Two new seismic reflection profiles and a deep borehole reveal thin‐skinned thrusting on the easternmost part of the Rheno‐Hercynian zone of the Variscan belt of Europe. Above Precambrian Brunnia basement the profiles show three different seismic zones within the compressed Palaeozoic sedimentary section. The borehole data suggest that the lower zone is a deformed “paraautochthonous” Brunnia basement covered by Upper Devonian and Lower Carboniferous shelf carbonates with numerous local overthrusts. This zone is overthrust by the uppermost seismic zone of Lower Carboniferous Culm flysch wedge and in the west by the eastward dipping zone. This intervening seismic zone on the east end of the profiles is a foreland dipping thrust sheet of another Culm flysch complex (mainly Horni Benesov Formation), or seismic crocodiles in the sense of Meissner (1989). Inverted metamorphism between the Culm flysch and the Brunnia shelf sequences encountered in the well Potstat‐1, and strong slaty cleavage in the intervening zone, suggests that the upper zone is allochthonous, heaving been thrust from deeper levels tens of kilometres eastward over carbonates. Imbrication of the carbonates as part of the footwall suggest relatively strong coupling between the Palaeozoic sediments and underlying basement at the time of thrusting.
The Lobodice underground gas storage (UGS) is developed in a natural aquifer reservoir located in the Central Moravian part of the Carpathian Foredeep in the Czech Republic. In order to learn more about the UGS geological structure a 3D seismic survey was performed in 2009. The reservoir is rather shallow, 400–500 m below the surface. This article describes the process workflow from the 3D seismic field data acquisition to the creation of the geological model. The outcomes of this workflow define the geometry of the UGS reservoir, its tectonics and the sealing features of the structure. Better geological knowledge of the reservoir will reduce the risks involved in the localization of new wells for increasing UGS withdrawal rates.
<p>Searching for oil in Germany is an urgent task, since from its own reserves Germany can cover only four percent of the total volume of oil required for the country's economy. In this regard, we have conducted research with the aim of assessing the prospects of the Rhine Rift oil potential. Were analyzed in basalts Polycyclic Aromatic Hydrocarbons (PAH). The PAH Petroleum Association clearly indicates the presence of petroleum hydrocarbons in rocks and are an indicator of the oil content of deep horizons. The previous report (EGU2020) highlighted the positive factors of oil&#160;&#160; potential in the Rhine Rift. There are favorable geological settings of Rhine Rift, such as seismic activity, new tectonic movements, and presence of basalt, decompressed rocks of mantle, rift stretching mode, and favorable geochemical indications, such as existence of typomorphic oil-associated PAH (Phenanthrene, Chrysene, Pyrene, Benz(a)pyren), presence the components resembling on compositions of Moravia oil . For detailing research conducted mathematical correlation between the non-hydrocarbon components PAH (Naftalen + Homologus, Difenil, Benz (ghi) perylene, Fluorene, Perilen, Antracen, Tetraphen) and hydrocarbon components PAH (Phenanthrene, Pyrene, Chrysene, Benz(a)pyren). Mathematical correlation is 0.041, which is a weak positive relationship on the Chaddock scale. The weak positive relationship between the oil components of PAHs and non-oil components probably indicates that the sources of the oil components of PAHs and non-oil components of PAHs are different. And the source of the oil PAHs is probably the oil fields. Thus the geological-geochemical-mathematical factors point to favorable oil-bearing entrails Rhine Rift<strong>!</strong> For prospecting&#160;&#160; cluster of oil&#160;&#160; in the first instance recommended at areas: Bad Urah, Kaizertuhl-Shellingen <strong>!</strong></p><p>&#160;</p>
The present paper highlights the problem related to the source of hydrocarbons in the Eger Rift in Czech Republic. The authors discuss the existence of polygenetic deep sources of hydrocarbons. The investigations are based on direct indicators of Polycyclic Aromatic Hydrocarbons (abbr. PAHs). Among the diverse components of PAHs has been recognized typomorphic oil association -videlicet: phenanthrene, chrysene, pyrene and benzo(a)pyrene. On the basis of new geochemical, geological and mathematical data the oil and gas potential of Eger Rift is also discussed.
<ul> <li><strong>T</strong>he work was initiated with the aim of assessing the prospects of the Rhine Rift oil potential. The search technique was based on the analysis in basalts of Polycyclic Aromatic Hydrocarbons (PAH) which are an indicator of the oil content of deep horizons. Samples of Rocks were taken from Quarry and Outcrops. PAH analysis was carried out at Moscow State University. All samples contain PAH. 11 components detected. The total amount of the components is 0.052834 mg / kg. Rate of 4 components: Naphthalene and homologous, Phenantren, Difenil, Benz (ghi) perylene is equal more a half of all components (58%). Our study revealed the typical association of PAH, which are characteristic of the oil fields: Phenanthrene, Chrysene, Pyrene, Benz(a)pyren. PAH provide evidence of probable former generation and migration of endogenous hydrocarbons. Existence such components as Phenanthrene, Chrysene, Pyrene, Benz(a)pyren pointed on migrations of Hydrocarbons from depth - (From Oil - deposit?). Samples analyzed show on the existence Hydrocarbons migrations of gases and a more Heavy Hydrocarbons. Favorable geological settings of Rhine Rift, such as seismic activity, new tectonic movements, and presence of Basalt, decompressed rocks of mantle, rift stretching mode, and favorable geochemical indications, such as existence of typomorphic oil-associated PAH (Phenanthrene, Chrysene, Pyrene, Benz(a)pyren), presence the components resembling on compositions of Moravia oil, are positive factors for oil discovery in the Rhine Rift. Data received can serve as base for set detail works for seeking cluster of oil! And in the first instance at areas: Bad Urah, Kaizertuhl-Shellinge<strong>n.</strong></li> </ul>
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