Article
Chemistry, Multidisciplinary
Tian Dong, Lei Kang, Yifan Zhang, Yuan Gao
Summary: The evaluation of pore characteristics in lacustrine shales is important for shale oil and gas exploration. However, there have been limited reports on the quantitative evaluation of lacustrine pores due to complex depositional environments. In this study, experiments were conducted on lacustrine shale core samples to quantitatively characterize the pores. The results provide a reference for shale oil evaluation and complement studies on lacustrine pore characteristics.
APPLIED SCIENCES-BASEL
(2023)
Article
Energy & Fuels
Wei Liu, Mu Liu, Tao Yang, Xin Liu, Theodore R. Them, Kun Wang, Congsheng Bian, Qi'an Meng, Yongxin Li, Xu Zeng, Wenzhi Zhao
Summary: This study investigates the organic matter (OM) enrichment in the Upper Cretaceous Nenjiang lacustrine shale in NE China. It identifies two periods of enhanced OM accumulation controlled by distinct mechanisms and highlights the sensitivity of terrestrial environments to climate perturbations associated with oceanic anoxic events (OAEs).
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2022)
Article
Energy & Fuels
Jing-Ya Zhang, Ru-Kai Zhu, Song-Tao Wu, Xiao-Hua Jiang, Chang Liu, Yi Cai, Su-Rong Zhang, Tian-Shu Zhang
Summary: In this study, various methods were used to investigate the composition, microscopic occurrence, and mobility of shale oil in the Qingshankou Formation. The results show that shale oil primarily exists in the matrix pores of clay minerals, and the mineral composition and pore structures significantly impact the occurrence and mobility of shale oil.
Article
Geosciences, Multidisciplinary
Jinkai Wang, Jialin Fu, Jieming Wang, Kai Zhao, Jinliang Zhang, Jifu Liu
Summary: The Nenjiang Formation in the south of Songliao Basin contains many hydrocarbon bearing units, but the distribution of viable reservoir sandstones remains limited. A detailed study on sedimentary microfacies and reservoir properties identified nine lithofacies and supported the development of a sedimentary model of a river-dominated delta front setting, with the best physical properties found in the subaqueous distributary channel and mouth bar.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Geography, Physical
Xiang Li, Yongjian Huang, Zhifeng Zhang, Chengshan Wang
Summary: This study investigates the relationship between astronomically forced climate and sediment accumulation in the Songliao Basin in Northeast China. The sedimentary cycles in the basin are controlled by long-eccentricity, short-eccentricity, obliquity, and precession orbital cycles. Chemical weathering records suggest the existence of paleomonsoon variations in East Asia during the Late Cretaceous.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2022)
Article
Energy & Fuels
Penglin Zhang, David Misch, Qingtao Meng, Reinhard F. Sachsenhofer, Zhaojun Liu, Jianliang Jia, Fuhong Gao, Achim Bechtel, Fei Hu
Summary: This study investigates the organic matter-rich intervals in the Cretaceous succession of the Songliao Basin in northeastern China and examines the influences of global and regional factors on organic matter accumulation. The analysis of well logs, drill cores, and geochemical data reveals higher salinity stratification and stronger anoxia in the Southeastern Uplift compared to the Central Depression. The research also suggests that two separate depocenters might have existed during the deposition of the lowermost and most organic-rich sub-unit. The study provides direct evidence that basin segmentation strongly controlled the distribution of organic matter-rich rocks in the Qingshankou Formation.
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2022)
Article
Geology
Zhongshan Shen, Zhiqiang Yu, Hanqing Ye, Chenglong Deng, Huaiyu He
Summary: An integrated chronology for the non-marine Upper Cretaceous Nenjiang Formation in the Songliao Basin, China, was developed using high-resolution magnetostratigraphy and SIMS U-Pb zircon analyses. The study revealed the coexistence of pseudo-single-domain magnetite and single-domain greigite in the lacustrine black shales of the Nenjiang Formation. Stratigraphic correlation of borehole and outcrop sections was achieved through lithostratigraphy, biostratigraphy, and SIMS U-Pb zircon geochronology.
CRETACEOUS RESEARCH
(2022)
Article
Energy & Fuels
Lu Niu, Yuan Gao, He Huang, Xing Tian, Tian Dong, Qian Yang, Xiaomeng Cao, Chengshan Wang
Summary: This study investigated the Nenjiang Formation in the Songliao Basin of northeastern China, identifying multiple variation cycles and three potential oil shale intervals using chemostratigraphy. The research discussed paleolimnological environmental changes and confirmed that preservation conditions and productivity were key factors in organic matter enrichment during different stages of deposition.
Article
Energy & Fuels
Wentong He, Xuanlong Shan, Youhong Sun, Hansheng Cao, Shaopeng Zheng, Siyuan Su, Shijie Kang
Summary: The study found that the organic matter in the Nenjiang Formation oil shale was a mixture of aquatic organisms and higher plants. Under the influence of OAE3 and transgression events, the paleoenvironment of oil shale formation in the Nenjiang Formation was divided into four stages. The increasing sulfate content led to a decrease in total organic carbon/total sulfur ratio and a negative bias in sulfate delta S-34.
Article
Geosciences, Multidisciplinary
Xiaomeng Zhu, Jian Cao, Liuwen Xia, Lizeng Bian, Jinchao Liu, Ruijie Zhang
Summary: There is a general relationship between the formation of terrestrial hydrocarbon source rocks and marine incursions during the Mesozoic-Cenozoic in China. This study focused on the little-studied Upper Cretaceous Qingshankou Formation in the Songliao Basin, China, and found that the formation contains mudstone and shale with high organic matter content, meeting the criterion of a very good-excellent source rock. Marine incursions triggered lake anoxia and increased primary productivity, improving the quality of the source rocks.
MARINE AND PETROLEUM GEOLOGY
(2023)
Article
Plant Sciences
Christian Pott, Baoyu Jiang, Manja Hethke
Summary: The lower Campanian members 2 and 3 of the Nenjiang Formation contain a diverse array of cupressoid conifers, aquatics, and water-bound plants, indicating an affiliation to the Santonian-Campanian floras of northeast Asia. The flora thrived in and along the shores of a comparatively large lake, supporting populations of different aquatic species.
REVIEW OF PALAEOBOTANY AND PALYNOLOGY
(2021)
Article
Energy & Fuels
Mianmo Meng, Jichao Peng, Hongkui Ge, Wenming Ji, Xiaoming Li, Qianyou Wang
Summary: This study focused on the rock fabric and residual oil distribution in the Upper Cretaceous Qingshankou Formation in the Songliao Basin. Various analysis methods were employed to determine the material composition and pore characteristics. The results showed that the organic matter was predominantly type I, with clay being the main mineral component. Nano-scale inorganic pores and micro-scale organic pores were found, with small pores containing a significant amount of residual oil. This study contributes to the understanding of rock fabric and its impact on residual oil distribution in lacustrine shale.
Article
Chemistry, Multidisciplinary
Bo Liu, Yu Song, Xiang Ye, Kai Zhu, Meng Yan, Li Wan, Chuang Li, Zhonghui Li, Weichao Tian
Summary: This study investigated the algal-microbial community, paleoenvironment, and shale oil potential of lacustrine organic-rich shale in the first member of Nenjiang Formation. The results showed favorable conditions for organic matter productivity and preservation, but limited hydrocarbon generation potential due to low maturity. Comparison with the shale in the first member of Qingshankou Formation indicated higher organic matter content and oil-prone kerogen in the Nenjiang Formation, suggesting potential for shale oil but requiring further research for exploration and development.
ACS EARTH AND SPACE CHEMISTRY
(2021)
Article
Geosciences, Multidisciplinary
Youliang Feng, Caineng Zou, Jianzhong Li, Changsong Lin, Hongjun Wang, Shu Jiang, Zhi Yang, Shun Zhang, Xiuli Fu
Summary: Research on sediment gravity-flow systems in the Songliao Basin is valuable for understanding sedimentary processes, patterns, and predicting the presence of good sandstone reservoirs. The study identified deep lake channel-levee-lobe and slope fan deposits within six depositional sequences spanning from the Turonian to early Coniacian upper part of the fourth member of the Quantou Formation to the early Campanian second member of the Nenjiang Formation.
MARINE AND PETROLEUM GEOLOGY
(2021)
Article
Energy & Fuels
HE Wenyuan, MENG Qi'an, LIN Tiefeng, WANG Rui, LIU Xin, LI Xin, YANG Fan, SUN Guoxin
Summary: The evolution mechanism of in-situ permeability in low-maturity shale from the Cretaceous Nenjiang Formation in the northern Songliao Basin was studied under the effect of temperature. The in-situ permeability showed a peak-valley-peak tendency with increasing temperature. The permeability was found to decrease with increasing pore pressure at the same temperature. The evolution of in-situ permeability can be divided into five stages, with organic matter conversion and pore-fracture structure being the key factors.
PETROLEUM EXPLORATION AND DEVELOPMENT
(2022)
Article
Geosciences, Multidisciplinary
Weijiao Ma, Jinbu Li, Min Wang
Summary: The petroleum resource assessment obtained from laboratory tests on old core samples tends to underestimate the in situ resources. This study investigates the hydrocarbon loss and restoration by comparing preserved and exposed core samples. It is found that previous studies have severely underestimated the in situ hydrocarbon potential due to factors such as sample crushing and crucible waiting. A new restoration model is proposed to compensate for these losses.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Geosciences, Multidisciplinary
Shaoyun Chen, Yongqiang Yang, Longwei Qiu, Xiaojuan Wang, Erejep Habilaxim
Summary: Quartz cement is an important authigenic mineral in the tight sandstones of the Shaximiao Formation in the Sichuan Basin. This study analyzed the silicon sources of the quartz cement using mineralogical, fluid inclusion, and geochemical data. The results showed that smectite alteration and dissolution of aluminosilicate minerals were the primary sources of silicon for quartz cementation. Contributions from volcanic material hydrolysis and pressure solution were relatively minor. The presence of chlorite films inhibited the development of quartz overgrowths and had minimal impact on reservoir quality.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Geosciences, Multidisciplinary
Xing Jian, Ping Guan, Ling Fu, Wei Zhang, Xiaotian Shen, Hanjing Fu, Ling Wang
Summary: This study presents a synthesis of new detrital zircon dating results and published data from the Cenozoic Qaidam basin, revealing the spatiotemporal variation of detrital zircon age populations and supporting models of synchronous deformation in northern Tibet. The study emphasizes the importance of considering textural and sedimentological parameters in zircon provenance interpretations, as well as the need for integrated provenance analysis involving other detritus components.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Geosciences, Multidisciplinary
A. Peketi, G. Sriram, A. Mazumdar, P. Dewangan, A. Zatale, V. Rajurkar, Gayatri Shirodkar, V. Mahale, V. Yatheesh
Summary: This study investigates 13 submarine seamounts in the southern Andaman volcanic arc and observes evidence of hydrothermal activity in one of the seamounts. The evidence includes plumes rich in dissolved gases, live chemosymbiotic organisms, and the deposition of neoforming minerals. These observations suggest the development of a new hydrothermal field in the least explored Andaman Sea.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Geosciences, Multidisciplinary
Yanxian Zhu, Zhiliang He, Xiaowen Guo, Long Li, Sheng He, Jian Gao, Shuangjian Li, Huili Li
Summary: This study investigates the fluid evolution history of the hydrothermal dolomite reservoir in the Middle Permian Maokou Formation in the Sichuan Basin. The results reveal the diagenetic sequences, mineral origins, salinity history, and pressure evolution using various analytical techniques. The findings provide important insights into the gas charge, escape, and preservation conditions of the reservoir.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Geosciences, Multidisciplinary
Rafaella de Carvalho Antunes, Julia Campos Guerrero, Ricardo Jorge Jahnert
Summary: This study presents a detailed sedimentary model and identifies various sedimentary facies associations in the coquina deposits of the Itapema Formation in the offshore pre-salt Buzios Field of the Santos Basin. These facies associations were primarily influenced by waves and currents and reflect a complex depositional system.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Geosciences, Multidisciplinary
Kang Meng, Tongwei Zhang, Deyong Shao, Xiuyan Liu, Hui Song, Heng Peng
Summary: In this study, an integrated method of measuring optical reflectance and Raman spectroscopy is proposed to accurately determine the thermal maturity of Lower Cambrian shales in South China. The results show that this method is reliable and effective, and it has important implications for analyzing overmature shale.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Geosciences, Multidisciplinary
Mohamed A. K. El-Ghali, Olga Shelukhina, Iftikhar Ahmed Abbasi, Mohamed S. H. Moustafa, Osman Salad Hersi, Numair A. Siddiqui, Khalid Al-Ramadan, Abdullah Alqubalee, Abdulwahab Muhammad Bello, Abduljamiu O. Amao
Summary: This study employs an integrated depositional and sequence stratigraphic approach to assess the control of diagenesis on reservoir porosity of a hybrid-energy delta system. The study focuses on the Barik Formation in the Haushi-Huqf region of Central Oman, which represents a highstand system tract of a hybrid-energy delta. The assessments reveal that the reservoir porosity is controlled by various degrees of diagenetic processes, including mechanically infiltrated clays and kaolinitization of silicate grains.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Geosciences, Multidisciplinary
Xiaocan Yu, Chunlian Wang, Hua Huang, Kai Yan
Summary: Oilfield brines are a significant alternative lithium resource. This study investigates the metallogenic characteristics and enrichment process of oilfield brines from the Jianghan Basin, central China using chemical and multi-isotope data. The results suggest that lithium enrichment in these brines is the result of interaction with clastic host rocks and dilution by meteoric water.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Geosciences, Multidisciplinary
Jianghao Qiao, Xiwu Luan, Thanuja D. Raveendrasinghe, Yintao Lu, Guozhang Fan, Xinyuan Wei, Long Jin, Jian Yin, Haozhe Ma, Lushan Jiang
Summary: This study investigates the Tanintharyi passive continental margin in the Andaman Sea and reveals the potential of the Oligocene/Early Miocene carbonate platform in the region as a significant hydrocarbon reservoir. It also examines the influence of changes in sedimentary facies and the tectonic setting of the Andaman Sea on the evolution of pockmarks.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Geosciences, Multidisciplinary
Anastasios Nikitas, Georgios Makrodimitras, Maria V. Triantaphyllou, Nikolaos Pasadakis, Kimon Christanis, Stavros Kalaitzidis, Grigoris Rousakis, Ioannis Panagiotopoulos, Alexandra Gogou, Alexandros Papadopoulos, Efthimios Tartaras, Aristofanis Stefatos
Summary: Due to the lack of deep wells in the broader region, studying mud volcanic deposits can improve the geological understanding of the Mediterranean Ridge. In this study, biostratigraphic and geochemical analyses were performed on mud breccia deposits from five Mud Volcanoes in the central MR. The results indicate the origin of these deposits and provide insights into the source rock potential. Seismic data is also used to determine the distribution of major lithostratigraphic formations.
MARINE AND PETROLEUM GEOLOGY
(2024)