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a stage in the allocation of offshore
licenses in which a state places a number
of specified areas in its sector on
offer to oil companies at one time
Bill of lading
a document which is receipt for cargo
received on board and is evidence of the
contract between shipper and shipowner
It is also evidence of title to the goods
described on it
Conservation
regulation of oil and/or gas production
from a reservoir in order to prolong its life
and hopefully recover a larger quantity of
the oil or gas in place, reinjection of associated
gas for future use
Consortium
a group of unrelated companies who act
together in a particular venture
Continental shelf
the edge of a continental mass that lies
under the sea in comparatively shallow
water (up to a water depth of 200 meters)
Depletion control
a restriction imposed on the rate at which
oil and gas reserves can be depleted, i e
from reservoir
Wellhead
the control equipment fitted to the top of
a well casing, incorporating outlets,
valves, blowout preventers, etc
Concession
a license area that is leased to a company
for a given period for exploration and
development under specified terms
and conditions
Corrosion
the progressive breakdown of a metal
structure by chemical or electrolytic
attack, e g rusting
Recovery factor
the ratio of recoverable oil and/or gas
reserves to the estimated oil and/or gas
in place in the reservoir
Edge water
water underlying and/or marginal to an oil
or gas reservoir
Crane barge
a barge that carries a large crane (or
cranes) for use in assembling or repairing
offshore structures
Rotliegendes
formations laid down during the first part
of the Permian Period in which natural
gas fields are sometimes found
Cracking
the process whereby hydrocarbon
molecules of high molecular weight are
broken down to lighter molecules
Critical temperature
the maximum temperature at which a gas
can be liquefied, i e the temperature
above which a liquid cannot exist
Crown
the uppermost section of a derrick
Crown block
the fixed system of pulleys fitted at the
top of a derrick for use in raising and lowering
the drill string, casing, etc
Very large crude carrier (VLCC)
a large ocean-going tanker, over 200,000
metric tons deadweight used to transport
crude oil from its source to a transhipment
storage facility or directly to a refinery
Cubic loot
the standard unit used to measure quantity
of gas (at atmospheric pressure),
1 cubic foot = 0 0283 cubic meters
Manway
a port in the wall or cove of a tank or
reactor, for inspection purposes or for
charging the vessel with raw materials
or additives
Light crude
crude oil with a low specific gravity
and high API gravity due to the
presence of a high proportion of light
hydrocarbon fractions
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