A total of 7 facies associations are interpreted and consist of 14 distinct lithofacies, with lithologies including conglomerates, sandstones, siltstones, mudstones, shales, and coals. ... northeastern, and northeastern parts of the Erlian Basin, respectively. Three coal depositional models were summarized in the sequence stratigraphic ...
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The lithofacies types of limited platform shale and tidal flat shale were different and relatively single, ... (Tang et al., 2016). In this formation, the coal seam was thin, usually dominated by coal lines, while the dark shale had a large cumulative thickness with a high abundance of organic matter (Chen et al., 2016). In addition, the ...
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DOI: 10.1016/j.marpetgeo.2024.106692 Corpus ID: 266833367; Reservoir characteristics and controlling factors of the middle–high maturity multiple lithofacies reservoirs of the Lianggaoshan Formation shale strata in the northeastern Sichuan basin, China
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This chapter reviews the characteristics and evolution of lithofacies paleogeography of marine strata in China based on sequence stratigraphy. It covers the …
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In this paper, we investigated depositional environments, sequence stratigraphy, lithofacies paleogeography and coal accumulation pattern of five major coal-accumulating periods including the...
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The Longtan Formation of the Upper Permian in the Sichuan Basin has become a significant target for shale gas exploration in recent years. Multiple methods, including outcrop observations, thin sections, total organic matter content, X-ray diffraction and scanning electron microscopy were used to investigate the mineralogy, shale …
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Download Citation | Lithofacies analysis and paleosedimentary evolution of Taiyuan Formation in Southern North China Basin | The Permian Taiyuan Formation contains alternate shale and coal ...
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Strong vertical heterogeneity exists in the Longtan Formation, and multiple lithologies can be found in the same lithofacies, including shale, sandstone, limestone, and coal seam. Therefore, the model can be divided into three layers from top to bottom.
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The late middle to late Eocene Skookumchuck Formation is well exposed in highwalls of the Centralia mine, southwest Washington. Three coal zones and intervening sandstone-rich successions occur in a 220-m-thick interval that extends from below the Smith to above the Tono No. 1 coal beds.
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The Balikpapan Formation coal and coaly shale samples exhibit a range of HI values from 73 to 252 mg HC/g TOC. ... Lithofacies of the Balikpapan Formation include …
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Upper Permian Longtan Formation Coal Measures in the Western Guizhou Region, South China Xiaoming Li, Xuan Tang,* Shaobin Guo, Jinchuan Zhang, Ende Deng, and Chaoli Lan ... and coal seam. (3) The six typical lithofacies assemblages were developed in the Longtan Formation, which represented differentsedimentary environments of the …
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The Eagle Ford formation is carbonate- and organic-rich shale deposited in the Late Cretaceous. The Austin Chalk is the overlying formation that is mainly made up of chalk and marl interbedded. ... Estimation of ash, moisture content and detection of coal lithofacies from well logs using regression and artificial neural network modelling. Fuel ...
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Lithofacies and Palynostratigraphy of Some Cretaceous and Paleocene Rocks, Surghar and Salt Range Coal Fields, Northern Pakistan. By Peter D. Warwick, Shahid Javed, S. Tahir A. Mashhadi, Tariq Shakoor, Asrar M. Khan, and A. Latif Khan ... Age of the Lumshiwal Formation; Lithofacies of the Hangu Formation. Coal Characteristics of …
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The Longtan Formation and Changxing Formation are the main coal-bearing series in the Lopingian. The Longtan Formation was mainly formed in a sea-land …
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Lithofacies associated within point bars have been well documented and an established link between deposition process, depositional form, and reservoir properties has been developed (Bridge and Tye, 2000; Hein and Cotterill, 2006; Hubbard et al., 2011; Smith, 1987).Point bar lithofacies form genetically related associations deposited in a …
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lithofacies relations of rock types in the Patala Formation indicate that the sandstone bodies were deposited as foreshore, tidal-channel, and washover-fan units.
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The presence of wave and tide structures is noteworthy in this lithofacies. The coal and carbonaceous beds association, with the very fine grained and silty lithofacies belong to central estuarine funnel setting. The association of dark grey to black shales with micritic limestone and oolitic (sideritic) ironstone is interpreted as products of ...
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The detailed depositional systems and basin evolution of Lower Cretaceous coal-bearing strata in the Erlian Basin of northeastern China were analyzed based on …
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When averaged across the four wells, the Yarragadee Formation shows quite an even distri- bution of lithofacies, whereas the cored intervals of Cadda Forma- tion and Cattamarra Coal Measures ...
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Coal was generally formed in warm and humid climatic conditions. Taiyuan formation coal lines were generally sandwiched in carbonaceous mudstone, reflecting warm and humid climatic conditions. 4.3. Shale mineral composition characteristics. The mineral and clay content of each sample were shown in Table 4. The mineral content …
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In addition, gray colored coal lithofacies clustered in the heavy thorium-bearing minerals ranges resulted in higher GR values among the coal in the geological formation. Figure 8
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Type 1 coarse-grain pebbly sandstone lithofacies association. This is the most dominant type of lithofacies association constituting the lower and middle part of the upper member of the formation (Fig. 3).It is comprised of thin, laterally discontinuous wedge shaped layers of intraformational conglomerate passing up-section into coarse …
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The characterization work was conducted on lithofacies and microlamina scales using core samples from the Chang 7 3 sub-member of the Triassic Yanchang Formation in the Ordos Basin, China. Samples were collected from a narrow interval with a depth range of less than 15 m, and the main characterization work was performed by …
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The lithofacies paleogeography maps based on third-order sequences were reconstructed and the distribution of coal accumulation centers and coal-rich belts were predicted. Distribution of coal ...
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Based on the comprehensive analysis of the mineral ternary diagram, TOC content, and lithofacies type classification, six lithofacies assemblages are identified in shales of the Dongyuemiao Formation in the Fuxing area: LF1–LF6: it is mainly identified in Unit 1, and multi-stage transgressive and regressive cycle sequences can be identified ...
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The Lianggaoshan Formation, which is located in the northeastern part of the Sichuan Basin, is an important shale oil producer. However, due to the effects of complex petrography, a wide range of maturity, and lower organic matter (OM) content in comparison to other areas, the pore characteristics of different lithofacies are unclear, …
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S 1 corresponds to the Benxi Formation and the lower part of Taiyuan Formation, S 2 corresponds to the middle and upper parts of Taiyuan Formation, and S 3 corresponds to the Shanxi Formation. The lithofacies paleogeography maps of three sequences are reconstructed based on the contours of a variety of lithological …
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The coal seams of the Shanxi formation are unevenly distributed. Coals with lower sulfur content are formed in the peat swamps of the deltaic-fluvial system. The author's research, however, shows that the coal seams of the Benxi and Taiyuan Formation are formed in coal-forming environments of the marine facies.
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The lithofacies paleogeography maps of three sequences are reconstructed based on the contours of a variety of lithological parameters including strata thickness, …
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The Balikpapan Formation coal and coaly shale samples exhibit a range of HI values from 73 to 252 mg HC/g TOC. ... Lithofacies of the Balikpapan Formation include conglomerate and sandstone (Cst), planar cross-bedded sandstone (Sp), massive sandstone (Sm), trough cross-bed sandstone (St), ripple cross-laminated sandstone (Sr), hummocky cross ...
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The Shanxi Formation is one of the most important coal-bearing strata in western Shandong Province, with the thickness being about 60 – 120 m, with an average of 100 m. This formation contains 2 – 3 coal seams, with two being the minable coal seams (C 2 and C 3), with average thickness of 1.2 m and 4.1 m, respectively. The lithology of …
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Lithofacies of Moscovian–Kasimovian — Late Carboniferous, ... This is a major period of coal formation in wet belts of Gondwana (South Africa, India, Australia, and South America; Ronov et al., 1984, Veevers and Powell, 1987, Visser, 1987, Williams, 1995) and northern China (Enos, 1995).
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The upper Permian Longtan Formation is widely distributed in southwestern China and is well known for multilayer coal and high organic shale, with significant shale gas potential that has yet to be fully explored and developed. ... bioclastic-bearing sandstone, fine sandstone, and coal seam. (3) The six typical lithofacies assemblages …
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The deposits within the MB2 member of the Mishrif Formation exhibit a division into five distinct lithofacies associations (Table 1): (1) subtidal mudstone to wackestone (LF-1); back-margin massive wackestone to packstone (LF-2); (2) high-energy bioclastic grainstone (LF-3); (3) swamp carbonaceous mudstone interbedded with …
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thick) and the Paleocene coal-bearing Hangu Formation (5 to 50 m thick) in the Surghar Range of north-central Paki-stan is complex. Both formations contain remarkably simi-lar lithofacies: one or two types of sandstone lithofacies; a combined lithofacies of mudstone, claystone, carbonaceous shale, and coal beds; and a rare carbonate …
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The shale of the Upper Ordovician Wufeng Formation and the Lower Silurian Longmaxi Formation in the Xichang Basin is the main replacement horizon for the shale gas exploration being conducted in the Sichuan Province, except for the Sichuan Basin. The fine identification and classification of the types of shale facies are important …
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