Lithofacies, stable isotopic composition, and stratigraphic …
Lithofacies, stable isotopic composition, and stratigraphic evolution of microbial and associated carbonates, Green River Formation (Eocene), Piceance Basin, Colorado
Glacial Lithofacies and Stratigraphy
Lithofacies, a term commonly used by glacial geologists, refers to the physical and chemical properties of a sediment or rock. ... This record provides a global chronological framework based upon cyclical changes in the oxygen isotope composition of ice cores and deep marine sediments. Isotopic fractionation of oxygen into heavier and lighter ...
Pore structure of the mixed sedimentary reservoir of …
Taking mineral composition, sedimentary structure, and organic matter characteristics into account, the lithofacies classification comprising sedimentary structure + organic matter abundance ...
Lithofacies Characteristics and Sweet Spot …
In contrast to marine shale oil reservoirs, lacustrine shale exhibits rapid lithofacies changes and strong mineral compositional heterogeneity, posing new challenges for the evaluation and distribution prediction of shale oil sweet …
Lithofacies composition and geological significance of …
Lithofacies composition and geological significance of black rock series: a case study from the lower Cambrian Qiongzhusi Formation in Huize area, eastern Yunnan province ... Lithologic changes in ...
Sedimentary facies | Geology, Stratigraphy
sedimentary facies, physical, chemical, and biological aspects of a sedimentary bed and the lateral change within sequences of beds of the same geologic age.Sedimentary rocks can be formed only where sediments are deposited long enough to become compacted and cemented into hard beds or strata.Sedimentation commonly occurs in areas where the sediment lies …
Correlation and response of astronomical forcing in …
The term "lithofacies" is commonly used to distinguish and describe variations and relationships between different rock layers or rock units (Duan et al., 2001; Leeder, 2011).The cyclic variations in sedimentary environments driven by orbital factors, including periodic changes in water depth, redox conditions, or material input, are preserved in the geological record as …
Lithofacies, stable isotopic composition, and stratigraphic …
Limestone beds consist of littoral to sublittoral lithofacies: bioclastic and oolitic grainstones, oolitic wackestone, intraclastic rudstone, stromatolites, and thrombolites. Facies …
Depositional conditions of shale lithofacies during the Late …
Sea-level changes control shale lithofacies development patterns. Abstract. ... Notably, the thickness, lithofacies, mineral composition, and total organic carbon content varied noticeably throughout these marine shales within each graptolite biozone. The WF1–LM1 shales mainly accumulated under anoxic conditions that lacked terrigenous input ...
Lithofacies composition and geological significance of …
Lithofacies is an important basis for the characterization of source rocks, shale oil and tight oil reservoirs and the evaluation of oil and gas reservoirs. In this study, a well-developed Qiongzhusi Formation section in Huize area was selected to study the lithofacies features and their evolution and the following conclusions are obtained.
Linking marine core lithofacies and mineral and grain-size …
Linking marine core lithofacies and mineral and grain-size compositions on the Baffin Island margin: changes in provenance and transport
Differential mineral diagenetic evolution of lacustrine shale
Lithofacies refer to the rock types and their combinations formed in a certain sedimentary environment, resulting from the interaction of the paleosedimentary environment and sedimentary mechanism (Slatt and Rodriguez, 2012).Characteristics such a color, mineral composition, texture structure, and TOC characteristics can be used as the basis and symbols …
Lithofacies Characteristics and Sweet Spot Distribution of …
In contrast to marine shale oil reservoirs, lacustrine shale exhibits rapid lithofacies changes and strong mineral compositional heterogeneity, posing new challenges for the evaluation and distribution prediction of shale oil sweet spots. The oiliness, reservoir properties, oil fluidity, and fracability of different lithofacies were analyzed using emission-scanning …
Sedimentary lithofacies – an introduction
The focal point in each article is the lithofacies, the basic descriptive unit for all sedimentary rocks; it is the starting point for any investigation. Lithofacies are the cornerstone for a hierarchy of analytical tools: Lithofacies (sensu stricto). A hierarchy of surfaces that bound or separate individual lithofacies and lithofacies assemblages.
Unravelling the impact of lithofacies on the composition of …
The influence of lithofacies on the4 composition of NSO (nitrogen-, sulfur- and oxygen- containing) compounds in unconventional petroleum systems has been investigated using examples of biogenic ...
Lithofacies architecture, composition, and age of the …
Record detail - Lithofacies architecture, composition, and age of the Carboniferous Teplice Rhyolite (German–Czech border): ... which were dominated by lithic-rich ignimbrites with lateral lithofacies changes (fiamme-rich to crystal-rich) covered by lava flows/domes. Eruption style was low pyroclastic fountaining alternated with effusive lava ...
Sedimentary Evolution Characteristics of Fine-Grained …
The lithofacies exhibit frequent lithofacies transitions and a significant spatiotemporal inheritance. In the SQ 2 -LHST, the Jiangnan-Xuefeng uplift controlled the …
Depositional conditions of shale lithofacies during the Late …
The shale lithofacies shows obvious heterogeneity during the Late Ordovician-Early Silurian in the Upper Yangtze area, SW China. To elucidate the Wufeng-Longmaxi shale lithofacies' formation mechanism, we conducted high-resolution cyclostratigraphic analysis and geochemical studies of the W2 well. The findings indicate significant disparities in the sedimentation rates of the …
Fine-Grained Lithofacies Types and Sedimentary Model of …
The lithofacies of the Longtan Formation greatly varies in the vertical direction, with various lithofacies such as mudstone, coal seam, and siltstone appearing alternately, resulting in a large variation in the mineral composition proportion in the vertical direction and showing significant changes in the sedimentary environment and the ...
Frontiers | Geochemical, Mineralogical, and …
From the perspective of stratigraphic unit composition, the lithofacies composition of different sub-members also shows significant differences. Ek 2 1 is dominated by calcareous shale lithofacies; the lithofacies …
Characteristics of Lithofacies in Deep Shale Gas Reservoirs in …
In order to determine the mineralogical composition and lithofacies change in the vertical direction, the mineralogical composition and clay mineral type and content of 120 samples were quantitatively tested by using a PanalyticalX'Pert PRO MPD X-ray diffractometer, and the shale lithofacies types were classified according to the quantitative ...
LINKING MARINE CORE LITHOFACIES AND MINERAL …
Variations in the mineral composition of lithofacies can be driven by two, possibly linked, processes: 1) changes in sediment provenance, and/or 2) changes in grain size. Changes in the provenance of glacial marine sediments in western Baffin …
The genetic relationship between paleoenvironment, mineral …
Changes of sedimentary environments recorded in the Late Ordovician–Early Silurian sedimentary succession can be reflected in mineral composition and lithofacies of shales. Outcrops and cores from this set of shales in the Sichuan Basin, China, are analyzed. The results show that quartz, clay minerals, and carbonate are the main minerals.
Lithofacies architecture, composition, and age of the …
Lithofacies architecture, composition, and age of the Carboniferous Teplice Rhyolite (German–Czech border): Insights into the evolution of the Altenberg-Teplice Caldera ... abrupt changes in lithofacies (lateral and/or vertical), tectonic collapse of volcanic structures, among others (Lucchi, 2013; Martí et al., 2018). Stratigraphic ...
Petroleum Geology & Experiment
Signs of lithofacies rhythm change, etc. Layer coupling Seventh Order < 0.000 1 0.01–0.5 Near 10 000-year Milan-kovitch cycles Identification marks of changes in component, texture, structure, etc. Lithofacies layer Fig. 2 Sixth-order and seventh-order sequence and lithofacies composition in Dongying Sag, Bohai Bay Basin
Identification of lithofacies and prediction of mineral composition …
It is indicated that mineral composition and lithofacies types of shale have a certain impact on gas source and reservoir performance. ... Shale lithofacies also change with the depositional ...
Lithofacies
Hence, the lithofacies allow us to connect vertical changes in geology to lateral changes in a predictive manner (i.e., facies associations). The seismic lithofacies can be represented by …
Lithofacies architecture, composition, and age of the …
Horizontal and vertical lithofacies changes in pyroclastic deposits, progressive infill, and faulting-related feeding conduits imply eruptions through fissure vents/faults. Intra-caldera …
Lithological Composition, Lithostratigraphy, and Lithofacies …
The following lithofacies types of PS sediments are distinguished: Volga (Absheron), Gobustan, Kur (including Geilyar (Lengebiz) sub-facies), Pre-Caspian, and South-Caspian. ... Because of the similarity in mineral composition of the Productive Series deposits of the Absheron oil and gas-bearing region and that one of the modern sediments of ...