- Oil & Gas
- Production Glossary
- Process of dismantling wellhead,
production and transportation facilities and restoration of depleted
producing areas in accordance with licence
requirements and /or legislation.
- Form of hydrochloric acid is pumped down well hole to enlarge
pore space in oil bearing rocks to increase flow and recovery.
- Record of time taken by a sound wave to travel over a certain
distance through geological formations.
- An enhanced recovery technique in which
air is injected into hydrocarbon formation to increase reservoir pressure.
- Any techniques, other than natural
drives, for bringing oil to surface.
- Condensate and gas produced simultaneously
from outset of production.
- Method used to minimise rate of electrochemical corrosion
of structures, for example, installations offshore, pipelines
and storage tanks.
- Branching series of pipes, gauges and valves on top end of
each production well to control flow of oil or gas.
- Descriptive of a well that is capable
of producing, but is not currently producing.
- Used to carry production equipment
to bottom of well.
- Producing oil and gas from two or more reservoirs
at different depths, or where product of two or more fields is
transported via a common pipeline.
- Drilled at a distance from a discovery
well to determine physical extent, reserves and likely production
rate of a new oil or gas field.
- Phase on which a proven oil or gas field
is brought into production by drilling production (development)
- A production well drilled with intent of producing oil or
gas from a proven field.
- A well completed to produce from two separate reservoirs.
- Deviated wells (over 65 degrees)
from vertical and reach out horizontally more than twice vertical
- Geographical area under which an oil or gas reservoir
- Field ceased production (FCP)
- Field under development (FUD)
- Field in production (FIP)
- Flaring is burning of hydrocarbon gases for commercial or
technical reasons. Venting is release of gases to atmosphere.
- Steel structure on an offshore installation or at a processing
facility from which gas is flared.
- Gas Cap
- In field containing both gas and oil,
some gas will often collect at top of reservoir
in a single deposit.
- Reservoir containing both natural
gas and oil, with greater
proportion of gas. Condensate appears when gas in drawn from
well, and its temperature and pressure change sufficiently for
some of it to became liquid petroleum.
- Gas field
- Field containing natural gas, but no
- Central collection point for offshore gas fields. Production
is then piped to central processing system
- Gas Injection (GI)
- Gas from same or nearby field is mixed
with oil in tubing
to lessen weight of liquid column.
Gas Oil Ratio (GOR)
- Separation of oil and gas, and removal
of impurities and NGLs from natural
- Either concrete or hybrid (concrete base and steel legs and
superstructure) structures that due to weight rest on seabed
or piled into it.
- Supporting (concrete base or steel legs) structure for an
- Pipe connecting offshore installation to a subsea wellhead
or pipeline for drilling or production
- Self-contained box or package built
with a specific purpose (for example, well head, oil and gas
separation, gas compression, platform power generation, mud,
storage, diesel, filter and exhaust) located on production installations.
- More than one horizontal
section drilled in one well. Used to maximise number of wells
that can be drilled from small installations.
- Offshore Oil Loading
- Single buoy mooring (SBM)
- Single point mooring (SPM)
- Exposed location single buoy mooring (ELSBM)
- Enables offshore loading with vessel swinging to present
least resistance to prevailing wind or current conditions.
Oil in Place
- Device for cleaning a pipeline or
separating two liquids being moved down pipeline. (Intelligent
pig - fitted with sensors to check for corrosion or defects in
- Long steel piles driven into the seabed
to anchor fixed offshore structures solidly in place.
- A pipe through which natural
gas, crude oil or petroleum
products are pumped between two points, either onshore or offshore.
- Level of peak oil or gas field production;
it is always followed by declining level of production.
- Fixed structure resting on seabed or piled
- Maintenance carried out prior to unit or system failure.
- Brines naturally present or injected into reservoir
to enhance production. Produced along side oil production.
- Drilling of wells in order to bring a field into production.
- An installation from which development
wells are drilled and that carries all associated processing
plants and other equipment needed to maintain a field
- Retroactive adjustment to relative percentage interests of
joint venturers in a field.
- Reserves at present cannot be regarded as "probable".
- Subsurface, porous, permeable rock formation in which hydrocarbons are present.
- Powered by difference in pressures within reservoir
- Used to predict reservoir behaviour
during production to enable selection of most efficient method
- An offshore structure that depends on another installation
for materials or services.
- Slug catcher
- Plant installed in a gas pipeline system to
catch unwanted "slugs" of liquid.
- Allows wells to be put on production without need to build
a platform to operate and maintain wells.
- A wellhead installed on
the sea floor and controlled remotely from a platform, a floating
production facility or land.
- Support form of an offshore installation on which derrick,
engines, helicopter pad, cranes, etc. are installed.
- Tension Leg Platform
- A floating offshore structure held in position by a number
of tension-maintaining cables anchored to seabed. Cables dampen
wave action to keep platform stationary.
- Onshore transit installation that receives oil or gas from
offshore production facilities via pipeline
and / or tankers. Plant and equipment designed to receive and
process crude oil or gas to remove water and impurities.
- Piping installed in wells for production
of oil and gas.
- Top of an installation positioned on jacket.
Water Injection (WI)
- Water is pumped into alternate wells in a field.
Pressure in reservoir as a whole can
be maintained or increased and production can be maintained or
- Well Nomenclature (Field)
- Re-entry into a completed field well
for modification or repair. Restoring well productivity by cleaning
out accumulations of sand, silt or other substances that clog
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