Results 51 to 60 of about 4,224,476 (188)

Paleo-environment of the first member of Niutitang Formation on the southern margin of Huangling anticline, western Hubei province: a case study of well ZD-1

Shiyou shiyan dizhi, 2022
The Lower Cambrian Niutitang Formation is one of the important targets for shale gas exploration in the western Hubei province. In view of the relatively weak research on the paleo-sedimentary environment of the 1st member of Niutitang Formation (Ꞓ1n1 ...
Lulu XU, Yaru WEN, Xianghui ZHOU, Zilong JU, Wei CHEN, Jie YANG, Zhijun REN, Jianhang WEN   +7 more
doaj   +1 more source

Petrography and Organic Geochemistry Characterizations of Lower Paleozoic Organic-Rich Shale in the Northwestern Upper Yangtze Plate: Niutitang Formation and Longmaxi Formation, Dabashan Foreland Belt

, 2018
Measurements of total organic carbon, Rock-Eval pyrolysis, X-ray diffraction, scanning electron microscope, maceral examination, gas chromatography, and gas chromatography-mass spectrometry were conducted on the organic-rich shale of Lower Paleozoic ...
Di Zhao, Delu Li, Feng Xu, Rongxi Li
core   +1 more source

Geological conditions and geochemical characteristics of favorable shale gas zones in Danzhai of the Qiannan depression

Carsologica Sinica
The Qiannan depression is located on the southwestern edge of the Yangtze block and is an important area of shale gas resources in South China. In recent years, significant progress has been made in shale gas exploration in this region.
Haojie LIU, Qingyu ZHANG, Junjie BA, Shaocong JI, Guoquan NIE, Zhen LI   +5 more
doaj   +1 more source

Full‐Scale Pore Structure Characterization of the Late Permian Dalong Shale in Western Hubei, Southern China

Geofluids, Volume 2026, Issue 1, 2026.
The Late Permian Dalong Formation in western Hubei has recently been recognized as a promising target for shale gas development. However, the comprehensive characterization of its pore structure remains limited. To elucidate the pore system of the Dalong shale, an integrated experimental approach was applied to outcrop‐derived samples.
Bei Liu, Yanlin Zhang, Wei Chen, Feng Li, Yaru Wen, Rui Lin, M.I. Herreros   +6 more
wiley   +1 more source

A >70‐Myr‐Long Geomagnetic Field Reversal Hyperactivity Across the Ediacaran‐Cambrian Transition

Geophysical Research Letters, Volume 52, Issue 23, 16 December 2025.
Abstract The long‐term variation of the geomagnetic field is a key constraint for unraveling the geodynamo processes and the evolution of Earth's deep interior. However, the geomagnetic reversal pattern during the Ediacaran–Cambrian transition remains elusive. Here we present an integrated magneto‐ and cyclo‐stratigraphic study of a ∼1.8‐Myr‐long, late
Fuyun Shen, Bin Wen, Phil J. A. McCausland, Zheng Gong, Zongmin Zhu, Fangzheng Liu, Jingyi Wang   +6 more
wiley   +1 more source

Tectonic Impact on Organic Matter Enrichment in Paleozoic Marine Shales from the Yangtze Block, SW China

Journal of Marine Science and Engineering
The enrichment of organic matter in marine shale is a complex process involving tectonic–sedimentary interactions. The tectonic setting exerts critical control over sediment provenance, marine biota, and subaqueous environmental conditions in shale ...
Dadong Liu, Mingyang Xu, Hui Chen, Qian Cao, Zhenxue Jiang, Xianglu Tang   +5 more
doaj   +1 more source

Characteristics of pore structures from the Lower Paleozoic shale gas reservoirs in northern Guizhou, South China

Journal of Natural Gas Geoscience, 2020
Pore structure in shale is an important factor influencing the storage capacity of a shale gas reservoir and the effect of shale gas development. Taking the core and outcrop shale samples from the Lower Cambrian Niutitang Formation and Lower Silurian ...
Xianqing Li, Yangyang Li, Jiehao Li, Xiaoyan Zou, Man Guo, Zhe Wang, Xueqing Zhang, Feiyu Wang   +7 more
doaj   +1 more source

Characteristics and Main Controlling Factors of Fractures within Highly-Evolved Marine Shale Reservoir in Strong Deformation Zone

Frontiers in Earth Science, 2022
Based on the systematical observations of cores, thin sections, and scanning electron microscope (SEM) sections, together with the testing data and characteristic parameters, this paper discussed the characteristics and controlling factors of fractures ...
Xuehui Zhou, Ruyue Wang, Zhili Du, Jing Wu, Zhonghu Wu, Wenlong Ding, Ang Li, Zikang Xiao, Zixian Cui, Xinghua Wang   +9 more
doaj   +1 more source

Study on the Mechanical Properties and Fracturing Damage Process of Shale With Preexisting Fractures Under Fluid–Solid Coupling Effects

International Journal of Energy Research, Volume 2025, Issue 1, 2025.
To investigate the influence of fractures on the hydraulic fracturing extraction of shale gas, this study conducted a fluid–solid coupling analysis of shale with preexisting fractures. Initially, the mineral composition and the distribution of microfractures and pores in the shale were analyzed using X‐ray diffraction (XRD) and argon ion scanning ...
Motian Tang, Xianfeng Zhang, Peng Cheng, Zhonghu Wu, Yili Lou, Dingding Zhang   +5 more
wiley   +1 more source

Black Shale Lithofacies of the Wufeng–Longmaxi Formation in the Southeast Margin of Chongqing, China

Geofluids, Volume 2025, Issue 1, 2025.
China’s shale gas has undergone nearly 20 years of exploration; unconventional oil and gas geological evaluation theories and research methods have been greatly enriched, but how to quickly, conveniently, and accurately identify the sweet spots of shale gas is still puzzling many researchers. This study focuses on the black shale of the Wufeng–Longmaxi
Junqing Liu, Qisen Gong, Chenye Guo, Shuang Du, Kai Wang, Bin Wu, Shihong Xiao, Lei Wen, Ping Guo, Zhihui Zhao, Leyi Zhang, Ping Lei, Zhiqiang Fan   +12 more
wiley   +1 more source