scholarly journals RECONSTRUCTION OF THE URENGOY FIELD DEPOSITS FORMATION BASED ON THE LITHOLOGY-MINERALOGY AND PARTICLE-SIZE ANALYSIS CHARACTERISTICS

2015 ◽  
pp. 32-40
Author(s):  
A. V. Parshukov ◽  
E. A. Mogutova ◽  
A. A. Nezhdanov
Keyword(s):  
Particle Size ◽  
Grain Size ◽  
Oil And Gas ◽  
Structural Features ◽  
Particle Size Analysis ◽  
Gas Condensate ◽  
Grain Size Analysis ◽  
Size Analysis ◽  
Material Supply ◽  
Genetic Interpretation

The results of detailed lithology-mineralogy studies and grain-size analysis of deposits from well No. 739 in the oil-and-gas condensate field Urengoy were generalized to investigate a degree of the Achimov deposits sandsilt rocks’ heritance of lithological and structural features of deposits of the shelf detritus material supply sources. This information is very important for reconstruction of the conditions of the Achimov reservoirs formation and for genetic interpretation of the lithology studies data.

scholarly journals Synthesis of ZnO-CdO Nanocomposites

2013 ◽  
Vol 1 (1) ◽  
pp. 11-14
Author(s):  
N. Sahu ◽  
◽  
R. K. Duchaniya ◽  
Keyword(s):  
Particle Size ◽  
Grain Size ◽  
Low Cost ◽  
Sol Gel ◽  
Particle Size Analysis ◽  
Synthesis Process ◽  
Size Analysis ◽  
X Ray Diffraction ◽  
X Ray ◽  
Scanning Electron

The ZnO-CdO nanocomposite was prepared by sol-gel method by using their respective nitrates. It is a simple and low cost method to prepare nanocomposites. The drying temperature and drying period of prepared gel was varied during the synthesis process. The prepared samples were characterized by using scanning electron microscope (SEM), particle size analysis (PSA), X-ray diffraction (XRD) and photoluminescence spectroscopy (PL) to get surface morphology, idea of getting particle of nanosized range so that further characterizations can be done, to study the optical property of synthesized nanocomposite and measure the band gap . The grain size determined by Scherrer’s formula was found to be between 30-50 nm.

scholarly journals Influence of α-Bi2O3 chemical prehistory on the morphology of the obtaining basic bismuth succinate

2021 ◽  
Vol 340 ◽  
pp. 01020
Author(s):  
Liubov Afonina ◽  
Evgeniya Timakova
Keyword(s):  
Electron Microscopy ◽  
Particle Size ◽  
Grain Size ◽  
Grain Size Analysis ◽  
Size Analysis ◽  
Medical Applications ◽  
Antibacterial Drug ◽  
Chemical Analyses ◽  
Monoclinic Modification ◽  
X Ray

The antibacterial drug, basic bismuth succinate of the composition Ñ2Í4(ÑÎÎBiO)2 is shown to obtain expediently by the interaction of bismuth oxide α-Bi2O3 with a succinic acid solution. Using the method of electron microscopy the influence of the chemical prehistory of obtaining the precursor, monoclinic modification of α-Bi2O3, on the morphological features of basic bismuth succinate synthesized from it has been investigated. The composition of Ñ2Í4(ÑÎÎBiO)2 was confirmed by the data of X-ray phase and chemical analyses. Based on the data of grain size analysis, the particle size of the obtained samples of basic bismuth succinate was estimated and the conditions for the synthesis of fine-crystalline C2H4(COOBiO)2, which is necessary for medical applications, were selected.

scholarly journals Investigation of Particle Size Distribution for Fine-Grained Soil Using a Grain Size Analysis Equipment Automated by X-ray Method

2000 ◽  
Vol 40 (2) ◽  
pp. 127-133
Author(s):  
Yukio Furukawa ◽  
Tatsushi Fujita ◽  
Tadayuki Kunihiro ◽  
Hisashi Tsuchiya ◽  
Yukio Saito
Keyword(s):  
Particle Size ◽  
Grain Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Grain Size Analysis ◽  
Size Analysis ◽  
Ray Method ◽  
X Ray ◽  
Fine Grained ◽  
Fine Grained Soil

scholarly journals Modern methods of grain size distribution of soils

2013 ◽  
pp. 302-308
Author(s):  
Volodymyr Radzii
Keyword(s):  
Particle Size ◽  
Grain Size ◽  
Size Distribution ◽  
Grain Size Distribution ◽  
Soil Mass ◽  
Particle Size Analysis ◽  
Soil Science ◽  
Size Analysis ◽  
Ecological Functions ◽  
Modern Methods

Grain size distribution of soil determines much of water and physical properties of the soil mass. However, it defines ecological functions and morphological memory of soils in the study of their genesis, evolution and use. This article describes the main methods of particle size analysis and suggests the modern methods used increasingly in the research in soil science, geology, chemical, pharmaceutical and other industries. Key words: particle size distribution of soil, sedimentograph, laser diffraction.

scholarly journals Changes in pedogenic processes during Pryluky times (Late Pleistocene) in the central part of the Volyn Upland

2019 ◽  
Vol 28 (2) ◽  
pp. 230-240
Author(s):  
O. S. Bonchkovskyi
Keyword(s):  
Grain Size ◽  
Sandy Loam ◽  
Size Composition ◽  
Loess Soil ◽  
Sediment Traps ◽  
Grain Size Analysis ◽  
Size Analysis ◽  
Good Correspondence ◽  
Genetic Interpretation ◽  
Parent Rocks

In the central part of the Volyn Upland, the Pryluky palaeosol unit have been studied in nine loess-soil sites (Boremel 1 - 3, Novyi Tik, Smykiv, Shybyn, Kolodezhi, Kovban, Novostav). Several sections were excavated along a slope in each studied site in order to reveal the palaeocatena and to study the most complete palaosol successions. The last were found in palaeorelief depressions, which were acting as sediment traps. The genetic interpretation of palaeosols was carried out on the basis on field macromorphological and analytical (micromorphology, grain-size analysis, content of humus and CaCO3) studies. In order to reconstruct the main features of palaeovegetation as an important factor of pedogenesis, pollen analysis of the palaeosols was carried out. It proved a good correspondence between a character of palaeovegetation and a palaeosol type. It has been shown that grain-size composition of the lower Prylyky soils strongly depends on that of parent rocks (Tyasmyn unit of hillwash sandy loam and Kaydaky unit of pedosediment).. The Chernozem-like polygenic soil is the most common within studied area. The lower part of soil has signs of podsolization (powder of SiO2, light color, low content of clay). The upper Pryluky soils are distorted by erosional and cryogenic processes (mainly by solifluction textures) that hampers the interpretation of diagenetic and original pedogenicprocesses. The abundant bioturbations in the subsoil (the largest number among the Late Plestocene soils), high content of humus, complex microaggregates, but leach in the СaCO3 have been established to Pryluky soil unit. The presence of relic pedogenic signs in the polygenetic soil, an assumption is made about the existence of several stages of its formation. The investigation of pedocomplexes confirm it. The study of well-developed pedocomplexes in sedimentation traps allows the allocation of those pedogenic phases during Pryluky times: pl1b1 – Podzolic, Cryptopodzolic, Albeluvisol, Albic Luvisol; pl1b2 – Luvic Chernozem, Chernic Chernozem and Cryptopodzolic,; pl1с – Umbrisol and Cambic Luvisol; pl3a – Luvic Cambisol; pl3b1 – Luvisol and Luvic Cambisol; pl3b2 – Mollic and Luvic Cambisol. 

Soil Particle Size Analysis Using X-Ray Absorption

1996 ◽  
Vol 1548 (1) ◽  
pp. 51-59 ◽  
Author(s):  
Stanley J. Vitton ◽  
Carl C. Nesbitt ◽  
Leon Y. Sadler
Keyword(s):  
Particle Size ◽  
Grain Size ◽  
Size Range ◽  
Particle Size Analysis ◽  
Size Analysis ◽  
Size Distributions ◽  
X Ray ◽  
Grain Size Distributions ◽  
X Ray Absorption ◽  
Representative Samples

The hydrometer method is the standard method of grain size analysis used in geotechnical engineering. Although the hydrometer method provides accurate grain size distributions and is relatively easy to conduct, it takes a minimum of 2 days to complete and is subject to operator error. In studies where small-magnitude changes or more rapid results are required, an alternative method to hydrometer testing is to use an automated particle size analysis instrument employing X-ray absorption. This technique passes a finely collated X-ray beam through a suspension of settling particle in a fluid. Because the intensity of the X-ray is directly related to the percentage mass of soil in a suspension, Stokes' law can be used to calculate the grain size distribution of a soil assuming an equivalent particle diameter for the soil grains. X-ray absorption has been found to produce accurate grain size distributions in the 75 μm to 1 μm size range when sample preparation adheres to AASHTO T88-90 specifications and suspension concentrations are approximately 2 percent by volume. Testing for particles sizes down to 1 μm takes approximately 20 min per sample. Technical concerns remaining involve obtaining representative samples of the soil in the 75 μm, to 1 μm size range suspension for testing. One method being evaluated is injection flow analysis, which is an inexpensive method of obtaining representative samples used with a variety of inorganic, industrial, and environmental materials in which direct sampling of fluid is required.

scholarly journals Grain-Size Distribution and Structural Characteristics of Varved Sediments from Lake Żabińskie (Northeastern Poland)

Quaternary ◽  
2019 ◽  
Vol 2 (1) ◽  
pp. 8 ◽  
Author(s):  
Maurycy Żarczyński ◽  
Jacek Szmańda ◽  
Wojciech Tylmann
Keyword(s):  
Particle Size ◽  
Grain Size ◽  
Layer Thickness ◽  
Grain Size Analysis ◽  
Size Analysis ◽  
Size Distributions ◽  
Particle Size Distributions ◽  
Grain Size Distributions ◽  
Northeastern Poland ◽  
Size Data

Typically, the description of varve microfacies is based on microscopic sedimentary structures, while standard grain-size analysis is commonly applied with lower resolution. Studies involving a direct comparison of varve microfacies and particle-size distributions, common for clastic environments, are scarce for biogenic varves. In this study, we analyzed nine-year resolution grain-size data from Lake Żabińskie (northeastern Poland) to detect differences between varve microfacies. Six varve microfacies were differentiated using grain-size distributions and sedimentological attributes (calcite layer thickness, dark layer thickness, mass accumulation rate). However, changes in particle-size distributions between different varve types are relatively small and indicate a similar source for the material deposited. Decomposition of grain-size distributions with the end-member approach allows recognition of relative changes for the deposition of allochthonous (mineral) and autochthonous (carbonates, (hydr)oxides) components. Grain-size data suggest that sources of allochthonous material remained constant, while varve formation was controlled mostly by in-lake processes.

Chemical pretreatment effects on grain size results of clastic sediments and soils

2021 ◽  
Author(s):  
Fruzsina Gresina ◽  
Zoltán Szalai ◽  
György Varga
Keyword(s):  
Particle Size ◽  
Grain Size ◽  
Earth Science ◽  
Particle Size Analysis ◽  
Laser Diffraction ◽  
Limiting Factors ◽  
Size Analysis ◽  
Chemical Pretreatment ◽  
Sediment Types ◽  
Innovation And Technology

<p>Determining the particle size is a current problem in many earth science sub-disciplines. Particle size distributions of sediments provide insight into the physicochemical environment, transport, accumulation and accumulation of particle formation, and post-deposition transformation processes. Therefore, granulometric proxies are widely used in paleoclimate research and many soil properties depend on their particle size distribution. Several studies are available comparing different laser diffraction devices, optical theories, and optical settings. Ignoring limitations of laser diffraction technique can result in poorly comparable granulometric data sets, however, inadequate chemical pretreatment procedures are also limiting factors, which are often overlooked. In this study, we examined different sediment types from various geomorphological environments from the Carpathian Basin: lake, eolian, fluvial sediments and paleosols. Our aim is to review and create a reliable methodology for laser diffraction particle size analysis and optical particle shape investigations. The widely used pretreatment methods (total of 13) were compared. The results showed that the samples with different textural parameters were differently affected by the preparation procedures. Compared to the silty textured loess and paleosol samples, applied techniques did not cause substantial changes of results of sandy materials, although the duration and the applied amount of the reagent had some impact on the grain size data.  Using cluster analysis, the various pretreatment methods could be separated from each other proving that these procedures are able to create substantially different grain size datasets. Shape parameters of the particles were also modified by the pretreatment methods, significant changes could be observed in the circularity, convexity characteristics. The study is supported by the ÚNKP-19-3 New National Excellence Program of the Ministry for Innovation and Technology. The support of the National Research, Development, and Innovation Office (projects NKFIH KH130337 and K120620) is gratefully acknowledged.</p>

Design, Testing and Field Deployment of an Online Sand Sampling and Particle Size Analysis Package

2021 ◽  
Author(s):  
Jonathan Ambrose ◽  
Alex Mackie ◽  
John Yung Lee ◽  
Ovidiu Cristian Bibic ◽  
M. Shamir A. Rahim ◽  
...  
Keyword(s):  
Particle Size ◽  
Closed Loop ◽  
Oil And Gas ◽  
Production Systems ◽  
Particle Size Analysis ◽  
Control Surface ◽  
Size Analysis ◽  
Time Data ◽  
Oil And Gas Exploration ◽  
Sand Control

Abstract Particle Size Analysis (PSA) of formation or produced sand is an important process in oil and gas exploration and production. This information is required to design downhole sand control, surface sand monitoring and removal systems, and to predict erosion in completion and production systems. A major operator in Malaysia required PSA data as well but found it a challenge as their wells, located offshore in Field Z, contain high amounts of contaminants such as TENORM, Mercury and Hydrogen Sulphide (H2S). Manually collecting produced sand samples was deemed too hazardous to people and the asset thus a closed loop Online Sand Sampling and PSA package was developed and deployed offshore. Samples were taken directly off flowline sample points, flowed through an online PSA system and continued its flow path to a closed loop drain line. The system therefore collected liquid, gas, and sand samples without any need for manual handling thereby eliminating exposure of harmful substances to personnel. A field laptop, running propriety software, connected via ethernet cable to the PSA system continuously measure and record the size of sand particles as they flow through the said system. This allowed the offshore execution team to view and record particle size data in real time. Data collated was available for further analysis onshore because the file format of the PSA software allows play back to refine particle images captured during the sampling operation. This was completed for 32 wells with the majority of the sampling providing good clear particle size information. Results were re-run and analysed again onshore by a sand management technical team from both the operator and service provider. The results were comparable to lab analysed samples of commonly used Laser Particle Size Analysis (LPSA). Therefore this first of its kind method provides a novel way for operaters to sample sand and solids in hazardous and also non hazardous environments.

Characterization of Atmosphere PM2.5 and Dustfall in Xining (China)

2013 ◽  
Vol 562-565 ◽  
pp. 1422-1427 ◽  
Author(s):  
Jun Tang ◽  
Fa Qin Dong ◽  
Qun Wei Dai ◽  
Yue Quan Deng
Keyword(s):  
Particle Size ◽  
Grain Size ◽  
Elemental Composition ◽  
Size Distribution ◽  
Grain Size Analysis ◽  
Size Analysis ◽  
Mineral Phase ◽  
Three Samples ◽  
Particle Size Analyzer

In this paper, mineral phase, elemental composition and size distribution were analysed by means of XRD, XRF and laser particle size analyzer respectively. According to the results of XRD, quartz, illite, calcite and albite were all found in three samples; Dolomite was found only in dustfall; Clinochlore was existed in both PM2.5 and soil. From the results of XRF, elemental compositon of three samples were focused on elemental Na, Si, Al, S, Ca, Fe, Mg, K. Based on the grain size analysis, the size distribution of dustfall mainly ranges from 1µm to 40µm.

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