A – B – C – D – E – F – G – H – I – J – K – L – M – N – O – P – R – S – T – U – V – W – X
| IDEL | IDEL Log |
| IMAG | Image Analysis Report |
| ILOGS | Image Logs |
| IDLH | Immediately dangerous to life or health |
| ISM | IMO’s International Safety Management (code) |
| IPF | Impact producing factors |
| IOR | Improved oil recovery |
| ICS | Incident Command System |
| IC | Incident commander |
| INCR | Incline Report |
| INCRE | Incline Report |
| GPIT | Inclinometry Tool Log |
| INDRS | IND RES Sonic Log |
| IOC | Independent oil company |
| IPAA | Independent Petroleum Association of America |
| I3P | Independent third party |
| INDWE | Individual Well Record Report |
| INDT | INDT Log |
| IEL | Induction Electrical Log |
| IEB | Induction Electro BHC Log |
| IL | Induction Log |
| IBP | Inflatable bridge plug |
| ICD | Inflow Control Device |
| IPR | Inflow performance relationship |
| ITS | Influx To Surface |
| IC | Information collection |
| IM | Information management |
| IEP | Initial exploration plan |
| IEP/DOCD | Initial exploration plan and development operations coordination documents |
| IPO | Initial public offering |
| INJEC | Injection Falloff Log |
| IJL | Injection Log |
| I:P | Injector To Producer Ratio |
| ILI | In-line inspection (platforms for natural gas pipelines) |
| ID | Inner or Internal Diameter (of a tubular component such as a casing) |
| INSUR | Inrun Survey Report |
| IBOP | Inside blowout preventer |
| ITP | Inspection and test plan |
| IRC | Inspection release certificate |
| IR | Inspection report |
| ITR | Inspection Test Record |
| IWOCS | Installation/Workover control system |
| IPC | Installed Production Capacity |
| IEEE | Institute of Electrical and Electronics Engineers |
| IUG | Instrument Utility Gas |
| IDC | Intangible Drilling Costs |
| ICV | Integrated Cement Volume (of Borehole)(in Cubic Metres) |
| ICSU | Integrated Commissioning and Start Up |
| IHV | Integrated Hole Volume (of Borehole) (in Cubic Metres) |
| IOW | Integrity operating windows |
| IP | Intellectual property |
| ICE | Intercontinental Exchange |
| IPCC | Intergovernmental Panel on Climate Change |
| IBC | Intermediate Bulk Container |
| ICP | Intermediate Casing Point |
| IMT | Intermediate metal conduit |
| IP | Intermediate pressure |
| IAT | Internal Active Turret |
| IF | Internal Flush tool joint |
| ITD | Internal Turret Disconnectable |
| IAWC | International Alliance for Well Control |
| IADC | International Association of Drilling Contractors |
| OGP | International Association of Oil & Gas Producers |
| MARPOL | International Convention for the Prevention of Pollution from Ships |
| IEA | International Energy Agency |
| ILTA | International Liquid Terminals Association |
| IMCA | International Marine Contractors Association |
| IMO | International Marine Organization |
| IMDG | International Maritime Dangerous Goods (code) |
| IMF | International Monetary Fund |
| IOC | International Oil Company |
| IPE | International Petroleum Exchange |
| ISO | International Standards Organization (formally, International Organization for Standardization) |
| IWCF | International Well Control Forum |
| IWCF certification | International Well Control Forum Blowout Prevention & Well Control certification |
| IP | Internet protocol |
| IR | Interpretation Report |
| INGAA | Interstate Natural Gas Association of America |
| ICV | Interval Control Valve |
| IPTT | Interval pressure transient test |
| ICoTA | Intervention and Coiled Tubing Association |
| IM | Inventory management |
| IUR | Inventory Update Reporting |
| INVES | Investigative Program Report |
| ITT | Invitation to tender |
| IPLS | IPLS Log |
| IRTJ | IRTJ Gamma Ray Slimhole Log |
| ISFBG | ISF BHC GR Log |
| ISFCD | ISF Conductivity Log |
| ISFGR | ISF GR Casing Collar Locator Log |
| ISFSL | ISF SLS MSFL Log |
| ISF | ISF Sonic Log |
| ISFP | ISF Sonic True Vertical Depth Playback Log |
| ISFPB | ISF True Vertical Depth Playback Log |
| ISFL | ISF-LSS Log |
| ISN | ISNetworld |