A – B – C – D – E – F – G – H – I – J – K – L – M – N – O – P – R – S – T – U – V – W – X
| EBIT | Earnings before interest and taxes |
| EBITDA | Earnings before interest, taxes, depreciation, and amortization |
| EPS | Earnings per share |
| EB | East Breaks Gulf of Mexico leasing area |
| EC | East Cameron Area Gulf of Mexico leasing area |
| E/W | East/west |
| ETAP | Eastern Trough Area Project |
| ELT | Economic Limit Test |
| EDRC | Effective daily recovery capacity (of oil skimmers) |
| EWTA | Eglin Water Test Area |
| EHT | Electric Heat Trace |
| EL | Electric Log |
| E&I | Electrical and Instrumentation |
| EEHA | Electrical equipment in hazardous areas |
| EFL | Electrical Flying Lead |
| EI&C | Electrical instrumentation and control |
| EMT | Electrical metallic tubing (conduit) |
| EPCU | Electrical Power Conditioning Unit |
| ESP | Electrical submersible pump |
| ETU | Electrical Test Unit |
| ECRD | Electrically Controlled Release Tool |
| ERW | Electric-resistance welded (pipe) |
| EDM | Electro-discharge machining |
| EM | Electromagnetic |
| EMI | Electromagnetic inspection |
| EPT | Electromagnetic Propagation |
| EMP | Electromagnetic Propagation Log |
| ETTD | Electromagnetic Thickness Test |
| ESD | Electrostatic discharge |
| ECC | Emergency control center |
| EDP | Emergency Disconnect Package |
| EDS | Emergency disconnect sequence |
| EDS | Emergency disconnect system |
| EER | Emergency escape and refuge (system) |
| EEP | Emergency evacuation plan |
| ERC | Emergency response and control |
| ERP | Emergency response plan |
| ERT | Emergency response team |
| ERT | Emergency Response Training |
| ESD | Emergency Shut-Down |
| EM | EMOP Log |
| EMOP | EMOP Well Site Processing Log |
| EOFL | End of Field Life |
| EOR | End of operations (report) |
| EOT | End of Tubing |
| EOW | End of well (report) |
| EWR | End Of Well Report |
| EROEI | Energy returned on energy invested |
| ENJ | Enerjet Log |
| ENGF | Engineer Factual Report |
| EFR | Engineering Factual Report |
| ENG | Engineering Log |
| ENGPD | Engineering Porosity Data |
| EPCI | Engineering, procurement, construction, and installation |
| EOR | Enhanced oil recovery |
| EN PI | Enhanced Productivity Index Log |
| Eni | Ente Nazionale Idrocarburi S.p.A. (Italy) |
| ERP | Enterprise resource planning |
| EA | Environmental Assessment |
| EIA | Environmental impact assessment |
| EIS | Environmental impact statement |
| ERA | Environmental risk assessment |
| ESI | Environmental Sensitivity Index |
| EPLG | Epilog |
| EPL | EPL Log |
| EPLPC | EPL-PCD-SGR Log |
| EPTNG | EPT-NGT Log |
| EOS | Equation of state |
| EVI | Equipment verification inspection |
| ECD | Equivalent circulating density |
| EMG | Equivalent Mud Gradient |
| EMW | Equivalent Mud Weight |
| EERA | Escape, evacuation, and rescue analysis |
| EFH | Essential fish habitat |
| EUR | Estimated ultimate recovery |
| C2 | ethane |
| EGMBE | Ethylene Glycol Mono-Butyl Ether |
| EI | Eugene Island Area Gulf of Mexico leasing area |
| EAGE | European Association of Geoscientists & Engineers |
| ECHA | European Chemicals Agency |
| EU | European Union |
| EVARE | Evaluation Report |
| ETA | Event tree analysis |
| EW | Ewing Bank Gulf of Mexico leasing area |
| EWD | Expand-while-drilling (tools) |
| ESP | Expected surface pressure |
| ESPcc | Expected surface pressure for the completion case |
| E&A | Exploration and Appraisal |
| E&P | Exploration and production |
| EPIDORIS | Exploration and Production Integrated Drilling Operations and Reservoir Information System |
| EA | Exploration Asset |
| EDP | Exploration Drilling Program Report |
| EDR | Exploration Drilling Report |
| XL | Exploration Licence (United Kingdom), a type of onshore licence issued between the First Onshore Licensing Round (1986) and the Sixth (1992) |
| EP | Exploration plan |
| XMRI | Extended Range Micro Imager (Halliburton) |
| ERD | Extended Reach (Drilling) |
| ERW | Extended-reach well |
| ECP | External Casing Packer |
| XOM | ExxonMobil |
| EZSV | EZSV Log |