scholarly journals Basaltic dyke eruptions at Piton de La Fournaise: characterization of the eruptive products with implications for reservoir conditions, conduit processes and eruptive dynamics

2020 ◽  
Vol 175 (3) ◽  
Author(s):  
Simon Thivet ◽  
Lucia Gurioli ◽  
Andrea Di Muro
Keyword(s):  
Piton De La Fournaise ◽  
Eruptive Dynamics ◽  
Reservoir Conditions ◽  
Conduit Processes

scholarly journals Characterization of juvenile pyroclasts from the Kos Plateau Tuff (Aegean Arc): insights into the eruptive dynamics of a large rhyolitic eruption

2008 ◽  
Vol 71 (6) ◽  
pp. 643-658 ◽  
Author(s):  
Caroline Bouvet de Maisonneuve ◽  
Olivier Bachmann ◽  
Alain Burgisser
Keyword(s):  
Eruptive Dynamics ◽  
Aegean Arc

scholarly journals Applying of the Artificial Neural Networks (ANN) to Identify and Characterize Sweet Spots in Shale Gas Formations

2018 ◽  
Vol 35 ◽  
pp. 03008 ◽  
Author(s):  
Edyta Puskarczyk
Keyword(s):  
Shale Gas ◽  
Data Set ◽  
Shale Formations ◽  
Geological Interpretation ◽  
Reservoir Conditions ◽  
Kohonen Networks ◽  
Gas Bearing ◽  
Sweet Spots

The main goal of the study was to enhance and improve information about the Ordovician and Silurian gas-saturated shale formations. Author focused on: firstly, identification of the shale gas formations, especially the sweet spots horizons, secondly, classification and thirdly, the accurate characterization of divisional intervals. Data set comprised of standard well logs from the selected well. Shale formations are represented mainly by claystones, siltstones, and mudstones. The formations are also partially rich in organic matter. During the calculations, information about lithology of stratigraphy weren’t taken into account. In the analysis, selforganizing neural network – Kohonen Algorithm (ANN) was used for sweet spots identification. Different networks and different software were tested and the best network was used for application and interpretation. As a results of Kohonen networks, groups corresponding to the gas-bearing intervals were found. The analysis showed diversification between gas-bearing formations and surrounding beds. It is also shown that internal diversification in sweet spots is present. Kohonen algorithm was also used for geological interpretation of well log data and electrofacies prediction. Reliable characteristic into groups shows that Ja Mb and Sa Fm which are usually treated as potential sweet spots only partially have good reservoir conditions. It is concluded that ANN appears to be useful and quick tool for preliminary classification of members and sweet spots identification.

Characterization of the unidirectional corrosion of oilwell cement exposed to H2S under high-sulfur gas reservoir conditions

RSC Advances ◽  
2015 ◽  
Vol 5 (87) ◽  
pp. 71529-71536 ◽  
Author(s):  
Zaoyuan Li ◽  
Tao Gu ◽  
Xiaoyang Guo ◽  
Xiaowei Cheng
Keyword(s):  
Gas Reservoir ◽  
Exposed Sample ◽  
Reservoir Conditions

A dense gypsum layer was formed on the surface of the gas-exposed sample.

Characterization of reservoir conditions for CO2 storage using a dimensionless Gravitational Number applied to the North German Basin

2014 ◽  
Vol 7 ◽  
pp. 209-220 ◽  
Author(s):  
Alexander Kissinger ◽  
Vera Noack ◽  
Stefan Knopf ◽  
Dirk Scheer ◽  
Wilfried Konrad ◽  
...  
Keyword(s):  
Co2 Storage ◽  
North German Basin ◽  
The North ◽  
Reservoir Conditions ◽  
German Basin

Serreta 1998–2001 submarine volcanic eruption, offshore Terceira (Azores): Characterization of the vent and inferences about the eruptive dynamics

2018 ◽  
Vol 356 ◽  
pp. 127-140 ◽  
Author(s):  
David Casas ◽  
Adriano Pimentel ◽  
José Pacheco ◽  
Eleonora Martorelli ◽  
Andrea Sposato ◽  
...  
Keyword(s):  
Volcanic Eruption ◽  
Eruptive Dynamics

scholarly journals Characterization of the anthranilate degradation pathway in Geobacillus thermodenitrificans NG80-2

Microbiology ◽  
2010 ◽  
Vol 156 (2) ◽  
pp. 589-595 ◽  
Author(s):  
Xueqian Liu ◽  
Yangpeng Dong ◽  
Xiaomin Li ◽  
Yi Ren ◽  
Yanxia Li ◽  
...  
Keyword(s):  
Gene Cluster ◽  
Degradation Pathway ◽  
Pcr Analysis ◽  
Rt Pcr ◽  
Geobacillus Thermodenitrificans ◽  
Reservoir Conditions ◽  
Important Intermediate ◽  
First Time

Anthranilate is an important intermediate of tryptophan metabolism. In this study, a hydroxylase system consisting of an FADH2-utilizing monooxygenase (GTNG_3160) and an FAD reductase (GTNG_3158), as well as a bifunctional riboflavin kinase/FMN adenylyltransferase (GTNG_3159), encoded in the anthranilate degradation gene cluster in Geobacillus thermodenitrificans NG80-2 were functionally characterized in vitro. GTNG_3159 produces FAD to be reduced by GTNG_3158 and the reduced FAD (FADH2) is utilized by GTNG_3160 to convert anthranilate to 3-hydroxyanthranilate (3-HAA), which is further degraded to acetyl-CoA through a meta-cleavage pathway also encoded in the gene cluster. Utilization of this pathway for the degradation of anthranilate and tryptophan by NG80-2 under physiological conditions was confirmed by real-time RT-PCR analysis of representative genes. This is believed to be the first time that the degradation pathway of anthranilate via 3-HAA has been characterized in a bacterium. This pathway is likely to play an important role in the survival of G. thermodenitrificans in the oil reservoir conditions from which strain NG80-2 was isolated.

Morphological Characterization of Mycobacteriophage R1

1974 ◽  
Vol 32 ◽  
pp. 254-255
Author(s):  
B. L. Soloff ◽  
T. A. Rado
Keyword(s):  
Carbon Source ◽  
Stationary Phase ◽  
Growth Phase ◽  
Minimal Medium ◽  
Morphological Characterization ◽  
Logarithmic Growth Phase ◽  
Complete Lysis ◽  
Lysogenic Culture ◽  
Logarithmic Growth

Mycobacteriophage R1 was originally isolated from a lysogenic culture of M. butyricum. The virus was propagated on a leucine-requiring derivative of M. smegmatis, 607 leu−, isolated by nitrosoguanidine mutagenesis of typestrain ATCC 607. Growth was accomplished in a minimal medium containing glycerol and glucose as carbon source and enriched by the addition of 80 μg/ ml L-leucine. Bacteria in early logarithmic growth phase were infected with virus at a multiplicity of 5, and incubated with aeration for 8 hours. The partially lysed suspension was diluted 1:10 in growth medium and incubated for a further 8 hours. This permitted stationary phase cells to re-enter logarithmic growth and resulted in complete lysis of the culture.

AEM analysis of crystallization in Ti-based amorphous alloys

1983 ◽  
Vol 41 ◽  
pp. 270-271
Author(s):  
A.R. Pelton ◽  
A.F. Marshall ◽  
Y.S. Lee
Keyword(s):  
Magnetic Properties ◽  
Amorphous Alloys ◽  
Amorphous Materials ◽  
Isothermal Annealing ◽  
Amorphous Matrix ◽  
Nucleation And Growth ◽  
Current Interest ◽  
Amorphous Films ◽  
Electrical And Magnetic Properties

Amorphous materials are of current interest due to their desirable mechanical, electrical and magnetic properties. Furthermore, crystallizing amorphous alloys provides an avenue for discerning sequential and competitive phases thus allowing access to otherwise inaccessible crystalline structures. Previous studies have shown the benefits of using AEM to determine crystal structures and compositions of partially crystallized alloys. The present paper will discuss the AEM characterization of crystallized Cu-Ti and Ni-Ti amorphous films.Cu60Ti40: The amorphous alloy Cu60Ti40, when continuously heated, forms a simple intermediate, macrocrystalline phase which then transforms to the ordered, equilibrium Cu3Ti2 phase. However, contrary to what one would expect from kinetic considerations, isothermal annealing below the isochronal crystallization temperature results in direct nucleation and growth of Cu3Ti2 from the amorphous matrix.

Characterization of Coherent, Ordered Precipitates in Nickel-Base Alloys

1973 ◽  
Vol 31 ◽  
pp. 144-145
Author(s):  
B. H. Kear ◽  
J. M. Oblak
Keyword(s):  
Stable Phase ◽  
Nickel Base Superalloy ◽  
Alloy 718 ◽  
Commercial Alloy ◽  
Precipitate Morphology ◽  
Continuous Precipitation ◽  
Nickel Base ◽  
Base Superalloy ◽  
Strengthening Precipitate

A nickel-base superalloy is essentially a Ni/Cr solid solution hardened by additions of Al (Ti, Nb, etc.) to precipitate a coherent, ordered phase. In most commercial alloy systems, e.g. B-1900, IN-100 and Mar-M200, the stable precipitate is Ni3 (Al,Ti) γ′, with an LI2structure. In A lloy 901 the normal precipitate is metastable Nis Ti3 γ′ ; the stable phase is a hexagonal Do2 4 structure. In Alloy 718 the strengthening precipitate is metastable γ″, which has a body-centered tetragonal D022 structure.Precipitate MorphologyIn most systems the ordered γ′ phase forms by a continuous precipitation re-action, which gives rise to a uniform intragranular dispersion of precipitate particles. For zero γ/γ′ misfit, the γ′ precipitates assume a spheroidal.

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