Recoverable reserves

that proportion of the oil and/or gas in a

reservoir that can be removed using currently

available techniques

Isobutane

the branched form of butane, used in the

manufacture of isooctane, one of the

components of high-quality motor and

aviation fuel

Isomers

different molecular structures of a chemical

compound, e g n-butane and isobutane,

the two isomers of C4H10

Oesilters

see hydrocyclones

Inert

unreactive Resistant to chemical reactions

with other substances

Drilling engineer

the engineer who designs the casing

and is responsible for the drilling program

for a well

Petroleum engineer

the engineer who is responsible for the

overall strategy of oil and gas drilling and

production operations for a particular field

Mud engineer, mud man

the service man in charge of maintaining

the mud systems on a drilling rig to

the specifications set out in the

drilling program

Ion

positively or negatively charged atom or

group of atoms

Deviated well

a well drilled in such a way that its controlled

direction departs progressively

from the vertical, such wells are drilled in

order to reach different parts of a reservoir

from a single platform A well may

also be deviated to avoid junked drilling

equipment left in the original hole

Evaporation

conversion of a liquid to a vapor, without

necessarily reaching the boiling point

Leakage test

the process of applying pressure to the

formation below the casing seat to test

the quality of cementing and to determine

the fracture pressure in the

permeable zone immediately below the

casing seat

Drill stem test (OST)

a test whereby the nature and quantity of

the formation fluids in a possible oil-or

gas-bearing stratum are determined by

allowing them to flow to the surface

through the drill string under carefully

controlled conditions

Feedstock

the supply of crude oil, natural gas

liquids or natural gas to a refinery or

petrochemical plant or the supply of

some refined fraction of intermediate

petrochemical to some other process

Cavitation

the formation of a space in a flowing liquid

by a fixed object in its path or a stationary

liquid by a moving object, e g,

behind the blades of an agitator, or in a

pump which has been incorrectly primed

Calibration

determination of the accuracy of an

instrument by finding its variation from

the true measurement

Дата добавления: 2015-11-14