E
EAFS Effective Aerial Film Speed
EAGE European Association of Geoscientists & Engineers website
EAHC   East Asia Hydrographic Commission (IHO) webpage
EAME  Europe, Africa, Middle East 
EARL  East Asia Response Pte. Ltd. website 
EASA  European Aviation Safety Agency 
EAtHC Eastern Atlantic Hydrographic Commission (EAtHC) webpage 
EAWR  Electricity At Work Regulations (1989) 
E&A Exploration and Appraisal.
EB  Electrical Building 
EBB Electronic Bulletin Board
EBD Emergency Blow Down
EBIT Earnings Before Interest and Taxes (and minority interest)
EBITDA Earnings Before Interest, Taxes, Depreciation and Amortisation (and minority interest) 
EBRD  European Bank for Reconstruction and Development website
EBS Environmental Baseline Survey
EC European Community / Commission 
ECA Engineering Critical Assessment
  Economic Commission for Africa
  Emission Control Data 
ECAR East Central Area Reliability Coordination Agreement (NERC Region, USA)
ECC Emergency Communication Center
ECD Equivalent Circulating Density
ECDIS Electronic Chart Display Information System
ECMA European Computers Manufacturers Association website
ECMWF European Centre for Medium Range Forecasting website
ECN  Engineering Change Notice 
ECOPS European Committee on Oceanographic and Polar Science (led to the formation of the European Polar Board in October 1995- see EPB)
ECS Electrical Control / Chart System
EDS Electrical Distribution System
EDG Emergency Diesel Generator
EDICS Evaluation of Diverless IRM Completions and deep-sea Structures (UK/Norway research project)
EDMED European Directory of Marine Environmental Data (UK) website
EDMS Electronic Document Management System
EDP Emergency Depressurisation
  Emergency Disconnect Package
EDTC  European Diving Technology Committee website  
EEMS   Environmental Emissions Management System
EEMUA  Engineering Equipment and Material Users Association 
EER Escape, Evacuation and Rescue
Energy, Efficiency Ratio
EEZ  Exclusive Economic Zone
EERA  Evacuation, Escape and Rescue Analysis
EEZ  Exclusive Economic Zone
EFAT Extended Factory Acceptance Test
EFC European Federation of Corrosion
EFP Exchange of Futures for Physicals
EFW Electric Fusion Welded
EG Environment Group
EGAS Egyptian natural GAS holding company
EGG  Exploration Gravity Gradiometer 
EGS European Geophysical Society (ended 31 december 2003 - merged with EUG to fund the European Geosciences Union (EGU))
EGSA  Electical Generating Systems Association (USA) website 
EGU European Geosciences Union website
EHF Extra High Frequency
EHS Extra High Strength
EHSR's Essential Health and Safety Requirements
E&I  Electricity & Instrumentation
EIA Environmental Impact Assessment 
  Energy Information Administration (USA) website
EL Exchange Line
ELCB Earth Leakage Circuit Breaker
elev  Elevator
ELFEXT Equal Level Far End CrossTalk
ELI  Earth Loop Impedance 
ELO Environmental liaison officer 
ELRS Emergency Load Release System
EMAS  Environmental Management and Audit Scheme 
EMC Electromagnetic Compatibility
EMF Electro Magnetic Fields
EMGS ElectroMagnetic GeoServices (Norwegian company) 
EMI Electromagnetic Inspection
  Electromagnetic Interference 
EM-LWD  Electromagnetic Lodging While Drilling 
EMP Environmental Management Plan
EMS  Environmental Management System 
EMW  Equivalent Mud Weight 
EN European Norm
ENC  Electronic Navigational Chart
eng  Engine
ENP Electroless Nickel Plated
ENVID  Environmental Impact Identification 
EOR Enhanced Oil Recovery
EORD  Engineering and Operations Reference Document 
E&P Exploration and Production. 
EPA   Environmental Protection Agency (USA)  
EPB  European Polar Board  website 
EP  Engineering and Procurement 
EPC Engineering, Procurement and Construction
EPCC  Engineering, Procurement, Construction and Commissioning 
EPCCS  Engineering, Procurement, Construction, Commissioning and Start-up
EPCI  Engineering, Procurement, Construction and Installation
EPCL  Eleme Petrochemicals Co. Limited webpage (a division of NNPC
EPDM Ethylene-Propylene-Diene-Monomer
EPFS  Electronic Position Fixing System 
EPIC Engineering, Procurement, Installation and Construction / Commissioning
EPG  Electrical Power Generator 
  Emergency Power Generator  
  Emergency Procedure Guidelines 
EPIRB Emergency Position Indication Radio Beacon
EPR Ethylene Propylene Rubber
  Electrical Power Requirement
  Exxon Production Research company (Houston, Texas) Exxonmobil website
  Emergency Planning Room
  Emergency Preparedness and Response
  Engine/Exhaust Pressure Ratio
  Engineering Planning Request / Property Records
  Environmental Program Requirements / Report
  Equipment Performance / Problem Report
  Explosion Protection review 
EPROM  Erasable Programmable Read Only Memory 
EPRS Emergency Pipe-line Repair System
EPS Early Production System
  Emergency Power Supply 
  Earnings Per Share
  IMO performance standard for ECDIS 
EPSA Exploration & Production Sharing Agreement 
EPSC Engineering, Procurement, Supply and Construction (contract)
EPSCC Engineering, Procurement, Supply, Construction and Commissioning (contract)
EPSRC  Engineering & Physical Sciences Research Council (UK) website
EPU Electrical Power Unit
EQ  Engineering Query 
EQD Emergency Quick Disconnect
EQDP Emergency Quick Disconnect Package
equip  Equipment
E&R Ear & Mouth (signalling)
ER Emergency Response
  Extended Reach 
ERA  European Research Area
ERAC  Emergency Response Activity Center (Varna, Bulgaria, Black Sea) website 
ERCOT Electric Reliability Council of Texas (NERC Region, USA)
ERC Extreme Reservoir Contact 
ERD Extended Reach Drilling
  Engineering Reference Document 
EROD EthoxyResorufine-O-Deethylase
ERP Emergency Response Plan
  Enterprise Resource Planning
  Emergency Radio Point
ERRI Emergency Response & Research Institute
ERRVA  Emergency Response and Rescue Vessel Association (UK) website
ERT Emergency Response Team
ERW Electric Resistances Welding
ES Echo Sounder
  Electrical Supply
  Extended Spindle 
ESCAP  Economic and Social Commission for Asia and the Pacific UNESCAP website
ESD Emergency Shutdown
  ElectroStatic Discharge 
ESP Electrical Submersible Pump 
ESDP  Emergency Shutdown Panel 
ESDS  Emergency Shutdown System
ESDV Emergency Shutdown Valve
ESI  Environmental Sensitivity Index 
ESIA Environmental and Socio-economic Impact Assessment
ESP Electrical Submersible Pump
ESS Environmental Stress Screening
  Expandable Sand Screen 
ESSA  Emergency Systems Survivability Analysis 
ESV Emergency Support Vessel
ESW Electro Slag Welding
ETA Estimated Time of Arrival 
ETD  Embedded Temperature Detector 
  Estimated Time of Departure 
ETDE  Energy Technology Data Exchange 
ETHRT Emergency Tubing Hanger Recovery Tool
ETLP Extended Tension Leg Platform 
ETTF  Expandable Tubular Technology Forum 
ETRERA  Escape. Temporary Refuge Evacuation Rescue Analysis 
ETSF  Electronic Trading Standard Format 
ETSI European Telecommunications Standards Institute  website
ETU Electronic Test Unit
ETV Emergency Towing Vessel
EU  European Union 
EUG European Union of Geosciences (merged with European Geophysical Society EGS to found EGU)
EUROPIA  European Petroleum Industry Association 
EURONODIM EUROpean Network for Oceanographic Data and Information Management
EUT Equipment Under Test
EV  Enterprise Value
EVA  Ethylene Vinyl Acetate 
EVST  Enhanced Vertical Shelf Tree (Trade-Mark from FMC Technologies)
EW  Exploratory Well 
EWA European Water Association - website 
EWG Exempt Wholesale Generator
EWPCA European Water Pollution Control Association (now called European Water Association - EWA)
EWT  Extended Well Test 
EXL Exploration Licence