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Geological model of Lobodice underground gas storage facility based on 3D seismic interpretation

Abstract

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.

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Structural Inversion Magnitude and its Impacts on the Hydrocarbon Accumulation

Abstract

West Wadi El-Rayan is located in the Western Desert at about 140 km SE of Cairo. Also, it lies between Gindi basin to the east and Abu Gharadig basin to the west. In order to construct a 3D structural model and to delineate the subsurface structure styles of the area, seismic structural interpretation and structural restoration are used. The structural geometry within the area is inverted half-graben, since the area was controlled by reactivation of older faults. The magnitude of the inversion-related shortening in the study area was estimated and was suggested to be strong. The result of the strong inversion magnitude occurred toward northeast of the study area can be concluded that, the area suffered shortening and part of the Jurassic / Early Cretaceous normal faults are reactivated as reverse faults. Also the cap, the main reservoirs and the source rock sections are brought to the surface and thus breached, as well any previous mature source rock becoming non-generative where the dry wells are located. However, any less severe inversion structure in this case where producing wells are located that remain buried and will have a better chance or preserving the structure geometry and therefore top and lateral seal.

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Integrated high-resolution stratigraphy of a Middle to Late Miocene sedimentary sequence in the central part of the Vienna Basin

-115. Hinsch R., Decker K. & Peresson H. 2005a: 3-D seismic interpretation and structural modeling in the Vienna Basin: implications for Miocene to recent kinematics. Austrian J. Earth Sci. 97, 38-50. Hinsch R., Decker K. & Wagreich M. 2005b: 3-D mapping of segmented active faults in the southern Vienna Basin. Quat. Sci. Rev. 24, 3-4, 321-336. Hölzel M., Decker K., Zamolyi A., Strauss P. & Wagreich M. 2010: Lower Miocene structural evolution of the central Vienna Basin (Austria). Mar. Petrol. Geol. 27, 3, 666

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