Results 51 to 60 of about 700 (192)
Distribution of Upper Paleozoic Coal Seams in the Southeastern Ordos Basin
Energies, 2022 The Ordos Basin contains abundant coal resources in the Upper Paleozoic strata. They are shallowly buried or exposed in the periphery of the basin, forming recoverable coal mines and coalbed methane resources.
Yunwen Guan +5 more
doaj +1 more source
Geofluids, Volume 2017, Issue 1, 2017., 2017 Oil and gas have been found in the Upper Ordovician Lianglitag Formation carbonates in the Tahe Oilfield, Tarim Basin, NW China. This study documents the origin of diagenetic fluids by using a combination of petrology, SIMS, fluid inclusion, and radiogenic isotope analysis. Six stages of calcite cements were revealed.
Jiaqing Liu +4 more
wiley +1 more source
Geofluids, Volume 2017, Issue 1, 2017., 2017 Two fundamental forms of hypogenic karst systems (lateral stratiform hypogenic and cross‐formational fault‐vein hypogenic karst system) are distinguished mainly by differential effects of preexisting faults. In seismic cross sections, hypogenic karst systems are expressed as complex string-beads‐like seismic reflections associated with faults.
Hongtao Zhu +3 more
wiley +1 more source
A Modelling Workflow for Seismic Characterization of Paleokarst Reservoirs [PDF]
, 2018 Karst is a type of landscape formed by dissolution of soluble rocks such as carbonates. Caves are common subsurface karst features and develop where water percolates through the host rock and creates cave-passages through dissolution.
Johansen, Martin Kyrkjebø
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Perfiles paleokarsticos en el techo de la unidad intermedia del mioceno de la cuenca de Madrid
Estudios Geologicos, 2003 En el techo de la Unidad Intermedia del Mioceno de la Cuenca de Madrid se ha desarrollado un paleokarst temprano, somero y de forma tabular que muestra un marcado control litológico y del dispositivo de facies deposicionales en su génesis.
J. C. Cañaveras +6 more
doaj +1 more source
Geo-modeling and fluid flow simulation in paleokarst reservoirs [PDF]
, 2015 This master thesis focuses on modeling and simulation of fluid flow in collapsed paleocave systems, also known as paleokarst. Petroleum reservoirs all around the world exhibit karst structures.
Furnée, Jon Petter Bjerkreim
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Rebliment sedimentari d'un Paleokarst. Formació Utrillas. Terra Alta, Tarragona. [PDF]
, 2019 Es tracta de descriure, analitzar i interpretar un conjunt de materials terrígens i siliciclàstic que rebleixen un paleokarst. Aquest està situat sota la discordança basal de la Formación Utrillas. A la serra de Cavalls (Terra Alta), entre les localitats
Martorell Melià, Caterina Maria
core +1 more source
Ancient karst at the eastern slope of the Middle Urals and the Early-Middle Carboniferous boundary
Литосфера, 2016 The paleokarst occurrences associated with Lower Carboniferous limestones in the east of the Middle Urals are considered. We analyse the nature of the Early-Middle Carboniferous boundary.
G. A. Mizens +3 more
doaj +2 more sources
Estudios Geologicos, 1997 Los materiales carbonáticos y evaporíticos del techo de la Unidad Intermedia del Mioceno de la Cuenca de Madrid han actuado como soporte de fenómenos de karstificación temprana, cuyo desarrollo ha supuesto un cambio significativo en la evolución del ...
J. C. Cañaveras +3 more
doaj +1 more source
地质科技通报, 2022 The characteristics of carbonate paleokarst cave and filling have always been the difficulty of characterization and modelling. Based on the seismic, geological and logging data, this paper puts forward the idea of three-level progressive modelling of ...
Wenbiao Zhang +5 more
doaj +1 more source