Article
Energy & Fuels
Li Jian, Tian Jixian, Liu Chenglin, Feng Dehao, Zeng Xu, Zhang Mai, Guo Zeqing, Kong Hua, Rizwan Sarwar Awan, Li Zhijie, Yang Sai
Summary: This study analyzed the geochemical characteristics and sources of natural gas in the western Qaidam Basin using isotopes and gas composition. The natural gas in this region consists mainly of hydrocarbon gases, with high dryness coefficient, heavy carbon isotopes, and high thermal maturity. The main gas source rocks in the western Qaidam Basin are identified as lower Ganchaigou (E-3), upper Ganchaigou (N-1), and lower Youshashan formations (N-2(1)).
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Geosciences, Multidisciplinary
Mingzhen Zhang, Shuang Dai, Songqi Pan, Zhenhua Jing, Zhixiong Wu, Yongxin Chen, Baoxia Du, Jing Zhang, Guolong Liu, Dunzhu Jiaoba, Peihong Jin, Liming Ji
Summary: In this study, abundant Botryococcus fossils were found for the first time in the Yingxiongling and Zhahaquan hydrocarbon-rich sags of the western Qaidam Basin, accounting for an average of 43.5% of the total organic debris. These Botryococcus-dominated shales have a perfect laminated texture and are composed of detrital, carbonate, and clay laminae. They have a high oil-prone hydrocarbon generation potential and are potentially important oil sources.
MARINE AND PETROLEUM GEOLOGY
(2023)
Article
Energy & Fuels
Liu Zhanguo, Zhang Yongshu, Song Guangyong, Li Senming, Long Guohui, Zhao Jiang, Zhu Chao, Wang Yanqing, Gong Qingshun, Xia Zhiyuan
Summary: This study analyzed the lithofacies and controlling mechanisms of reservoir formation in the mixed pre-salt carbonate rocks in the upper member of Eocene Xiaganchaigou Formation (E-3(2)) of Yingxi area in the Qaidam Basin. The research led to the composite lithofacies-tectonic formation model of pre-salt reservoir, providing new insights into tight-shale oil accumulation theory and aiding in efficient exploration and development of petroleum in the studied area.
PETROLEUM EXPLORATION AND DEVELOPMENT
(2021)
Article
Geosciences, Multidisciplinary
Ling Sun, Junliang Ji, Bingshuai Li, Xingbo Li, Wujun Wu, Kexin Zhang
Summary: This study investigates the tectonic rotation and stress evolution history in the Qaidam Basin using sediment samples from the Dahonggou section. The results show that the basin experienced clockwise and counterclockwise rotations, as well as different stress directions at different time intervals. These findings contribute to a better understanding of crustal deformation in the Qaidam Basin and the Tibetan Plateau.
SCIENCE CHINA-EARTH SCIENCES
(2022)
Article
Geosciences, Multidisciplinary
Qiqi Li, Shang Xu, Fang Hao, Zhiguo Shu, Fengling Chen, Yongchao Lu, Shiqiang Wu, Liang Zhang
Summary: This study discovered shale oil resources in the Lower Member of Paleogene Xingouzui Formation (LXF) of the Jianghan Basin and investigated the mechanisms of organic matter enrichment. Different sedimentary environments were found to control the source and enrichment of organic matter.
MARINE AND PETROLEUM GEOLOGY
(2021)
Article
Geography, Physical
Yu Liang, Bin Zhang, Yongshu Zhang, Yancheng Zhang, Jun Wang, Zhonghui Liu
Summary: Research indicates that the megalake in the Qaidam Basin on the northeast Tibetan Plateau experienced significant water level fluctuations during the mid- and late Miocene, controlled by global climatic conditions. Overall, the lake shrank under relatively cool conditions and expanded under relatively warm conditions, gradually dwindling over time.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2021)
Article
Geosciences, Multidisciplinary
Sheng Jun, Liu Jincheng, Li Yunlong, Zou Haiyan, Long Anlin, Wang Lin, Li Jiyong, Qi Qingshan, Yang Xiaojing, Li Yanan
Summary: Through the study of fine-grained mixed sedimentary rocks in the Qaidam Basin, it is found that they have the potential for self-generation and self-storage, and have industrial application value as an unconventional reservoir.
ACTA GEOLOGICA SINICA-ENGLISH EDITION
(2022)
Article
Geosciences, Multidisciplinary
Tao Hu, Xiongqi Pang, Tianwu Xu, Changrong Li, Shu Jiang, Qifeng Wang, Yuanyuan Chen, Hongan Zhang, Chuang Huang, Shuangyi Gong, Zhongchen Gao
Summary: Based on 40 years of geochemical data collection, this study reveals that laminated shales with TOC contents greater than 1 wt.% are the key source rocks in the heterogeneous Paleogene shales in the Dongpu depression.
Article
Geology
Xiang Li, Fei Li, Jiangong Wang, Bo Wang, Zhaobing Wang, Xiujian Sun, Lei Qian, Chuheng Yi
Summary: Studying lacustrine microbialites in the Qaidam Basin can provide insights into the occurrence and mineralization processes of microbial communities in harsh terrestrial environments. The research indicates that these microbialites developed in shallow water settings and exhibited layered and clotted structures formed during early mineralization processes.
SEDIMENTARY GEOLOGY
(2022)
Article
Energy & Fuels
Xin He, Jungang Lu, Wenyan Li, Songbai Zhu, Liping Zhao, Zhiwei Ma, Jiang Zhu, Meimei Han, Shijia Chen
Summary: This paper studies the geochemical characteristics of source rocks and petroleum in different salinity environments in the Qaidam Basin, China. The results show that the salinity differences between sedimentary water sources result in different geochemical characteristics of source rocks and their products. Based on these characteristics, the oils can be categorized into two types: salt water deposition and freshwater deposition. The geochemical differences between these sedimentary environments make it relatively easy to distinguish the source rocks for each type.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Geochemistry & Geophysics
Lan-tian Xing, Li Xu, Ping-zhong Zhang, Jing Zhang, Peng Wang
Summary: Based on systematic analysis of samples from the western Qaidam basin, the organic geochemical characteristics of Paleogene saline lacustrine carbonate source rocks were studied. The results show that these source rocks have high total organic carbon content and hydrocarbon generation potential, indicating their high quality. The source rocks are in a state of low maturity and were deposited in an anoxic and saline environment. Aquatic algae are the main organic parent material, as indicated by biomarker compositions. The presence of Botryococcus braunii fossils was also identified. This study provides guidance for predicting the distribution of high-quality source rocks in the western Qaidam basin.
GEOCHEMISTRY INTERNATIONAL
(2022)
Article
Geochemistry & Geophysics
Yongjie Lin, Ian M. Power, Wenxi Chen
Summary: This study investigates the formation of aragonitic ooids in the west Qaidam Basin, Qinghai-Tibetan Plateau, suggesting that aragonite precipitation is mainly induced by increasing alkalinity of lake waters, rather than microbial activity.
Article
Geosciences, Multidisciplinary
Yanqing Wang, Guangyong Song, Chao Zhu, Zhanguo Liu, Senming Li, Yanxiong Wu, Zhiyuan Xia, Qi Shi, Xuebin Wei, J. Lawford Anderson, Yuruo Shi
Summary: This study investigates the developmental characteristics and controlling factors of beach-bar sandstone in saline lake basins in the Qaidam Basin, China. The research reveals the lithology and bedding structure of the sand bodies in the Neogene saline lake basins, which consist of fine-grained sandstone and siltstone. Four factors, including lake water salinity, terrigenous input, palaeogeomorphology, and monsoons, are found to control the construction and distribution of beach-bar sand bodies in the basin.
GEOLOGICAL JOURNAL
(2022)
Article
Energy & Fuels
Xiheng Liu, Jungang Lu, Weining Dan, Yulei Shi, Jing Liu, Sisi Tian, Chenguang Hu, Jiarun Li
Summary: This study investigates the geochemical characteristics and sedimentary environment of source rocks in the Pearl River Mouth Basin and the Hetao Basin. The results show that the source rocks in the Pearl River Mouth Basin have good hydrocarbon generation potential, while the source rocks in the Hetao Basin have lower maturity. Freshwater basins are less affected by paleoclimate and paleosalinity, while saline lake basins are strongly influenced by paleosalinity.
PETROLEUM SCIENCE AND TECHNOLOGY
(2023)
Article
Geosciences, Multidisciplinary
Dehao Feng, Chenglin Liu, Jixian Tian, Yu Ran, Rizwan Sarwar Awan, Xu Zeng, Jingkun Zhang, Qibiao Zang
Summary: This study utilized a comprehensive dataset and basin modeling approach to investigate the origin and accumulation process of natural gas in the northwestern Qaidam Basin. The findings include revised diagrams for source material classification, the discovery of secondary cracking gas of oil, and the establishment of gas accumulation models for different types of gases.
NATURAL RESOURCES RESEARCH
(2023)