Results 51 to 60 of about 1,174 (182)

Evaluation of porosity, permeability, and reservoir quality of the Asmari Formation using sedimentary facies and diagenesis data in the Ahvaz oil field [PDF]

Journal of Stratigraphy and Sedimentology Researches
The Asmari Formation, the Oligo–Miocene in age, has been deposited in the Dezful Embayment and other parts of the Zagros Basin. In the Ahvaz oil field, this formation is mostly composed of limestones, dolomites, marls, and sandstones.
Akbar Heidari, Narges Shokri, Milad Faraji   +2 more
doaj   +1 more source

Llandovery microfossils and microfacies of the Hýskov section, Prague Basin [PDF]

Fossil Imprint, 2019
Abstract The lower Silurian strata of the Prague Basin, as well as in many other regions, are primarily represented by black shales, with limited to no record of benthic life. In this paper, we describe an exceptional late Aeronian volcanic-carbonate succession from the Hýskov locality near Beroun, which contains a diverse and well-preserved fossil ...
Tonarová, Petra, Vodrážková, Stanislava, Hints, Olle, Männik, Peep, Kubajko, Michal, Frýda, Jiří   +5 more
openaire   +1 more source

Caracterização de Microfácies Sedimentares em Folhelhos da Formação Ponta Grossa (Devoniano) na Borda Leste da Bacia do Paraná [PDF]

Anuário do Instituto de Geociências, 2011
Este estudo objetiva a caracterização de microfácies em afloramentos da borda Leste da bacia do Paraná (34 amostras) representando um trato de sistema transgressivo (20 amostras da parte inferior do Membro Jaguariaíva) e um trato de sistema de mar alto ...
Thiago Gonçalves Carelli, Leonardo Borghi   +1 more
doaj  

Quantification of the Eocene–Oligocene transition in the Zagros Foreland Basin: Palaeogeographic control on sequence architecture and tectonic signal preservation

The Depositional Record, Volume 12, Issue 3, June 2026.
New bio‐sequence framework for the Eocene–Oligocene transition in Zagros. Geochemical data validate basin depth control on SB1 vs. SB2 boundaries. SEM‐EDS analyses confirm subaerial exposure versus continuous deposition. Sensitivity analysis quantifies sub‐10% uncertainty in stratigraphic interpretations. Resolves the Pyrenean orogeny's variable impact
Sahar Rokni, Vahid Ahmadi, Seyed Hamid Vaziri, Ali Aghanabati, Pooria Kianoush   +4 more
wiley   +1 more source

Machine Learning‐Driven Classification and Production Capacity Prediction of Tight Sandstone Reservoirs: A Case Study of the Taiyuan Formation, Ordos Basin

Energy Science &Engineering, Volume 14, Issue 5, Page 2514-2538, May 2026.
On the basis of core and log data, a Bayesian‐Optimized Random Forest model achieved 92.76% accuracy in classifying tight sandstone reservoirs. A gray relational analysis‐derived evaluation index shows > 80% consistency with actual gas zones. ABSTRACT Tight sandstone gas (TSG), an unconventional oil–gas resource, has heterogeneous reservoirs ...
Yin Yuan, Haijiao Fu, Detian Yan, Gang Wang, Shuguang Yang, Mengmeng Liu, Qingling Jiang, Xiaoming Wang, Wei Wang   +8 more
wiley   +1 more source

Microfacies and diagenesis in the Setul Limestone in Langkawi and Perlis [PDF]

Bulletin of the Geological Society of Malaysia, 2013
The Setul limestone outcrops in Langkawi and Perlis show a variety of facies consisting of thickly bedded mudstone, wackestone, packstone, grainstone and dolomitic limestone. Seven microfacies have been recognized comprising of dolomicritic mudstone, bioclastic wackestone, peloidal wackestone, intraclastic wackestone, pelloidal packstone, pelloidal ...
Che Aziz Ali, Kamal Roslan Mohamed
openaire   +1 more source

Microfacies and Depositional Environment of Jeribe Formation (Middle Miocene) in Z -Oilfield Northern of the Salahuddin Governorate

Iraqi Geological Journal
This study aims to diagnose microfacies of the Jeribe Formation to determine depositional environments and derivation depositional model for this formation.
Mustafa Abdullah, Abdulsalam Salih, Faris Hassan   +2 more
doaj   +1 more source

A Millennium of Coastside Occupation. Micromorphological Insights From the Indigenous Site of Las Estacas Cave, Tenerife

Geoarchaeology, Volume 41, Issue 3, May/June 2026.
ABSTRACT The archaeological site of Las Estacas Cave (NW Tenerife, Canary Islands) preserves some of the earliest human occupations in Tenerife, dating to the 2nd century CE, spanning the entire pre‐European time range up to the 15th century. Using soil micromorphology, this study applies a geoarchaeological approach to reconstruct site formation ...
Pedro García‐Villa, Cristo M. Hernández, Carolina Mallol   +2 more
wiley   +1 more source

Microfacies caracteristiques du Trias lorrain

Bulletin de la Société Géologique de France, 1960
Abstract Describes the microfacies of the various detrital, limestone-dolomite, and salt zones in the Triassic of Lorraine, eastern France. These facies are stratigraphically significant in view of the absence of faunal key horizons.
J. de Mautort, Jean Ricour
openaire   +1 more source

Reply to Comment by John J.G. Reijmer, Arnoud Slootman & Max de Kruijf on Baas, J.H., Hewitt, W., Lokier, S. and Hendry, J. (2025) Coming to light: How effective are sediment gravity flows in removing fine suspended carbonate from reefs? The Depositional Record, 11, 583–598. DOI: 10.1002/dep2.319

The Depositional Record, Volume 12, Issue 4, September 2026.
Jaco H. Baas, Stephen Lokier, James Hendry   +2 more
wiley   +1 more source