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an organic solvent based on aliphatic as
opposed to aromatic compounds
Alkanes
the simplest homologous series of saturated
aliphatic hydrocarbons, consisting
of methane (CH4), ethane (C2H6),
propane (C3H8), etc, also known as
the paraffins
Alkenes
the homologous series of aliphatic
hydrocarbons containing one double,
(unsaturated) carbon-to-carbon bond,
consisting of ethene (C2H4), propene
(C3H6), butene (C4H8), etc, also known
as the olefins
Alkyl
the term used to describe an organic
radical (group) consisting of an open carbon
containing no unsaturated carbon-tocarbon
bonds - e g the methyl (CH3)
and ethyl (C2H5) radicals
Alkynes
the homologous series of aliphatic hydrocarbons
containing one triple (unsaturated)
carbon-to-carbon bond, consisting of
ethyne (C2H4), propyne (C3H4), butyne
(C4H4), etc
Depreciation
the reduction in the value of plant or
equipment over time due to wear, tear
and obsolescence
Anticline
a tectonic structure in which strata are
folded so as to form an arch or dome (i e
convex on top), see tectonic process
Anticlinal trap
a hydrocarbon trap formed by the
upward bowing of strata into a dome
or arch
ASTM
American Society for Testing Materials
Rental payment
an annual payment made by an oil company
to a State in order to retain rights in
a particular concession
Royalty
a share of the production or revenue
reserved by the grantor of an oil lease
or license
Hydrometer
an instrument used to measure the density
or specific gravity of a liquid
Aromatic
the term used to describe organic compounds
that contain one or more unsaturated
ring structures with delocalized
electrons, e g benzene (C6H6)
Alkylaromatic
an organic compound consisting of an
alkyl radical attached to an aromatic ring
such as benzene
Asphalt
see bitumen
Atmospheric pressure
the pressure of air in the open atmosphere,
exerted equally in all directions
The standard pressure at sea level is that
which will support a column of mercury
760 millimeters high (29 92 ins) This is
equivalent to about 14 7 pounds to the
square inch, or 1 0133 bar
Attapulgite
a clay used in salt water drilling muds to
improve the mud's carrying capacity,
also called salt gel
Sealed bid auction
an auction in which the competing
parties submit confidential bids by a
specified date, sometimes known as a
blind auction
Supply base
an onshore base from which supply
boats operate
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