Basin-centred gas in the Makó Trough, Hungary: a 3D basin and petroleum system modelling investigation

Badics, Balázs; Uhrin, András; Vetö, István; Bartha, Attila; Sajgó, Csanád

doi:10.1144/1354-079310-063

Cited by 10 publications

(13 citation statements)

References 14 publications

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“…Present-day temperature at the top of the Algyő Formation (~2500 m) is 100 °C, whereas at the bottom of the Endrőd Formation (5500 m), it is 210 °C [24]. Heat flow values are as high as 100-130 mW/m 2 [38].…”

Section: Geological Settingmentioning

confidence: 98%

“…In the Neogene of the Pannonian Basin, the oil generation window is located in a depth range of 2.4-4.3 km [40,47]. Badics et al [24] estimated the generated volume of hydrocarbons in the Makó Trough by assessing the hydrocarbon potential of source rocks, thermal maturity history, and timing of hydrocarbon generation. The potential shale gas interval is buried to 5000-6000 m and has a temperature of 225-270 °C.…”

Section: Hydrocarbon System Of the Makó Trough The Endrődmentioning

confidence: 99%

“…The potential shale gas interval is buried to 5000-6000 m and has a temperature of 225-270 °C. To summarize, the calcareous part of the Endrőd Formation can be considered a fair quality, gas-prone source rock [24]. The largest oil and gas field in Hungary, the Algyő Field, is situated southwest of the Makó Trough [40,48] and was sourced from there.…”

Section: Hydrocarbon System Of the Makó Trough The Endrődmentioning

confidence: 99%

“…The studied cores were cut in the basin centre and on the northeastern/eastern hanging wall flank. During diagenesis, the meteoric water recharge-through subaerially exposed, topographically elevated blocks-which would have supplied additional light oxygen isotope, can be ruled out based on the facies reconstruction and the continuous burial of the deposits in the Makó Trough [22,24]. Gradual transgression resulted in flooding of almost the entire Pannonian Basin, including the adjacent basement highs of the Makó Trough, at the stage of deposition of the Endrőd Formation [32].…”

Section: Interpretation Of Stablementioning

confidence: 99%

“…In the early 2000s, unconventional hydrocarbon exploration focused on potential basin-centered gas and shale-gas accumulations in the Upper Miocene deposits of the Makó Trough [23]. Although the exploration activity did not result in any economic discoveries, it allowed gathering vast amounts of samples and data [24]. Studies focused on the sedimentary architecture, geophysical, and organic geochemical properties of these deposits [23,25,26].…”

Section: Introductionmentioning

confidence: 99%

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Porosity Development Controlled by Deep-Burial Diagenetic Process in Lacustrine Sandstones Deposited in a Back-Arc Basin (Makó Trough, Pannonian Basin, Hungary)

et al. 2020

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Deeply buried Pannonian (Upper Miocene) siliciclastic deposits show evidence of secondary porosity development via dissolution processes at a late stage of diagenesis. This is demonstrated by detailed petrographic (optical, cathodoluminescence, fluorescence, and scanning electron microscopy) as well as elemental and stable isotope geochemical investigations of lacustrine deposits from the Makó Trough, the deepest depression within the extensional Pannonian back-arc basin. The analyses were carried out on core samples from six wells located in various positions from centre to margins of the trough. The paragenetic sequence of three formations was reconstructed with special emphasis on sandstone beds in a depth interval between ca 2700 and 5500 m. The three formations consist, from bottom to top, of (1) open-water marls of the Endrőd Formation, which is a hydrocarbon source rock with locally derived coarse clastics and (2) a confined and (3) an unconfined turbidite system (respectively, the Szolnok and the Algyő Formation). In the sandstones, detrital grains consist of quartz, feldspar, and mica, as well as sedimentary and metamorphic rock fragments. The quartz content is high in the upper, unconfined turbidite formation (Algyő), whereas feldspars and rock fragments are more widespread in the lower formations (Szolnok and Endrőd). Eogenetic minerals are framboidal pyrite, calcite, and clay minerals. Mesogenetic minerals are ankerite, ferroan calcite, albite, quartz, illite, chlorite, and solid bituminous organic matter. Eogenetic finely crystalline calcite yielded δ13 C V − PDB values from 1.4 to 0.7‰ and δ18 O V − PDB values from –6.0 to –7.4‰, respectively. Mesogenetic ferroan calcite yielded δ13 C V − PDB values from 2.6 to –1.2‰ and δ18 O V − PDB values from –8.3 to –14.0‰, respectively. In the upper part of the turbidite systems, remnants of the migrated organic matter are preserved along pressure dissolution surfaces. All these features indicate that compaction and mineral precipitations resulted in tightly cemented sandstones prior to hydrocarbon migration. Interconnected, secondary, open porosity is associated with pyrite, kaolinite/dickite, and postdates of the late-stage calcite cement. This indicates that dissolution processes took place in the deep burial realm in an extraformational fluid-dominated diagenetic system. The findings of this study add a unique insight to the previously proposed hydrological model of the Pannonian Basin and describe the complex interactions between the basinal deposits and the basement blocks.

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Section: Geological Settingmentioning

confidence: 98%

Section: Hydrocarbon System Of the Makó Trough The Endrődmentioning

confidence: 99%