Article
Geology
Ottilia Szives, Josep A. Moreno-Bedmar, Beatriz Aguirre-Urreta, Miguel Company, Camille Frau, Mikel Lopez-Horgue, Antoine Pictet, Izabela Ploch, Christian Salazar, Ricardo Barragan, Jean -Louis Latil, Jens Lehmann, Stephane Reboulet, Emmanuel Robert
Summary: The 7th meeting of the IUGS Lower Cretaceous Ammonite Working Group discussed important changes in the geological age classification, including adjustments and improvements to the upper Tithonian-Berriasian, upper Aptian, and Albian stages. The meeting also discussed the Valanginian and Hauterivian stages, and provided discussions on zonal indices and units, emphasizing the use of interval zones and subzones.
CRETACEOUS RESEARCH
(2024)
Article
Geography, Physical
Kseniya Mikhailova, Mikhail Rogov, Victoria Ershova, Oleg Vereshchagin, Olga Shurekova, Anna Feodorova, Victor Zakharov
Summary: This study describes glendonites of Middle-Late Jurassic to Early Cretaceous age from the Barents Shelf, including the first discovery of Late Barremian-Early Aptian age glendonites. The detailed mineralogical-geochemical and isotopic studies revealed differences in composition between different types of calcite in the pseudomorphs.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2021)
Article
Geosciences, Multidisciplinary
Aslaug C. Glad, Frederic Amour, Michael J. Welch, Ole R. Clausen, Kresten Anderskouv, Jon R. Ineson, Emma Sheldon, Hamidreza M. Nick
Summary: Natural fractures and discontinuities significantly impact the flow conditions and oil production in the Lower Cretaceous reservoirs in the Danish North Sea, especially in low-permeability sediments. The Valdemar Field in the Danish Central Graben is the only producing field in this region, with different types of natural fractures identified, where open fractures and small-offset shear fractures are flow-enhancing.
MARINE AND PETROLEUM GEOLOGY
(2022)
Article
Geology
Jens Lehmann, H. Mark Bayliss
Summary: Tropaeum (Tropaeum) evolutum is a new species characterized by remarkably evolute coiling, with a body-chamber of rather more than half a whorl and fourteen widely spaced primaries.
CRETACEOUS RESEARCH
(2022)
Article
Geology
Ottilia Szives, Istvan Fozy
Summary: This paper discusses the debated ammonite taxonomy and stratigraphy of the late Tithonian-early Berriasian period in the Mediterranean region and proposes an updated ammonite zonal scheme for this time interval.
NEWSLETTERS ON STRATIGRAPHY
(2022)
Article
Geosciences, Multidisciplinary
Chloe C. F. Chateau, Shahin E. Dashtgard, James A. MacEachern
Summary: This study analyzes the Lower Cretaceous McMurray Formation in the Western Canada Sedimentary Basin and finds that the deposition occurred in a low-accommodation space setting, primarily controlled by the transgression of the Boreal Sea. The variations in thickness of depositional units (DU) correlate with changes in the marine expression of transgressive mudstone, suggesting an acceleration in the rate of the Boreal Sea transgression.
MARINE AND PETROLEUM GEOLOGY
(2021)
Article
Geology
Valeria S. Perez Loinaze, Magdalena Llorens, Jose I. Cuitino, M. Veronica Guler, Juan Cruz Villan
Summary: Palynomorph assemblages recovered from the upper levels of the Cretaceous Rio Mayer Formation in the Rio Lista area, southern Argentina, suggest an early Aptian age and a progressively shallowing marine setting for deposition of the unit, as evidenced by the decrease in abundance of marine elements and the increase of Pterospermella. These interpretations are consistent with sedimentological analyses of the same stratigraphic section.
CRETACEOUS RESEARCH
(2021)
Article
Geology
Ricardo Barragan, Josep A. Moreno-Bedmar, Fernando Nunez-Useche, Leon F. Alvarez-Sanchez, Gerard Delanoy
Summary: This study examined the ammonite record of two stratigraphic sections in Nuevo Leon State, northeast Mexico, aiming to develop an independent ammonite zonation for the Central Atlantic Province. The study identified three ammonite zones and one subzone, and introduced methodologies such as semi-quantitative biostratigraphy and the use of 3D models. The research also discussed the lower/upper Aptian transition in Mexico and Europe, proposing study options for better characterizing the transition and its correlation between the two regions.
CRETACEOUS RESEARCH
(2021)
Article
Energy & Fuels
Dawod S. Almayahi, James H. Knapp, Camelia Knapp
Summary: The geological storage of CO2 in the Earth's subsurface has the potential to significantly offset greenhouse gas emissions. Offshore CO2 storage is an attractive alternative and this study provides the first comprehensive investigation and quantitative assessment of the offshore storage resource in the southeastern United States. It identified and assessed three target reservoirs and estimated the CO2 storage capacity.
Article
Geology
Andrew Scott Gale, Jenny Marie Rashall, William James Kennedy, Frank Koch Holterhoff
Summary: The stratigraphy of the upper Fredericksburg and lower Washita groups in northern Texas and southern Oklahoma is described in the paper, along with biostratigraphical correlation using microcrinoids, ammonites, planktonic foraminiferans, and inoceramid bivalves. The taxonomy of roveacrind microcrinoids is revised, new species and formae are described, and a new roveacrinid zonation for the middle and upper Albian (zones AlR1-12) is proposed, showing rapid speciation.
ACTA GEOLOGICA POLONICA
(2021)
Article
Biodiversity Conservation
James D. Witts, Corinne E. Myers, Matthew P. Garb, Kayla M. Irizarry, Ekaterina Larina, Anastasia Rashkova, Neil H. Landman
Summary: This study examines the temporal and spatial variation in the morphology of the ammonoid cephalopod Discoscaphites iris. The results suggest that there is no net accumulation of evolutionary change in morphology within this species. However, there may be limited population-scale ecophenotypic plasticity. The lack of directional changes in morphology before the K/Pg boundary supports a model of dynamic evolutionary stasis.
Article
Geosciences, Multidisciplinary
Lewis Whiting, Peter D. W. Haughton, Patrick M. Shannon
Summary: Hyperextended basins are increasingly recognized as aborted basins created during continental break-up. This study of the Porcupine Basin in offshore west of Ireland reveals multiple rift segments with distinctive geometries and strain histories. The transition from hyperextension to post-rift subsidence in this basin is marked by unconformity-bounded marine sequences. Hyperextension may have left the basin susceptible to intra-plate stress changes, resulting in several unconformities within the post-rift fill.
Article
Paleontology
Stephane Bersac, Didier Bert
Summary: This study examines the Ammonitoceras from the Lower Cretaceous Les Ferres Basin in southeastern France and describes their ontogenetic sequence and intraspecific variability. Two species are identified, with differences in the duration of the Ammonitoceras stage. However, species identification is not possible for a sample from one subzone due to fragmentary specimens.
ANNALES DE PALEONTOLOGIE
(2022)
Review
Geology
E. M. Pervushov, I. P. Ryabov, V. B. Sel'tser, I. Walaszczyk, E. A. Kalyakin, A. A. Guzhikova, E. I. Il'inskii, D. V. Khudyakov
Summary: The vertical ranges of various fossil groups in carbonate rocks have been studied in the Kommunar section. The results confirm and complement the previous research data and provide new insights into the stratigraphy of the region.
STRATIGRAPHY AND GEOLOGICAL CORRELATION
(2022)
Article
Computer Science, Artificial Intelligence
Ekaterina Gurina, Nikita Klyuchnikov, Ksenia Antipova, Dmitry Koroteev
Summary: We present a data-driven and physics-informed algorithm for real-time drilling accident forecasting, which can predict the probabilities of six types of accidents. The model, trained on past drilling accidents, can forecast 70% of the accidents with a false positive rate of 40%, addressing partial prevention of accidents during well construction.
APPLIED INTELLIGENCE
(2022)
Article
Geology
Fernando Barroso-Barcenilla, Melani Berrocal-Casero, Pedro M. Callapez, Miguel Company Sempere, Fernando Perez-Valera, Juan Alberto Perez-Valera
Summary: The Lower Cretaceous Bolos Sandstone Formation in southeastern Spain yielded ornamented nautiloids and other cephalopods and invertebrates. The fossils include species like Cymatoceras neocomiense and Eucymatoceras plicatum, with the former being recorded for the first time in the Pseudothurmannia catulloi Subzone. The paleoecological characteristics suggest a shallow to moderately deep paleoenvironment with mixed sedimentation.
CRETACEOUS RESEARCH
(2022)
Article
Energy & Fuels
Ivan Makhotin, Denis Orlov, Dmitry Koroteev
Summary: This study demonstrates the applicability of machine learning in evaluating the outcome of waterflooding, as well as the relationship between operator evaluations and performance metrics. The results show that machine learning models can reduce computational complexity and are useful for rating the effectiveness of waterflooding.
Article
Energy & Fuels
E. Illarionov, P. Temirchev, D. Voloskov, R. Kostoev, M. Simonov, D. Pissarenko, D. Orlov, D. Koroteev
Summary: This paper introduces a unified approach to reservoir simulation and adaptation problems, utilizing a neural network model for forward pass and backward gradient propagation, combining model fitting and geological parameter adjustment into the same optimization problem. By utilizing real-world oilfield models and historical production rates, it demonstrates a significant acceleration in simulation speed.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Computer Science, Interdisciplinary Applications
Evgeny E. Baraboshkin, Andrey E. Demidov, Denis M. Orlov, Dmitry A. Koroteev
Summary: An innovative method and algorithm for extracting core columns from core boxes is proposed in this study to improve the efficiency of automated full-bore rock core image analysis. By simulating different environments and using template-like augmentation technology, the accuracy and effectiveness of machine learning algorithms are enhanced. This method can significantly accelerate core box processing.
COMPUTERS & GEOSCIENCES
(2022)
Article
Energy & Fuels
Nikita Klyuchnikov, Leyla Ismailova, Dmitry Kovalev, Sergey Safonov, Dmitry Koroteev
Summary: This study investigates the applicability of Generative Adversarial Networks (GANs) for generating synthetic data related to well construction and geological characterization. The findings suggest that quantitative mathematical metrics can be used as proxies for expert perception, reducing the need for manual annotation during the GAN model selection process.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Multidisciplinary Sciences
Petra Lukeneder, Alexander Lukeneder
Summary: This study examines fossil material from Austria and Italy, revealing the presence of cartilage structures similar to those seen in recent animals. These structures are identified as cephalic cartilage belonging to the belemnoid Phragmoteuthis bisinuata, and show similarities to the cephalic cartilage of modern coleoids.
Article
Multidisciplinary Sciences
Alexander Lukeneder, Petra Lukeneder
Summary: The taphonomic mechanisms of a mono- to pauci-specific ammonoid fauna from Polzberg Konservat-Lagerstatte in Austria were studied. Abundant nektic ammonoids, bivalves, coleoids, and actinopterygian fish were found in the fossiliferous layers. The presence of vertically oriented ammonoid shell fragments suggests deposition after lethal fish or coleoid attacks. The Polzberg ammonoids were deposited under calm and dysoxic conditions.
SCIENTIFIC REPORTS
(2022)
Article
Multidisciplinary Sciences
Gerhard W. Weber, Alexander Lukeneder, Mathias Harzhauser, Philipp Mitteroecker, Lisa Wurm, Lisa-Maria Hollaus, Sarah Kainz, Fabian Haack, Walpurga Antl-Weiser, Anton Kern
Summary: The origin and key details of the 30,000 year old Venus from Willendorf have been revealed through new scanning technology. The study also suggests the possibility of long-distance artifact transportation by the Gravettian people before the Last Glacial Maximum.
SCIENTIFIC REPORTS
(2022)
Article
Multidisciplinary Sciences
Strahinja Markovic, Jonathan L. Bryan, Reza Rezaee, Aman Turakhanov, Alexey Cheremisin, Apostolos Kantzas, Dmitry Koroteev
Summary: Water saturation determination is a challenging task in petrophysical well-logging, and low-field nuclear magnetic resonance (LF-NMR) measurements provide reliable evaluation. In this study, machine learning models were developed to predict the relative water content in oil-sand samples using LF-NMR spin-spin (T-2) relaxation and bulk density data.
SCIENTIFIC REPORTS
(2022)
Article
Energy & Fuels
Ekaterina Gurina, Nikita Klyuchnikov, Ksenia Antipova, Dmitry Koroteev
Summary: This paper presents an approach for interpreting a black-box alarming system for forecasting accidents and anomalies during the drilling of oil and gas wells. The approach uses an explanatory model that explains the local behavior of the accident predictive model to drilling engineers. The validation results show that the explanatory model has higher precision and recall compared to a random baseline and multi-head attention neural network, indicating better alignment with drilling engineers' explanations.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Environmental Sciences
Mohammad Ebadi, Ryan T. Armstrong, Peyman Mostaghimi, Ying Da Wang, Naif Alqahtani, Tammy Amirian, Lesley Anne James, Arvind Parmar, David Zahra, Hasar Hamze, Dmitry Koroteev
Summary: This paper proposes a fully automated workflow based on soft computing to characterize the heterogeneous flow properties of cores and build predictive continuum-scale models. The workflow classifies rock types using image features and morphological properties, and evaluates petrophysical properties through pore-scale simulations. Experimental results demonstrate the high-fidelity characterization provided by this workflow.
WATER RESOURCES RESEARCH
(2022)
Article
Energy & Fuels
Arman Najafi, Javad Siavashi, Mohammad Ebadi, Denis Orlov, Mohammad Sharifi, Jalal Fahimpour, Mostafa Keshavarz Moraveji, Dmitry Koroteev
Summary: Global warming is considered a severe crisis in the coming years, and Carbon Capture and Storage (CCS) has been proposed as a feasible solution. For the successful implementation of CCS, it is crucial to understand the relevant mechanisms, particularly the multiphase flow. Relative permeability is recognized as a parameter to describe the physics of multiphase flow. However, previous studies have shown that microscopic phenomena strongly influence relative permeability data. This research uses micro X-ray Computed Tomography (mu xCT) and Computational Fluid Dynamics (CFD) to analyze the impact of pore geometry on relative permeability data.
Article
Engineering, Petroleum
Anna Gubanova, Denis Orlov, Dmitry Koroteev, Sergei Shmidt
Summary: We introduce a new large-scale production forecast model that addresses the complex treatment of wellbores. The model predicts multiphase flow rates based on historical data and well treatment information, and provides preferred transmissibility trends and information about sealed or leaking faults. The model features time-dependent weight coefficients and fast calculations, making it suitable for modeling real oil fields with a large number of wells and complex production control systems.
Article
Physics, Fluids & Plasmas
Denis Volkhonskiy, Ekaterina Muravleva, Oleg Sudakov, Denis Orlov, Evgeny Burnaev, Dmitry Koroteev, Boris Belozerov, Vladislav Krutko
Summary: In this paper, a deep learning architecture is proposed for the reconstruction of three-dimensional porous medium structures from two-dimensional slices. By fitting a distribution based on a given dataset, samples with similar properties are generated. Numerical experiments show that this method achieves good reconstruction results.
Article
Geology
Jimmy de Rooij, Sybrand A. N. Lucassen, Charlotte Furer, Anne S. Schulp, P. Martin Sander
Summary: This study presents a detailed osteohistological analysis on Triceratops horridus and Triceratops cf. prorsus specimens, aiming to understand the growth and development of ceratopsids. The analysis reveals a distinct pattern of bone tissue growth in Triceratops limb elements, but also suggests that taxonomic ambiguity between Torosaurus and Triceratops cannot be solely resolved based on histological data.
CRETACEOUS RESEARCH
(2024)
Review
Geology
J. R. Ovando-Figueroa, J. A. Moreno-Bedmar, M. Company, J. A. Jacobo-Delgado
Summary: This article presents a review of ammonoid specimens from the Berriasian and Valanginian age in Zacatecas, Mexico. The study includes updated museographic information, new images, and 3D models of the specimens. Taxonomic identification has revealed six species and two genera. Stratigraphic range data suggests that the specimens belong to the uppermost upper Berriasian to lower Valanginian interval, with several biozones identified. Additionally, a paleobiogeographic analysis indicates a clear affinity with contemporaneous ammonoid assemblages from the Mediterranean region.
CRETACEOUS RESEARCH
(2024)
Article
Geology
Jake Kotevski, Ruairidh J. Duncan, Adele H. Pentland, James P. Rule, Patricia Vickers-Rich, Thomas H. Rich, Erich M. G. Fitzgerald, Alistair R. Evans, Stephen F. Poropat
Summary: The cranial remains of non-avian theropod dinosaurs from the Cretaceous period in Australia are poorly understood. This study presents new evidence of non-mandibular cranial material, possibly belonging to the Megaraptoridae family, and contributes to the limited knowledge of Australian Cretaceous theropod cranial remains.
CRETACEOUS RESEARCH
(2024)
Article
Geology
Josh Jenkins Shaw, Alexey Solodovnikov, Evgeny E. Perkovsky
Summary: A fossil of the monogeneric rove beetle subfamily Trichophyinae (genus Trichophya) has been discovered in the Upper Cretaceous Taimyr amber from northern Siberia. This finding indicates the morphological differences between ancient and modern Trichophya species groups. By comparing the morphology, distribution, and habitat requirements of extant species, the taxonomy, biogeography, and paleoecology of the Trichophya in Taimyr amber can be better understood.
CRETACEOUS RESEARCH
(2024)
Article
Geology
Martin Kostak, Frank Wiese, Zuzana Kozlova, Adam Culka, Martin Mazuch, Martin Soucek
Summary: A well-preserved fossil of an upper Cretaceous acanthoceratoid ammonite has been discovered in the Bohemian Cretaceous Basin, providing important insights into the jaw anatomy of these extinct organisms.
CRETACEOUS RESEARCH
(2024)
Article
Geology
Gustavo Santiago, Marcelo de Araujo Carvalho, Renato Rodriguez Cabral Ramos, Sandro Marcelo Scheffler
Summary: The Santa Marta Formation in the Antarctic Peninsula is an important sedimentary sequence that provides insights into paleoenvironmental changes. The distribution of sedimentary organic matter reveals three distinct palynofacies associations and shows a progressive transgression from terrestrial to marine environments.
CRETACEOUS RESEARCH
(2024)
Article
Geology
B. J. Vazquez, D. Castanera, B. Vila
Summary: In Europe, the fossil record of sauropods in the uppermost Cretaceous is mainly found in Spain, France, and Romania. Recently, a significant discovery of titanosaurs' teeth was made in Els Nerets, Spain, which contains the largest tooth sample from the Late Cretaceous in Europe. The teeth show distinct characteristics but cannot be attributed to any known European species. Based on tooth morphology and wear facets distribution, a new taxon is proposed.
CRETACEOUS RESEARCH
(2024)
Article
Geology
Youssef S. Bazeen, Walid G. Kassab, El Sayed M. Moneer, Gebely A. Abu El-Kheir, Mohamed K. Abdelgawad, Haitham M. Ayyad
Summary: This study investigates the Maastrichtian-Danian succession in the Abu Minqar section of the Western Desert of Egypt, using an integrated analysis of biostratigraphy and chemostratigraphy. The results suggest that regional tectonics played a substantial role in the depositional history and paleoenvironmental circumstances of the southern Tethys margin.
CRETACEOUS RESEARCH
(2024)
Article
Geology
Fernando R. Rios, Ana M. P. Mizusaki, Rualdo Menegat, Isaque C. Rodrigues
Summary: This study examines the temporal and spatial relationships between fluvio-aeolian, aeolian, and volcanic systems in the southernmost part of the Parana Basin during the Late Jurassic and Early Cretaceous. By analyzing facies and architectural elements, the evolution of the volcano-sedimentary record is reconstructed.
CRETACEOUS RESEARCH
(2024)
Article
Geology
Antonio M. Casas, Arsenio Munoz, Alberto Tella, Carlos L. Liesa
Summary: This work proposes the application of magnetic surveying to study the cyclicity in sedimentary basins. Through measuring the total magnetic field and vertical magnetic gradient, the short-wavelength magnetic anomalies associated with the sedimentary sequence can be analyzed, providing information about the magnetic susceptibility and magnetic remanence of different sedimentary units. The cyclostratigraphic analysis reveals the existence of various cycles and enables the dating of the basin fill, offering new constraints for basin evolution.
CRETACEOUS RESEARCH
(2024)
Article
Geology
Ottilia Szives, Josep A. Moreno-Bedmar, Beatriz Aguirre-Urreta, Miguel Company, Camille Frau, Mikel Lopez-Horgue, Antoine Pictet, Izabela Ploch, Christian Salazar, Ricardo Barragan, Jean -Louis Latil, Jens Lehmann, Stephane Reboulet, Emmanuel Robert
Summary: The 7th meeting of the IUGS Lower Cretaceous Ammonite Working Group discussed important changes in the geological age classification, including adjustments and improvements to the upper Tithonian-Berriasian, upper Aptian, and Albian stages. The meeting also discussed the Valanginian and Hauterivian stages, and provided discussions on zonal indices and units, emphasizing the use of interval zones and subzones.
CRETACEOUS RESEARCH
(2024)
Article
Geology
Felix Schlagintweit, David Gercar, Bostjan Rozic
Summary: A mixed assemblage of planktonic and benthonic foraminifera has been found in the Lower Flyschoid Formation in the western part of the Slovenian Basin. These findings provide valuable insights into the biostratigraphy and paleogeographic configuration of the region during the Early to Middle Cretaceous.
CRETACEOUS RESEARCH
(2024)
Article
Geology
Arkaprava Mukhopadhyay, Debarati Chattopadhyay, Arghya Poddar, Ranita Saha, Sachin Patil, Tushar Sonkar, Sujoy Das, Rudranil Basak, Shubhabrata Paul, Arindam Roy
Summary: Predator-prey interaction exerts significant selection pressure on the evolutionary pathways of both parties. This research presents a new dataset of gastropod drilling predation on molluscan prey from the Upper Cretaceous, highlighting the influence of drilling predation during this period. The study utilizes a hybrid method of surface sampling without physically breaking the host rock. Findings suggest that drilling predation was an established form of predation during the Late Cretaceous, yet remains understudied.
CRETACEOUS RESEARCH
(2024)
Article
Geology
Dany Azar, Andre Nel
Summary: Lebanoaktassia curiosa is a new genus and species of strange dragonfly, representing the first Gondwanan species of the family Aktassiidae. It was found in Hjoula, Lebanon, along with two endemic dragonfly families, suggesting a possible connection to an island insular system in the Early Cretaceous.
CRETACEOUS RESEARCH
(2024)
Article
Geology
Pablo M. Villegas, A. Martin Umazano, Marcelo Krause, Mariana Brea
Summary: Conifer fossil woods from the Campanian Puntudo Chico Formation were studied, confirming the presence of Brachyoxylon currumillii and the introduction of Cupressinoxylon sp. cf. C. artabeae in the formation. The new specimens of Podocarpoxylon mazzonii suggest that this taxon is common in the Cretaceous to Eocene floristic assemblages. The growth-ring analysis of these fossil trees indicates their development under temperate and humid conditions, with slight sensitivity from year to year and a terminal event representing a cessation or retardation of cambial activity. Other paleoclimatic proxies suggest a temperate-warm and humid depositional environment with some semi-arid events in the Puntudo Chico Formation.
CRETACEOUS RESEARCH
(2024)
