Petrology and petrography of Neogene sandstone reservoirs of the East Slovakian basin, Czechoslovakia

Conference · Thu Feb 28 23:00:00 EST 1991 · AAPG Bulletin (American Association of Petroleum Geologists); (United States)

OSTI ID:5575482

Gipson, M Jr; Reed, J K ^[1]; Neese, D G ^[2]; Vass, D ^[3]

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1. Univ. of South Carolina, Columbia (United States)
2. Maxus Energy Corp., Dallas, TX (United States)
3. Geologicky Ustav Dionyza Stura, Bratislava (Czechoslovakia)

The Neogene East Slovakian basin forms the northwest depocenter of the Transcarpathian depression. It is a back-arc transtensional basin, approximately 100 km long with up to 7 km of sedimentary fill consisting of shallow-marine to continental clastics and locally abundant volcanities, volcaniclastics, and tuffs. Volcanism was most active during the Miocene (late Badenian to early Sarmatian), with subsidence and sedimentation rates reaching their peak during this period. The sandstones within the basin are primarily immature lithic arenites, commonly up to 8 m thick, derived from the Inner West Carpathians, from local volcanics, and from earlier flysch and molasse sediments. Sandstones are typically composed of very fine- to fine-grained subangular quartz, lithic fragments, and feldspars with accessory micas, chert, pyrite, clays, heavy minerals, and calcite cement. Carbonaceous material is present in many of the sandstones. Porosity has been severely reduced in many of the sandstones by carbonate cementation and alteration of unstable grains. Authigenic clay minerals and zeolites further reduce porosity. A complete paragenetic model has yet to be defined; however, the complexity of the diagenetic/paragenetic relationships suggests multiple episodes of alteration.

• OSTI ID: 5575482
• Report Number(s): CONF-910403--
• Journal Information: AAPG Bulletin (American Association of Petroleum Geologists); (United States), Journal Name: AAPG Bulletin (American Association of Petroleum Geologists); (United States) Vol. 75:3; ISSN AABUD; ISSN 0149-1423
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
03 NATURAL GAS
030200 -- Natural Gas-- Reserves
Geology
& Exploration
58 GEOSCIENCES
580000 -- Geosciences
CENOZOIC ERA
CHERT
CLAYS
CZECHOSLOVAKIA
DEVELOPING COUNTRIES
DIAGENESIS
EUROPE
FELDSPARS
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGIC HISTORY
GEOLOGIC STRUCTURES
GEOLOGY
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
MATERIALS
MICA
MINERAL RESOURCES
MINERALOGY
MINERALS
PARAGENESIS
PETROGRAPHY
PETROLEUM DEPOSITS
PETROLOGY
POROSITY
PYRITE
RESERVOIR ROCK
RESOURCES
ROCK-FLUID INTERACTIONS
ROCKS
SEDIMENTARY BASINS
SEDIMENTARY ROCKS
SEDIMENTATION
SILICATE MINERALS
STRATIGRAPHY
SULFIDE MINERALS
TERTIARY PERIOD
ZEOLITES