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the low-molecular-weight, low-boiling
point fractions that emerge from the
upper part of a fractionating column during
the oil refining process
Injection molding
a plastics-forming process in which
molten plastic is forced into a mold under
pressure and allowed to solidify
Production tubing
the pipe in a production well through
which oil or gas flows from the reservoir
to the surface, also known as the production
string
License block
a section of continental shelf area in a
particular national sector bounded by latitude
and longitude lines, generally at
one-degree intervals, a license block is
usually sub-divided into smaller areas
License
an authority to explore for or produce oil
or gas in a particular area issued to a
company by the governing state, see
exploration license, production license
Production license
a licence to produce oil or gas in a particular
area issued to a company by the
governing state
Exploration license
a license to explore for oil or gas in a particular
area issued to a company by the
governing state
Fishing
an attempt to recover tools or drilling
equipment ("fish") lost downhole
Trap
a geological structure in which hydrocarbons
build up to form an oil or gas field
Unconformity trap
a trap in which the escape of hydrocarbons
is prevented by impervious rocks
unconformably overlying the reservoir -
see unconformity
Salt pillow trap
a form of anticlinal trap produced by a
pillow of salt forcing the overlying rocks
upwards into a dome
Salt dome trap
a trap produced by an impervious
salt dome
Fault trap
a trap where a reservoir layer is faulted and
brought against an impervious formation
Horsepower
a unit of power One horsepower is
equivalent to approximately 746 watts
Lump sum freight
a fixed freight rate, regardless of how
much cargo is loaded
Magma
molten material originating from deep
within the Earth's crust, the material from
which igneous rocks form
Magnetometer survey
a geological survey method in which
sedimentary
basins are identified and their
size determined by measuring the
magnetic properties of the underlying
igneous rocks
Marginal field
a field that may or may not produce
enough net income to make it worth
developing at a given time, should
technical or economical conditions
change, such a field may subsequently
become commercial
Sweet crude
crude oil with a low sulphur content
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