Article
Geosciences, Multidisciplinary
Amr S. Deaf, Awad A. Omran, Eman S. Zain El-Arab, Abu Bakr F. Maky
Summary: This study analyzed the upper Khatatba Formation in a well in northern Egypt and found potential shale gas resources in the region. However, the present high thermal maturation has resulted in lower quality of active organic matter.
MARINE AND PETROLEUM GEOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Yunyan Ni, Dazhong Dong, Limiao Yao, Jianping Chen, Xing Liang, Fei Liu, Jian Li, Jinhao Guo, Jinliang Gao
Summary: This study analyzed gases from shale gas fields in the southern Sichuan Basin to investigate their geochemical characteristics and origins. The gases belonged to shale gas from the Upper Ordovician-Lower Silurian shale and were dominated by methane. The isotopic compositions of carbon indicated high thermal maturity and contributions from organic matter. The study found a complete carbon isotopic reversal trend and highlighted the importance of understanding the geochemical characteristics of shale gases for future exploration.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Geosciences, Multidisciplinary
Yifan Gu, Guangyin Cai, Dongfeng Hu, Zhihong Wei, Ruobing Liu, Jing Han, Zhiwei Fan, Jingyu Hao, Yuqiang Jiang
Summary: This study comprehensively characterizes the Upper Permian Linghao Formation shale in the Nanpanjiang Basin, revealing its high maturity and reservoir characteristics, indicating its significant potential for shale gas exploration.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Geosciences, Multidisciplinary
Mohammed Hail Hakimi, Mikhail A. Varfolomeev, Ali Y. Kahal, Abbas F. Gharib, Fahad Alshehri, Afikah Rahim, Hussain J. Al Faifi, Ameen A. Al-Muntaser, Saleh Qaysi, Karem Abdelmohsen
Summary: This study provides a detailed geochemical characterization of the Madbi organic-rich shale intervals in the Sunah oilfield, and reveals both conventional and unconventional oil resource potential. The Madbi source rock has high organic content and reaches a low mature stage, making it a potential unconventional oil resource candidate. The study also identifies the conventional petroleum system of the Madbi Formation and finds it to have relatively high maturity and oil generation potential.
JOURNAL OF ASIAN EARTH SCIENCES
(2022)
Article
Geosciences, Multidisciplinary
Guoqiang Luan, Karem Azmy, Fabrizio Berra, Giovanna Della Porta, Mattia Nembrini
Summary: The Dorgali Formation in eastern Sardinia consists of dolomitized oolitic grainstone and exhibits a complex diagenetic history. Petrographic examinations revealed three main phases of dolomites with different crystal sizes, indicating the origin of dolomites in different burial conditions and temperatures. The geochemical characteristics of dolomitizing fluids suggest a seawater origin for the parent fluids.
MARINE AND PETROLEUM GEOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Qifeng Wang, Haifa Tang, Zhi Guo, Gang Cheng, Zhikai Lv, Qunming Liu
Summary: This study analyzes the geological and geochemical characteristics of Lower Jurassic shale in the Tarim Basin through experiments, discovering high total organic carbon (TOC) content and regional differences. The main kerogen types in the shale were identified as type III and type II2, with significant variations in thermal evolution maturity. The shale also exhibited a high content of brittle minerals, indicating good fracturing properties. Based on these findings, the Lower Jurassic shale gas in the Tarim Basin shows promising exploration prospects, particularly in specific areas within the Kuqa Depression and the East Tarim Basin.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Geosciences, Multidisciplinary
Youli Wan, Jiashan Lin, Zhan Zhao, Zhonglin Wang
Summary: The origin and evolution of the dolostone reservoirs in the Qiangtang Mesozoic sedimentary basin were studied through petrographic analysis, fluid inclusion thermometry dating, and C-O and Sr isotopic dating. Different types of dolomite matrix and cement were identified, and their formation environments and processes were determined.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Geosciences, Multidisciplinary
Tao Deng, Yong Li, Xiumian Hu
Summary: Abundant Carnian bedded and nodular cherts in the Sichuan foreland basin, South China, provide valuable information about the Carnian Pluvial Episode and the early evolution of the basin. Through a multitracer study, it has been determined that these cherts were formed through biogenic extraction and precipitation of silica from upwelling seawater, rather than hydrothermal sources.
JOURNAL OF ASIAN EARTH SCIENCES
(2022)
Article
Geosciences, Multidisciplinary
Qianwen Li, Zhongbao Liu, Feiran Chen, Guangxiang Liu, Dianwei Zhang, Peng Li, Pengwei Wang
Summary: Comprehensive analysis of the Jurassic Da'anzhai Member shale strata in the northeastern Sichuan Basin reveals the organic geochemical characteristics, organic matter provenance, and sedimentary environment. The J(1)da(2) section is identified as the most favorable for hydrocarbon enrichment. The organic matters in the J(1)da shale strata are derived from both terrestrial higher plants and lower aquatic organisms, suggesting a freshwater lacustrine environment overall.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Piyush Ranjan Das, Vinod Atmaram Mendhe, Alka Damodhar Kamble, Pushpa Sharma, Priyanka Shukla, Atul Kumar Varma
Summary: The geochemical and petrographic characteristics of the Barakar coal seams in the Jharia Basin were evaluated to determine their coalbed methane (CBM) reservoir potential. The analysis revealed high gas content, favorable cleat intensities, excellent diffusion characteristics, and moderate saturation levels, indicating significant gas storage capacity in these coal seams. The estimated recoverable resource using Mavor Pratt methods is 8.78 BCM, suggesting a realistic resource value for CBM development in the studied area.
Article
Geosciences, Multidisciplinary
Zhen Qiu, Bei Liu, Bin Lu, Zhensheng Shi, Zhiyang Li
Summary: This study focused on the depositional and diagenetic processes controlling the fabric and petrophysical properties of black shales through the analysis of the Wufeng-Longmaxi Shale. It was found that the studied shale is mainly composed of over-mature black shales with organic matter dominated by pyrobitumen and graptolite, while minerals consist of quartz, carbonates, and clay minerals. Vertical variations in lithofacies and mineral content exhibited three cycles, likely corresponding to three transgressive-regressive cycles.
MARINE AND PETROLEUM GEOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Di Ma, Zhijie Zhang, Chuanmin Zhou, Dawei Cheng, Haitao Hong, Hao Meng, Xinghe Yu, Zixiao Peng
Summary: The paleoenvironment of the Middle Jurassic Shaximiao Formation in the Sichuan Basin was reconstructed by analyzing the multicolored mudstones using sedimentological and elemental geochemical methods. The results indicate that the sediments were primarily derived from igneous rocks rather than recycled sediments. The paleoclimate evolved from semi-arid to semi-humid conditions, coinciding with records in other basins of the Northern Hemisphere.
Article
Geosciences, Multidisciplinary
Mohammed H. Aljahdali, Amr S. Deaf, Thomas Gentzis, Rashad A. Bantan, Ramadan H. Abu-Zied, Humberto Carvajal-Ortiz, Miran M. Khalaf
Summary: Integrated organic petrographic and geochemical analyses of organic-rich marine carbonate and mixed clastic-carbonate rocks from the Shushan Basin, Egypt revealed their hydrocarbon potential. The depositional settings, paleoclimate, and genetic stratigraphic sequences were identified. The source rocks in the basin were deposited due to the interplay between sea level changes, tectonic activity, and climate. The Middle-Late Jurassic and Early Cretaceous deposits showed varying levels of organic richness and hydrocarbon potential.
FRONTIERS IN EARTH SCIENCE
(2023)
Article
Geology
Pengjie Ma, Chunmei Dong, Chengyan Lin
Summary: The study identified varying abundance of carbonate-bearing fluorapatite (CFA) nodules in Eocene lacustrine shale in the Bohai Bay Basin, with CaO, P2O5, and F being dominant components. The CFA nodules were classified into three types based on their REY patterns, providing insights into formation mechanisms and paleoenvironmental proxies. Adsorption of P, TE, and REY by Fe-(oxyhydr)oxide and organic matter played a significant role in CFA formation through dissolution-recapture-reprecipitation process in the ambient pore water of the Fe reduction zone during early diagenesis.
SEDIMENTARY GEOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Fahad Ali, Shiqi Zhang, Muhammad Hanif, Mohibullah Mohibullah, Yaxuan Zhang, Muhammad Usman, Sheng Wang, Xueliang Liu, Pengjie Ma, Dongmou Huang
Summary: This study provides insights into the depositional setting and geological history of black shales in the Indus Basin. Analysis of trace elements and isotopic ratios indicates the presence of oxygen-depleted anoxic conditions in high-potential source rock and oxic to sub-oxic settings in non-potential source rock. Palynofacies analysis confirms a mixed terrestrial and marine organic influx. The depositional setting of black shale is found to occur in the anoxic proximal to distal shelf.
FRONTIERS OF EARTH SCIENCE
(2022)
Article
Geosciences, Multidisciplinary
Mohammed Hail Hakimi, Abdulwahab S. Alaug, Abdulghani F. Ahmed, Madyan M. A. Yahya
JOURNAL OF AFRICAN EARTH SCIENCES
(2019)
Article
Geosciences, Multidisciplinary
S. M. Talha Qadri, Md Aminul Islam, Mohamed Ragab Shalaby
NATURAL RESOURCES RESEARCH
(2019)
Article
Energy & Fuels
Mohamed R. Shalaby, Nurhazwana Jumat, Daphne Lai, Owais Malik
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2019)
Article
Geosciences, Multidisciplinary
Mohammed Hail Hakimi, Abdulwahab S. Alaug, Aref A. Lashin, Ibrahim M. J. Mohialdeen, Madyan M. A. Yahya, Mostafa M. Kinawy
MARINE AND PETROLEUM GEOLOGY
(2019)
Article
Energy & Fuels
Mohamed R. Shalaby, Liyana Nadiah Osli, Stavros Kalaitzidis, Md Aminul Islam
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2019)
Article
Energy & Fuels
Mohamed Ragab Shalaby
Summary: The reservoir characteristics and hydraulic flow unit properties of the Khatatba Formation in Qasr field, Western Desert, Egypt were investigated using various methods to analyze and characterize the sandstone. Samples from three different wells showed that the sandstone can be classified into three rock types, where Rock type I has the best storage capacity and permeability, while Rock type III is the poorest quality reservoir.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Energy & Fuels
Liyana Nadiah Osli, Mohamed R. Shalaby, Md Aminul Islam, Stavros Kalaitzidis, Maria Elli Damoulianou, Khairunnisa Nazirah Pg Dr Karim, Basilios Tsikouras, Nikos Pasadakis
Summary: The characteristics of the source rocks in the early to late Miocene Belait Formation of Brunei Darussalam were evaluated utilizing Rock-Eval, biomarker analyses, and organic petrography. The results showed that coal and some carbonaceous samples from the formation have good generating potential, while non-coal samples generally have lower potential. The facies analysis suggested a mangrove setting in a lower delta plain for the deposition of coals, with mostly herbaceous and arboreal plants growing, under predominantly oxic and brackish conditions.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Energy & Fuels
Mohamed Ragab Shalaby, Nicolaj Mahlstedt, Liyana Nadiah Osli, Md Aminul Islam
Summary: The study investigated the petroleum generation kinetics of the Early to Late Miocene Belait Formation in Brunei-Muara district using the PhaseKinetic approach. The source rock characteristics indicate mainly type III-II and type III kerogens, with petroleum grading from paraffinic-naphthenic-aromatic high wax to gas and condensate. Pyrolysis data suggest that hydrocarbon generation occurs at temperatures ranging from 105-120 degrees C for 10% transformation ratio, with the end of generation expected at temperatures above 170 degrees C.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Multidisciplinary Sciences
Surya Tejasvi Thota, Mohamed Ragab Shalaby
Summary: The Carboniferous rock samples of the Limburg Group formations were studied to investigate their source rock characteristics and hydrocarbon generative potential. The study found that these formations have excellent potential as a source of hydrocarbons, with total organic carbon ranging from 0.31% to 83.56%. The analysis also revealed that the kerogen in these formations is type II-III and type III, which generate gas prominently.
Article
Energy & Fuels
Kamalia Norjannah Kamalrulzaman, Mohamed Ragab Shalaby, Md Aminul Islam
Summary: The aim of this study is to characterize the source rocks of the Latrobe Group's formations in the Gippsland Basin. The results show that the source rocks have good organic abundance and hydrocarbon generative potential. The study also reveals the depositional environment and hydrocarbon generation history of the source rocks. This study is important for understanding the burial history, hydrocarbon generation, and development of hydrocarbon fields in the Gippsland Basin.
GEOENERGY SCIENCE AND ENGINEERING
(2023)
Article
Energy & Fuels
Mohamed Ragab Shalaby, Syamimi Hana Binti Sapri, Md Aminul Islam
JOURNAL OF PETROLEUM EXPLORATION AND PRODUCTION TECHNOLOGY
(2020)
Article
Energy & Fuels
Mohamed Ragab Shalaby, Muhammad Izzat Izzuddin bin Haji Irwan, Liyana Nadiah Osli, Md Aminul Islam
JOURNAL OF PETROLEUM EXPLORATION AND PRODUCTION TECHNOLOGY
(2020)
Article
Energy & Fuels
Mohamed Ragab Shalaby, Owais Ahmed Malik, Daphne Lai, Nurhazwana Jumat, Md Aminul Islam
JOURNAL OF PETROLEUM EXPLORATION AND PRODUCTION TECHNOLOGY
(2020)
Article
Energy & Fuels
S. M. Talha Qadri, Md Aminul Islam, M. R. Shalaby
GEOMECHANICS AND GEOPHYSICS FOR GEO-ENERGY AND GEO-RESOURCES
(2019)
Article
Energy & Fuels
Liyana Nadiah Osli, Mohamed R. Shalaby, Md Aminul Islam
JOURNAL OF PETROLEUM EXPLORATION AND PRODUCTION TECHNOLOGY
(2019)