Correlations among Thermal Conductivity, Porosity, and Permeability of Mesozoic Sandstones and Siltstones from the Southern Regions of the West Siberian Plate

2021 ◽  
Author(s):  
A.D. Duchkov ◽  
D.E. Ayunov ◽  
L.S. Sokolova ◽  
P.A. Yan
Keyword(s):  
Thermal Conductivity ◽  
Rapid Assessment ◽  
The West ◽  
The Core ◽  
Approximate Estimation ◽  
Porosity And Permeability ◽  
Water Saturated ◽  
The Relationship ◽  
Khanty Mansi Autonomous ◽  
Measured Thermal Conductivity

Abstract —We consider results of measurements of thermal conductivity, porosity, and permeability for 780 samples of Mesozoic sandstones and siltstones from the cores of 50 wells drilled in three southern regions of the West Siberian Plate (Novosibirsk and Tomsk regions, Surgut region of the Khanty-Mansi Autonomous Area). The thermal conductivity of the samples was measured twice: in dry and in water-saturated states. It has been established that the thermal conductivity of water-saturated rocks is on average 20–40% higher. The thermal conductivities of dry and water-saturated samples show stable correlations between each other and with the sample porosity and permeability. These correlations can be used for the approximate estimation of the thermal conductivity of water-saturated rocks from the measured thermal conductivity of dry samples or even from the porosity values. The relationship between thermal conductivity and porosity can be used for the rapid assessment of rock porosity from the measured thermal conductivity of the core.

Research on the Distriution Rules and Calculation Method of the Parameters of Reservoir of Putaohua Groups in Yushulin Oil Field

2014 ◽  
Vol 490-491 ◽  
pp. 468-472
Author(s):  
Ke Zeng ◽  
Zheng Zhou ◽  
Mei Ling Zhang
Keyword(s):  
Physical Property ◽  
Analysis Data ◽  
Well Logging ◽  
Oil Field ◽  
Core Analysis ◽  
The Core ◽  
Reservoir Property ◽  
Porosity And Permeability ◽  
The Relationship ◽  
Parameters Calculation

Based on the Putaohua groups in Yushulin oil field, and through the statiscics and analyses, weve found that the reservoir property of this area is in the range of specially low permeability level. So due to the low porosity and permeability, its necessary to do some reaearch on the parameters calculation method.This papers analysed the relationships between the physical property parameters such as porosity, permeability, shale content and the well logging responses such as AC, SP, GR, then we built the distribution rules histograms of each physical property parameter. And we got the distribution situations of the parameters of the oil groups. Through the multiple regression, we built the relationship formulas between the reservoir property parameters and the well logging responses by using the core analysis data of 53 test wells. Afetr comparing the parameters of calculation and the core analysis data, we found that the deviation is small, which meets the production requires of oil field.

scholarly journals New Delhi's Pakistan Dilemma and the Indo-Pakistan Peace Process

2021 ◽  
Vol VI (I) ◽  
pp. 17-26
Author(s):  
Rizwan Zeb ◽  
Shahbaz Ahmed Shahzad ◽  
Muhammad Alam
Keyword(s):  
Peace Process ◽  
New Delhi ◽  
The West ◽  
The Core ◽  
The Relationship

Although many argue that since Modi took over, Indo-Pak peace became a mirage yet, this paired minority conflict started in 1947. At present, any discussion in the west on India-Pakistan relations implicates Pakistan for all the wrongs with the relationship. What is missing from this narrative is the lack of a clear Indian position and policy towards Pakistan. What is New Delhi's Pakistan policy? How New Delhi intends to address its Pakistan problem? The core argument of this paper is that the biggest hurdle to establishing India-Pakistan peace or normalization is a lack of a clearly stipulated Pakistan policy on the part of New Delhi and that it has no vision for how to deal with Pakistan other than as an enemy.

scholarly journals Origins of Twinned Microstructures in B12As2 Epilayers Grown on (0001) 6H-SiC and Their Influence on Physical Properties

2009 ◽  
Vol 1164 ◽  
Author(s):  
Yu Zhang ◽  
Hui Chen ◽  
Ning Zhang ◽  
Michael Dudley ◽  
Yinyan Gong ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Vapor Deposition ◽  
Defect Structure ◽  
Chemical Vapor ◽  
X Ray ◽  
Transmission Electron ◽  
Different Temperatures ◽  
The Difference ◽  
The Relationship ◽  
Measured Thermal Conductivity

AbstractThe defect structure in B12As2 epitaxial layers grown at two different temperatures on (0001) 6H-SiC by chemical vapor deposition (CVD) was studied using synchrotron white beam x-ray topography (SWBXT) and high resolution transmission electron microscopy (HRTEM). The observed differences in microstructures were correlated with the differences in nucleation at the two growth temperatures. The effect of the difference in microstructure on macroscopic properties of the B12As2 was illustrated using the example of thermal conductivity which was measured using the 3-ω technique. The relationship between the measured thermal conductivity and observed microstructures is discussed.

XXV.—The Mineralogy and Metamorphism of the Moine Schists of the Morar and Knoydart Districts of Inverness-shire

1959 ◽  
Vol 63 (3) ◽  
pp. 553-588 ◽  
Author(s):  
R. St J. Lambert
Keyword(s):  
Regional Metamorphism ◽  
Metamorphic Grade ◽  
Effect Of Temperature ◽  
Time Interval ◽  
The West ◽  
Extreme Caution ◽  
The Core ◽  
Garnet Zone ◽  
Relationship Of ◽  
The Relationship

SynopsisThis study of the mineralogy and metamorphism of the Moine schists approaches the problem through consideration of the chemical composition of the minerals. The principal minerals of the Moine schists are studied individually, thirty-three new analyses of minerals being given, with four of schists. For all but six analyses the trace elements have been determined and are tabulated. Muscovites, biotites and garnets all show variation of composition with increasing metamorphic grade, respectively with decreasing Fe2O3 and SiO2, increasing MgO and Al2O3, and decreasing CaO plus increasing MgO, these being only the principal variations. The crystal chemistry of the muscovites, biotites and garnets is briefly discussed. Some new data are presented for the relationship of plagioclase and epidote, a relationship which can only be used with extreme caution to indicate metamorphic grade. A dependence of the incidence of a sutured quartz aggregate in psammitic schists upon the microcline content is noted, and it is suggested that the incidence of the breakdown of quartz under the combined effect of temperature (the dominant cause), stress and potassio solutions, all active in the core, is responsible for the production of the core-envelope boundary. This boundary transgresses the strike; within it retrogressive changes have converted Garnet-zone schists to Biotite-zone schists, but outside it the only retrogressive change is garnet to chlorite. The retrogressive metamorphism formed a distinct episode separated from the initial regional metamorphism by an unknown time-interval; during the second metamorphism isotherms were concentric with the dome, declining outwards. The evidence of an epidiorite from the west coast of Morar suggests that during the first metamorphism the zonal state there was that of the Dalradian Biotite-zone; “almandine” garnets in the adjacent schists are extremely rich in CaO and are in equilibrium with microcline.

scholarly journals A Newly Discovered Mycobacterial Pathogen Isolated from Laboratory Colonies of Xenopus Species with Lethal Infections Produces a Novel Form of Mycolactone, the Mycobacterium ulcerans Macrolide Toxin

2005 ◽  
Vol 73 (6) ◽  
pp. 3307-3312 ◽  
Author(s):  
Armand Mve-Obiang ◽  
Richard E. Lee ◽  
Edward S. Umstot ◽  
Kristin A. Trott ◽  
Timothy C. Grammer ◽  
...  
Keyword(s):  
Buruli Ulcer ◽  
West African ◽  
Mycobacterium Ulcerans ◽  
Side Chain ◽  
Hydroxyl Groups ◽  
The West ◽  
P450 Monooxygenase ◽  
The Core ◽  
Laboratory Colonies ◽  
The Relationship

ABSTRACT Mycobacterium ulcerans, the causative agent of Buruli ulcer, produces a macrolide toxin, mycolactone A/B, which is thought to play a major role in virulence. A disease similar to Buruli ulcer recently appeared in United States frog colonies following importation of the West African frog, Xenopus tropicalis. The taxonomic position of the frog pathogen has not been fully elucidated, but this organism, tentatively designated Mycobacterium liflandii, is closely related to M. ulcerans and Mycobacterium marinum, and as further evidence is gathered, it will most likely be considered a subspecies of one of these species. In this paper we show that M. liflandii produces a novel plasmid-encoded mycolactone, mycolactone E. M. liflandii contains all of the genes in the mycolactone cluster with the exception of that encoding CYP140A2, a putative p450 monooxygenase. Although the core lactone structure is conserved in mycolactone E, the fatty acid side chain differs from that of mycolactone A/B in the number of hydroxyl groups and double bonds. The cytopathic phenotype of mycolactone E is identical to that of mycolactone A/B, although it is less potent. To further characterize the relationship between M. liflandii and M. ulcerans, strains were analyzed for the presence of the RD1 region genes, esxA (ESAT-6) and esxB (CFP-10). The M. ulcerans genome strain has a deletion in RD1 and lacks these genes. The results of these studies show that M. liflandii contains both esxA and esxB.

EXPLORATION FOR OIL-BEARING SAND TRENDS IN THE FLY RIVER AREA, WESTERN PAPUA

1972 ◽  
Vol 12 (1) ◽  
pp. 69 ◽  
Author(s):  
C.E.B. Conybeare ◽  
R.G.C. Jessop
Keyword(s):  
Seismic Data ◽  
Lower Cretaceous ◽  
Salt Water ◽  
Depth Range ◽  
Porosity And Permeability ◽  
Water Saturated ◽  
Fly River ◽  
The Relationship ◽  
Oil Company

The Magobu Island No. 1 well, drilled by Endeavour Oil Company N.L. late in 1970, was located to test a large, northwest-trending, Mesozoic anticline at the mouth of the Fly River, Western Papua. The anticlinal trend was postulated to be coincident with an intra-Mesozoic strand line where massive lenticular sand bodies may have developed.The well penetrated 3,086 ft. of Pliocene and Miocene carbonates and 5,360 ft. of Lower Cretaceous and Jurassic elastics before bottoming in Carboniferous volcanics.Two massive sandstone units of particular significance, one of Lower Cretaceous age at a depth range of 4,265-4,775 ft., and the other of Middle Jurassic age at a depth range of 7,065-7,345 ft. were intersected. These clean, quartzose sandstones have excellent porosity and permeability but are salt-water saturated at the Magobu location.The electric log character, grain gradation, continuous dipmeter information, and depositional environment (determined by interpreting the lithologic sequence and faunal content of the Mesozoic) indicate that these sandstone units consist of northwest-trending barrier bar complexes. The basal member of the upper unit, in particular, is interpreted as having formed a barrier island.The seismic data support this interpretation with respect to both sandstone units. In addition, a second and thicker bar complex of similar trend, situated some 10 mi. down-dip to the northeast under Kiwai Island, is indicated by the seismic data and can be correlated with the upper sandstone unit at Magobu.Structural interpretations of the relationship between the upper barrier bar complexes at Magobu and Kiwai suggest that oil migrating up-dip would be trapped by the structurally lower bar build-up. This conclusion gives a lead to follow-up drilling in the search for oil-bearing sand trends.

Control of Grading Structure and Thermal Conductivity of Wood by Compressing Process

2005 ◽  
Vol 492-493 ◽  
pp. 281-286
Author(s):  
Yoshihiro Obata ◽  
Kazutoshi Takeuchi ◽  
Kouichi Akaeda ◽  
Kozo Kanayama
Keyword(s):  
Thermal Conductivity ◽  
Effective Thermal Conductivity ◽  
Power Function ◽  
Annual Ring ◽  
Average Density ◽  
Natural Wood ◽  
Compressed Wood ◽  
The Relationship ◽  
Measured Thermal Conductivity

Compressed wood has different grading structure in an annual ring from one of natural wood. This paper treats the relationship between grading structures and effective thermal conductivity of natural and compressed woods. The Lorentz function and the power function are assumed as grading patterns of thermal conductivity. The grading thermal conductivity shows smaller effective thermal conductivity than the homogeneous wood with same average density. The sharper grading pattern gives much smaller effective thermal conductivity. The grading pattern of compressed wood is assumed as a model with locally compressed region. The calculated effective thermal conductivity by the model agrees with the measured thermal conductivity.

Contemporary Qur'anic Studies in Iran and its Relationship with Qur'anic Studies in the West

2012 ◽  
Vol 14 (1) ◽  
pp. 45-72
Author(s):  
Morteza Karimi-Nia
Keyword(s):  
Islamic Law ◽  
Human Sciences ◽  
The West ◽  
Communications Technologies ◽  
Religious Learning ◽  
The Status ◽  
Islamic Republic Of Iran ◽  
Almost All ◽  
The Impact ◽  
The Relationship

The status of tafsīr and Qur'anic studies in the Islamic Republic of Iran has changed significantly during recent decades. The essay provides an overview of the state of Qur'anic studies in Iran today, aiming to examine the extent of the impact of studies by Western scholars on Iranian academic circles during the last three decades and the relationship between them. As in most Islamic countries, the major bulk of academic activity in Iran in this field used to be undertaken by the traditional ʿulamāʾ; however, since the beginning of the twentieth century and the establishment of universities and other academic institutions in the Islamic world, there has been increasing diversity and development. After the Islamic Revolution, many gradual changes in the structure and approach of centres of religious learning and universities have occurred. Contemporary advancements in modern sciences and communications technologies have gradually brought the institutions engaged in the study of human sciences to confront the new context. As a result, the traditional Shīʿī centres of learning, which until 50 years ago devoted themselves exclusively to the study of Islamic law and jurisprudence, today pay attention to the teaching of foreign languages, Qur'anic sciences and exegesis, including Western studies about the Qur'an, to a certain extent, and recognise the importance of almost all of the human sciences of the West.

An Experimental Investigation on Thermal Conductivity and Viscosity of Graphene doped CNTs /TiO2 Nanofluid

2020 ◽  
Vol 17 (3) ◽  
Author(s):  
A.M. Zetty Akhtar ◽  
M.M. Rahman ◽  
K. Kadirgama ◽  
M.A. Maleque
Keyword(s):  
Thermal Conductivity ◽  
Zeta Potential ◽  
Base Fluid ◽  
Minimum Quantity Lubrication ◽  
Cutting Fluid ◽  
Cutting Zone ◽  
Observation Method ◽  
The Stability ◽  
The Relationship ◽  
Zeta Potential Analysis

This paper presents the findings of the stability, thermal conductivity and viscosity of CNTs (doped with 10 wt% graphene)- TiO2 hybrid nanofluids under various concentrations. While the usage of cutting fluid in machining operation is necessary for removing the heat generated at the cutting zone, the excessive use of it could lead to environmental and health issue to the operators. Therefore, the minimum quantity lubrication (MQL) to replace the conventional flooding was introduced. The MQL method minimises the usage of cutting fluid as a step to achieve a cleaner environment and sustainable machining. However, the low thermal conductivity of the base fluid in the MQL system caused the insufficient removal of heat generated in the cutting zone. Addition of nanoparticles to the base fluid was then introduced to enhance the performance of cutting fluids. The ethylene glycol used as the base fluid, titanium dioxide (TiO2) and carbon nanotubes (CNTs) nanoparticle mixed to produce nanofluids with concentrations of 0.02 to 0.1 wt.% with an interval of 0.02 wt%. The mixing ratio of TiO2: CNTs was 90:10 and ratio of SDBS (surfactant): CNTs was 10:1. The stability of nanofluid checked using observation method and zeta potential analysis. The thermal conductivity and viscosity of suspension were measured at a temperature range between 30˚C to 70˚C (with increment of 10˚C) to determine the relationship between concentration and temperature on nanofluid’s thermal physical properties. Based on the results obtained, zeta potential value for nanofluid range from -50 to -70 mV indicates a good stability of the suspension. Thermal conductivity of nanofluid increases as an increase of temperature and enhancement ratio is within the range of 1.51 to 4.53 compared to the base fluid. Meanwhile, the viscosity of nanofluid shows decrements with an increase of the temperature remarks significant advantage in pumping power. The developed nanofluid in this study found to be stable with enhanced thermal conductivity and decrease in viscosity, which at once make it possible to be use as nanolubricant in machining operation.

JOHN LOUIS ESPOSITO TENTANG DIALOG PERADABAN ISLAM-BARAT

1970 ◽  
Vol 7 (1) ◽  
Author(s):  
Moh. Salman Hamdani
Keyword(s):  
Common Ground ◽  
Entry Point ◽  
The West ◽  
Strong Bond ◽  
Historical Fact ◽  
Muslim Intellectuals ◽  
Abrahamic Religions ◽  
Cultural Dialogue ◽  
The Relationship

This paper aims to provide explanation about John Louis Esposito’s insights on therelationship between Islam and The West. The relationship is a fluctuative one, some tensionsand even open conflict may occur. Some events become the entry point to the relationship, forinstance, the crusades that is not only happened physically but also, through this war, the meetingbetween Islam and The West establishes inter cultural dialogue among them.John Louis Esposito’s views on the relationship between Islam and The West ispositioned in view of some Muslim intellectuals and orientalists to emphasize its originality. Theintellectual positions do not put it on pros or cons side in the context of the relationship betweenIslam and The West.Historically, the relationship between Islam and The West actually has a theologicallystrong bond that there is common ground and similarities between Islam and The West. Islamand The west are inherited with Jewish and Christian traditions. Islam like Christianity andJudaism are religions ‘of the sky’ that are allied in Abrahamic religions. Therefore, according toJohn L. Esposito, based on historical fact, there were a real strong bond between Islam and theWest and it started centuries ago .

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