Facies and Depositional Environments of Miocene Sedimentary Rocks

Szentgyörgyi, K.; Teleki, Paul G.

doi:10.1007/978-94-011-0954-3_4

Cited by 10 publications

(2 citation statements)

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“…This is overlain by different sedimentary rocks ranging from terrestrial to marine Karpatian schlier and mostly Badenian marls. Sarmatian beds are missing in the northern part of the section and in the wider area, but thin (up to 30 metres) brackish marls, locally biogenic limestones and sandstones were encountered in the Békés basin (Szentgyörgyi and Teleki, 1994). A post-Sarmatian basin inversion and erosion is a plausible mechanism to explain these findings, as well as the remarkable vertical offset of pre-Pannonian strata along profile 3.…”

Section: Profilementioning

confidence: 88%

Evolution of the Pannonian basin and its geothermal resources

Musitz²,

et al. 2015

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Section: Profilementioning

confidence: 88%

Evolution of the Pannonian basin and its geothermal resources

Musitz²,

et al. 2015

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“…(formerly known as the Törtel Fm. [10]), and fluvial sandstones of the Zagyva Fm., which form both prolific hydrocarbon reservoirs and also geothermal resources [10][11][12][13]. Strictly speaking, these named 'formations' are lithofacies associations with diachronous boundaries [14], hence the 'interleaved' boundaries in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

Permeability and Mineralogy of the Újfalu Formation, Hungary, from Production Tests and Experimental Rock Characterization: Implications for Geothermal Heat Projects

et al. 2021

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Hundreds of geothermal wells have been drilled in Hungary to exploit Pannonian Basin sandstones for district heating, agriculture, and industrial heating projects. Most of these sites suffer from reinjection issues, limiting efficient use of this vast geothermal resource and imposing significant extra costs for the required frequent workovers and maintenance. To better understand the cause of this issue requires details of reservoir rock porosity, permeability, and mineralogy. However, publicly available data for the properties of reservoir rocks at geothermal project sites in Hungary is typically very limited, because these projects often omit or limit data acquisition. Many hydrocarbon wells in the same rocks are more extensively documented, but their core, log, or production data are typically decades old and unavailable in the public domain. Furthermore, because many Pannonian sandstone formations are poorly consolidated, coring was always limited and the collected core often unsuitable for conventional analysis, only small remnant fragments typically being available from legacy hydrocarbon wells. This study aims to reduce this data gap and to showcase methods to derive reservoir properties without using core for flow experiments. The methods are thin-section analysis, XRD analysis and mercury intrusion porosimetry, and X-CT scanning followed by numerical flow simulation. We validate our results using permeability data from conventional production testing, demonstrating the effectiveness of our method for detailed reservoir characterization and to better constrain the lateral variation in reservoir properties across the Pannonian Basin. By eliminating the need for expensive bespoke coring to obtain reservoir properties, such analysis will contribute to reducing the capital cost of developing geothermal energy projects, thus facilitating decarbonization of global energy supply.

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