------------------- Description of the methods used to collect/obtain the data: - American Petroleum Institute (API) gravity is calculated using the following equation: °API= 141.5/〖SG〗_((15.6℃)⁄(15.6℃)) -131.5 - The total sulphur content was determined by the wave dispersive X-ray fluorescence spectrometer (WD-XRF). - Gas chromatographic (GC) analysis of the “whole oil” was performed using an Agilent 7890A gas chromatographer fitted with a 50 m × 0.25 mm i.d. DB-petro column with a film thickness of 0.5 µm, and using helium as the carrier gas. A constant flow mode and a flame ionisation detector (FID) were used. The gas chromatography oven temperature was initially held at 35 ℃ for 10 minutes, then increased to 40 ℃ at a rate of 1℃/min, followed by a ramp to 320 ℃ at 8℃/min, and held at this final temperature for 20 minutes. The results of the chromatographic composition of the identified components are presented as relative surface percentages. - Gas chromatography-mass spectrometry (GC-MS) analysis of the saturated and aromatic fractions of the liquid hydrocarbon was performed using an Agilent MS 5975C quadrupole mass spectrometer interfaced with an Agilent 7890A gas chromatograph. The GC oven temperature was programmed from 60 ℃ to 315 ℃ at a heating rate of 2 ℃/min, with a final hold time of 15 minutes. The MS was operated at an ionisation energy of 70 eV. The saturated and aromatic fractions were dissolved in isooctane and analysed in full-scan mode over a mass range of 50 to 560 amu. - The biomarkers hopanes and steranes were identified using ion chromatograms at m/z 191 and m/z 217 (and m/z 218). - Phenanthrene and methylphenanthrene from the aromatic fraction were identified using ion chromatograms at m/z 178 and m/z 192, respectively. Standards and calibration data: ASTM Standard D2622-24: Standard Test Method for Sulphur in Petroleum Products by Wavelength Dispersive X-ray Fluorescence Spectrometry.