scholarly journals A Synoptic Review of Mineralogical and Chemical Characteristics of Clays in the Southern Part of Nigeria

2021 ◽  
Vol 3 (2) ◽  
Author(s):  
Moses Oghenenyoreme Eyankware ◽  
Christopher Ogwah ◽  
Joy Chiaka Ike

This paper reviews the mineralogical and chemical characteristics of clays found in southern part of Nigeria, with a view to determine its usability. The usability of clays, depends on its chemical and mineralogical charactertics, the end product of clay after it is been processed is also based on it’s charactertics. From reviewed literature, it was observed that sampled clay within the study area were analyzed using the XRD, XRF and ICPMS method. Further findings also revealed that the dominant clay minerals within the study area include montmorillonite, illite, and kaolinite. On the other hand, it was observed that non-clay minerals such as feldspar, quartz, dickite and many others were found with clay as revealed by several scholars. While chemical charactertics of clay consists mainly of Al2O3, K2O, CaO and SiO2, with other major oxides such as P2O5, MgO, Fe2O3, TiO2, MnO and Na2O. Some trace elements such Be, Ba, Sc, Sr, Zr, V and Y were reported to be present in clays deposit found in selected part of Ogun state. From reviewed articles, it was observed that mineralogical and chemical charactertics of clay make it suitable for pharmaceutical, textile, cosmetic and polymer industries, but considered to be fairly suitable for oil and gas industry.

2012 ◽  
Vol 1 (2) ◽  
pp. 43-50
Author(s):  
Violet C. Rogers ◽  
Jack R. Ethridge ◽  
Treba A. Marsh ◽  
Jessica Lott

This study investigates the similarities of ethical and environmental disclosures, as well as risk factors contained within annual reports for the reporting year 2009. The data were collected from Fortune 500 oil and gas company annual reports. Findings include: 1) an emphasis on environmental, financial, nonfinancial and ethical disclosures and 2) similar reported risks for all companies investigated. The findings illustrate that many of the studied oil and gas companies have similar disclosures but, on the other hand, are situation specific to particular company and location.


1970 ◽  
Vol 8 (2) ◽  
pp. 233 ◽  
Author(s):  
D. A. MacWilliam

A party to a joint venture agreement in the oil and gas industry is often faced with the problem of determining whether or not he owes a fiduciary duty to his joint venturer. This article examines the many factual situations in oil and gas joint ventures which, could give rise to a fiduciary duty and concludes that the extent to which the fiduciary principle is applicable to various relationships involving interests in oil and gas has not yet been determined by the courts. As such, the author suggests that in addition to attempting to provide in the agreement for those circumstances which could give rise to a fiduciary duty, a party to a joint venture who desires to avoid a breach of a fiduciary duty should make full disclosure to and attempt to get the consent of the other contracting party.


2015 ◽  
Vol 15 (1) ◽  
pp. 37-55 ◽  
Author(s):  
B. Karpiński ◽  
M. Szkodo

Abstract Among the minerals found in the earth's crust, clay minerals are of the widest interest. Due to the specific properties such as plasticity, absorbing and catalytic properties clay minerals are used in many industries (oil & gas, chemistry, pharmacy, refractory technology, ceramics etc.). In drilling, a phenomenon of swelling clays is frequently observed. It has an important impact on the cementing quality. During the last few decades clays have been the subject of research on a scale unprecedented in the history of mineralogy. This paper presents review literature on mineralogy of clay minerals and phenomenon of swelling in oil and gas industry. Unique ion exchange properties and clay swelling mechanisms are also considered.


2018 ◽  
Vol 9 (1) ◽  
pp. 64
Author(s):  
Venny Junica Utami

The research object of the research is Oil and Gas Industry and obsrvation object from 2012 -2016 where the sample consist of 4 companies namely PT. Ratu Prabu Energi Tbk, PT. Elnusa Tbk, PT. Surya Esa Perkasa Tbk, and PT. Radiant Utama Interinsco Tbk. Based on result of research assisted by software SPSS 20 generated regression equation Y = - 2,296 x 10-11 + 0,055 X1 –  0,100 X2 + 0,641 X3+ e on the other side obtained simultane ously test independent variable (profitability ratio) have significant effect to dependent variable (Value of the Company) marked with Fhitung 4,149 > Ftabel 3,24, for independent and partially dependent influence that return on asset and return on equity not a significant effect to Value of the Company, while net profit margin has a significant effect to Value of the Company. The independent variable (profitability ratio) is able to influence the dependent variable (Value of the Company). Rated R Square 43,8%, while the remaining 56,2% explained other factors beyond the study models.  Key Word: Net Profit Margin, Return on Asset, Return on Equity


2020 ◽  
Vol 78 (7) ◽  
pp. 861-868
Author(s):  
Casper Wassink ◽  
Marc Grenier ◽  
Oliver Roy ◽  
Neil Pearson

2004 ◽  
pp. 51-69 ◽  
Author(s):  
E. Sharipova ◽  
I. Tcherkashin

Federal tax revenues from the main sectors of the Russian economy after the 1998 crisis are examined in the article. Authors present the structure of revenues from these sectors by main taxes for 1999-2003 and prospects for 2004. Emphasis is given to an increasing dependence of budget on revenues from oil and gas industries. The share of proceeds from these sectors has reached 1/3 of total federal revenues. To explain this fact world oil prices dynamics and changes in tax legislation in Russia are considered. Empirical results show strong dependence of budget revenues on oil prices. The analysis of changes in tax legislation in oil and gas industry shows that the government has managed to redistribute resource rent in favor of the state.


2011 ◽  
pp. 19-33
Author(s):  
A. Oleinik

The article deals with the issues of political and economic power as well as their constellation on the market. The theory of public choice and the theory of public contract are confronted with an approach centered on the power triad. If structured in the power triad, interactions among states representatives, businesses with structural advantages and businesses without structural advantages allow capturing administrative rents. The political power of the ruling elites coexists with economic power of certain members of the business community. The situation in the oil and gas industry, the retail trade and the road construction and operation industry in Russia illustrates key moments in the proposed analysis.


2019 ◽  
Vol 16 (6) ◽  
pp. 50-59
Author(s):  
O. P. Trubitsina ◽  
V. N. Bashkin

The article is devoted to the consideration of geopolitical challenges for the analysis of geoenvironmental risks (GERs) in the hydrocarbon development of the Arctic territory. Geopolitical risks (GPRs), like GERs, can be transformed into opposite external environment factors of oil and gas industry facilities in the form of additional opportunities or threats, which the authors identify in detail for each type of risk. This is necessary for further development of methodological base of expert methods for GER management in the context of the implementational proposed two-stage model of the GER analysis taking to account GPR for the improvement of effectiveness making decisions to ensure optimal operation of the facility oil and gas industry and minimize the impact on the environment in the geopolitical conditions of the Arctic.The authors declare no conflict of interest


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