Intragranular fractures within tight sandstone reservoirs in the Hangjinqi area, northern Ordos Basin, China: Morphology, intensity and controlling factors

Editorial Material Geosciences, Multidisciplinary

Advances in the study of natural fractures in deep and unconventional reservoirs

Lei Gong et al.

FRONTIERS IN EARTH SCIENCE (2023)

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Editorial Material Geosciences, Multidisciplinary

Theory, Technology and Practice of Unconventional Petroleum Geology

Caineng Zou et al.

JOURNAL OF EARTH SCIENCE (2023)

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Review Energy & Fuels

Pore network characterization of shale reservoirs through state-of-the-art X-ray computed tomography: A review

Qing Liu et al.

Summary: X-ray computed tomography (X-ray CT) scanning is a non-destructive visualization technology that can be used to characterize multiscale shale pore structures and assess their permeability. Various imaging techniques, such as micro-CT, nano-CT, FIB-SEM, and contrast agent injections, provide a powerful approach for evaluating shale microstructures. Additionally, digital rock physics (DRP) based on 3D visualization can be used for flow modeling and predicting transport properties. CT scanning can also capture the significant evolution of microstructures during geological processes or hydrocarbon exploitation.

GAS SCIENCE AND ENGINEERING (2023)

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Article

粗粒料及粒间微生物胶结的破碎-强度-能量耗散研究进展

Minqiang Meng et al.

Zhongguo Kexue Jishu Kexue/Scientia Sinica Technologica (2022)

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Article Energy & Fuels

Reservoir Densification, Pressure Evolution, and Natural Gas Accumulation in the Upper Paleozoic Tight Sandstones in the North Ordos Basin, China

Ren Wang et al.

Summary: This study established a porosity evolution model, pressure evolution process, and natural gas charging history for tight sandstone reservoirs. It was found that reservoir densification aided in the formation of paleo-pressure, and gas migration was predominantly driven vertically by gas expansion force rather than buoyancy.

ENERGIES (2022)

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Article Energy & Fuels

Natural fractures and their contribution to tight gas conglomerate reservoirs: A case study in the northwestern Sichuan Basin, China

Lianbo Zeng et al.

Summary: Well-developed natural fractures in the tight gas conglomerate reservoirs of the northwestern Sichuan Basin greatly contribute to porosity and permeability, serving as storage space and fluid flow conduits. Open fractures make up over 70% of porosity, with local permeability 3-5 orders higher than matrix reservoirs. Natural fracture intensity correlates significantly with natural gas productivity, with fracture orientation impacting productivity.

JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING (2022)

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Article Geosciences, Multidisciplinary

Diverse effects of intragranular fractures on reservoir properties, diagenesis, and gas migration: Insight from Permian tight sandstone in the Hangjinqi area, north Ordos Basin

Shuo Qin et al.

Summary: This study investigates the morphology and development characteristics of intragranular fractures in the He-1 Member tight sandstones in the Hangjinqi area, and their effects on physical properties, reservoir diagenesis, and gas migration. The results show that intragranular fractures greatly enhance permeability but have limited direct contribution to total porosity. The study is important for guiding the evaluation and exploration of tight sandstone reservoirs in the Ordos Basin and other basins with similar settings around the world.

MARINE AND PETROLEUM GEOLOGY (2022)

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Article Energy & Fuels

Origin of authigenic kaolinite with implications for Permian tight gas sandstone reservoirs in the northern Ordos Basin, central China

Jiachen Gao et al.

Summary: This study investigates the origin and impact of authigenic kaolinite in tight gas sandstones in the Hangjinqi gas field, China. The results suggest that the authigenic kaolinite is derived from the dissolution of K-feldspar and affects the reservoir quality by reducing permeability and gas saturation.

JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING (2022)

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Article Geosciences, Multidisciplinary

Microfracture Characterization in Sandstone Reservoirs: A Case Study from the Upper Triassic of Syria's Euphrates Graben

Ibrahem Yousef et al.

Summary: This study investigates the microfractures and mineralization in sandstones in the Euphrates Graben area using various analytical methods. The study identifies various types of microfractures, with open fractures improving reservoir and permeability and cemented fractures reducing these properties. The study also identifies common siderite and pyrite cements, which form in different diagenetic environments. The formation of these microfractures is believed to be associated with tectonic, overpressure, and diagenetic processes.

JOURNAL OF EARTH SCIENCE (2022)

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Article Energy & Fuels

Process of porosity loss and predicted porosity loss in high effective stress sandstones with grain crushing and packing texture transformation

Yiming Yan et al.

Summary: The study shows that grain crushing, grain size, and grain packing texture all play a role in porosity reduction during compaction in deep buried sandstone. The transformation of grain packing texture and the development of a dynamic equilibrium to describe grain crushing in sandstone during compaction were observed. It was also found that a quantitative evaluation method considering grain breakage and packing texture evolution stages could be used for predicting compaction porosity loss in sandstone.

JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING (2021)

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Article Geosciences, Multidisciplinary