Article
Geosciences, Multidisciplinary
Bo Jiu, Wenhui Huang, Nana Mu, Ruilin Hao
Summary: Paleokarst carbonate reservoirs play a crucial role in oil and gas exploration, and the study of ultra-deep karst-hydrothermal reformed carbonate reservoirs in the Yubei area provides insights into the paleokarst periods, chemical properties of hydrothermal fluids, and the formation mechanism of these reservoirs.
MARINE AND PETROLEUM GEOLOGY
(2022)
Article
Energy & Fuels
Hua Liu, Yu-Wei Yang, Bin Cheng, Zi-Cheng Cao, Shen Wang, Zi-Yue Jiang, Fei-Fei Yuan
Summary: The Lower-Middle Ordovician reservoir bitumen in the Shunnan area of the Tarim Basin is influenced by various geological events, with hydrothermal activity and thermochemical sulfate reduction playing significant roles in its characteristics and origins. Wells with hydrothermal activity show higher RB contents and abnormal maturity due to Early Permian hydrothermal activity, while the cracking of crude oil is a key factor in the widespread distribution of RB.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Energy & Fuels
Feng Jun, Zhang Yajin, Zhang Zhenwei, Fu Xiaofei, Wang Haixue, Wang Yachun, Liu Yang, Zhang Junlong, Li Qiang, Feng Zihui
Summary: Based on seismic, drilling data and experimental analysis, the characteristics and main controlling factors of shoal dolomite gas reservoir in Gucheng area, Tarim basin were examined. It was found that the formation of the dolomite gas reservoir is mainly attributed to factors such as paleotectonic structure development, deposition of medium-high energy grain banks, atmospheric water leaching and dolomitization, fluid dissolution in fault zone, and cracking of ancient oil reservoir for natural gas source.
PETROLEUM EXPLORATION AND DEVELOPMENT
(2022)
Article
Energy & Fuels
Yang Peng, Liu Keyu, Li Zhen, Mcinnes Brent Ian Alexander, Liu Jianliang
Summary: Based on various analyses, the study systematically determines the charge and evolution history of the YJ1X ultra-deep oil reservoir in the southwestern part of the Tabei Uplift. It reveals that the reservoir oil, free oil, and inclusion oil have similar characteristics and maturities, suggesting a common marine source. The study also identifies two types of oil inclusion assemblages in the reservoir and demonstrates that the reservoir experienced one oil charge during the Early Devonian and has been well preserved since.
PETROLEUM EXPLORATION AND DEVELOPMENT
(2022)
Article
Geosciences, Multidisciplinary
Lianqi Jia, Chunfang Cai, Jingong Zhang, Lijing Liu, Qingyong Luo, Kaikai Li
Summary: The study suggests that thermochemical sulfate reduction (TSR) occurs in carbonate reservoirs of Tarim Basin, with different geological settings of TSR reactions potentially resulting in varying effects on reservoir quality.
MARINE AND PETROLEUM GEOLOGY
(2021)
Article
Geosciences, Multidisciplinary
Yong-Bin Niu, Meng-Yuan Cheng, Li-Jun Zhang, Jian-Hua Zhong, Sheng-Xin Liu, Duan Wei, Zi-Lu Xu, Pei-Jun Wang
Summary: Bioturbation plays a significant role in enhancing the reservoir capacity of tight reservoirs. This study examined the petrophysical characteristics of bioturbation and host sediments in carbonate rocks and analyzed their effects on the properties of the rocks. The results show that multiple burrows created by bioturbation formed large-scale bioturbated carbonate rocks with lateral continuity and vertical connectivity, which were further improved by diagenesis.
JOURNAL OF PALAEOGEOGRAPHY-ENGLISH
(2022)
Article
Geosciences, Multidisciplinary
Wenbiao Zhang, Zhiliang He, Taizhong Duan, Meng Li, Huawei Zhao
Summary: This study successfully quantitatively characterized and geologically modeled the fault/fracture-controlled paleokarsts through the establishment of a hierarchical structure and a hierarchical modeling method. The research was validated in the Tahe oilfield and can reflect the spatial structure of fault/fracture-controlled paleokarst carbonate reservoirs.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Geochemistry & Geophysics
Yongjin Zhu, Jianfeng Zheng, Jiankun Zhang, Xinsheng Luo, Guang Yu, Jun Li, Fangjie Hu, Guo Yang
Summary: The objective of this study is to analyze the facies, depositional environment and reservoir quality of the Early Cambrian Xiaoerbulake Formation in the Tarim Basin. The study shows that the deposits of the Xiaoerbulake Formation occurred in a ramp setting, with seven facies associations and ten facies types. High-quality reservoirs were found in the high-energy shoal environments, characterized by different pore space types. This research contributes to our understanding of the stratigraphic framework, sedimentary-facies evolution, and high-quality reservoir distribution, aiding in hydrocarbon exploration and production.
Article
Geography, Physical
Chenlin Hu, Changcheng Han, Jinghui Ma, Wenfeng Wang, Fangyu Zhao, Wenxuan Sun
Summary: This study investigated the sedimentary differentiation and anisotropy of magnetic susceptibility (AMS) of the Tarim Carbonate Platform (TCP) in order to infer the paleowind directions during each epoch of the Cambrian-Ordovician and constrain its paleogeographic location. The results showed that the prevailing wind directions of the Early, Middle, and Late Cambrian were 226 degrees +/- 42 degrees, 207 degrees +/- 43 degrees, and 193 degrees +/- 36 degrees from present north, respectively, while those of the Early, Middle, and Late Ordovician were 178 degrees +/- 39 degrees, 165 degrees +/- 43 degrees, and 155 degrees +/- 52 degrees from present north, respectively.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2023)
Article
Geosciences, Multidisciplinary
Jingyan Liu, Shiqiang Xia, Junlong Zhang, Feng He, Yuhan Cheng, Yi Zhu, Zhaoqin Chen, Huoxiang Dong
Summary: A systematic analysis was conducted on the Cambrian-Ordovician carbonate platform in the eastern Tarim Basin, revealing the development of various sub-facies and micro-facies. The depositional evolution of the platform was controlled by paleo-geomorphology and sea-level changes, resulting in the dominance of different facies during different periods. The distribution of paleo-geomorphologic units played a significant role in determining the types and distributions of carbonate platform facies. The transgression and regression of sea level also influenced the growth and distribution of reef-shoal complex and lime mud mound.
FRONTIERS OF EARTH SCIENCE
(2023)
Article
Energy & Fuels
Lanpu Chen, Heng Zhang, Zhongxian Cai, Fang Hao, Yufang Xue, Weisheng Zhao
Summary: The Middle-Lower Ordovician carbonate formation in the Tarim Basin, China, is an important hydrocarbon-bearing unit. This research provides new insights into the characteristics of karst reservoirs, the origin of diagenetic fluids, and the multistage karstification process in the region. The study shows that fracture-cave systems are the dominant secondary reservoir porosity source and that meteoric water and hydrothermal fluids play crucial roles in the formation of the fracture-cave reservoirs. Multiple dissolution stages, controlled by karst unconformities, led to the development of these reservoirs.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Environmental Sciences
Lingling Yan, Quanwen Liu, Xuefen Liu
Summary: This article analyzes the damage mechanism of the Ordovician carbonate reservoir in the Halahatang Oilfield in the Tarim Basin to provide suggestions for drilling and completion. The experimental results show the main storage space, main seepage channels, damage degree, and sensitivity of the reservoir.
FRESENIUS ENVIRONMENTAL BULLETIN
(2021)
Article
Geography, Physical
Antun Husinec, Lukas A. Harvey
Summary: This study improves understanding of the climatic and sea-level fluctuations during the Late Ordovician late Katian period by analyzing a dataset from the subsurface of North Dakota. It reveals the impact of climate and sea-level regimes on depositional dynamics and sequence architecture in a tropical epicontinental basin setting.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2021)
Article
Geosciences, Multidisciplinary
You Zhang, Qiang Li, Yongbin Niu, Bin Li, Yanqing Shi, Yumao Pang
Summary: This study investigated the key stages and models of hydrocarbon accumulation in the Gucheng area of the Tarim Basin by analyzing the Ordovician sedimentary rocks. The results showed that the area has favorable paleo-structural positions and pathway systems for hydrocarbon migration and accumulation. The multi-stage tectonic thermal events of the Caledonian and Hercynian stages played a crucial role in the adjustment and modification of deep hydrocarbon accumulation. Therefore, the western and northern parts of the Gucheng area are favorable zones for hydrocarbon exploration in the Tarim Basin.
FRONTIERS IN EARTH SCIENCE
(2023)
Article
Engineering, Marine
Zhan Zhao, Jingtao Liu, Wenlong Ding, Ruiqiang Yang, Gang Zhao
Summary: This study utilized seismic data and variance attribute to identify two types of fault damage zones and analyzed their spatial geometric characteristics. The results showed significant differences in width between the two types of damage zones, with width and throw of the zones following a power-law distribution. Factors affecting width and formation process were discussed, along with the impact of damage zones on oil and gas exploration. Seismic variance attribute was deemed a useful technique for characterizing ultra-deep strike-slip fault damage zones.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2021)