2021年12月23日 · Five types of pyrite are observed during detailed FE-SEM analysis of the Es3x shale of the Paleogene Shahejie Formation in the Zhanhua Sag, BBB, that is, pyrite microcrystals, pyrite framboids, euhedral pyrite, welded pyrite, and framework pyrite.

2023年8月8日 · L3─medium-carbon siliceous shale facies, shows the characteristics of a hypoxic environment, with enhanced terrestrial supply and increased pyrite content. L2─low-carbon siliceous shale facies, has the characteristics of an aerobic environment with strong terrestrial supply, leading to a low content of pyrite.

2024年7月1日 · Shales of the Wufeng-Longmaxi formations in the basin-margin transition zone of southeastern Chongqing, China are characterized by high organic matter content and a significant presence of pyrite development.

Five types of pyrite are observed during detailed FE-SEM analysis of the Es3x shale of the Paleogene Shahejie Formation in the Zhanhua Sag, BBB, that is, pyrite microcrystals, pyrite framboids, euhedral pyrite, welded pyrite, and framework pyrite.

2022年5月12日 · Expansion of shale (containing as little as 0.1 weight percent pyrite) can cause differential heaving of the overlying ground, resulting in damage to floor slabs, foundations, and walls of structures founded on the shale. Pyrite is present in many varieties of metamorphic, sedimentary, and igneous rocks, and expansion due to the weathering of ...

Pyrite in shale increases the rate of organic matter cracking into oil and gas, which has been confirmed in experiments. Pyrite is a favorable hydrocarbon expulsion channel for shale oil and gas and a reservoir space for shale oil.

Pyrite, that occurs as framboids or fine- to coarse-grained euhedral-subhedral crystals, is a ubiquitous sulfide found in both host black shale and metalliferous ore horizons. This study delineates a three-stage growth of pyrite within the Chuanyanping and Sancha Ni Mo sulfide layers in western Hunan Province, South China, based on the micro ...

2024年4月1日 · In this regard, this study systematically analyzes the organic matter and pyrites in the continental shales in the Triassic Chang 7 3 submember, Ordos Basin to ascertain their types, as well as formation and evolutionary characteristics, so as to provide a basis for further understanding of continental shale oil in the basin. 2. Geological setting.

2024年3月26日 · Pyrite is widely distributed in lacustrine shales and has become a research focus in unconventional oil and gas exploration. Pyrite morphology is useful for identifying different types of organic matter and assessing shale oil enrichment in organic-rich shale.

2025年2月5日 · Pyrite-shale interaction in shale gas enrichment and development. Geophysical Prospecting for Petroleum. 2018, 57 (3): 332-343 https://doi.org/10.3969/j.issn.1000-1441.2018.03.002.