Shale | Properties, Composition, Formation, Uses - Geology Science
2023年8月21日 · Shale is a laminated or fissile clastic sedimentary rock that composed of predominance of silt and clay other minerals , especially quartz and calcite. Characteristic properties of shale is breaks along thin laminae or parallel layering or bedding called fissility. It is most abundant sedimentary rock.
Organic-matter-rich shales of China - ScienceDirect
2019年2月1日 · These organic-matter-rich shales are the main source rocks for the Ordovician-hosted reservoirs of the Wubaiti, Luojiazhai, and Jiannan gas fields, as well as Carboniferous-hosted gas fields in the Sichuan Basin, South China (Zhao et al., 2011).
Crystallinity and formation of silica in Palaeozoic shales: A new ...
2023年4月1日 · Numerous studies have shown that silica, regardless its presence, can significantly affect shale reservoir properties, including their brittleness, matrix pore space and micro-fracture development, gas-bearing property and fracturing stimulation pattern (Zeng et al., 2013; Milliken et al., 2016; Zhao et al., 2017; Niu et al., 2018; Liu et al., 2...
Pore evolution in siliceous shales and its influence on shale gas ...
2022年1月1日 · The main missions are summarized as: (1) investigate pore types and physical properties among these siliceous shales; (2) definite the factors that control shale pore structures; (3) compare methane sorption capacities of these siliceous shales; (4) establish a pore evolution model for the siliceous shales.
Mechanisms of Reservoir Space Preservation in Ultra-Deep Shales …
1 天前 · This approach resulted in the identification of four lithofacies combinations—siliceous shale facies, carbonate shale facies, clay shale facies, and mixed shale facies—as well as 16 subcategories of lithofacies. The results show that the shale samples are located in the siliceous shale lithofacies area.
Micropore Structural Heterogeneity of Siliceous Shale Reservoir …
2019年9月11日 · The size distribution of micropore and mesopore in siliceous shale (<50 nm) was determined by low pressure nitrogen adsorption, the large pore size (>50 nm) was determined by the high-pressure mercury injection method, and the fractal dimensions of different pore sizes were calculated respectively.
Nanoscale pore structure and fractal characteristics of lacustrine ...
1 天前 · The Upper Cretaceous Qingshankou Formation’s lacustrine shales in the Songliao Basin are among China’s most promising shale oil reservoirs. To elucidate their pore and fractal characteristics, a comprehensive set of analyses encompassing total organic carbon (TOC), X-ray diffraction (XRD), and low-temperature N2 adsorption (LTNA), Rock-Eval pyrolysis experiments and two-dimensional nuclear ...
Shale pore characteristics and their impact on the gas-bearing
2024年7月23日 · For physical properties between deep shale gas reservoirs and medium and shallow reservoirs in southern Sichuan, the porosity, pore type, and pore structure show the biggest differences, key ...
Classification of Sedimentary Rocks - University of Kansas
Some typical rock names are "black thin-bedded micaceous shale," "gray massive, medium-grained glauconitic quartz sandstone," "tan siliceous quartz pebble conglomerate," and "white vuggy foraminiferal limestone." Graywacke currently has two meanings. To some, it denotes a feldspar-quartz sandstone with more than 20 (or 15) percent pelitic matrix.
Shale Rock: Geology, Composition, Uses - ThoughtCo
2020年8月2日 · Shale is classified based on its mineral content. There is siliceous shale (silica), calcareous shale (calcite or dolomite), limonitic or hematitic shale (iron minerals), carbonaceous or bituminous shale (carbon compounds), and phospatic shale (phosphate). The color of shale depends on its composition.