Article
Geosciences, Multidisciplinary
Irfan Sh. Asaad, Sardar M. Balaky, Goran F. Hasan, Mahdi Kh. Aswad
Summary: A detailed sedimentological investigation of the Baluti Formation in northeastern Kurdistan, Iraq, revealed that the formation is mainly composed of limestone and marl, with carbonate mainly consisting of carbonate mud. The rocks were subjected to various diagenetic processes, and the environment of deposition was interpreted as a shallow marine subtidal lagoon.
GEOLOGICAL JOURNAL
(2021)
Article
Multidisciplinary Sciences
Israa A. Al-Iessa, Wang Zhi Zhang
Summary: Microfacies and environmental analyses were conducted on the Yamama Formation in the Tithonian-Hautervian sequence in the Ratawi oil field of southern Iraq. Petrographic, facies, and depositional models were studied, identifying multiple facies and diagenesis processes. Noncore depths were monitored by matching them with corresponding well logs to obtain electrofacies. The formation environments were divided based on facies and electrofacies characteristics, including lagoon, open marine, shoal, and slope environments.
SCIENTIFIC REPORTS
(2023)
Article
Energy & Fuels
Mehdi Sarfi, Ali Asaadi, Ali Imandoust, Amin Navidtalab
Summary: This paper presents a detailed analysis of the facies characteristics, depositional environment, and sequence stratigraphy of the Arab Formation in an oil field in the Persian Gulf. The results show a strong correlation with local and regional studies, which may be influenced by the layer-cake nature of the formation and global sea-level fluctuations.
PETROLEUM SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Jiangwei Wei, Fawang Li, Shikuo Zhang, Hanlie Cheng, Qiang Qin, David Cadasse
Summary: This study systematically investigates the sedimentary characteristics, types of sedimentary facies and microfacies, as well as the plane distribution of sedimentary facies in the Chang 2 reservoir group in Huangjialing, north-central Ordos Basin. The results show the presence of three microfacies, which have significant implications for the later exploration of oil and gas in the Ordos Basin.
JOURNAL OF CHEMISTRY
(2022)
Article
Geosciences, Multidisciplinary
Minglei Yang, Xinya Yu, Dancheng Zhu, Ke Long, Chaojin Lu, Huayao Zou
Summary: This study investigates the distribution and reservoir characteristics of microbial carbonates in the upper submember of the Middle Triassic Leikoupo Formation in the western Sichuan Basin. It identifies high-quality reservoirs in the central area (regressive microbialites) and northern area (intraclast dolograinstone). The study proposes a depositional framework for microbialites and evaluates its control on reservoir quality, which is significant for further research on microbial carbonate reservoirs.
MARINE AND PETROLEUM GEOLOGY
(2023)
Article
Energy & Fuels
Maria-Elli Damoulianou, Konstantinos Perleros, Ibrahim M. J. Mohialdeen, Polla Khanaqa, Carla Viviane Araujo, Stavros Kalaitzidis
Summary: This study focuses on the Chia Gara Formation in Northern Iraq, which is considered a major source rock for the Kirkuk oil field. The formation consists of bituminous limestones and calcareous shales deposited during the Late Jurassic - Early Cretaceous. The study reveals that the formation was deposited in a shallow marine environment, with significant terrestrial input. The results provide insights into the organic matter characteristics and maturation of this prolific Formation.
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2022)
Article
Geology
Annaka M. Clement, Lydia S. Tackett
Summary: The Gabbs Formation in west-central Nevada provides a valuable record of carbonate crisis and mass extinction events during the Late Triassic to early Jurassic period. The study reveals the gradual disappearance of carbonate facies and multiple sedimentary cycles, offering a more precise timeline of environmental upheaval during the latest Triassic period.
SEDIMENTARY GEOLOGY
(2021)
Article
Geosciences, Multidisciplinary
Kareem H. Kareem, Ihsan S. Al-Aasm, Howri Mansurbeg
Summary: The study identified multiple generations of dolomite in the Lower Cretaceous Qamchuqe Formation in the Kurditan Region of Iraq, originating from a mixture of hydrothermal and marine fluids, causing dolomitization of the host rock and precipitation of dolomite cements.
MARINE AND PETROLEUM GEOLOGY
(2021)
Article
Geography, Physical
I. Campana, A. Benito-Calvo, A. Perez-Gonzalez, A. I. Ortega, A. Alvaro-Gallo, L. Miguens-Rodriguez, J. Iglesias-Cibanal, J. M. Bermudez de Castro, E. Carbonell
Summary: This study demonstrates the usefulness of cave sediments for geomorphologic studies and reconstructing depositional environments. By conducting stratigraphic and sedimentological analysis on the cave interior sediments of Galeria Complex in Spain, the researchers were able to identify 12 layers and 9 sedimentary facies and observed distinct differences between the GIa and GIb sub-units. This study provides important insights into the geomorphological evolution of the area during the Pleistocene.
Article
Geosciences, Multidisciplinary
Aimen Amer, Pietari Skytta, Antti Ojala, Esa Heilimo
Summary: Detailed geological field measurements and petrographic and mineralogical analyses of the Horse Racing Club outcrop in Bahrain provided new insights into the composition, distribution, and depositional settings of the poorly understood Early Eocene Rus Formation. The rock-forming units were found to mainly consist of dolomite, dolomitic marl, claystone, and minor evaporites. Thirteen facies were identified and categorized into five facies associations, revealing the paleoshoreline trend and the influence of periodic storms on the flow of the Neo-Tethys Ocean through a narrow strait.
MARINE AND PETROLEUM GEOLOGY
(2023)
Article
Geosciences, Multidisciplinary
Yuan Wang, Shaoyong Wang, Haijun Yan, Yijie Zhang, Jianzhong Li, Debo Ma
Summary: The study presents a detailed analysis of the depositional sequence architecture and typical environments of the Member IV of the Dengying Formation in the Gaoshiti-Moxi area, providing insights into the factors controlling sequence development, such as high-frequency sea-level changes and paleogeomorphology. Different sedimentary environments with distinct characteristics are identified on the inner platform and platform margin during different depositional periods.
GEOLOGICAL JOURNAL
(2021)
Article
Multidisciplinary Sciences
Zardasht Ahmed Taha
Summary: In this study, the researchers identified fifteen open ostracoda species belonging to ten genera in the Kometan Formation in the Dokan area of NE-Iraq. The presence of certain ostracoda species and foraminifera species indicates that the Kometan Formation was deposited in a deep marine environment.
KUWAIT JOURNAL OF SCIENCE
(2022)
Article
Energy & Fuels
Syed Haroon Ali, Osman M. Abdullatif, Lamidi O. Babalola, Fawwaz M. Alkhaldi, Yasir Bashir, S. M. Talha Qadri, Ali Wahid
Summary: This paper presents the facies and depositional environment of the early Miocene Dam Formation in Saudi Arabia. The deposition of Dam Formation was influenced by changing relative sea levels and tectonic events. The study suggests that Dam Formation could be a good target for exploration in the Northern Arabian Gulf.
JOURNAL OF PETROLEUM EXPLORATION AND PRODUCTION TECHNOLOGY
(2021)
Article
Multidisciplinary Sciences
Ahmed M. Aqrawi, Irfan Sh. Asaad, Hasan A. Khudhur, Sardar M. Balaky
Summary: This study investigated the microfacies analysis and depositional environment of the Jeribe Formation in the northwestern part of Kurdistan region-northern Iraq. Field observations and petrographic analysis of thin sections revealed the presence of various shallow marine derivative fossils and different microfacies types. Based on environmental differentiation, two facies associations were identified: intertidal and lagoon. The Jeribe Formation was found to have been deposited in a shallow marine environment, transitioning from an intertidal setting to a semi-restricted lagoonal environment.
KUWAIT JOURNAL OF SCIENCE
(2023)
Article
Environmental Sciences
Lina Eklund, Abdulhakim M. Abdi, Aiman Shahpurwala, Pinar Dinc
Summary: The study found that conflict events and fires in the Kurdistan Region of Iraq have increased since 2014, showing a similar temporal pattern and being associated with specific land use and land cover contexts. Additionally, there is a specific relationship between fire hotspots and the distance to conflict, with areas farther away from conflict events having lower exposure risk to fires.
Article
Geosciences, Multidisciplinary
Sardar M. Balaky, Irfan Sh. Asaad, Ali Ismail Al-Juboury
ARABIAN JOURNAL OF GEOSCIENCES
(2016)
Article
Geosciences, Multidisciplinary
Irfan Sh. Asaad, Sardar M. Balaky, Goran F. Hasan, Mahdi Kh. Aswad
Summary: A detailed sedimentological investigation of the Baluti Formation in northeastern Kurdistan, Iraq, revealed that the formation is mainly composed of limestone and marl, with carbonate mainly consisting of carbonate mud. The rocks were subjected to various diagenetic processes, and the environment of deposition was interpreted as a shallow marine subtidal lagoon.
GEOLOGICAL JOURNAL
(2021)
Article
Multidisciplinary Sciences
Irfan Sh. Asaad
Summary: Lithostratigraphy and microfacies analysis of the Avanah Formation (Middle Eocene) were studied in the Gomaspan section in the Bina Bawi anticline, northeast of Erbil city, Kurdistan Region, Iraq. The formation consists of medium to thick-bedded yellow limestone, grey dolomitic limestone, and blue marly dolomitic limestone interbedded with thin beds of blue marl and dark grey shale with an interval of sandy limestone in the middle part and thin to medium bedded limestone interbedded with red mudstone. The petrographic study revealed that the matrix is mainly carbonate mud with few microspar, and the skeletal grains include various organisms. Based on field observation and petrographic analysis, three lithostratigraphic units and three main microfacies were identified.
KUWAIT JOURNAL OF SCIENCE
(2022)
Article
Geosciences, Multidisciplinary
Irfan Shaaban Asaad, Ali Ismail Al-Juboury, Dicle Bal Akkoca, Prakash Jha
Summary: The spherical rinded concretions in the carbonate rocks of the Avanah Formation in northern Iraq have been studied for the first time. The concretions are mostly spherical with brownish to dark grey isopachous rinds and a brownish-red center. Microscopic analysis shows similarities between the concretions and their host rocks in terms of microfacies and fossils contained. The concretions have undergone selective diagenesis, resulting in color changes between the center and outer rims. X-ray diffraction and scanning electron microscopy analysis reveal the presence of dolomite, calcite, quartz, illite, and haematite in the concretions and host rocks.
GEOLOGICAL JOURNAL
(2022)
Article
Geosciences, Multidisciplinary
Sardar M. Balaky, Maha M. Al-Dabagh, Irfan Sh. Asaad, Mazin Tamar-Agha, Mohammed S. Ali, Ahmed E. Radwan
Summary: This research emphasizes the significance of sedimentological and petrophysical heterogeneity in carbonate oil exploration in northwestern and northern Iraq.
MARINE AND PETROLEUM GEOLOGY
(2023)
Article
Geosciences, Multidisciplinary
Aura Samid Garcia, Lyubov Afanasievna Krasnoshchekova, Irfan Shaaban Asaad, Vladimir Borisovich Belozerov, Ali Ismail Al-Juboury
Summary: Paleozoic rocks in Western Siberia may have significant hydrocarbon resources, but effective exploration methods are unclear. This study provides new insights into reservoir formation by analyzing the Paleozoic succession of the North-Ostaninsk field. Dolomitization has affected the carbonate rocks, and four generations of dolomite have been identified. The last generation coincides with the presence of a reservoir and is derived from downward infiltration of meteoric water. This new understanding can help predict similar hydrocarbon accumulations in unexplored areas.
MARINE AND PETROLEUM GEOLOGY
(2023)