Surface‐to‐volume ratio, charge density, nuclear magnetic relaxation, and permeability in clay‐bearing sandstones

Geophysics ◽  
1990 ◽  
Vol 55 (1) ◽  
pp. 61-69 ◽  
Author(s):  
P. N. Sen ◽  
C. Straley ◽  
W. E. Kenyon ◽  
M. S. Whittingham
Keyword(s):  
Magnetic Relaxation ◽  
Decay Constant ◽  
Regression Coefficient ◽  
Volume Ratio ◽  
Oil Fields ◽  
Size Parameter ◽  
Exchange Cation ◽  
The World ◽  
Log Interpretation ◽  
Water Saturated

Based on measurements on some 100 sandstone core samples, mainly from oil fields from various parts of the world, we found the following regressions between volume‐to‐surface ratio [Formula: see text], permeability to fluid flow k, exchange cation molarity [Formula: see text], and proton NMR decay constant [Formula: see text] in water‐saturated rocks (see Figure 1): [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text]. Here R is the regression coefficient, ϕ is the porosity and m the conductivity exponent; [Formula: see text] in normality (meq/ml), k in millidarcies, and [Formula: see text] in milliseconds, [Formula: see text] in μm. Including the tortuosity factor [Formula: see text] in conjunction with a pore‐size parameter as represented by [Formula: see text], [Formula: see text], or [Formula: see text] improves the correlation with permeability and reduces the residual error. The best predictor for log k is log [Formula: see text]. The exponents in the above correlations agree reasonably with those expected from simple models. These correlations provide a numerical basis for assessing how well some of these quantities can be estimated from others in log interpretation. They also provide a basis for assessing the importance of the factors that interfere with and thereby weaken the correlations.

Income or Culture? Examining the Determinants of Subjective Wellbeing in an International Sample

2019 ◽  
Author(s):  
Siddharth Garg
Keyword(s):  
Online Survey ◽  
Subjective Wellbeing ◽  
Regression Coefficient ◽  
Marginal Utility ◽  
Economic Class ◽  
Income Groups ◽  
Significant Difference ◽  
The World ◽  
Diminishing Marginal Utility ◽  
The Relationship

Objective: The aim of this paper was to examine the relationship between income, subjective wellbeing, and culture among people from a higher socio-economic class across the world. Rationale: Ed Diener proposed the law of diminishing marginal utility as an explanation for differences in subjective wellbeing among different income groups across different countries (Diener, Ng, & Tov, Balance in life and declining marginal utility of diverse resources, 2009). Thus, people with higher incomes would experience less subjective wellbeing due to income, and culture should emerge as a significant predictor. Method: Data from this study came from another study (https://siddharthgargblog.wordpress.com/2019/07/14/love-for-money/). I used an online survey to collect data on annual income in US dollars, subjective wellbeing (WHO-5), and country of residence (Indicator of Culture). 96 responses (Indians = 24, Foreigners = 72) were entered in IBM SPSS and a regression analysis was conducted. The raw dataset used in this study can be found at https://doi.org/10.6084/m9.figshare.8869040.v1Results: ANOVA showed a significant difference (p < 0.05) between Indians and foreigners on levels of subjective wellbeing. Linear regression shows the regression coefficient of culture to be significant (Beta = -.254, p = .014) but the regression coefficient of income was not found to be significant. The overall model was found to explain 8.2% of the variance in wellbeing.Conclusion: The sample of this study is too small to make any kind of generalization; it does lend a little bit of support to the idea of diminishing marginal utility of income on subjective wellbeing and provides a rationale for further research.

scholarly journals Study of marl stabilization with organic binders

Vestnik MGSU ◽  
2020 ◽  
pp. 58-71
Author(s):  
Egor I. Korolev ◽  
Evgeniya N. Sychkina ◽  
Andrey B. Ponomaryov
Keyword(s):  
Uniaxial Compression ◽  
Binder Content ◽  
Oil Fields ◽  
Strength Parameter ◽  
Plastic State ◽  
Uniaxial Compression Strength ◽  
Plastic Properties ◽  
Strength Tests ◽  
Dry Conditions ◽  
Water Saturated

Introduction. The paper considers marl used as the primary material for road embankments and multiple-well platforms at some oil fields of the Perm’ Territory. This ground has different strength parameters in dry and water-saturated conditions. Rather high values of the resistance to uniaxial compression in dry conditions abruptly fall when contacting atmospheric or ground water. Being damped and destroyed, marl is capable of transiting into the plastic state with abrupt reduction of strength and growth of deformability. Materials and methods. The optimal binder was selected. Strength tests were performed on samples made based on of various binder contents and hardening periods. The considered strength parameter is the ultimate uniaxial compression strength. A part of the laboratory tests was carried out with artificial marl, which was recreated by granulometric composition to expand the statistical data of the tests. Laboratory studies for non-stabilized marl were conducted to determine the optimal humidity, density of ground particles, yield limit, and plastic limit. The hardening of the samples occurred under different temperature conditions. Results. The study of both stabilized and non-stabilized ground samples is mainly focused on strength indicators, changes in plastic properties, compaction requirements, correlation of strength, and compressibility characteristics of the marl samples. There is a decrease in density and humidity, with an increase in the amount of binder in the sample. Significant improvement and stabilization of the studied samples were observed for 4-% binder content. Conclusions. The study proved many increases in the strength of marl during its stabilization. The optimal type of binder was proposed. Dependences of the strength of ground samples on the binder content were shown

GEOPHYSICAL OPERATIONS IN KUWAIT

Geophysics ◽  
1946 ◽  
Vol 11 (2) ◽  
pp. 164-177 ◽  
Author(s):  
P. H. Boots ◽  
Alexander H. McKee
Keyword(s):  
Oil Fields ◽  
Seismic Methods ◽  
The World ◽  
General Conditions

This paper describes the general operations of the combined geophysical party, using gravity, magnetic and seismic methods, which made a survey of Kuwait in one working season. The organization of the party, the general conditions met, and the manner in which the operations were adapted to the country and its people are described. The geophysical results themselves are not included, but it may be remarked that the surveys described led to the discovery of one of the great oil fields of the world.

Years of Arabian Peninsula gravity exploration by Chevron and its legacy companies, including discovery of the Ghawar and Burgan super-giants

2020 ◽  
Vol 39 (4) ◽  
pp. 279-283
Author(s):  
Robert Pawlowski
Keyword(s):  
Saudi Arabia ◽  
Arabian Peninsula ◽  
Oil Fields ◽  
The World ◽  
Standard Oil Company ◽  
Deep Exploration ◽  
Oil Company ◽  
Arabian Platform ◽  
Ghawar Field

Exploration of the eastern Arabian Platform in the 1930s and 1940s by Chevron and its legacy company Gulf Oil resulted in discovery of Kuwait's super-giant Burgan Field by Gulf Oil in 1938 and Saudi Arabia's super-giant Ghawar Field by California Arabian Standard Oil Company in 1948. Ghawar Field and Burgan Field are widely regarded as the first- and second-largest oil fields in the world, respectively. Gravity methods featured prominently in Gulf's and Chevron's subsurface explorations. Gravity mapping identified the Burgan structure and was important in delineating the Ghawar structural complex. Gravimetric technology continues to provide value for deep exploration in Chevron's Partitioned Zone concession in Saudi Arabia and Kuwait.

scholarly journals AGE DISTRIBUTION OF WRESTLERS PARTICIPATING IN THE WORLD CHAMPIONSHIPS

2021 ◽  
pp. 138-143
Author(s):  
Mykola Latyshev ◽  
Victor Shandrygos ◽  
Yrui Tropin ◽  
Olena Polianychko ◽  
Alfiia Deineko ◽  
...  
Keyword(s):  
Linear Regression ◽  
Regression Coefficient ◽  
Age Distribution ◽  
Competitive Performance ◽  
Linear Regression Coefficient ◽  
Weight Group ◽  
The World ◽  
And Gender

The age of peak competitive performance is particularly important as the entire sports career in each sport is planned on its basis. Depending on the sport and gender of the athlete, the age of peak competitive performance varies considerably. The objective of the study - to determine the age indicators of the wrestlers who participated in the World Championships, depending on the place taken and the weight group. We have studied 332 sports careers of the freestyle and Greko-Roman male wrestlers from 1st to 8th ranks who participated in the World Championships 2017, 2018 and 2019. The following indicators are analyzed: the average age, the average age of the international career start, the average age of first success and the proportion of athletes who achieved success at junior level. Results. The average age of the wrestlers is 26.5 ± 3.6 years: the medalists are slightly younger – 26.3 ± 3.4 years, and non-medalists are older than 26.7 ± 3.8 years. The analysis of the distribution of the age of peak competitive performance of athletes-medalists has shown the following results: there are 67.7 % of medalist among the athletes who are 22-28 years old, 11.8% among those who are younger than 23 years old and only 26.6% among those who are older than 28 years. More than half (53.4%) of medalists achieved success being juniors, while for non-medalists this proportion is only 38.2%. The linear regression coefficient between the age and the weight of athletes is positive and is equal to 0.47 kg per year. The results obtained on the medalists show that the period for achieving the peak competitive performance is limited and quite a few athletes can succeed beyond a certain period of age.

BIOTECHNOLOGIES AND BIOPREPARATIONS FOR CLEANING THE ENVIRONMENT FROM OIL POLLUTIONS IN TEMPERATE AND COLD CLIMATES

2020 ◽  
pp. 328-330
Author(s):  
I. Puntus ◽  
L. Akhmetov ◽  
A. Vetrova ◽  
S. Linnikov ◽  
A. Boronin
Keyword(s):  
Low Temperatures ◽  
Oil Pollution ◽  
Oil Fields ◽  
Cold Climates ◽  
The World ◽  
Northern Regions ◽  
Temperate Climates

In Russia, most oil fields and oil-contaminated territories are located in northern regions. Phyto- and bioremediation studies are carried out in many countries of the world, however, the effectiveness of bioremediation at low temperatures has so far been little studied, and the problem of cleaning the environment from oil pollution has not yet been solved. Therefore, the development of effective biopreparations and technologies for cold and temperate climates is especially relevant.

scholarly journals Zero to moderate methane emissions in a densely rooted, pristine Patagonian bog - biogeochemical controls as revealed from isotopic evidence

2018 ◽  
Author(s):  
Wiebke Münchberger ◽  
Klaus-Holger Knorr ◽  
Christian Blodau ◽  
Verónica A. Pancotto ◽  
Till Kleinebecker
Keyword(s):  
Vascular Plants ◽  
Biogeochemical Processes ◽  
Oxygen Release ◽  
Ch4 Oxidation ◽  
Isotopic Signatures ◽  
Carbon Isotopic ◽  
The World ◽  
Northern Hemispheric ◽  
Water Saturated ◽  
Chamber Measurements

Abstract. Peatlands are significant global methane (CH4) sources, but processes governing CH4 dynamics have been predominantly studied on the northern hemisphere. Southern hemispheric and tropical bogs can be dominated by cushion-forming vascular plants (e.g. Astelia pumila, Donatia fascicularis). These cushion bogs are found in many (mostly southern) parts of the world but could also serve as extreme examples for densely rooted northern hemispheric bogs dominated by rushes and sedges. We report highly variable summer CH4 emissions from different microforms in a Patagonian cushion bog as determined by chamber measurements. Driving biogeochemical processes were identified from pore water profiles and carbon isotopic signatures. An intensive root activity within a rhizosphere stretching over 2 m depth accompanied by molecular oxygen release created aerobic microsites in water-saturated peat leading to a thorough CH4 oxidation (

scholarly journals Opportunities for New Competition

1972 ◽  
Vol 1 (01) ◽  
pp. 287-293
Author(s):  
William J. Toleman
Keyword(s):  
Economic Theory ◽  
Common Sense ◽  
Manufacturing Industries ◽  
Oil Fields ◽  
The World

We see our large manufacturing industries getting bigger and bigger and our economic theory getting weaker and weaker. When a corporation controls more wealth than most countries in the world, it makes us uncomfortable. When some companies are large enough to spend millions of dollars exploring the Alaskan oil fields, while other companies struggle to maintain their business, inequalities, imagined or real, are present, which go against our “common-sense nature.”

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