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Online since: January 2012
Authors: Hui Qing Liu, Yu Yuan Zhong
And in the shallow fracture, temperature changes rapidly, with a boiling inclusion group; Deep into the fracture in high temperature and pressure, changes slowly, there are no group inclusions boiling, and quantity, individual large inclusions in liquid water main.② compression fractures: fluid inclusions is small, generally less than 3 ~ 5μ, with alignment, and flattening features, higher homogenization temperature and salinity, often subject to deterioration, the main ingredient of CH4, with the deepening deterioration, in turn appear H2O and CO2 inclusions.③ ductile fracture: a small number of fluid inclusion homogenization temperature is high, the melt inclusions and CO2 inclusions is characterized as the temperature and pressure decreased, there CO2-H2O inclusions[8].
1.1.4 Determining the Formation Fault Age
By fracture fillings, cements the study of fluid inclusions can be formed to determine the age of the fault.
Such as the determination of fluid inclusions in quartz in the Rb-Sr, Sm-Nd, Ar-Ar isochron age, the measured values of surface age of the generation that is mainly mineral ages, interpreted as the fault of the active age [8,10]. 1.2 Hydrocarbon Evaluation 1.2.1 Organic Maturity Evaluation Along with the sediment buried depth increases, geothermal temperature, organic matter happens continuously pyrolysis, maturity by low to high transformation, and organic inclusions type, color, phase composition, composition, fluorescent color, size, number, refractive index are changing.
With the maturity of organic matter from low to high maturity evolution, organic inclusions type is in the main form of liquid hydrocarbon → liquid hydrocarbon+gaseous hydrocarbon → gaseous hydrocarbon ; Color is from colorless to yellow to brown to black; Phase composition is mainly by water oil gas and oil and oil and gas mainly of three phase water oil and gas and oil and gas two phase and three-phase gas phase (mainly CH4) for; Inclusion of composition CH4 / (CO2 + H2O) ratio increase gradually, alkane (CH4 + C2H6 + C3H8) and the content of total organic component ratio turned from small to big; Fluorescent color by light yellow and brown yellow, brown and blue gray-no fluorescence; Volume from small to large; By less than the number to; Form symmetric rules to shape by thick wall of irregular; Refractive index increase ever more [11]. 1.2.2 Organic Inclusions Types, Characteristics, Abundance Predict Prospect Areas of Hydrocarbon Liquid hydrocarbon inclusions in the oil and gas
Table 4.Source Rock and Reservoir Rocks Inclusions Contrast Table (According to the ShiJiXi, 1996) Type characteristic distribution size fluorescence composition carbon number range source rock Single with liquid hydrocarbon, gas to liquid hydrocarbon inclusions cemented thing, mainly authigenic mineral, increase the edge, solution pores fillings 3~8μ strong, yellow, orange, green mainly restructuring C32 ~C14 Reservoir rock complex with gas to liquid hydrocarbon, gaseous hydrocarbon inclusions late fillings, mainly authigenic mineral fissure 5 ~ 12 u strong ~ weak, with a blue Mainly light component C12~C22 1.3 Studying the Time of Gas Accumulation Collection of source rocks, fluid inclusions in reservoir rock samples to study the gas reservoir reservoirs.
c for the dimensionless parameter [18]. 1.4.4 Pore Fluid Density D = A + Bt + Ct2 Type, D for fluid density (g/cm3), t for uniform temperature (℃), A, B, and C for the dimensionless parameter, and the function: they salinity A = A0 + A1W + A2W2 B = B0 + B1W + B2W2 C = C0 + C1W + C2W2 Type, W (%) for salinity, A0=0.993531,A1=8.72147×10-3,A2=-2.43975×10-5 B0=7.11652×10-5,B1=-5.2208×10-5,B2=1.26656×10-6 C0=-3.4997×10-6,C1=2.12124×10-7,C2=-4.52318×10-9 1.4.5 Draw Fluid Density, and Predict the Favorable Zone of Hydrocarbon Accumulation The same layer segment (such as the top of each sample P) fluid potential numerical, projection to plan, rendering the fluid potential isoline map, low potential line confined area, which is the advantageous zone of hydrocarbon accumulation. 2 Conclusion The process of the fluid inclusion formed in hydrocarbon, often originates from the carbonate and elastic rocks in the calcite veins, quartz vein, quartz secondary increase edge, quartz grain
Such as the determination of fluid inclusions in quartz in the Rb-Sr, Sm-Nd, Ar-Ar isochron age, the measured values of surface age of the generation that is mainly mineral ages, interpreted as the fault of the active age [8,10]. 1.2 Hydrocarbon Evaluation 1.2.1 Organic Maturity Evaluation Along with the sediment buried depth increases, geothermal temperature, organic matter happens continuously pyrolysis, maturity by low to high transformation, and organic inclusions type, color, phase composition, composition, fluorescent color, size, number, refractive index are changing.
With the maturity of organic matter from low to high maturity evolution, organic inclusions type is in the main form of liquid hydrocarbon → liquid hydrocarbon+gaseous hydrocarbon → gaseous hydrocarbon ; Color is from colorless to yellow to brown to black; Phase composition is mainly by water oil gas and oil and oil and gas mainly of three phase water oil and gas and oil and gas two phase and three-phase gas phase (mainly CH4) for; Inclusion of composition CH4 / (CO2 + H2O) ratio increase gradually, alkane (CH4 + C2H6 + C3H8) and the content of total organic component ratio turned from small to big; Fluorescent color by light yellow and brown yellow, brown and blue gray-no fluorescence; Volume from small to large; By less than the number to; Form symmetric rules to shape by thick wall of irregular; Refractive index increase ever more [11]. 1.2.2 Organic Inclusions Types, Characteristics, Abundance Predict Prospect Areas of Hydrocarbon Liquid hydrocarbon inclusions in the oil and gas
Table 4.Source Rock and Reservoir Rocks Inclusions Contrast Table (According to the ShiJiXi, 1996) Type characteristic distribution size fluorescence composition carbon number range source rock Single with liquid hydrocarbon, gas to liquid hydrocarbon inclusions cemented thing, mainly authigenic mineral, increase the edge, solution pores fillings 3~8μ strong, yellow, orange, green mainly restructuring C32 ~C14 Reservoir rock complex with gas to liquid hydrocarbon, gaseous hydrocarbon inclusions late fillings, mainly authigenic mineral fissure 5 ~ 12 u strong ~ weak, with a blue Mainly light component C12~C22 1.3 Studying the Time of Gas Accumulation Collection of source rocks, fluid inclusions in reservoir rock samples to study the gas reservoir reservoirs.
c for the dimensionless parameter [18]. 1.4.4 Pore Fluid Density D = A + Bt + Ct2 Type, D for fluid density (g/cm3), t for uniform temperature (℃), A, B, and C for the dimensionless parameter, and the function: they salinity A = A0 + A1W + A2W2 B = B0 + B1W + B2W2 C = C0 + C1W + C2W2 Type, W (%) for salinity, A0=0.993531,A1=8.72147×10-3,A2=-2.43975×10-5 B0=7.11652×10-5,B1=-5.2208×10-5,B2=1.26656×10-6 C0=-3.4997×10-6,C1=2.12124×10-7,C2=-4.52318×10-9 1.4.5 Draw Fluid Density, and Predict the Favorable Zone of Hydrocarbon Accumulation The same layer segment (such as the top of each sample P) fluid potential numerical, projection to plan, rendering the fluid potential isoline map, low potential line confined area, which is the advantageous zone of hydrocarbon accumulation. 2 Conclusion The process of the fluid inclusion formed in hydrocarbon, often originates from the carbonate and elastic rocks in the calcite veins, quartz vein, quartz secondary increase edge, quartz grain
Online since: November 2013
Authors: Shu Hung Yeh, Liu Ho Chiu, Shou Chi Lin, Yeong Tsuen Pan
The prior austenite grain size given by austenitizing treatment was about ASTM No. 9.
The thermal fatigue properties including the damage factor (crack width × crack depth) and crack density (number of cracks per unit length) were revealed from a polished cross-section investigated using an optical microscope.
This indicates that the damage factor has a clear dependence on the number of cycles, as shown in Fig. 6 (a).
However, the crack density was not strongly dependent on the number of cycles (Fig. 6 (b)).
The damage factor has a clear dependence on the number of cycles.
The thermal fatigue properties including the damage factor (crack width × crack depth) and crack density (number of cracks per unit length) were revealed from a polished cross-section investigated using an optical microscope.
This indicates that the damage factor has a clear dependence on the number of cycles, as shown in Fig. 6 (a).
However, the crack density was not strongly dependent on the number of cycles (Fig. 6 (b)).
The damage factor has a clear dependence on the number of cycles.
Online since: September 2016
Authors: Jiří Kolisko, Milan Rydval, Stanislav Rehacek, David Citek
The number of cycles varied from 100 to 400 cycles.
Specimens were identically maintained as specimens from ordinary concrete C50/60 and were subjected to the same number of cycles.
Fine-grained structure of UHPC in the connection with excellent mechanical properties would resist on a long-term basis to extreme conditions represented undoubtedly by these freezing cycles.
The UHPC specimens UHPC showed even better resistance in pull-out tests after a high number of cycles.
A surface damage due to freezing and thawing cycles was observed at the specimens made from ordinary concrete while the specimens made from UHPC remained without any damage after high number of cycles.
Specimens were identically maintained as specimens from ordinary concrete C50/60 and were subjected to the same number of cycles.
Fine-grained structure of UHPC in the connection with excellent mechanical properties would resist on a long-term basis to extreme conditions represented undoubtedly by these freezing cycles.
The UHPC specimens UHPC showed even better resistance in pull-out tests after a high number of cycles.
A surface damage due to freezing and thawing cycles was observed at the specimens made from ordinary concrete while the specimens made from UHPC remained without any damage after high number of cycles.
Online since: May 2013
Authors: Shi Ming Zhang, Suo Jiong Xu, Xu Ji Yuan, Jun Xi Zhang, Tian Tian
Results show the grain size of FePO4 particles sintered at 460℃ and 380℃ for 3h ranges from 10nm to 20nm, and the crystal structure is amorphous.
The discharge capacities versus cycle number curves of FePO4 cathode material sintered at different temperatures(380℃, 460℃, 550℃, and 650℃) in the range of 2.0- 4.2V at 0.1Cand 0.3C are displayed in Fig.5 (b).
(b) Variation of discharge capacities versus cycle number of FePO4 samples sintered at different temperatures at 0.1C and 0.3C.
The discharge capacities versus cycle number curves of FePO4 cathode material sintered at different temperatures(380℃, 460℃, 550℃, and 650℃) in the range of 2.0- 4.2V at 0.1Cand 0.3C are displayed in Fig.5 (b).
(b) Variation of discharge capacities versus cycle number of FePO4 samples sintered at different temperatures at 0.1C and 0.3C.
Online since: June 2012
Authors: Hong Chao Deng
The samples contain the natural iron ore grain.
The sintered amorphous based material gains in strength from the natural iron ore grain for they are as the aggreate.
Table 1 Sintering conditions of sample adobes Sample number A B C D Glass powder content/% 10 15 22 25 Maximum sintering Temperature /˚C 1150 1080 1030 1000 Heating rate /˚C·min-1 170 170 170 170 Holding time of maximum temperature /min 45 45 45 45 Testing of the Sintered Samples Physical properties testing of the sintered samples.
Table 2 Physical properties of samples Sample number A B C D Marble Granite Density/g·cm-1 2.3 2.5 2.5 2.6 2.71 2.61 Compressive strength /MPa 41 88 94 50 98 120 Tensile strength /MPa 3 5 5 4 5 7 Bending strength /MPa 15 22 28 18 17 15 Hydroscopicity/% 0.04 0.01 0 0 0.03 0.23 Acid resistance /% 0 0 0 0 10.3 0.91 Alkali resistance /% 0 0 0 0 0.28 0.08 Radioactivity 0 0 0 0 - - The testing results indicate that the mechanical strength of the sintered material relate to the glass powder content of the sintered raw material.
The sintered amorphous based material gains in strength from the natural iron ore grain for they are as the aggreate.
Table 1 Sintering conditions of sample adobes Sample number A B C D Glass powder content/% 10 15 22 25 Maximum sintering Temperature /˚C 1150 1080 1030 1000 Heating rate /˚C·min-1 170 170 170 170 Holding time of maximum temperature /min 45 45 45 45 Testing of the Sintered Samples Physical properties testing of the sintered samples.
Table 2 Physical properties of samples Sample number A B C D Marble Granite Density/g·cm-1 2.3 2.5 2.5 2.6 2.71 2.61 Compressive strength /MPa 41 88 94 50 98 120 Tensile strength /MPa 3 5 5 4 5 7 Bending strength /MPa 15 22 28 18 17 15 Hydroscopicity/% 0.04 0.01 0 0 0.03 0.23 Acid resistance /% 0 0 0 0 10.3 0.91 Alkali resistance /% 0 0 0 0 0.28 0.08 Radioactivity 0 0 0 0 - - The testing results indicate that the mechanical strength of the sintered material relate to the glass powder content of the sintered raw material.
Online since: February 2013
Authors: K. Taibi, Lounis Azeddine, Naîma Ouazène
The diffusion resistance around the grains is significant and affects negatively the adsorption capacity.
By increasing the stirring speed, the rate of diffusion at the level of boundary layer (around the grains) becomes higher because of the improvement of the turbulence and the reduction thickness of boundary layer.
This phenomenon can be allotted to the fact that at the beginning of adsorption the number of available adsorption sites of the adsorbent materials is more significant than that of the remaining sites after a certain time.
The Elovich model equation is given by (9) Where is the initial sorption rate (mg.g-1 min-1) and is a constant (g.mg-1) relating to the number of available sites.
By increasing the stirring speed, the rate of diffusion at the level of boundary layer (around the grains) becomes higher because of the improvement of the turbulence and the reduction thickness of boundary layer.
This phenomenon can be allotted to the fact that at the beginning of adsorption the number of available adsorption sites of the adsorbent materials is more significant than that of the remaining sites after a certain time.
The Elovich model equation is given by (9) Where is the initial sorption rate (mg.g-1 min-1) and is a constant (g.mg-1) relating to the number of available sites.
Online since: April 2008
Authors: Markus J. Buehler, Dipanjan Sen
Studies of voids in
single metal crystals under shock loading have shown collapse of voids in the wave of the shock
and formation of nano-grains [3,4].
Studies of nanocrystals under shock loading have shown suppression of grain-boundary sliding mechanisms and improvement in hardness and flow strength of shocked samples [5,6].
The dislocation density is measured by finding number of core dislocation atoms in the simulation (possessing nearest neighbors between 10 and 13, leaving out perfectly coordinated atoms with 12 neighbors) and calculating length of dislocation line per unit volume of system.
Visualization of the dislocation structure is performed using coordination number coloring using Atomeye [20].
Studies of nanocrystals under shock loading have shown suppression of grain-boundary sliding mechanisms and improvement in hardness and flow strength of shocked samples [5,6].
The dislocation density is measured by finding number of core dislocation atoms in the simulation (possessing nearest neighbors between 10 and 13, leaving out perfectly coordinated atoms with 12 neighbors) and calculating length of dislocation line per unit volume of system.
Visualization of the dislocation structure is performed using coordination number coloring using Atomeye [20].
Online since: July 2017
Authors: Dmytro O. Bondarenko, Andrii A. Plugin, Tatyana O. Kostiuk, Oleksiy A. Plugin, Yulia A. Sukhanova, Natalia N. Partala
However, with all their well-known advantages, cement compositions have also a number of drawbacks; their tensile strength is one order less than their compressive strength; they show a tendency to shrinkage.
Increase in strength, crack resistance, impermeability of cement composites will ensure dispersed reinforcement and the maximum possible number of electro-heterogeneous contacts between the cement hydration products and fiber surface.
(In Russian) [21] Babushkin, V.I., Plugin,A.A., Kostyuk,T.A., Matvienko,V.A.Influence of surface active centers on the strength of fine-grained concrete,Scientific bulletin of civil engineering, Kharkiv,KhSTUBA, 1998,V.5, pp.85-88.
Manage strength fine-grained concrete after forming on the basis of the calculation electrosurface properties of its composition, Kharkіv: KhSTUBA, 1999, No7, pp.63-67.
Increase in strength, crack resistance, impermeability of cement composites will ensure dispersed reinforcement and the maximum possible number of electro-heterogeneous contacts between the cement hydration products and fiber surface.
(In Russian) [21] Babushkin, V.I., Plugin,A.A., Kostyuk,T.A., Matvienko,V.A.Influence of surface active centers on the strength of fine-grained concrete,Scientific bulletin of civil engineering, Kharkiv,KhSTUBA, 1998,V.5, pp.85-88.
Manage strength fine-grained concrete after forming on the basis of the calculation electrosurface properties of its composition, Kharkіv: KhSTUBA, 1999, No7, pp.63-67.
Online since: February 2024
Authors: Yuriy Nikitenko, Viktor Shapovalov, Volodymyr Yakusha, Oleksandr Gnizdylo, Olena M. Berdnikova
The density of the crucible material determines its stability (the number of heat changes).
This is because high-temperature grain boundary diffusion of defects in the crystal structure is inhibited in a single crystal.
The density of dislocations on micrographs was determined using the following dependence: ρ=Mtn1L1+n2L2 (1) where M is the magnification on a photomicrograph; t – foil thickness; n1, n2 - the number of intersections with horizontal and vertical lines, respectively; L1, L2 - the total length of horizontal and vertical lines.
The substructure has clear sub-boundaries with a homogeneous dislocation structure, without gradients in the density of dislocations, as well as their absence between the internal volume of grains and intergrain boundaries (Fig. 7b).
This is because high-temperature grain boundary diffusion of defects in the crystal structure is inhibited in a single crystal.
The density of dislocations on micrographs was determined using the following dependence: ρ=Mtn1L1+n2L2 (1) where M is the magnification on a photomicrograph; t – foil thickness; n1, n2 - the number of intersections with horizontal and vertical lines, respectively; L1, L2 - the total length of horizontal and vertical lines.
The substructure has clear sub-boundaries with a homogeneous dislocation structure, without gradients in the density of dislocations, as well as their absence between the internal volume of grains and intergrain boundaries (Fig. 7b).
Online since: August 2006
Authors: Y. Nishihata, Isao Tan, Hirohisa Tanaka, Jun'ichiro Mizuki, Mari Uenishi, Masashi Taniguchi
By the self-regenerative
function, the intelligent catalyst can suppress the
grain growth of the precious metals, even in a high
temperature exhaust gas, and it maintains high
activity for a long period of time (Figs. 2, 3)
[3].
K-edge Ageing treatment Shell (Bond) Weight (Wshell) Coordination number Interatomic distance (nm) Debye-Waller factor (x10 -4 nm 2) Discrepancy factor (%) 800-O Pd-O 1 6* 0.2038(5) 0.58(3) 3.9 Pd-Fe/Pd-Pd 0.44 6*/6* 0.2683(3) 0.64(4) 800-OR Pd-Pd 0.20 12* 0.2743(1) 0.64† 8.6 Pd 800-ORO Pd-O 1 6* 0.2038(5) 0.65(3) 8.9 Fig.5.
Since the sum of two shell-weights does not amount to 1, shortage of coordination number is considered to be the cause.
As the result, grain growth of precious metal is suppressed in a very small particle diameter.
K-edge Ageing treatment Shell (Bond) Weight (Wshell) Coordination number Interatomic distance (nm) Debye-Waller factor (x10 -4 nm 2) Discrepancy factor (%) 800-O Pd-O 1 6* 0.2038(5) 0.58(3) 3.9 Pd-Fe/Pd-Pd 0.44 6*/6* 0.2683(3) 0.64(4) 800-OR Pd-Pd 0.20 12* 0.2743(1) 0.64† 8.6 Pd 800-ORO Pd-O 1 6* 0.2038(5) 0.65(3) 8.9 Fig.5.
Since the sum of two shell-weights does not amount to 1, shortage of coordination number is considered to be the cause.
As the result, grain growth of precious metal is suppressed in a very small particle diameter.