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Carbonate Microfacies - Crossref

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Last Updated: 15 November 2022

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Prediction of petrophysical classes and reservoir beds through microfacies and pore types characterization, Tahe Ordovician naturally fractured vuggy carbonates

This research integrates spectral cyclostratigraphy and petrophysical analysis to find prolific reservoir beds in order to maximize reservoir growth. The variation patterns and discontinuity surfaces can be determined by conjointly interpreting the prediction error filter analysis and integrated PEFA as well as synthetic seismic trace and seismogram. The reservoir beds include the reservoir units with connected-vugs-dominated pore systems and microporosity-dominated pore structures, which are prime candidates for secondary recovery processes. With the solution-enlarged porosity zones, the study recommends a total porosity variation model that reveals a change between low/tight and high-porosity horizons, revealing gaps between low/tight and high-porosity horizons, as shown by the change between low/tight and high-porosity horizons. Permeability varies with pore type mixing and rock texture type rather than total porosity. The method used to distinguish flow conduits from baffles and barriers in complex carbonate reservoirs is particularly effective.

Source link: https://doi.org/10.1190/int-2022-0008.1


Reconstruction of tectonically disrupted carbonates through quantitative microfacies analyses: an example from the Middle Triassic of Southern Italy

Abstract of the paper The paper's primary aim is to reconstruct a Middle Triassic buildup that has sprouted out in the southern Apennines' central area. Middle Triassic reefs of the western Tethys region are well-known in the Northern and Southern Alps. This study, which is intended to fill this void and increase the understanding of the Anisian &ucandrobe carbonates of central Mediterranean region, is concentrated on a carbonate buildup growing out in Sasso di Castalda, a carbonate buildup growing out. An increase in the autochthons carbonate toward the top of the succession is shown by a positive linear regression between the sample positions versus the percentage of autochthonous carbonates. According to statistics, units IIIa, IIIb, and I are in stratigraphic order, although unit II appears to have been relocated by tectonic dislocation from its original position at the start of the succession.

Source link: https://doi.org/10.1007/s10347-021-00631-2


The Permian–Triassic boundary section at Baghuk Mountain, Central Iran: carbonate microfacies and depositional environment

The Late Permian Hambast Formation is mainly due to biogenic carbonate production. The Permian biogen-dominated carbonate factory was halted simultaneously with the main mass extinction pulse, which is highlighted by a strong contact between the Hambast-Formation and the overlying Baghuk Member. The Baghuk Member's clay and silt deposits with some carbonate beds show only a few signs of biosynthesis or relics of benthic communities. The deposition of the Baghuk Mountain sediments occurred in a deep shelf environment, most of the time below the storm wave base.

Source link: https://doi.org/10.1007/s12549-021-00511-1


What continued after the mass extinction: insights from carbonate microfacies and biological evolution around the Permian–Triassic boundary in the middle Upper Yangtze Platform, SW China

Abstract At the end of the Palaeozoic Era, most animals on Earth have disappeared completely, and the global sedimentary environment and biology have changed dramatically. In three parts of the Middle Upper Yangtze Platform, SW China, Persi, and Zhijin and Shangsi sections were investigated. The Xingwen well described sedimentary transition from a rimmed carbonate platform to a homoclinal carbonate ramp, as well as a dramatic decrease in sea level right before the PTB in the study area. Evidence from Fossil showed that the Permian biota occurred in the uppermost Changhsingian stage and was overlin by biomicrites with miniaturized ostracods. The major extinction horizon is located up to 14 cm below the PTB, which is located in the middle and lower portions of the miniaturized ostracod layer, according to this.

Source link: https://doi.org/10.1017/s0016756822000632


Upper Jurassic – Lower Cretaceous limestones from the easternmost Getic Carbonate Platform (Southern Carpathians, Romania). Microfacies, microfossils and depositional environments

Good quality outcrops in the Postăvaru and Piatra Mare Massifs feature solid quality outcrops in the Getic Carbonate Platform's easternmost portion of the Getic Carbonate Platform. The Mesozoic succession in Varu Massif is made up of Upper Jurassic−Lower Cretaceous carbonate deposits, which are partially covered by upper Albian−Cenomanian Conglomerates. Callovian−Berriasian olistoliths, embedded in the general mass of the upper Aptian Conglomerates, are embedded in the Piatra Mare Massif's carbonate succession. Varu, Cologne, Valiantti Fetițe-Cabana Postăvaru, Vadi, Valea Dragă, Drumul Albastru, Larga Mare, Văs Trei Feti;e-Poiana Secuilor, Trei Feti;e, Trei Feti;e-Cabana Postțe-Ca Postăvaru;varue;e-Ca;e;ea Postțe;varu Postăvaru;e;e-Poe;e;e;e;e;e;e;e;e;e;e;e, Vțe;e, Drumăe;e;e;e;e;e;e;e;e;e;e;e;e-Ca;e;e;e;e;e;e;e;e;e;e-Po;e Carbonate material was deposit in two distinct depositional conditions, as shown by the identified microfacies types. The presence of numerous C. alpina and various Coscinoconus representatives suggests that deposition continued in the area well into the lower Berriasian period. In the eastern part of the Getic Carbonate Platform and the adjacent flysch troughs, Patrulius D Upper Jurassic− Acknowledgements This work was funded by a grant from the Romanian Ministry of Education and Research, CNCS-UEFISCDI, project number PN-8321; Construction Details of   References   Acknowledgements This work was funded by a grant from the Romanian Ministry of Education and the Acknowledgement Patrulius D, Drăgănescu A, Baltreș; A, Popescu B, Rădan S Carbonate Rocks and Evaporites-Guidebook; Săndulescu, M. , 1964;ndulescu, M. , 1964;ndulescu, M. , 1964. International Colloquium on Carbonate Rocks and Evaporites, Guidebook Series 15, Institute of Geology and Geophysics, Bucharest, pp. 71-82 Săndulescu, M. , 1964. secondulescu M, Patrulius D, ߴs M, Patrulius D, M;tefănescu D, ătefăm;nescu M Geological Map of Romania, scale 1:51 000, BraȘov Sheet, 111 a.

Source link: https://doi.org/10.5194/egusphere-egu22-4119


Biostratigraphy and microfacies of the pelagic carbonates across the Jurassic/Cretaceous boundary in eastern Serbia (Stara Planina–Poreč Zone)

The Stara Planina's integrated micropaleoeconomic and microfacies report on Tithonian and Berriasian pelagic carbonates of Bulgaria's Western Balkan Unit provided a new insight into the stratigraphic ages, depositional configurations, and lateral correlation with Bulgaria's Western Balkan Unit. In the Rosomau010d section in eastern Serbia, a total of forty calpionellid species, nineteen benthic foraminiferal species, and fourteen species of calcareous dinoflagellates have been identified. The Rosoma u010d Limestones were delivered to the Upper Tithonian and Lower Berriasian, as well as the R017ey Limestone Beds to the Upper Berriasian. Vertical microfacies distributions are directly linked to calpionellid and calcareous dinocyst zonations in Serbia and Bulgaria. The pelagic carbonates in the Tithonian-Berriasian boundary interval were deposited under slope and flood conditions at Barlya section in western Bulgaria under basal conditions.

Source link: https://doi.org/10.52321/geolbalc.41.1-3.53


Givetian carbonate microfacies from the Totleben-2 well (Moesian Platform, central North Bulgaria)

In the Givetian dolomite formation from the Totleben-2 well, seven carbonate microfacies types have been identified and characterized. Wilson Universal Microfacies Types SMFT and/or with Givetian microfacies from Wilson's 1975 Standard Microfacies Types SMFT and/or with other shallow-marine Devonian successions from Europe, such as Wilson's 1975 Standard Microfacies Types SMFT and/or with other shallow-marine Devonian successions from Europe.

Source link: https://doi.org/10.52321/geolbalc.45.0.21


Calpionellid biostratigraphy and microfacies analysis of a Tithonian–Berriasian carbonate succession in the Western Srednogorie (Bulgaria)

On the basis of 45 chitinoidellid and calpionellid species, a specialized line of the Western Srednogorie Unit, near Dragovishtitsa Village, has micropalaeontological evidence for late Tithonian and mid-Berriasian age. Both the Salash Formation and the clayey limestone unit covering the Slivnitsa Formation are of mid-Berriasian age. The Crassicollaria Zone and the Alpina Subzone, respectively, correspond to the Slivnitsa and Glozhene formations, which underlie the Salashu2013Cherni Osam Formation in the Dragovishtitsa East section. In both three study sections, the reworking of calpionellids from the Crassicollaria Zone is documented in the Alpina and Elliptica subzones. Slivnitsa Formation is covered by highly diachronous sediments from more distal environments, from mid-Berriasian around Dragovishtitsa Village to the Berriasian/Valanginian transition in the Tri Ushi section to late Valanginian in the Dragoman and Kalotina sections, from mid-Berriasian around Dragovishtitsa Village to late Valanginian in the Dragoman and Kalotina sections, from mid- to calcinian in the Formation is covered by graninian in the Slivni gradiono s from more distal environments: from the Berria Village to the Berria gradinian in the Berria Valley to late Val o in the Ska section's in the Ska section's, and Kalotina sections'sa village to late Val e tansa valley to late Val t and Kalotina section's of the Bha section's'sa section's e titsa section's of Dra.

Source link: https://doi.org/10.52321/geolbalc.46.1.65


Hydrocarbon reservoir development in reef and shoal complexes of the Lower Ordovician carbonate successions in the Tazhong Uplift in central Tarim basin, NW China: constraints from microfacies characteristics and sequence stratigraphy

Hypogenic and mesogenetic dissolution fluids, type 1 from the analysis of hydrocarbon reservoirs in the Lower Ordovician carbonate successions in the Yingshan Formation and shoal facies in the Tazhong Uplift in central Tarim basin showed three varieties of hydrocarbon reservoirs: type 1 associated with synchactric fluids, geothermal/hydrothermal fluids, and thermochemical sulfate reduction-related fluids [mesogenetic and re The O 1 P and O1su20132 Y are made up of seventeen microfacies dedeposited on a shallow marine platform, which are characterized by seventeen microfacies. In O 1 P and O 20132 Y, six main groups of microfacies associations were recognised, with each microfacies group corresponding to the SQ1u2013SQ4 transgressive system tracts and HST.

Source link: https://doi.org/10.1007/s13202-020-00936-y

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions