Results 201 to 210 of about 15,513 (269)

A. -Microfaciès / Microfacies

Géologie Méditerranéenne, 1979
On décrit les sédiments de la Mer Pélagienne en établissant les pourcentages des différents constituants, en particulier bioclastiques. Les sédiments sont essentiellement carbonatés avec peu d'éléments terrigènes, sauf près des côtes où il y a beaucoup de quartz et sous les eaux profondes (talus et fosses) où les argiles sont plus abondantes ...
Burollet, Pierre-Félix, Cassoudebat, M., Duval, Fabienne, Templeton, R.S.M., Desprat, R.   +4 more
openaire   +2 more sources

Petrographic microfacies classification with deep convolutional neural networks

Computational Geosciences, 2020
Petrographic analysis is based on the microscopic description and classification of rocks and is a crucial technique for sedimentary and diagenetic studies.
R. P. D. Lima, D. Duarte, Charles D. Nicholson, R. Slatt, K. Marfurt   +4 more
semanticscholar   +1 more source

Microbial mat-induced microfacies in clastic deposits – An overview

South African Journal of Geology
This contribution reviews microbial microfacies recognisable in vertical sections through modern or fossil mat-overgrown sediment. Microfacies are products of endobenthic or epibenthic microbial mats interacting with sediment dynamics.
N. Noffke, C. Buntin, N. Drabon, K. Hickman‐Lewis, A. Manning-Berg, F. Westall   +5 more
semanticscholar   +1 more source

Microfacies and stable isotope features of the Lower–Middle Jurassic carbonate rocks of Western Saharan Atlas (Aïn Ouarka area, Algeria)

Geological Journal, 2021
The Jurassic Lower Carbonate Group in the Aïn Ouarka area of Western Saharan Atlas, Algeria, is represented by six formations, from base to top: Hettangian Chemarikh Dolostone, Early Sinemurian–Pliensbachian Aïn Ouarka Limestone, Toarcian Aïn Rhezala ...
Chikh Younes Mahboubi, Abdelkader Ouali Mehadji, N. Chevalier   +2 more
semanticscholar   +1 more source

Microfacies and diagenetic overprints in the limestones of Middle Jurassic Fort Member (Jaisalmer Formation), Western Rajasthan, India: Implications for the depositional environment, cyclicity, and reservoir quality

Geological Journal, 2020
The present study investigates the microfacies and the effects of diagenetic processes on the reservoir quality of limestones of the Fort Member, Jaisalmer Formation, Western Rajasthan.
Faiz Ahmad, M. Quasim, A. Ahmad
semanticscholar   +1 more source

AUTOMATING MICROFACIES ANALYSIS OF PETROGRAPHIC IMAGES

SPWLA 61st Annual Online Symposium Transactions, 2020
Disclosed herein are methods and systems for analysis of a petrographic image of a sample of a subterranean formation, the method comprising performing an unsupervised machine-learning algorithm on the petrographic image, and determining a microfacies or a microfacies characteristic of the sample based on a segmented image provided by the unsupervised ...
Sonali Pattnaik, Songhua Chen, Wei Shao, Adly Helba   +3 more
openaire   +1 more source

Microfacies and reservoir quality of the Middle Cretaceous Rumaila Formation in the AD oilfield, central Mesopotamian Basin, southern Iraq

, 2021
The Middle Cretaceous Rumaila Formation comprises a thick carbonate succession and forms an important reservoir unit in the Central Mesopotamian Basin.
Hangyu Liu, K. Shi, Bo Liu, Xinmin Song, R. Guo, Genjiu Wang, Huan Wang   +6 more
semanticscholar   +1 more source

Sedimentary characteristics and reservoir origin of the mound and shoal microfacies of the Ma51+2 submember of the Majiagou Formation in the Jingbian area

Journal of Petroleum Science and Engineering, 2021
: The carbonate rocks of the Majiagou Formation contain extensive oil and gas resources. To determine the rock type, sedimentary characteristics and sedimentary environment of the Ma51+2 submember, its sedimentary microfacies are distinguished via core ...
Xin Xu, Qianghan Feng, Qiansheng Wei, Sheng-Fen Yang, Jiachao Zhang, Qian Pang, Yushuang Zhu   +6 more
semanticscholar   +1 more source

Biostratigraphy, Microfacies and Depositional Environment of the Sarvak Formation at the Pyun Anticline (Zagros Basin, Southwest of Iran)

Acta Geologica Sinica - English Edition, 2021
The Sarvak Formation is a carbonate sequence of Late Albian–Early Turonian age in Zagros Basin in Iran. In this investigation, the Sarvak Formation at the Pyun Anticline section (Izeh Zone) has been studied.
Mahtab Dousti Mohajer, M. Afghah, M. Dehghanian, Seyed Jamal SHEIKH ZAKARIAII   +3 more
semanticscholar   +1 more source

Microfacies of Cambrian Limestones in Jordan

Facies, 1992
The limestones of the Wadi Nasb Formation of the uppermost Lower Cambrian of Jordan are under- and overlain by massive sandstones of a near-shore facies. Facies analysis is based on samples from an outcrop at the northeastern shore of the Dead Sea and two oil test wells in the Wadi Sirhan Depression in eastern Jordan.
Rafie Shinaq, Klaus Bandel
openaire   +1 more source