hole drilled in the ground or underground; geotechnical or mining facility used for the exploration and recovery of raw material or water, soil exploration etc.     

breaking of viscosity; reduction of viscosity by cracking big molecules of hydrocarbons at high temperatures without the presence of a catalyst.

the technological operation of producing natural gas on oil/petroleum and gas fields; water, gas condensate, harmful admixtures in the natural gas and damp are separated from the mixture of natural gas, gas condensate and water, and the natural gas is delivered for further treatment (degassing), storage or directly for consumption.

gases for miscellaneous industrial use which is not related to energy, medicine, traffic, laboratories, etc.: oxygen, argon, nitrogen, hydrogen, carbon dioxide, acetylene, helium, etc; mostly delivered under pressure in steel cylinders, then in special tanks, and some liquefied.

the term ‘natural tar’ is sometimes used for heavy petroleum (bitumen) that has penetrated to the surface of the Earth; heavy residues discharged from gases during gasification of coal and wood, feedstock for chemical industry; deposits in chimneys where furnaces are fed with coal or wood.

methods of depleting oil/petroleum reservoirs for the purpose of increasing the oil/petroleum recovery from the reservoir, when the reservoir has no longer enough energy to suppress oil/petroleum through the pore/inter-terrestrial space up to the well; additional energy is introduced into the reservoir by injecting water or natural gas.

further processing of products which were produced by primary refining of crude oil (by atmospheric distillation); chemical processes which change the structure of hydrocarbon molecules, producing final products for the market.

the

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extraction of oil/petroleum and natural gas (as well as gas condensate and associated water) from a reservoir through a well to the wellhead on the surface.