Oil Gas Terms

8/2/2019 Oil Gas Terms

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Oil & Gas Glossary

Abandonment / Decommissioning /

Process of dismantling wellhead, production and transportationfacilities and restoration of depleted producing areas in accordance

with licence requirements and /or legislation.

Abandonment Allowance (AA) A 100% allowance for expenditure incurred in respect of abandoning afield.

AAIB Air Accidents Investigation Branch, in UK.

ABS American Bureau of Shipping

Accident Any event which results in injury, and / or damage, and / or loss.

Acoustic log Record of time taken by a sound wave to travel over a certain distance

through geological formations.

Acid stimulation

Form of hydrochloric acid is pumped down well hole to enlarge porespace in oil bearing rocks to increase flow and recovery.

ACOP Approved Code of Practice

ACQ Annual Contract Quantity

AD Anaerobic Digestion

ADELT Automatically Deployed Emergency Location Transponder

Aero-magnetic surveys Magnetometers, towed by aircraft, help to detect magnetic anomalies

or to distinguish geologic features that might appear similar from

seismicdata alone.

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AFDS Automatic Flotation Deployment System

AFE Authorisation for Expenditure

Air Emissions Waste gases, vapours and small particles released into air.

Air gun Air gun array is most common technique used forseismic surveyingoffshore. Compressed air is released from a chamber to produce shock

waves in earth.

Air injection An enhanced recovery technique in which air is injected into

hydrocarbon formation to increase reservoirpressure.

ALARP As Low As Reasonably Practicable

Alkylation Refining process for converting light, gaseous olefins into high-octanegasoline components (reverse of cracking).

Annex B

Development plan approval to develop and produce from acommercial

field.

Annulus []Space between drill-string and earthen wall ofwell bore, or betweenproduction tubing and casing.

Anticline Fold in layered rocks originating below surface in form of anelongated dome.

AOGBO

Application Outside Great Britain Order

Appraisal drilling Drilling to determine physical extent, reserves and likely production

rate of a reservoir, together with properties ofoil orgas.

Appraisal expenditure

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Costs incurred in survey, exploitation and appraisal oflicence areas

not yet underdevelopment or in production.

Appraisal well A well drilled as part of an appraisal drilling programme.

APRT AdvancedPetroleum Revenue Tax

AQFD Air Quality Framework Directive

Aquifer Underground zone of permeable rock saturated with water under

pressure.

Aromatics Class ofhydrocarbons that have at least onebenzenering as part of

their structure. Generally describes benzene and benzene derivatives.

ARPAS Automatic Radar Plotting Aids

Artificial lift Any techniques, other than natural drives, for bringing oil to surface.

ASB Accounting Standards Board

Associated Gas Natural gas associated with oil accumulations, either dissolved in oil orfound as a cap of free gas above oil inreservoir.

ASTM American Society for Testing and Materials

Atmospheric pressure Weight of atmosphere on surface of Earth. At sea level approx. 1.013

bars.

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Bar One bar = 100 kPa

Barge

Non-self-propelled marine vessel used as cargo tankers, as equipmentand supply carriers,crane platforms and support and accommodation

bases in offshore drilling, and as submarine pipe-laying vessels.

Barrel (bbl) 7.3 bbls = Onetonne: 6.29 bbls = One cubic metre: One bbl = 159

litres approx.

BAT Best Available Technology

BATNEEC Best Available Technology Not Entailing Excessive Cost

bcf BillionCubic Feet(One bcf = 0.176 Mboe)

bcm BillionCubic Metres (One bcm = 0.83 MToe)

Benzene An aromatic hydrocarbon present to a minor degree in most crude oils.

(Products manufactured from benzene include styrene, phenol, nylonand synthetic detergents.)

BHP Bottom Hole Pressure

BLEVE Boiling Liquid Expanding Vapour Explosion

BlockUKCS acreage one thirtieth of a quadrant(approx. 200 - 250 sq. kms).

Generally defined in terms of latitude and longitude, at one-degreeintervals.

Blow-down

Condensate and gas produced simultaneously from outset of

production.

Blow-out Preventers (BOPs)

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High-pressurewellhead (top ofcasing) valves designed to shut-off

flow ofhydrocarbonsto prevent blowouts (accidental escapes ofoil or

gas from a well).

BNOC

British National Oil Corporation set up 1976 abolished 1985.

boe / bopd /Bbls of oil equivalent / Bblsof oil per day

Bottom-hole assembly Components, together as a group, that make up lower end ofdrill-string (drill bit,drill collars, drill pipe and ancillary equipment).

Bottom Out

To reach objective depth in drilling a well.

BPEO Best Practical Environmental Practices

Brent blend International marker forcrude oil pricing based on a blend ofNorth

Sea crudes.

BRIGHTEYE []Regular UKCS exercise to test search and rescue capability.HKCS

BRINDEX []Association of British Independent Oil Exploration Companies

British Thermal Unit (BTU) One BTU or Btu = 1.05506kJ = 0.293 watt-hour

BROA []British Rig Owners Association

Butane (C4H10)

Either of two saturatedhydrocarbons, or alkanes, with chemicalformula. In both compounds carbon atoms are joined in an open chain.

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CA Certifying Authority

CAA

Civil Aviation Authority, in UK

Calorific equivalentsOnecubic foot of gas = 1000 BTUs= 1055.06 kJApprox. one million tonnes ofoil = 40 x 1012BTUs=40,400 MJ

Candela SI unit of light intensity defined as 1/60 of the light radiated from a sq.

cm of a blackbody, a perfect radiator that absorbs no light, held at thetemperature of freezing platinum.

CAP Civil Aviation Publications

Capex Capital Expenditure

Capillaries Minute spaces, cracks or pores in rock through which hydrocarbon

fluids move in response to natural forces.

Capping

Tightly closing a well so that hydrocarbons cannot escape.

Carbon Atomic number is 6; element is in group 14 (or IVa) of periodic table.

Carbon content of a hydrocarbon determines, to a degree,hydrocarbon's burning characteristics and qualities.

Carbon Dioxide (CO2) Colourless, odourless, and slightly acid-tasting gas, sometimes-called

carbonic acid gas, molecule of which consists of one atom ofcarbonjoined to two atoms of oxygen. Carbon dioxide in atmosphere tends to

prevent escape of outgoing long-wave radiation from Earth to outerspace; as more heat is produced and less escapes, temperature of Earthincreases. Most important man-made greenhouse gas in UK

accounting for 81% of direct global warming potential from national

greenhouse emissions in 1990.

Carbon Monoxide (CO) Chemical compound ofcarbon and oxygen.

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Carboniferous Period of geological time about 400 - 300 million years ago.

Cardigan Bay ()Semicircular inlet of Saint George's Channel in Irish Sea, westernWales. Bay is about 105 km long and about 56 km wide.

Casing Steel lining used to exclude unwanted fluids; control well pressures;

support sides ofwell bore. Casing Seat - lowest point at which casingis set. Casing head - top of casing set in well; part of casing that

protrudes above surface and to which control valves and flow pipes are

attached.

Casing perforation Holes made in linerof a finished well to allowhydrocarbons to flowintoproduction tube.

Cathodic protection Method used to minimise rate of electrochemical corrosion of

structures, for example, installations offshore, pipelines and storage

tanks.

CATS Central Area Transmission System (UKCS)

CBA /Cost Benefit Analysis / Assessment

CCAB Consultative Committee of Accountancy Bodies

CD Consultation Document

CDP

common depth point

CE EU Mark of Conformity

Cement Pumped into space between casing and well bore wall in order to hold

casing in place.

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CEN European Standards Organisation

Central North Sea (CNS)Oil and gas-condensate bearing province (Latitudes 55 degrees - 59degrees).

Methane (CH4) Also marsh gas, gas composed ofcarbon andhydrogen, first member

of paraffin or alkane series ofhydrocarbons. Methane contributed 12%(counting both direct and indirect global warming effects) of UK

national greenhouse gas emissions in 1990. Oil and gas production

accounted for 2% of national emissions in 1990.

CHARM Chemical Hazard And Risk Management

Chlorofluorocarbon (CFC) Synthetic chemical that is odourless, non-toxic, non-flammable, and

chemically inert. Released into atmosphere, chlorine-containing

chemicals rise and are broken down by sunlight, whereupon chlorine

reacts with and destroysozone molecules.

ChokeDevice to restrict rate of flow during testing of anexploratory

discovery.

Christmas tree Branching series of pipes, gauges and valves on top end of each

production well to control flow of oil or gas.

CIMAH Control of Industrial Major Accident Hazards (Regulations)

Circulation Techniques for bringingcuttings from bottom ofwell bore to surface

by continuously pumping drilling mud down through drill-string andup annulusduring rotary drilling.

CITHP

Closed In Tubing Heat and Power

Closed-in

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Descriptive of a well that is capable of producing, but is not currently

producing.

Coal

During Carboniferous period much of world was covered withvegetation growing in swamps. This vegetation died and becamesubmerged under water. As decomposition took place, vegetable

matter lost oxygen and hydrogen atoms, leaving a peat deposit with a

high percentage of carbon. As time passed, layers of sand and mudsettled from water over some of peat deposits. Pressure of these

overlying layers, as well as movements of earth's crust and sometimes

volcanic heat, acted to compress and harden deposits, thus producingcoal.

Coiled tubing

Used to carry production equipment to bottom of well.

Combined-cycle gas turbine (CCGT) Generation of electrical power by a combination of a gas-turbine cycle

and a steam-turbine cycle.

CHP (Combined Heat and Power) Combination of heat and power generation in same plant. Methodreduces overall consumption of fuel by exploiting otherwise wasted

heat from conventional electricity generation.

Commercial field

Fieldjudged to be capable of producing sufficient net income to be

worth developing.

ComminglingProducing oil and gas from two or morereservoirs at different depths,or where product of two or more fields is transported via a common

pipeline.

CompensatorKeeps drill-sting stationary while semi-submersible and derrickmove.

Competence Ability to perform particular job in compliance with performancestandards.

CONCAWE The Oil Companies European Organisation for Environmental andHealth Protection, based in the Hague.

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Condensate Liquid mixture ofpentane and higherhydrocarbons.

Conductor Wide-diameter pipe from drilling platform to sea-bed to guide drillingand contain drilling fluid.

Consortium A group of unrelated companies acting together in a specific venture

(Licence application).

Continental Shelf Edge of a continent which lies under seas less than 200 metres deep.

Continental Shelf Act Passed by UK Parliament in 1964

Continental Shelf Convention Ratified by 22 States and became International Law in 1964.

Conveying & Treating (C&T) []Services provided by afield to other fields in vicinity.

COSHH

Control of Substances Hazardous to Health (Regulations)

CPG Clean Power Generation

Crane Barge Vessel capable of lifting heavy equipment onto / off offshore

installations.

Cretaceous Period of geological time about 144 - 65 million years ago.

CRINE

Cost Reduction Initiative for the New Era

CRISTAL []Contracts Regarding an Interim Supplement to Tanker Liability for Oil

Pollution

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Cross Field Allowance (CFA)An element (up to 10%) of immediate relief for qualifyingfield

development costs where a participator on a new taxable development

has, or expects to have, PRTprofits in another taxable field.

CSON[ ]Continental Shelf Operations Notice

CSS

Co-ordinated Surface Search

CSWIP Certification Scheme for Welding Inspection Personnel

CT Corporation Tax

Cubic foot Standard unit used to measure quantity ofgas at atmospheric pressure

(One cubic foot = 0.0283cubic metres).

Cubic metre SI unit used to measure quantity ofgasat atmospheric pressure

(One cubic metre = 35.31cubic feet)

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Danger Risk of injury

Dangerous occurrence Readily identifiable event with potential to cause anaccident ordisease to persons at work and public or of significant actual ofpotential material damage.

DCQ Daily Contracted Quantity

Deep-Water Discovery An offshore discovery located in at least 200 metres of water.

Delineation well Drilled at a distance from a discovery wellto determine physicalextent, reserves and likely production rate of a new oil or gasfield.

Deviated well Horizontal well drilled at an angle (over 80 degrees) to vertical.

Development Phase on which a proven oil or gas field is brought into production

by drilling production (development) wells.

Development well A production well drilled with intent of producing oil or gas from aproven field.

Devonian Period of geological time about 400 - 300 million years ago.

Discount rate Used to convert future income / expenditure to its present day value.

Discovery well

An exploratory well that finds hydrocarbons.

Dogleg []Deliberate of accidental sharp bend in a well.

Downhole A term to describe tools, equipment and instruments used in well

bore.

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Downstream Relates to oil and gas refining, marketing and distribution activities.

(see also Upstream.)

Downtime Offshore operations discontinued due to adverse weather or other

factors.

DPD Dangerous Preparations Directive

Drill bit Located at end ofdrill-stringcutting head is generally designed with

three cone-shaped wheels tipped with hardened teeth. Drill bits used

for extra-hard rock are studded with thousands of tiny industrialdiamonds.

Drill collars Heavy pipe-sections that put weight on drill bit.

Drill cuttingsLifted continually to surface during drilling by a circulating-fluid

system driven by a pump. To facilitate removal of cuttings,mud is

constantlycirculated down through drill pipe, out through nozzles indrill bit, and then up to surface through space between drill pipe and

well bore through earth (diameter of bit is somewhat greater thanthat of pipe).

Drill Ship Free floating mobile drilling platform used in very deep waters.

Positioned by dynamic positioning.

Drilling Mud / Fluid Mixture of base substance and additives used to lubricate drill bit

and to counter act natural pressure in formation. Drilling mud

provides circulation, flushing rockcuttingsfrom bottom ofwell

bore to surface.

Drill-string Series of connected 9 metre length drill pipes (joints).

Dry gas Or Lean gas is natural gas composed mainly ofmethane.

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Dry Hole Unsuccessful well, drilled without finding commercial quantities ofhydrocarbons

DSV Diving Support Vessel

Dual Completion A well completed to produce from two separate reservoirs.

Dead Weight (dwt) Difference between loaded and unloaded weights of a ship.

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E&A Exploration and Appraisal

E&P

Exploration and Production

ECOFIN Council ofEU-15 Economy and Finance Ministers

Energy Charter Treaty (ECT) Signed by 45 governments and EU in Lisbon, Portugal on 17

December 1994

EER

Evacuation, Escape and Rescue

EERTAG []Evacuation, Escape and Rescue Technical Advisory Group

ELSBM []Exposed location single buoy mooring (ELSBM)

English Channel (EC) Narrow sea separating France and UK. It is 180 km wide in west

where it meets Atlantic Ocean and narrows to 34 km at Strait of

Dover in east at its junction with theNorth Sea.

Enhanced reach

Deviated wells(over 65 degrees) from vertical and reach outhorizontally more than twice vertical depth.

Environment External surroundings and conditions in which a company or anindividual operates or which may effect, including living systems

therein.

Environmental controls

Put in place to meet or exceed legal requirements and to minimiseimpact on environment.

Environmental Impact Assessment (EIA) Part of project management concerned with identifying through aformal written technical evaluation likely impact (positive and

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negative) of a proposed development or activity on natural and man-

made environment.

Environmental Management Systems (EMS)

A process that examines environmental factors and activities orprocesses that industry uses.

EOR EnhancedOil Recovery

EPA Environmental Protection Act (1990)

EQO Environmental Quality Objectives

ER Emergency Response

ESA Environmentally Sensitive Area

ESD Emergency Shut Down

ESDV

Emergency Shut Down Valve

Esters Compounds formed by combination of acids and alcohols.

ETAP

Eastern Trough Area Project (UKCS)

Ethanol Chemical formed by fermentation or synthesis.

Ethene Or Ethylene simplest member of class of aliphatic organiccompounds called alkenes, which contain at least one carbon-carbon

double bond. Ethylene is a colourless, slightly sweet-smelling gas of

formula H2C=CH2. It is slightly soluble in water and is produced incommercial amounts by cracking and fractional distillation of

petroleum and fromnatural gas

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Exploration Search forhydrocarbons by Geological and Geophysical (G&G)

surveys that may be followed by exploration drilling.

Exploration expenditure All costs, including premium payments, associated with acquisitionof new acreage, drilling ofexploratory wellsand other costs

incurred in evaluating commercial viability of geological entities.

Exploration well []Drilling to determine whetherhydrocarbons are present.

Exposure

Measurement of time during which subject is atriskfrom a hazard.

http://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Hydrocarbonshttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Hydrocarbonshttp://www.eandp.demon.nl/glossary/EXPLOR~1.HTM#Exp%20Well%23Exp%20Wellhttp://www.eandp.demon.nl/glossary/EXPLOR~1.HTM#Exp%20Well%23Exp%20Wellhttp://www.eandp.demon.nl/glossary/EXPLOR~1.HTM#Exp%20Wellhttp://www.eandp.demon.nl/glossary/EXPLOR~1.HTM#Exp%20Wellhttp://www.eandp.demon.nl/glossary/EXPLOR~1.HTM#Exp%20Wellhttp://www.eandp.demon.nl/glossary/FISCAL.HTM#Commercial%20Field%23Commercial%20Fieldhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Hydrocarbonshttp://www.eandp.demon.nl/glossary/ENVIRO~1.HTM#Riskhttp://www.eandp.demon.nl/glossary/ENVIRO~1.HTM#Riskhttp://www.eandp.demon.nl/glossary/ENVIRO~1.HTM#Hazardhttp://www.eandp.demon.nl/glossary/ENVIRO~1.HTM#Hazardhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Hydrocarbonshttp://www.eandp.demon.nl/glossary/EXPLOR~1.HTM#Exp%20Well%23Exp%20Wellhttp://www.eandp.demon.nl/glossary/EXPLOR~1.HTM#Exp%20Wellhttp://www.eandp.demon.nl/glossary/FISCAL.HTM#Commercial%20Field%23Commercial%20Fieldhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Hydrocarbonshttp://www.eandp.demon.nl/glossary/ENVIRO~1.HTM#Riskhttp://www.eandp.demon.nl/glossary/ENVIRO~1.HTM#Hazard


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FAME Fatty Acid Methyl Esters

Farm-in Transfer of part of anoil orgasinterest in consideration for anagreement by transferee(s) to meet certain expenditure that would

otherwise have to be undertaken by licensee(s).

FASB Financial Accounting Standards Board

Fatal Accident Frequency Rate (FAFR) Number offatalities per 100 million man hours worked

Fatality Death due to work related injury/ illness.

Fatality Rate (FR) Number offatalities per 1000 employees.

Fault A line of fracture along which one body of rock or section of Earth's

crust has been displaced relative to another.

FDF

Finance Directors' Forum, in UK

FDR Flight Data Recording

FEA Fire and Explosion Analysis

Federal Energy Regulatory Commission (FERC) US government agency responsible for regulating gas industry.

FEHM Fire and ExplosionHazard Management

FFE Fire Fighting Equipment

Field Geographical area under which an oil or gas reservoirlies.

http://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Estershttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Oilhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Oilhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Natural%20Gashttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Natural%20Gashttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Natural%20Gashttp://www.eandp.demon.nl/glossary/LEGISL~1.HTM#Licenseeshttp://www.eandp.demon.nl/glossary/SAFETY.HTM#Fatality%23Fatalityhttp://www.eandp.demon.nl/glossary/SAFETY.HTM#Injury%23Injuryhttp://www.eandp.demon.nl/glossary/SAFETY.HTM#Injury%23Injuryhttp://www.eandp.demon.nl/glossary/SAFETY.HTM#Fatality%23Fatalityhttp://www.eandp.demon.nl/glossary/ENVIRO~1.HTM#Hazardhttp://www.eandp.demon.nl/glossary/ENVIRO~1.HTM#Hazardhttp://www.eandp.demon.nl/glossary/PRODUC~1.HTM#Reservoir%23Reservoirhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Estershttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Oilhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Natural%20Gashttp://www.eandp.demon.nl/glossary/LEGISL~1.HTM#Licenseeshttp://www.eandp.demon.nl/glossary/SAFETY.HTM#Fatality%23Fatalityhttp://www.eandp.demon.nl/glossary/SAFETY.HTM#Injury%23Injuryhttp://www.eandp.demon.nl/glossary/SAFETY.HTM#Fatality%23Fatalityhttp://www.eandp.demon.nl/glossary/ENVIRO~1.HTM#Hazardhttp://www.eandp.demon.nl/glossary/PRODUC~1.HTM#Reservoir%23Reservoir


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FishingRetrieving objects frombolehole.

FLAGS Far North Liquids and Associated Gas System (UKCS)

Flaring and venting Flaring is burning of hydrocarbon gases for commercial or technicalreasons. Venting is release of gases to atmosphere.

Flare Stack Steel structure on an offshore installation or at a processing facility

from which gas is flared.

Flash Point Lowest temperature at which vapour above a flammable liquid canbe ignited

Flotel Floating accommodation for offshore personnel.

FOB Free on board.

FOOCG

Fisheries and Offshore Oil Consultative Group, in UK.

Formation Pressure Water underlyinggasand oil in formation.

FPSO Floating Production, Storage and Offloading Vessel

FPV Floating Production Vessel

Framework Convention on Climate Change

UK signed Framework convention at Rio in 1992 and, along with

other developed countries, agreed to return its emissions of

greenhouse gases to 1990 levels by 2000 - a necessary first step

FRC Fast Rescue Craft

http://www.eandp.demon.nl/glossary/GLOS-W.HTM#well%20borehttp://www.eandp.demon.nl/glossary/GLOS-W.HTM#well%20borehttp://www.eandp.demon.nl/glossary/EXPLOR~1.HTM#UKCShttp://www.eandp.demon.nl/glossary/PRODUC~1.HTM#Flaring%20/%20venting%23Flaring%20/%20ventinghttp://www.eandp.demon.nl/glossary/PRODUC~1.HTM#Flaring%20/%20venting%23Flaring%20/%20ventinghttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Natural%20Gashttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Natural%20Gashttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Natural%20Gashttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Oilhttp://www.eandp.demon.nl/glossary/GLOS-W.HTM#well%20borehttp://www.eandp.demon.nl/glossary/EXPLOR~1.HTM#UKCShttp://www.eandp.demon.nl/glossary/PRODUC~1.HTM#Flaring%20/%20venting%23Flaring%20/%20ventinghttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Natural%20Gashttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Oil


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FRs []Financial Reporting Statements

FSA Formal Safety Assessment

FSU Floating Storage Unit

Fugitive emissions Emissions which escape from an enclosed system.

GAAP Generally Accepted Accounting Principles

GAGE Global Atmospheric Gases Experiment

Gas Cap In fieldcontaining both gas and oil, some gas will often collect at

top ofreservoirin a single deposit.

Gas/Condensate field /Reservoircontaining both natural gas andoil, with greater

proportion of gas. Condensate appears when gas in drawn from

well, and its temperature and pressure change sufficiently for someof it to became liquid petroleum.

Gas Detector Instrument to detect presence of various gases.

Gas Field Fieldcontaining natural gas, but no oil.

Gas gathering system Central collection point for offshore gas fields. Production is then

piped to central processing system onshore.

Gas Injection (GI) Associated gasis pumped back into a reservoir to maintain reservoir

pressure. In this way rate of production ofcrude oil also can beincreased.

Gas lift

http://www.eandp.demon.nl/glossary/PRODUC~1.HTM#Field%23Fieldhttp://www.eandp.demon.nl/glossary/PRODUC~1.HTM#Field%23Fieldhttp://www.eandp.demon.nl/glossary/PRODUC~1.HTM#Reservoir%23Reservoirhttp://www.eandp.demon.nl/glossary/PRODUC~1.HTM#Reservoir%23Reservoirhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Natural%20Gashttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Oilhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Oilhttp://www.eandp.demon.nl/glossary/PRODUC~1.HTM#Fieldhttp://www.eandp.demon.nl/glossary/PRODUC~1.HTM#Fieldhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Natural%20Gashttp://www.eandp.demon.nl/glossary/PRODUC~1.HTM#Pipeline%23Pipelinehttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Ass%20Gashttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Ass%20Gashttp://www.eandp.demon.nl/glossary/PRODUC~1.HTM#Reservoir%23Reservoirhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Oilhttp://www.eandp.demon.nl/glossary/PRODUC~1.HTM#Field%23Fieldhttp://www.eandp.demon.nl/glossary/PRODUC~1.HTM#Reservoir%23Reservoirhttp://www.eandp.demon.nl/glossary/PRODUC~1.HTM#Reservoir%23Reservoirhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Natural%20Gashttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Oilhttp://www.eandp.demon.nl/glossary/PRODUC~1.HTM#Fieldhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Natural%20Gashttp://www.eandp.demon.nl/glossary/PRODUC~1.HTM#Pipeline%23Pipelinehttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Ass%20Gashttp://www.eandp.demon.nl/glossary/PRODUC~1.HTM#Reservoir%23Reservoirhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Oil


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Gas from same or nearby field is mixed withoil in tubing to lessen

weight of liquid column.

Gas Oil Ratio (GOR)

Volume ofgasat atmospheric pressure produced per unit ofoilproduced.

Gasoline Mixture of lighter liquidhydrocarbons used chiefly as a fuel for

internal-combustion engines. Produced by fractional distillation of

petroleum; by condensation or adsorption from natural gas; bythermal or catalytic decomposition of petroleum or its fractions; by

hydrogenation of producer gas orcoal; or by polymerisation of

hydrocarbons of lower molecular weight.

Gas Processing []Separation of oil and gas, and removal of impurities andNGLsfromnatural gas.

Gas Treatment Removal of impurities, condensate, hydrogen sulphide andNGLs

from natural gas.

Generic Hazard Hazard which may be generally present throughout an operation or

industry, but which may have widely different levels ofrisk,

depending on specific site characteristics.

Geology Field of science concerned with origin of planet Earth, its history, its

shape, materials forming it, and processes that are acting and have

acted on it.

Geophysics Branch of science that applies physical principles to study of planet

earth.

GigawattThousand megawatts

Gigajoule One millionjoules = 278 kWh

GOP General Oil Pollution

http://www.eandp.demon.nl/glossary/PRODUC~1.HTM#Field%23Fieldhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Oilhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Oilhttp://www.eandp.demon.nl/glossary/PRODUC~1.HTM#Tubing%23Tubinghttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Natural%20Gashttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Natural%20Gashttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Natural%20Gashttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Oilhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Hydrocarbons%23Hydrocarbonshttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Hydrocarbons%23Hydrocarbonshttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Petroleum%23Petroleumhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Natural%20Gas%23Natural%20Gashttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Hydrogenation%23Hydrogenationhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Coal%23Coalhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Hydrocarbons%23Hydrocarbonshttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#NGLhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#NGLhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#NGLhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Natural%20Gashttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Natural%20Gashttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Condensatehttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#NGLhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Natural%20Gashttp://www.eandp.demon.nl/glossary/ENVIRO~1.HTM#Hazard%23Hazardhttp://www.eandp.demon.nl/glossary/ENVIRO~1.HTM#Risk%23Riskhttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Joulehttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Joulehttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#kWhhttp://www.eandp.demon.nl/glossary/PRODUC~1.HTM#Field%23Fieldhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Oilhttp://www.eandp.demon.nl/glossary/PRODUC~1.HTM#Tubing%23Tubinghttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Natural%20Gashttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Oilhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Hydrocarbons%23Hydrocarbonshttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Petroleum%23Petroleumhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Natural%20Gas%23Natural%20Gashttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Hydrogenation%23Hydrogenationhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Coal%23Coalhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Hydrocarbons%23Hydrocarbonshttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#NGLhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Natural%20Gashttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Condensatehttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#NGLhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Natural%20Gashttp://www.eandp.demon.nl/glossary/ENVIRO~1.HTM#Hazard%23Hazardhttp://www.eandp.demon.nl/glossary/ENVIRO~1.HTM#Risk%23Riskhttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Joulehttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#kWh


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GPS Global Positioning System

Gravity Structures Either concrete or hybrid (concrete base and steel legs andsuperstructure) structures that due to weight rest on seabed orpiledinto it.

Gravity surveys Measure density variations in local rock masses. Surveys are basedon use of a gravimeter downbore holes.

Greenhouse Gases Gases that alter thermal properties of atmosphere (for example,

water vapour,carbon dioxide, methane,nitrous oxide,CFCs, halonsand ozone).

GRP Glass Reinforced Plastic

http://www.eandp.demon.nl/glossary/PRODUC~1.HTM#Piling%23Pilinghttp://www.eandp.demon.nl/glossary/GLOS-W.HTM#well%20borehttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#CO2%23CO2http://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#CO2%23CO2http://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Methane%23Methanehttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#N2O%23N2Ohttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#N2O%23N2Ohttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#N2O%23N2Ohttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#CFC%23CFChttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Halons%23Halonshttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Ozone%23Ozonehttp://www.eandp.demon.nl/glossary/PRODUC~1.HTM#Piling%23Pilinghttp://www.eandp.demon.nl/glossary/GLOS-W.HTM#well%20borehttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#CO2%23CO2http://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Methane%23Methanehttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#N2O%23N2Ohttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#CFC%23CFChttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Halons%23Halonshttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Ozone%23Ozone


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Halons Halogenated carbon compounds used in fire extinguishingequipment and contributing to stratospheric ozone depletion. Being

phased out under Montreal Protocol.

Hazard Object, physical effect, or a condition with potential to harmpersons, property or environment.

HAZID Hazard Identification

HAZOP Hazard and Operability

Heavy oil Long chains ofhydrogen and carbon atoms.

Hexane Petroleum liquid found in small amounts incondensates.

Horizontal Drilling Technique for cutting abore hole in geological strata in a horizontal,

rather than normal vertical, direction. (see alsoHorizontal well)

Horizontal well

Used whenreservoirpermeability is low orhydrocarbons are beingproduced from vertical fractures in rock.

HSC / HSE /Health and Safety Commission/ Health and Safety Executive

HSWA Health & Safety At Work Act

HT / HP /High Temperature / High Pressure

HUC Hook-up and Commissioning

HUET [ ]Helicopter Underwater Escape Training

HUMS

http://www.eandp.demon.nl/glossary/ENVIRO~1.HTM#Hazardhttp://www.eandp.demon.nl/glossary/ENVIRO~1.HTM#Hazardhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Hydrogen%23Hydrogenhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Hydrogen%23Hydrogenhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Carbon%23Carbonhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Condensate%23Condensatehttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Condensate%23Condensatehttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Condensate%23Condensatehttp://www.eandp.demon.nl/glossary/GLOS-W.HTM#well%20borehttp://www.eandp.demon.nl/glossary/PRODUC~1.HTM#Horizontal%20wellshttp://www.eandp.demon.nl/glossary/PRODUC~1.HTM#Horizontal%20wellshttp://www.eandp.demon.nl/glossary/PRODUC~1.HTM#Reservoir%23Reservoirhttp://www.eandp.demon.nl/glossary/PRODUC~1.HTM#Reservoir%23Reservoirhttp://www.eandp.demon.nl/glossary/GEOLOGY.HTM#Permeablehttp://www.eandp.demon.nl/glossary/GEOLOGY.HTM#Permeablehttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Hydrocarbonshttp://www.eandp.demon.nl/glossary/LINKS.HTM#HSC%20/%20HSEhttp://www.eandp.demon.nl/glossary/ENVIRO~1.HTM#Hazardhttp://www.eandp.demon.nl/glossary/ENVIRO~1.HTM#Hazardhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Hydrogen%23Hydrogenhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Carbon%23Carbonhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Condensate%23Condensatehttp://www.eandp.demon.nl/glossary/GLOS-W.HTM#well%20borehttp://www.eandp.demon.nl/glossary/PRODUC~1.HTM#Horizontal%20wellshttp://www.eandp.demon.nl/glossary/PRODUC~1.HTM#Reservoir%23Reservoirhttp://www.eandp.demon.nl/glossary/GEOLOGY.HTM#Permeablehttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Hydrocarbonshttp://www.eandp.demon.nl/glossary/LINKS.HTM#HSC%20/%20HSE


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Helicopter and Usage Monitoring System

Hydrocarbons Family of organic compounds, composed entirely ofcarbon and

hydrogen (for example, coal,crude oil andnatural gas)

http://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Carbon%23Carbonhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Carbon%23Carbonhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Hydrogen%23Hydrogenhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Coal%23Coalhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Coal%23Coalhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Oil%23Oilhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Natural%20Gas%23Natural%20Gashttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Natural%20Gas%23Natural%20Gashttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Carbon%23Carbonhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Hydrogen%23Hydrogenhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Coal%23Coalhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Oil%23Oilhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Natural%20Gas%23Natural%20Gas


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IACS International Association of Classification Societies

IAGC International Association of Geophysical Contractors

IEA (International Energy Agency) Established in 1974 to monitor world energy situation.

IGCCIntegrated Gasification Combined Cycle

Igneous rocks Formed from solidification of molten magma.

ILO International Labour Organisation

IMCO Inter-governmental Marine Consultative Organisation

IMO International Maritime Organisation

Impermeable

Fluids cannot flow through rocks (clays, cemented sandstone or salt)where cracks and pore spaces are very small or are blocked by

mineral growth.

Incident An unplanned event or chain of events which has or could have

caused injury or illness and / or damage or loss to environment, third

parties or assets.

INC Inter-governmental Negotiating Committee

InjuryPhysical harm or damage to a person resulting from traumaticcontact between body of person and an outside agency, or from

exposure to environmental factors.

Injury Frequency (IF) Number ofinjuries per million man hours worked.

http://www.eandp.demon.nl/glossary/GEOLOGY.HTM#Magma%23Magmahttp://www.eandp.demon.nl/glossary/GEOLOGY.HTM#Magma%23Magmahttp://www.eandp.demon.nl/glossary/SAFETY.HTM#Injury%23Injuryhttp://www.eandp.demon.nl/glossary/SAFETY.HTM#Injury%23Injuryhttp://www.eandp.demon.nl/glossary/GEOLOGY.HTM#Magma%23Magmahttp://www.eandp.demon.nl/glossary/SAFETY.HTM#Injury%23Injuryhttp://www.eandp.demon.nl/glossary/SAFETY.HTM#Injury%23Injury


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Injury Rate (IR) Number ofinjuries per one hundred employees.

Injury Severity Rate (ISR) Number of days lost per one million man hours worked.

IOOG

Irish Offshore Operators Group

IPC Integrated Pollution Control

IPPC Integrated Pollution Prevention and Control

Irish Sea (IS)Arm of Atlantic Ocean, between Ireland on west and UK on east,

and covering an area of about 103,600 sq. km. Sea is connected to

Atlantic by North Channel, on north-west, and by Saint George'sChannel, on south.

ISO International Standards Association

IUOOC

Inter-Union Offshore Oil Committee, in UK

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Jacket []Supporting (concrete base or steel legs) structure for an offshore

installation.

Jack-up Rig []Mobile drilling platform with retractable legs used in shallow waters

less than 100 metres deep.

JAPECJoint Association for Petroleum Exploration Courses (UK)

JNNC Joint Nature Conservation Committee

Joint Operating Agreement (JOA) []Legal authority between Operator, who acts on behalf of a

consortium, and otherlicenseeswhich sets out terms and conditionsfor managing eachLicence.

Joint Venture (JV) A consortium of companies, usually with one member acting asOperator. share costs, revenues, assets and liabilities in proportion to

their equity interest inLicence / Field.

Joule (j) Derived SI unitof work or energy.Gigajoule = One millionjoules = 278kWh.

Jurassic Period of geological time about 213 - 144 million years ago

http://www.eandp.demon.nl/glossary/LEGISL~1.HTM#Operatorhttp://www.eandp.demon.nl/glossary/LEGISL~1.HTM#Licenseeshttp://www.eandp.demon.nl/glossary/LEGISL~1.HTM#Licenseeshttp://www.eandp.demon.nl/glossary/LEGISL~1.HTM#Licencehttp://www.eandp.demon.nl/glossary/LEGISL~1.HTM#Licencehttp://www.eandp.demon.nl/glossary/LEGISL~1.HTM#Licencehttp://www.eandp.demon.nl/glossary/LEGISL~1.HTM#Licencehttp://www.eandp.demon.nl/glossary/PRODUC~1.HTM#Fieldhttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#SI%20Unit%23SI%20Unithttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Joule%23Joulehttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Joule%23Joulehttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#kWh%23kWhhttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#kWh%23kWhhttp://www.eandp.demon.nl/glossary/LEGISL~1.HTM#Operatorhttp://www.eandp.demon.nl/glossary/LEGISL~1.HTM#Licenseeshttp://www.eandp.demon.nl/glossary/LEGISL~1.HTM#Licencehttp://www.eandp.demon.nl/glossary/LEGISL~1.HTM#Licencehttp://www.eandp.demon.nl/glossary/PRODUC~1.HTM#Fieldhttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#SI%20Unit%23SI%20Unithttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Joule%23Joulehttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#kWh%23kWh


28/56

Kick Back pressure in well from invadingoil / gas / water.

Killing a well Fillingwell bore with drilling mud of suitable density to stop flowofoil/gas.

Kilogram (kg) SI unit of mass. One thousand grams.

Kilopascal (kPa) Defined as pressure of 0.0102 kg / sq. cm

Kilowatt (kW)

One kW = 1000 watts

Kilowatt-hour (kWh) One kWh = 3.6MJ = 3,412BTU = 860 kcal = 0.0949cubic metres

of gas)

http://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Oilhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Oilhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Natural%20Gashttp://www.eandp.demon.nl/glossary/GLOS-W.HTM#well%20borehttp://www.eandp.demon.nl/glossary/GLOS-W.HTM#well%20borehttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Mudshttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Oilhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Oilhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Natural%20Gashttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Natural%20Gashttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#SI%20Unithttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#SI%20Unithttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#SI%20Unithttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Joule%23Joulehttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Joule%23Joulehttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#BTU%23BTUhttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#BTU%23BTUhttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Cubic%20Metre%23Cubic%20Metrehttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Cubic%20Metre%23Cubic%20Metrehttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Oilhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Natural%20Gashttp://www.eandp.demon.nl/glossary/GLOS-W.HTM#well%20borehttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Mudshttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Oilhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Natural%20Gashttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#SI%20Unithttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Joule%23Joulehttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#BTU%23BTUhttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Cubic%20Metre%23Cubic%20Metre


29/56

Lay barge Vessel specially equipped to lay submarine pipelines.

LCM Lost Circulation Material

Licence

Right to explore for and exploithydrocarbon reserves within a

defined area.

Licence Rounds:

Round 1

Award date 1964, 348Blocksin SNS and CNS

Round 2 Award date 1965, 127Blocksin SNS,IS and EC.

Round 3

Award date 1970, 106Blocksin SNS,NNSand IS.

Round 4

Award date 1971/72, 282Blocksin SNS,NNSand West of

Shetlands (WoS).

Round 5

Award date 1977/78, 44BlocksinSNS,NNS,IS. SWApproaches, W. Scotland.

Round 6Award date 1978/79/80, 42 Blocks inSNS,NNS,IS, SW

Approaches, W.Shetlands, Cardigan Bay, Bristol Channel.

Round 7Award date 1980/81, 90BlocksinSNS,NNS,EC, SW

Approaches, W.Shetlands.

Round 8

Award date 1983, 70BlocksinSNS,NNS,IS, W.Shetlands,

E.Shetlands, Bristol Channel.

Round 9

Award date 1985, 93BlocksinSNS,NNS,IS, EC, SWApproaches, W.Shetlands, W.Scotland.

http://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Hydrocarbonshttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Hydrocarbonshttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/UKCS.HTM#SNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#CNShttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/UKCS.HTM#SNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#Irish%20seahttp://www.eandp.demon.nl/glossary/UKCS.HTM#Eng%20Channelhttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/UKCS.HTM#SNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#NNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#NNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#Irish%20seahttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/UKCS.HTM#SNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#NNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#NNShttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/UKCS.HTM#SNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#SNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#NNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#Irish%20seahttp://www.eandp.demon.nl/glossary/UKCS.HTM#Irish%20seahttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/UKCS.HTM#SNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#SNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#NNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#Irish%20seahttp://www.eandp.demon.nl/glossary/UKCS.HTM#Irish%20seahttp://www.eandp.demon.nl/glossary/UKCS.HTM#Cardigan%20Bayhttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/UKCS.HTM#SNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#SNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#NNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#Eng%20Channelhttp://www.eandp.demon.nl/glossary/UKCS.HTM#Eng%20Channelhttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/UKCS.HTM#SNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#SNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#NNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#Irish%20seahttp://www.eandp.demon.nl/glossary/UKCS.HTM#Irish%20seahttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/UKCS.HTM#SNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#SNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#NNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#Irish%20seahttp://www.eandp.demon.nl/glossary/UKCS.HTM#Irish%20seahttp://www.eandp.demon.nl/glossary/UKCS.HTM#Eng%20Channelhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Hydrocarbonshttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/UKCS.HTM#SNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#CNShttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/UKCS.HTM#SNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#Irish%20seahttp://www.eandp.demon.nl/glossary/UKCS.HTM#Eng%20Channelhttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/UKCS.HTM#SNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#NNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#Irish%20seahttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/UKCS.HTM#SNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#NNShttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/UKCS.HTM#SNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#NNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#Irish%20seahttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/UKCS.HTM#SNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#NNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#Irish%20seahttp://www.eandp.demon.nl/glossary/UKCS.HTM#Cardigan%20Bayhttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/UKCS.HTM#SNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#NNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#Eng%20Channelhttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/UKCS.HTM#SNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#NNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#Irish%20seahttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/UKCS.HTM#SNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#NNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#Irish%20seahttp://www.eandp.demon.nl/glossary/UKCS.HTM#Eng%20Channel


30/56

Round 10

Award date 1987, 51BlocksinSNS,NNS,W.Shetlands.

Round 11

Award date 1989, 109Blocksin SNS,NNS,CNS, IS, ManxBasin, EC, Cardigan Bay, Shetland Area.

Round 12Award date 1991, 74BlocksinSNS,NNS,CNS,IS, Manx

Basin, EC, MF.

Round 13Award date 1991, 66Blocksin North, East & West

Shetlands Areas.

Round 14 (Phases I & II)Award date 1993, 104Blocksin SNS,NNS,CNS, IS,EC,

Cardigan Bay.

Round 14 (Phases III)

Award date 1993, 6 Blocks in SW Approaches.

Round 15

Award date 1994, 29BlocksinSNS,CNS.

Round 16

Award date 1995, 79BlocksinSNS,NNS,CNS, WoS,EC,

Cardigan Bay, IS.

Round 17

Award date 1997, 114Blocksin SNS,NNS, RockallTrough, WoS.

Round 18

Award date 1998, 78BlocksinSNS,CNS,NNS.(DTI press release P/98/969: 1 December 1998 at

http://www.og.dti.gov.uk/licence/18rnd_m.htm

Licensee(s)

Companies that Government believes are capable of satisfying

various conditions of aLicence.

Light oil Shorter chains ofhydrogen andcarbon atoms.

http://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/UKCS.HTM#SNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#SNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#NNShttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/UKCS.HTM#SNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#NNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#NNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#CNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#Irish%20seahttp://www.eandp.demon.nl/glossary/UKCS.HTM#Eng%20Channelhttp://www.eandp.demon.nl/glossary/UKCS.HTM#Cardigan%20Bayhttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/UKCS.HTM#SNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#SNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#NNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#CNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#CNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#CNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#Irish%20seahttp://www.eandp.demon.nl/glossary/UKCS.HTM#Eng%20Channelhttp://www.eandp.demon.nl/glossary/UKCS.HTM#Moray%20Firthhttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/UKCS.HTM#SNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#NNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#NNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#CNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#Irish%20seahttp://www.eandp.demon.nl/glossary/UKCS.HTM#Eng%20Channelhttp://www.eandp.demon.nl/glossary/UKCS.HTM#Eng%20Channelhttp://www.eandp.demon.nl/glossary/UKCS.HTM#Cardigan%20Bayhttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/UKCS.HTM#SNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#SNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#CNShttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/UKCS.HTM#SNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#SNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#NNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#CNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#CNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#CNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#Eng%20Channelhttp://www.eandp.demon.nl/glossary/UKCS.HTM#Eng%20Channelhttp://www.eandp.demon.nl/glossary/UKCS.HTM#Cardigan%20Bayhttp://www.eandp.demon.nl/glossary/UKCS.HTM#Irish%20seahttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/UKCS.HTM#SNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#NNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#NNShttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/UKCS.HTM#SNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#SNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#CNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#NNShttp://www.og.dti.gov.uk/licence/18rnd_m.htm%20http://www.og.dti.gov.uk/licence/18rnd_m.htm%20http://www.eandp.demon.nl/glossary/LEGISL~1.HTM#Licence%23Licencehttp://www.eandp.demon.nl/glossary/LEGISL~1.HTM#Licence%23Licencehttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Hydrogen%23Hydrogenhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Hydrogen%23Hydrogenhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Carbon%23Carbonhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Carbon%23Carbonhttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/UKCS.HTM#SNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#NNShttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/UKCS.HTM#SNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#NNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#CNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#Irish%20seahttp://www.eandp.demon.nl/glossary/UKCS.HTM#Eng%20Channelhttp://www.eandp.demon.nl/glossary/UKCS.HTM#Cardigan%20Bayhttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/UKCS.HTM#SNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#NNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#CNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#Irish%20seahttp://www.eandp.demon.nl/glossary/UKCS.HTM#Eng%20Channelhttp://www.eandp.demon.nl/glossary/UKCS.HTM#Moray%20Firthhttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/UKCS.HTM#SNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#NNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#CNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#Irish%20seahttp://www.eandp.demon.nl/glossary/UKCS.HTM#Eng%20Channelhttp://www.eandp.demon.nl/glossary/UKCS.HTM#Cardigan%20Bayhttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/UKCS.HTM#SNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#CNShttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/UKCS.HTM#SNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#NNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#CNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#Eng%20Channelhttp://www.eandp.demon.nl/glossary/UKCS.HTM#Cardigan%20Bayhttp://www.eandp.demon.nl/glossary/UKCS.HTM#Irish%20seahttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/UKCS.HTM#SNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#NNShttp://www.eandp.demon.nl/glossary/MEASUR~1.HTM#Blockhttp://www.eandp.demon.nl/glossary/UKCS.HTM#SNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#CNShttp://www.eandp.demon.nl/glossary/UKCS.HTM#NNShttp://www.og.dti.gov.uk/licence/18rnd_m.htm%20http://www.eandp.demon.nl/glossary/LEGISL~1.HTM#Licence%23Licencehttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Hydrogen%23Hydrogenhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Carbon%23Carbon


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Lightering Unloading cargo from large marine tankers into smaller tankers thatcan enter shallow-water ports.

Liner []Small diameter casing extending into producing layer from justinside bottom of finalstring ofcasingcemented in a well.

Liquefied Natural Gas (LNG) Gas, mainly methane, liquefied under pressure and low temperature.

Liquefied Petroleum Gas (LPG) Pressure or refrigeration liquefies lighterhydrocarbons, such aspropane,butane,pentane, and mixtures of these gases.

LNG Carrier Tanker, with insulated pressure tanks, designed to carry refrigeratedLNG shipments.

LOGGSLincolnshire Offshore Gas Gathering System (UKCS)

Lost Time Injury (LTI) []Any work related injury or illness which prevents that person from

doing any work day afteraccident.

Lost Time Injury Frequency (LTIF) []Number of LTIs recorded for a group of workers, per million hoursworked by that group.

LSA Life Saving Appliances

LSA Low Specific Activity (Radioactive Scale)

LWD

logging-while-drilling

http://www.eandp.demon.nl/glossary/EXPLOR~1.HTM#Drill%20String%23Drill%20Stringhttp://www.eandp.demon.nl/glossary/EXPLOR~1.HTM#Drill%20String%23Drill%20Stringhttp://www.eandp.demon.nl/glossary/EXPLOR~1.HTM#Casing%23Casinghttp://www.eandp.demon.nl/glossary/EXPLOR~1.HTM#Cement%23Cementhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Methane%23Methanehttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Hydrocarbons%23Hydrocarbonshttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Hydrocarbons%23Hydrocarbonshttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Hydrocarbons%23Hydrocarbonshttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Propane2%23Propane2http://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Butane%23Butanehttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Pentane%23Pentanehttp://www.eandp.demon.nl/glossary/EXPLOR~1.HTM#UKCShttp://www.eandp.demon.nl/glossary/SAFETY.HTM#Injury%23Injuryhttp://www.eandp.demon.nl/glossary/SAFETY.HTM#Accident%23Accidenthttp://www.eandp.demon.nl/glossary/SAFETY.HTM#Accident%23Accidenthttp://www.eandp.demon.nl/glossary/EXPLOR~1.HTM#Drill%20String%23Drill%20Stringhttp://www.eandp.demon.nl/glossary/EXPLOR~1.HTM#Casing%23Casinghttp://www.eandp.demon.nl/glossary/EXPLOR~1.HTM#Cement%23Cementhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Methane%23Methanehttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Hydrocarbons%23Hydrocarbonshttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Propane2%23Propane2http://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Butane%23Butanehttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Pentane%23Pentanehttp://www.eandp.demon.nl/glossary/EXPLOR~1.HTM#UKCShttp://www.eandp.demon.nl/glossary/SAFETY.HTM#Injury%23Injuryhttp://www.eandp.demon.nl/glossary/SAFETY.HTM#Accident%23Accident


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m

Thousands

MAFF

Ministry of Agriculture, Fisheries and Food, in UK

Magma Molten material that makes up Earth's crust.

MAIB Marine Accident Investigation Branch, in UK.

Marginal Field Afield that may not produce enough net income to make it worth

developing at a given time; should technical or economic conditions

change, such a field may become commercial.

Marine Riser Pipe connecting offshore installation to a subseawellhead or

pipeline for drilling or production purposes.

MARPOL []Marine Pollution Convention

Material Safety Data Sheet (MSDS) Issued by manufacturer of chemical substances that sets out hazards

likely to be encountered by those who come into contact withsubstance.

Mature

When source rock starts to generate hydrocarbons.

mcf Thousands of Cubic Feet (of Gas)

Measured Depth Depth of well measured along well bore.

MEDEVAC Evacuation for medical reasons from work location to a hospital.

Megawatt MW = one million watts

Mercaptans

http://www.eandp.demon.nl/glossary/PRODUC~1.HTM#Fieldhttp://www.eandp.demon.nl/glossary/PRODUC~1.HTM#Fieldhttp://www.eandp.demon.nl/glossary/FISCAL.HTM#Commercial%20Field%23Commercial%20Fieldhttp://www.eandp.demon.nl/glossary/GLOS-W.HTM#Wellheadhttp://www.eandp.demon.nl/glossary/GLOS-W.HTM#Wellheadhttp://www.eandp.demon.nl/glossary/PRODUC~1.HTM#Pipeline%23Pipelinehttp://www.eandp.demon.nl/glossary/ENVIRO~1.HTM#Hazardhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Hydrocarbonshttp://www.eandp.demon.nl/glossary/GLOS-W.HTM#well%20borehttp://www.eandp.demon.nl/glossary/PRODUC~1.HTM#Fieldhttp://www.eandp.demon.nl/glossary/FISCAL.HTM#Commercial%20Field%23Commercial%20Fieldhttp://www.eandp.demon.nl/glossary/GLOS-W.HTM#Wellheadhttp://www.eandp.demon.nl/glossary/PRODUC~1.HTM#Pipeline%23Pipelinehttp://www.eandp.demon.nl/glossary/ENVIRO~1.HTM#Hazardhttp://www.eandp.demon.nl/glossary/CHEMIC~1.HTM#Hydrocarbonshttp://www.eandp.demon.nl/glossary/GLOS-W.HTM#well%20bore


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Strong-smelling compounds ofcarbon,hydrogen and sulphur found

in oil and gas. Added tonat

Oil Gas Terms

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