Controlling factors of tight sandstone gas accumulation and enrichment in the slope zone of foreland basins: The Upper Triassic Xujiahe Formation in Western Sichuan Foreland Basin, China

Deng, Jian; Liu, Mingjie; Ji, Yongcheng; Tang, Dahai; Zeng, Qinggao; Song, Linke; Tan, Xiucheng; Zeng, Wei; Lian, Chengbo

doi:10.1016/j.petrol.2022.110474

Cited by 10 publications

(7 citation statements)

References 47 publications

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“…The basin has a rhombic shape. The structure is characterized by a multistructural boundary and multistructural system controlled by deep faults. − …”

Section: Geological Settingsmentioning

confidence: 99%

Gas–Source Comparison and Hydrocarbon Generation and Expulsion Histories of the Main Source Rocks of the Middle Jurassic Shaximiao Formation, Western Sichuan Basin

Zeng,

Zuo,

Zheng

et al. 2023

ACS Omega

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“…The basin has a rhombic shape. The structure is characterized by a multistructural boundary and multistructural system controlled by deep faults. − …”

Section: Geological Settingsmentioning

confidence: 99%

Gas–Source Comparison and Hydrocarbon Generation and Expulsion Histories of the Main Source Rocks of the Middle Jurassic Shaximiao Formation, Western Sichuan Basin

Zeng,

Zuo,

Zheng

et al. 2023

ACS Omega

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“…Tight sandstone gas is a key field of unconventional oil and gas exploration and development at present. It has great exploration potential and is an important support for increasing China's natural gas production in the future (Deng et al, 2022; Huang et al, 2022; H. Li et al, 2019; Pan et al, 2021; Sun et al, 2019; Y. J. Zhong et al, 2019; Zou et al, 2018). In recent years, great breakthroughs have been made in the exploration of tight sandstone gas reservoirs of Shaximiao Formation in Sichuan Basin.…”

Section: Introductionmentioning

confidence: 99%

Pore‐throat structure characteristics and fluid mobility analysis of tight sandstone reservoirs in Shaximiao Formation, Central Sichuan

et al. 2023

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The pore‐throat structure and fluid mobility are the key factors of tight sandstone reservoir classification and evaluation. Taking the Jurassic Shaximiao Formation tight sandstone reservoir in Central Sichuan Basin as an example, 19 samples were analysed by casting thin sections, scanning electron microscopy, high‐pressure mercury injection and nuclear magnetic resonance to clarify the pore‐throat structure, the fluid motility and its controlling factors. The results show that the pore type of Shaximiao Formation tight sandstone reservoir consist of intergranular pores, dissolved pores and a few microfractures. Based on the feature of capillary pressure curve, the pore‐throat structure was classified into three types, corresponding to different movable fluid characteristics. The Type I has large pore and throat radius, good pore‐throat connectivity, small fractal dimension, weak reservoir heterogeneity and strong fluid motility. The distribution range of pore‐throat radius is mainly from 0.3 to 1.1 μm and the average movable fluid porosity (MFP) and movable fluid saturation (MFS) are 6.04% and 49.93%. The Type II has poor pore‐throat sorting, weak fluid motility and the distribution range of pore‐throat radius is 0.01–0.03 μm and 0.2–0.8 μm. The average MFP and MFS of Type II are 1.13% and 14.3%. The Type III has the smallest pore‐throat radius and the largest fractal dimension, corresponding to the most complex pore‐throat structure, which lead to the worst fluid mobility. The average MFP and MFS are 0.49% and 12.76%. The fluid mobility of the tight sandstone reservoir is affected by physical properties and pore‐throat structure. The reservoirs with large pore‐throat size, good connectivity between pore and throat, and low heterogeneity have higher MFP and saturation. Moreover, the mineral compositions have different effects on fluid mobility of the tight sandstone. The feldspar positively affects fluid mobility, while the clay minerals negatively affect fluid mobility.

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“…The successful development of tight oil in America provides a good guide for the exploration of tight oil in the world. As a result, several tight oil reservoirs have been developed in Canada, Russia, India, Europe, and the Middle East. − Tight oil reservoirs also exist in China, such as Ordos Basin, Tarim Basin, , Sichuan Basin, Songliao Basin, and Junggar Basin. , However, the question of the source of the oil has not been well resolved. Because of the complex history of oil and gas injection, a single research method usually cannot provide reasonable results.…”

Section: Introductionmentioning

confidence: 99%

“…As a result, several tight oil reservoirs have been developed in Canada, Russia, India, Europe, and the Middle East. 2−6 Tight oil reservoirs also exist in China, such as Ordos Basin, 7 Tarim Basin, 8,9 Sichuan Basin, 10 Songliao Basin, 11 and Junggar Basin. 12,13 However, the question of the source of the oil has not been well resolved.…”

Section: Introductionmentioning

confidence: 99%

Geochemistry Characteristics of Source Rocks and Oil–Source Correlation in the Gaosheng Area of the Western Depression in the Liaohe Basin, Northeastern China

Zhao,

Jiang,

Pang

et al. 2023

Energy Fuels

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Controlling factors of tight sandstone gas accumulation and enrichment in the slope zone of foreland basins: The Upper Triassic Xujiahe Formation in Western Sichuan Foreland Basin, China

Cited by 10 publications

References 47 publications

Gas–Source Comparison and Hydrocarbon Generation and Expulsion Histories of the Main Source Rocks of the Middle Jurassic Shaximiao Formation, Western Sichuan Basin

Gas–Source Comparison and Hydrocarbon Generation and Expulsion Histories of the Main Source Rocks of the Middle Jurassic Shaximiao Formation, Western Sichuan Basin

Pore‐throat structure characteristics and fluid mobility analysis of tight sandstone reservoirs in Shaximiao Formation, Central Sichuan

Geochemistry Characteristics of Source Rocks and Oil–Source Correlation in the Gaosheng Area of the Western Depression in the Liaohe Basin, Northeastern China

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