Three dimensional subsidence thermal maturation and migration history

Three dimensional subsidence, thermal, maturation and migration history model in the Jászság Basin Attila Schlakker Eötvös Loránd University Dept. of Physical and Applied Geology Supervisor: György Pogácsás Dr.

Outline • Study Area • Basin modelling • Subsidence history • Maturation history • Results and conclusion

Study Area boundary • Jászság Basin • 2650 km 2 Seismic line Derecske Trough • • 16 wells 2 D seismic lines Békés Basin Makó Trough Base Pannonian (s. l. ) Modified after Csíky et al. , 1987

Basin modelling After Horváth et al. , 1986

Stratigraphy • Pannonian (s. l. ) (12 -1. 8) and Quaternary sediments • Endrőd Marl: deep basin, neritic • Szolnok Formation: deep basin turbidites • Algyő Formation: delta slope N S a v gy Za ő y lg Újfalu Formation: delta front • Zagyva Formation: delta plain • Quaternary sediments: alluvial plain A Sz ol no k Új fal u • d ő dr En Juhász, 1992 in Haas et al. , 2012 Modified after Császár (ed. ), 1997

Lithologies/Petroleum System Elements Lithostratigraphic unit Depositional environment Lihology Petroleum System Element Quaternary rocks alluvial plain SAND&SHALE reservoir/seal Zagyva Formation delta plain SAND&SILT reservoir/seal Újfalu Formation delta front SANDSTONE reservoir Algyő Formation delta slope SHALE seal Szolnok Formation deep basin turbidites SHALEsand reservoir/seal Endrőd Marl deep basin, neritic MARL source rock

Organic geochemistry • Source rock: Endrőd Marl • Mixed type III (~80%) & Type II (~20%) kerogen • Average TOC: 1. 3 % • Estimated HI: 320 mg HC/g TOC É Base Pannonian (s. l. ) depth map (m) Modified after Csíky et al. , 1987 Endrőd Marl

Geothermics Two Mc. Kenzie Heat Flow models: Moderate HF model: stretching factors – crust: 2, mantle: 4 High HF model: stretching factors – crust 2, mantle: 10 Heat Flow values at the study area (m. W/m 2) É Modified after Horváth et al. , 2004

Heat Flow Calibration Heat Flow values at the study area (m. W/m 2) Modified after Horváth et al. , 2004

Subsidence history 9. 2 Ma 5. 3 Ma 8 Ma 6. 8 Ma Present days zagyvai + kvarter újfalui szolnoki algyői endrődi

Endrőd Formation maturation history High Heat Flow 9. 2 Ma Moderate Heat Flow 8 Ma overmatur e dry gas 6. 8 Ma wet gas oil immature 6. 8 Ma

Endrőd Formation maturation history High Heat Flow 5. 3 Ma Moderate Heat Flow 5. 3 Ma overmatur e dry gas Present days wet gas oil immature Present days

Generated volume of Hydrocarbons (in Million m 3) • Moderate Heat Flow Model: Gas: 1. 5 E 10^6 (=1, 500 Billion m 3) Oil: 141. 52 • High Heat Flow Model: Gas: 7. 19 E 10^6 (=7, 190 Billion m 3) Oil: -2938. 52 (Oil cracked by secondary cracking)

Results and Conclusions • • • Two scenarios: moderate and high Heat Flow models Mainly gas generated from the source rock Generated amount of hydrocarbons: ~5 times more in case of Higher Heat Flow model

Acknowledgement • Hungarian Horizon Energy Ltd. • Schlumberger Ltd. • Dr. György Pogácsás • • János Csizmeg, Levente Szabó, Gábor Varga (HHE Ltd. ) Katalin Milota (MOL Plc. )

Thank you!

References • • Bordenave, M. L. (ed. ) Applied Petroleum Geochemistry (1993): Editions Technip, Paris. 524 pp. Csíky G. , Erdélyi Á. , Jámbor Á. , Kárpátiné Radó D. , Kőrössy L. , 1987: Magyarország pannóniai (s. l. ) képződményei 5. 3 – A peremartoni főcsoport = alsó-pannóniai képződmények talpmélység térképe – Magyar Állami Földtani Intézet, 500 000 -es térkép

Hydrogen Index Estimation M. L. Bordenave, 1993

Paleo Water Depth Horváth et al. , 1986