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Based on previous findings, shale pyrites were divided into three major classes (euhedral pyrites, framboidal pyrites (framboids) and metasomatic pyrites) and six sub-classes in this study. At the microscopic scale, each type of pyrite is associated with a different formation process.
22 sty 2024 · Here we discuss a relatively new geochemical proxy based on the trace element content of sedimentary pyrite in black shales.
4 kwi 2024 · 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.
23 gru 2021 · Pyrite is a common mineral in sedimentary rocks and is widely distributed in a variety of different morphologies and sizes. Pyrite is also widely distributed in the Es3x shale of the Eocene...
Strong correlations between the pyrite content and oil components reveal that pyrite indicates shale oil enrichment. Moreover, variations in pyrite type significantly influenced the enrichment behavior of shale oil. Types A and B pyrites contributing to reservoir space showed shale oil enrichment.
The formation of microcrystals at the oxic−anoxic interface shows that this interface is the active site that catalyzed the nucleation of pyrite in this shale. Pyrite framboids are the early diagenetic sulfide phase that is comprised of aggregates of microcrystalline cubes of pyrite, clustered in a spherical framboidal shape.
1 lip 2024 · In this study, we analyzed the evolution of the water body environment by examining variations in the crystal morphology, grain size, and aggregate type of pyrite. Afterward, we explored differences in sedimentary facies to enhance the understanding of the shale gas enrichment mode in southeastern Chongqing.
