We investigate the pricing formation of natural gas markets on three different continents (Europe, Asia and North America). We find that natural gas markets showed a strong relationship with the crude oil market between 1992 and 2001 and natural gas prices tended to thermal parity with crude oil prices. From 2002 natural gas markets exhibited a less pronounced relationship with the crude oil ma...

The paper presents introduction to the research on possible supplying ship diesel engines with mixtures of diesel oils and vegetable oils or their esters with accounting for ecological aspects – exhaust gas purity. Characteristics of vegetable oils and their esters are compared with those diesel oils. Consequences of their application to diesel engines, mainly for their working process and exha...

The need for oil and natural gas as a major source of energy is vital. On the one hand, it has affected the political and economic equations at the international, regional and national level. On the other hand, it has had negative effects on sociocultural, legal, and environmental aspects as well as on the physical and mental health of human beings. Therefore, the need to provide an environment...

the experimental study and modeling of gravity drainage during water alternative gas injection, wag process, in carbonate rock for one of the iranian off-shore reservoir at lab-scale were carried out. the mechanism of gravity drainage during the wag process, and its contribution to the oil recovery in the fractured carbonate reservoirs were also studied. in the wag process alternatively gas is ...

Abstract Oil is a generic term that can cover very wide range of natural hydrocarbon-based substances and also refined petrochemical products. Crude oil petroleum products have physical properties on the basis which their behaviour in marine environment differ widely. These from viscosity (the rate at liquid flows), density, specific gravity (density relative to water).

by using a model of development, called developmental state, which appeared during the history of development in east asia region, the current essay tries to present a review on possibility of iran’s transition to economic development. it is supposed that the ground is prepared for iran’s transition to development through effective state intervention in economy. unlimited access of iran to a ve...

Colorado and Pennsylvania, like parallel universes, provide strikingly different examples of how external forces affect the evolution of oil and gas conservation jurisprudence originating from a common starting point. This jurisprudence includes both “Classical” oil and gas conservation—measures to prevent waste of the oil and gas resource, and “Values” oil and gas conservation—measures that ad...