a trap where a bed or reservoir rock gets
progressively thinner as it nears an impervious
area and eventually disappears
Buy-back price
the purchase price that an oil company
pays to a state for oil that the company
produces but which belongs to the state
Sour crude
crude oil with a high sulphur content
Sour gas
natural or associated gas with a high sulphur
content
Head
the height of the surface of a liquid above
a specific point, especially when used as
a measure of the pressure at that point
Yield
the quantity of product from a process
based on specific weights of raw materials
Coming out of hole
the withdrawing of the drill string from the
well bore
Viscosity
a measure of the resistance that a fluid
makes to motion or flow, it usually decreases
as the temperature rises
Oil gasification
the manufacture of gas from oil for use as
a fuel
Coal gasification
the manufacture of fuel gas from coal
Gas cap
a layer of natural gas above the oil in an
oil reservoir
Gas field
a field containing natural gas but no oil
Gas to oil ratio (GOR)
the volume of gas at atmospheric pressure
produced in association with a unit
volume of oil
Gas-oil
the medium distillates from the oil refining
process intermediate between light lubricating
oils and kerosene, used to produce
diesel fuel and burned in central
heating systems
Natural gas liquids (NGL)
liquid hydrocarbons found in association
with natural gas
Gas cap drive
a recovery mechanism whereby the oil from
the reservoir is displaced by the downward
expansion of an overlying gas cap
Gaseous fuels
the light, highly volatile distillates from the
refining process, used to manufacture
motor spirit, aviation gasoline and camping
gas
Gasification
the process whereby gaseous fuel is
manufactured from a solid or liquid fuel
Separation plant
see processing plant
Gas pipeline
a pipeline used to transport gas between
two places, either offshore or onshore
Hexane
the saturated hydrocarbon (alkane) with
six carbon atoms in its molecule, the sixth
member of the paraffin series a liquid
under normal conditions
Helium
a naturally occurring inert gas that is
mixed with oxygen to provide a safe
breathable atmosphere for divers working
under high pressure
Gel
see bentonite
Geology
the science relating to the history and
development of the Earth's crust
Geosyncline
a large sedimentary basin in which
extremely deep layers of sediments have
accumulated over a long period of time
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