Turonian-Senonian organic-rich sedimentary strata and coal facies in Parnassos-Ghiona Unit, Central Greece: An assessment of palaeoenvironmental setting and hydrocarbon generation potential

Damoulianou, Maria-Elli; Kalaitzidis, Stavros; Pasadakis, Nikos

doi:10.1016/j.coal.2022.104029

Cited by 5 publications

(2 citation statements)

References 39 publications

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“…The depositional environment constrains the characteristics of coal accumulation, the petrographic composition, and the spatial combinations of coal seams [14,31,[53][54][55], which largely provide the material basis for CBM generation. When the depositional conditions are good, the coal seam thickness is large, and its distribution is stable, leading to a significant possibility of CBM gas production.…”

Section: Constraint Of the Depositional Environment On Coal Formationmentioning

confidence: 99%

Geological Constraints on the Gas-Bearing Properties in High-Rank Coal: A Case Study of the Upper Permian Longtan Formation from the Songzao Coalfield, Chongqing, Southwest China

Chen,

Wang,

Tian

et al. 2024

Energies

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The Permian Longtan Formation in the Songzao coalfield, Southwest China, has abundant coalbed methane (CBM) stored in high-rank coals. However, few studies have been performed on the mechanism underlying the differences in CBM gas content in high-rank coal. This study focuses on the characterization of coal geochemical, reservoir physical, and gas-bearing properties in the coal seams M6, M7, M8, and M12 based on the CBM wells and coal exploration boreholes, discusses the effects of depositional environment, tectono-thermal evolution, and regional geological structure associated with CBM, and identifies major geological constraints on the gas-bearing properties in high-rank coal. The results show that high-rank coals are characterized by high TOC contents (31.49~51.32 wt%), high Tmax and R0 values (averaging 539 °C and 2.17%), low HI values (averaging 15.21 mg of HC/g TOC), high porosity and low permeability, and high gas-bearing contents, indicating a post-thermal maturity and a good CBM production potential. Changes in the shallow bay–tidal flat–lagoon environment triggered coal formation and provided the material basis for CBM generation. Multistage tectono-thermal evolution caused by the Emeishan mantle plume activity guaranteed the temperature and time for overmaturation and thermal metamorphism and added massive pyrolytic CBM, which improved the gas production potential. Good geological structural conditions, like enclosed fold regions, were shown to directly control CBM accumulation.

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Section: Constraint Of the Depositional Environment On Coal Formationmentioning

confidence: 99%

Geological Constraints on the Gas-Bearing Properties in High-Rank Coal: A Case Study of the Upper Permian Longtan Formation from the Songzao Coalfield, Chongqing, Southwest China

Chen,

Wang,

Tian

et al. 2024

Energies

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“…The specific meaning of the above indices has been introduced in the previous studies, − which can reveal the coal-formation plants, tissue preservation, gelification, hydrological conditions, and redox conditions of a peat mire and is not repeated here. The maceral-based coal facies indices have been frequently used to estimate the depositional environments of coal-bearing strata in different regions. − Their utilization has also been a subject of debate. , The Pennsylvanian and Permian coals studied by Calder and Diessel were formed from the Laurasian Westphalian flora of Nova Scotia and from the Permian Gondwana flora of New South Wales, respectively. In this study, the Cretaceous coals were formed from the angiosperm flora of the Shengli coalfield of Inner Mongolia .…”

Section: Introductionmentioning

confidence: 99%

Assessing the Depositional Environment of Cretaceous Ge-Rich Coals in the Wulantuga Mine, Shengli Coalfield, Northeastern China

Wang,

Chen,

Tang

et al. 2024

Energy Fuels

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To provide a new perspective on the formation of the Ge-rich coals, the depositional environment of the Wulantuga coals was studied with the incorporation of coal maceral and geochemistry-based indicators. The results show that the No.6 coal seam in the Wulantuga mine was formed in a mire with a succession of swamps, fens, and marsh. The average contents of Ge in coals formed in different mires, from high to low, are swamp (220 μg/g), marsh (205 μg/g), and fen (185 μg/g). The accumulation of the No.6 seam has been divided into four stages from bottom to top based on the identified coal facies types. The reducing condition and gelification of the ecosystem environment ranged from strong to weak, to strong, and back to weak. The variation of Ge concentrations also occurs in the same way. Strong reduction and gelification of the ecosystem environments can favor Ge enrichments in the Wulantuga coals. Sufficient sources and favorable conditions are essential for the unusual Ge enrichments in coals. This study provides a new perspective for the depositional environment of Ge-rich coals and is useful for the exploration of Ge-rich coal resources.

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Geochemical and mineralogical evidence for the formation of siderite in Late Permian coal-bearing strata from western Guizhou, SW China

et al. 2023

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Turonian-Senonian organic-rich sedimentary strata and coal facies in Parnassos-Ghiona Unit, Central Greece: An assessment of palaeoenvironmental setting and hydrocarbon generation potential

Cited by 5 publications

References 39 publications

Geological Constraints on the Gas-Bearing Properties in High-Rank Coal: A Case Study of the Upper Permian Longtan Formation from the Songzao Coalfield, Chongqing, Southwest China

Geological Constraints on the Gas-Bearing Properties in High-Rank Coal: A Case Study of the Upper Permian Longtan Formation from the Songzao Coalfield, Chongqing, Southwest China

Assessing the Depositional Environment of Cretaceous Ge-Rich Coals in the Wulantuga Mine, Shengli Coalfield, Northeastern China

Geochemical and mineralogical evidence for the formation of siderite in Late Permian coal-bearing strata from western Guizhou, SW China

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